Journal of Technology and Vocational Studies
type: channel
description: Welcome to the Jurnal Teknologi dan Vokasi The Editor of the Jurnal Teknologi dan Vokasi (JTV) of the Faculty of Vocational Studies, Padang Technology Institute invites Researchers, Academics, Practitioners and Professionals to contribute their writings, in the fields of: Electrical Power System Electronic Signaling System New Renewable Energy Energy Engineering and Management Electrical Installation Engineering Building Construction Engineering Transportation construction Manufacture Material Energy convertion both in the form of research results and literature reviews that have never been published before in other media. Jurnal Teknologi dan Vokasi is a national journal managed by the Vocational Faculty of the Institut Teknologi Padang and published by ITP Press, 2 (two) times a year in January and July. This journal is available in print and electronically and can be accessed online and can be downloaded for free (Open Access). Abstracting/ Indexing by Crossref, Google Scholar, Microsoft Academic, IOS (Indonesia OneSearch), Garuda (Garba Rujukan Digital), DOAJ (Directory of Open Access Journals). ISSN 2964-3694 (Online - Elektronik) ISSN 2985-8690 (Media Cetak) DOI: https://doi.org/10.21063/jtv
publisher: ITP Press
language: en
publication name: Journal of Technology and Vocational Studies
issn: 2985-8690
items: ANALISIS RISIKO SINTERISASI PADA SISTEM PEMBAKARAN BERBASIS PASIR SILIKA
items: PENGUJIAN MESIN PENCACAH KEMASAN AIR MINUM BEKAS
items: A review of the cascade refrigeration system
items: SIFAT MEKANIK KOMPOSIT ARANG AKTIF BERBAHAN DASAR LIMBAH CANGKANG KEMIRI DAN RESIN EPOKSI
items: Tethered Hexacopter Spraying System: for Precision Agriculture
items: STRUCTURAL AND DESIGN MODIFICATION OF A 1-TON CAPACITY MOVABLE LIFTING SYSTEM WITH ELECTRIC MOTOR DRIVE
items: STUDI KELAYAKAN SISTEM PENYALUR PETIR PADA TANGKI LPG 20.000 kg DI AREA CATERPILLAR INDUSTRIES BATAM
items: OPTIMALSASI EFISIENSI ENERGI MELALUI REVITALISASI SISTEM PENCAHAYAAN DI PLTP KARAHA MENGGUNAKAN TEKNOLOGI LED
items: THE EFFECT OF ALTITUDE AND SPEED OF QUADCOPTER DRONES ON THE ACCURACY OF WEATHER DATA MEASUREMENTS BASED ON ANEMOMETER SENSORS
items: FAILURE ANALYSIS OF CENTRIFUGAL PUMP (OVERHUNG 212–P17) USING FMEA METHOD AT PT KILANG PERTAMINA INTERNASIONAL RU II DUMAI
items: HEXACOPTER CONTROL SYSTEM OPTIMIZATION
items: LEAD ACID BATTERY DISCHARGING PROTECTION SYSTEM MANAGEMENT COULOMB COUNTING METHOD
items: DESIGN AND CONSTRUCTION OF A PALLETIZING AUTOMATION SYSTEM USING AN OBJECT-ORIENTED INDUSTRIAL PROGRAMMING MODEL
items: THE EFFECT OF AGGREGATE GRADATION ON THE CHARACTERISTICS OF AC-WC HOT ASPHALT MIXTURE BASED ON MARSHALL TESTING
items: REVIEW OF SOLAR ADSORPTION COOLING SYSTEM
items: THE EFFECT OF ADDING GLASS FILM TO THE SURFACE OF A SOLAR PANEL ON EFFICIENCY AND POWER
items: ANALYSIS OF THE EFFECT OF GAS SEPARATOR SENSITIVITY ON ESP PUMP OPTIMIZATION IN HANDLING GAS LOCK IN GASSY WELLS USING PROSPER V11 SOFTWARE SIMULATOR
items: INCREASED PROPERTIES OF VITRIFIED GLASS-CERAMICS FLY ASH WITH THE ADDITION OF 30 WT.% ALUMINUM SILICATE AND SINTERING TEMPERATURE
items: THE EFFECT OF VARIATIONS OF CaCo3 ON ACTIVATED CHARCOAL IN THE PACK CARBURIZING PROCESS ON INCREASING THE HARDNESS OF LOW CARBON STEEL VIEWED FROM MICRO STRUCTURE AND HARDNESS
items: NUMERICAL STUDY OF 3D FLOW INTERACTION OF AIRFOIL AND FLAT PLATE
items: STUDY OF DISTRIBUTION TRANSFORMER INTERRUPTION ON 20 KV DISTRIBUTION NETWORK AT PT PLN (PERSERO) RAYON NATAR
items: DESIGN OF A HEXACOPTER CONTROL SYSTEM USING FUZZY LOGIC CONTROL
items: ENHANCING VOLTAGE STABILITY AND ENERGY OUTPUT OF PLTM SALIDO IN THE PLN DISTRIBUTION NETWORK
items: MAKING HOLLOW PAVING BLOCKS USING UNIFORMLY GRADED AGGREGATE
items: GUIDANCE IN QUALITY PAVING BLOCK PRODUCTION AT SMALL INDUSTRY UD. SAFIRA TARASO
items: CREATION OF FISH PELLET MAKING MACHINE DRIVE SYSTEM
items: ANALYSIS OF PHOTOVOLTAIC ENERGY PRODUCTION AS AN ELECTRIC CAR CHARGING INFRASTRUCTURE AT THE MUARO JAMBI DPRD OFFICE
items: CONSTRUCTION OF A GOODS ELEVATOR WITH A MANUAL PULLEY SYSTEM
items: ANALYSIS OF ELECTRICITY POTENTIAL WITH THE UTILIZATION OF BRINE WASTE HEAT WITH ORGANIC RANKINE CYCLE (ORC) IN THE X WELL OF THE SORIK MARAPI GEOTHERMAL FIELD
items: PUSHOVER ANALYSIS OF BLOCK B BUILDING, SAWAHLUNTO MARKET

ANALISIS RISIKO SINTERISASI PADA SISTEM PEMBAKARAN BERBASIS PASIR SILIKA
type: item
description: Kinerja sistem pembakaran pada multi-fuel boiler sangat dipengaruhi oleh karakteristik pasir silika sebagai bed material serta kecenderungan terjadinya sinterisasi dan aglomerasi akibat kontaminasi abu biomassa. Penelitian ini menganalisis parameter hidrodinamika bed meliputi Archimedes Number (Ar), Reynolds minimum fluidization (Remf), dan kecepatan minimum fluidisasi (Umf) bersamaan dengan indeks-indeks kimia abu, seperti Ash Index (AI), Bed Index (BI), Agglomeration Alkali Index (AAI), Alkali/Silica ratio, Sintering Agglomeration Risk (SAR dan SART), serta parameter termal seperti PFR, TRF, CRI, dan FI. Data hasil pengamatan menunjukkan nilai Ar berada pada rentang 1,06×10⁶ – 1,27×10⁶, yang mengindikasikan karakteristik partikel pasir dominan berada pada regime fluidisasi stabil. Nilai Remf (177–197) dan Umf (1,04–1,08 m/s) memperkuat bahwa kondisi operasional boiler berada di kisaran fluidisasi yang aman. Indeks kimia menunjukkan AI (0,11–0,13) dan BI (0,08–0,09) tergolong rendah, menandakan risiko fouling dan slagging yang minimal. Rasio Alkali/Silika (0,15–0,19) masih berada dalam batas aman sehingga tidak memicu reaksi pembentukan silikat bertitik leleh rendah. Nilai AAI (0,116–0,151) serta SAR (0,86–1,12) menunjukkan bahwa potensi aglomerasi berada pada tingkat moderate, dipengaruhi oleh variasi kandungan alkali dalam fuel mix (bark, fiber, dan mixed biomass). Parameter termal TRF (0,02–0,29) dan CRI (0,31–0,42) memperlihatkan kecenderungan moderat terhadap pembentukan kerak pada temperatur tinggi, sedangkan FI (0,66–0,73) berada pada kategori stabil. Secara keseluruhan, hasil analisis menunjukkan bahwa kondisi operasi fluidized bed boiler pada industri pulp & paper dalam penelitian ini stabil dan berada dalam rentang aman, dengan risiko sinterisasi dan aglomerasi tergolong moderate–rendah. Pengendalian ukuran pasir, pemantauan kontaminasi alkali, dan optimasi rasio fuel mix direkomendasikan untuk menjaga keandalan operasi jangka panjang.
subject: Article
  topic: section
subject: Pembakaran, Boiler, Pasir Silika
  topic: keywords
creator: Marfizal Marfizal
creator: Dedi Wardianto
creator: Sufiyanto Sufiyanto
rights: Copyright (c) 2026 ITP Press https://creativecommons.org/licenses/by-sa/4.0
date: 2026-02-01
publication date: 2026-02-01
doi: 10.21063/jtv.2026.4.1.%p

PENGUJIAN MESIN PENCACAH KEMASAN AIR MINUM BEKAS
type: item
description: Mesin pencacah plastik merupakan mesin penghancur plastik menjadi ukuran yang lebih kecil. Banyaknya sampah plastik dilingkungan sekitar berdampak pada pencemaran lingkungan, adanya perkembangan ilmu pengetahuan dan teknologi pencemaran sampah plastik dapat dijadikan bahan baku daur ulang plastik. Menggunakan software Autodesk Inventor bertujuan untuk merancang mesin pencacah plastik secara spesifik , dalam penelitian dimulai dengan perencanaan untuk mengidentifikasi masalah sekaligus mengumpulkan data. Konsep produk untuk menentukan fungsi dan struktur keseluruhan yang digambarkan dengan blok diagram. mesin pencacah plastik menggunakan penggerak motor bensin yang dintransmisikan melalui pulley dan v-belt untuk memutarkan poros dan pisau pencacah. Agar mesin dapat beroprasi, motor bensin yang digunakan 5,5 HP, putaran poros motor (n) = 2500 rpm,. Proses pencacahan plastik pada mesin dilengkapi 5 buah mata pisau, dengan 3 pisau putar yang menempel pada poros dan 2 pisau diam yang berada pada bagian block mesin. Bahan pisau yang digunakan baja hss agar hasil dari proses pencacahan plastik sesuai dengan saringan yang berdiameter 12 mm. Dimensi keseluruhan mesin pencacah plastik, panjang 580 mm, lebar 600 mm, dan tinggi 1180 mm sehingga mudah diatur dalam penempatan karena tidak terlalu memakan ruangan.
subject: Article
  topic: section
subject: Plastik
  topic: keywords
subject: Pengujian mesin pencacah
  topic: keywords
creator: sulaiman ali
creator: Alif Nera
rights: Copyright (c) 2026 ITP Press https://creativecommons.org/licenses/by-sa/4.0
date: 2026-02-01
publication date: 2026-02-01
doi: 10.21063/jtv.2026.4.1.%p

A review of the cascade refrigeration system
type: item
description: This article presents a comprehensive literature review of the cascade refrigeration system (CRS), a crucial technology capable of reaching evaporation temperatures as low as -170°C while extending the operational range of conventional refrigeration systems. The discussion encompasses various CRS design configurations, refrigerant analyses, and system optimization efforts. Furthermore, the paper identifies the influence of specific parameters on system performance, economic analysis, and practical applications, concluding with recommendations for future research.
subject: Article
  topic: section
subject: cascade refrigeration cycle; automatic cascade refrigeration system; refrigerant; absorption
  topic: keywords
creator: Arfidian Rachman
creator: Arfita Yuana Dewi
creator: Asnal Effendi
rights: Copyright (c) 2026 ITP Press https://creativecommons.org/licenses/by-sa/4.0
date: 2026-02-01
publication date: 2026-02-01
doi: 10.21063/jtv.2026.4.1.%p

SIFAT MEKANIK KOMPOSIT ARANG AKTIF BERBAHAN DASAR LIMBAH CANGKANG KEMIRI DAN RESIN EPOKSI
type: item
description: This study investigates the effect of weight fraction in an epoxy-based composite reinforced with candlenut shell charcoal powder on mechanical properties, specifically shear strength and flexural strength. The filler consisted of candlenut shell charcoal powder with a particle size of 841 to 1190 μm. The candlenut shell charcoal to epoxy matrix ratios were varied at 55:45 %wt, 60:40 %wt, 65:35 %wt, 70:30 %wt, 75:25 %wt, 80:20 %wt, and 85:15 %wt. Composite specimens were prepared by homogeneous mixing, molding, and followed by room-temperature curing before mechanical testing. Mechanical characterization was conducted through flexural and shear tests using a Universal Testing Machine (UTM) with appropriate fixtures for each test method. The results indicate that increasing the filler fraction tends to reduce the mechanical performance of the composites. The highest flexural strength was obtained at 55:45 %wt by 16.63 MPa, while the lowest value was recorded at 85:15 %wt by 4.88 MPa. The highest shear strength also occurred at 55:45 %wt by 8.87 MPa and reached the minimum at 80:20 %wt by approximately 1.65 MPa, with a sharp decrease observed at 70:30 %wt. Overall, the findings demonstrate that increasing the candlenut shell charcoal powder fraction decreases both flexural and shear strengths. This degradation at high filler loadings is associated with reduced epoxy wetting of particles, increased agglomeration and porosity, and weakened load transfer across the filler–matrix interface. These results suggest that the composite formulation requires an optimum filler fraction and careful control of mixing and molding processes to achieve more stable mechanical performance.
subject: Article
  topic: section
creator: Putri Pratiwi
creator: Nurzal Nurzal
creator: Hafni Hafni
creator: Mastariyanto Perdana
rights: Copyright (c) 2026 ITP Press https://creativecommons.org/licenses/by-sa/4.0
date: 2026-02-01
publication date: 2026-02-01
doi: 10.21063/jtv.2026.4.1.%p

Tethered Hexacopter Spraying System: for Precision Agriculture
type: item
description: The implementation of Unmanned Aerial Vehicles (UAVs) in the agricultural sector has undergone a paradigm shift from passive monitoring to active functional intervention. However, limited battery autonomy and flight instability induced by dynamic payload variations remain critical bottlenecks for large-scale industrial adoption. This paper presents a systematic review of the evolution of agricultural UAVs, focusing on the emergence of tethered hexacopter systems (TKT-6) as a robust solution for persistent, long-duration missions in complex topographies. We synthesize high-impact research (2021–2025) covering high-voltage power transmission, umbilical cable dynamics, and advanced control architectures. A primary emphasis is placed on the transition from conventional PID frameworks to adaptive-robust control strategies. Comparative analysis reveals that the synergy between Disturbance Observers (DOB) and Sliding Mode Control (SMC) significantly mitigates attitude errors and suppresses the "anchor effect" caused by tether tension. Our findings demonstrate that the TKT-6 system effectively maintains positioning precision below 0.2 m even under time-varying payload conditions, offering a transformative approach for precision spraying in steep-terrain orchards, such as mangosteen cultivation.
subject: Article
  topic: section
subject: Roped Drone, Slosh Effect, Robust Control, Hexacopter.
  topic: keywords
creator: Al Al
rights: Copyright (c) 2026 ITP Press https://creativecommons.org/licenses/by-sa/4.0
date: 2026-02-01
publication date: 2026-02-01
doi: 10.21063/jtv.2026.4.1.%p

STRUCTURAL AND DESIGN MODIFICATION OF A 1-TON CAPACITY MOVABLE LIFTING SYSTEM WITH ELECTRIC MOTOR DRIVE
type: item
description: This study investigates the structural and design modification of a 1-ton capacity movable goods lift that was originally operated using a manual hand winch system. The conventional system exhibited several limitations, including high operator effort, insufficient safety features, and inadequate structural stability, which increased the risk of occupational accidents. To overcome these limitations, the lift system was modified by integrating a DC electric motor as the primary drive unit, reinforcing the frame structure with foldable support legs to enhance stability, and incorporating an emergency braking mechanism (spring knife) to improve operational safety. The research methodology included mechanical design, structural analysis, and static load simulation using engineering simulation software. The simulation results indicate that the modified structure provides more uniform load distribution, reduced deformation, and Von Mises stress values that remain within the allowable limits of the material. These findings demonstrate that the proposed modification significantly improves efficiency, safety, and ease of operation. Therefore, the modified movable lift is suitable for practical implementation in workshops, warehouses, and laboratory environments.
subject: Article
  topic: section
subject: Goods Lift
  topic: keywords
subject: Movable Lift
  topic: keywords
subject: Design Modification
  topic: keywords
subject: Dc Motor
  topic: keywords
subject: Structural Reinforcement
  topic: keywords
creator: KARNOVA YANEL
creator: Rozi Saferi
creator: Ismet Eka Putra
rights: Copyright (c) 2026 ITP Press https://creativecommons.org/licenses/by-sa/4.0
date: 2026-02-01
publication date: 2026-02-01
doi: 10.21063/jtv.2026.4.1.%p

STUDI KELAYAKAN SISTEM PENYALUR PETIR PADA TANGKI LPG 20.000 kg DI AREA CATERPILLAR INDUSTRIES BATAM
type: item
description: Penelitian ini bertujuan untuk menganalisa kelayakan dan keharusan pemasangan sistem penyalur petir pada tangki LPG berkapasitas 20.000 kg yang berlokasi di Area Caterpillar Industries Batam. Analisis dilakukan berdasarkan standar IEC 62305, dan NFPA 780 dengan mempertimbangkan karakteristik petir tropis diwilayah Batam yang memiliki hari guruh mencapai 150 – 180 hari pertahun. Metode yang digunakan meliputi penilaian resiko berdasarkan SNI IEC 62305-2, penentuan Lightning Protection Level (LPL) dan perancangan proteksi menggunakan metode Rolling Sphere. Hasil perhitungan menunjukkan bahwa nilai resiko total (<!-- [if gte msEquation 12]><m:oMath><m:r>R</m:r><m:r>=5,1 × </m:r><m:sSup><m:sSupPr><m:ctrlPr></m:ctrlPr></m:sSupPr><m:e><m:r>10</m:r></m:e><m:sup><m:r>-3</m:r></m:sup></m:sSup><m:r>)</m:r></m:oMath><![endif]--> <!-- [if gte vml 1]><v:shapetype id="_x0000_t75" coordsize="21600,21600" o:spt="75" o:preferrelative="t" path="m@4@5l@4@11@9@11@9@5xe" filled="f" stroked="f"> <v:stroke joinstyle="miter"/> <v:formulas> <v:f eqn="if lineDrawn pixelLineWidth 0"/> <v:f eqn="sum @0 1 0"/> <v:f eqn="sum 0 0 @1"/> <v:f eqn="prod @2 1 2"/> <v:f eqn="prod @3 21600 pixelWidth"/> <v:f eqn="prod @3 21600 pixelHeight"/> <v:f eqn="sum @0 0 1"/> <v:f eqn="prod @6 1 2"/> <v:f eqn="prod @7 21600 pixelWidth"/> <v:f eqn="sum @8 21600 0"/> <v:f eqn="prod @7 21600 pixelHeight"/> <v:f eqn="sum @10 21600 0"/> </v:formulas> <v:path o:extrusionok="f" gradientshapeok="t" o:connecttype="rect"/> <o:lock v:ext="edit" aspectratio="t"/> </v:shapetype><v:shape id="_x0000_i1025" type="#_x0000_t75" style='width:73.8pt; height:12pt'> <v:imagedata src="file:///C:/Users/lenov/AppData/Local/Temp/msohtmlclip1/01/clip_image001.png" o:title="" chromakey="white"/> </v:shape><![endif]--> jauh melebihi nilai toleransi resiko <!-- [if gte msEquation 12]><m:oMath><m:r>(</m:r><m:r>RT</m:r><m:r>=</m:r><m:sSup><m:sSupPr><m:ctrlPr></m:ctrlPr></m:sSupPr><m:e><m:r>10</m:r></m:e><m:sup><m:r>-5</m:r></m:sup></m:sSup><m:r…
subject: Article
  topic: section
subject: Sistem Penyalur Petir
  topic: keywords
subject: Tangki LPG 20.000 kg
  topic: keywords
subject: IEC 62305
  topic: keywords
subject: NFPA 780
  topic: keywords
subject: Rolling Sphere
  topic: keywords
subject: Analisa Resiko
  topic: keywords
subject: Area Berbahaya
  topic: keywords
creator: Arif Febriansyah Juwito
creator: Sepannur Bandri
rights: Copyright (c) 2026 ITP Press https://creativecommons.org/licenses/by-sa/4.0
date: 2026-02-01
publication date: 2026-02-01
doi: 10.21063/jtv.2026.4.1.%p

OPTIMALSASI EFISIENSI ENERGI MELALUI REVITALISASI SISTEM PENCAHAYAAN DI PLTP KARAHA MENGGUNAKAN TEKNOLOGI LED
type: item
description: Sistem pencahayaan pada fasilitas industri pembangkit panas bumi memiliki kontribusi besar terhadap konsumsi energi listrik total. Pada PLTP Karaha, penggunaan lampu konvensional seperti HPS dan TL masih menimbulkan inefisiensi energi serta biaya operasional tinggi. Kondisi ini mendorong perlunya revitalisasi sistem pencahayaan dengan teknologi yang lebih hemat energi dan sesuai dengan standar SNI 6197:2011. Penelitian ini bertujuan untuk mengoptimalkan efisiensi energi melalui penerapan teknologi Light Emitting Diode (LED) pada sistem pencahayaan industri. Pendekatan penelitian bersifat eksperimental-kuantitatif, dimulai dengan observasi lapangan, pengumpulan data teknis (daya, jam operasi, dan intensitas cahaya), analisis kondisi eksisting, serta perancangan sistem LED baru berdasarkan kebutuhan iluminansi dan efisiensi. Analisis komparatif dilakukan untuk mengevaluasi kinerja energi, kualitas pencahayaan, serta aspek ekonomi antara sistem eksisting dan sistem LED. Hasil penelitian menunjukkan penurunan total daya dari 37,94 kW menjadi 21,42 kW, dengan peningkatan efikasi rata-rata dari 70 lm/W menjadi 132 lm/W. Sistem LED menghasilkan penghematan energi sebesar 43,5% dan penghematan biaya tahunan sekitar Rp 122.981.356, dengan estimasi payback period selama 2,3 tahun. Hasil ini membuktikan bahwa penerapan sistem pencahayaan LED dapat meningkatkan efisiensi energi, memperbaiki kualitas pencahayaan, serta memberikan dampak ekonomi dan lingkungan yang positif.
subject: Article
  topic: section
subject: Efisiensi Energi, Revitalisasi Sistem Pencahayaan, Teknologi LED, Penghematan Biaya, Konsumsi Daya.
  topic: keywords
creator: Muhammad Saddam Al-Haiqa
creator: Linda Faridah
rights: Copyright (c) 2026 ITP Press https://creativecommons.org/licenses/by-sa/4.0
date: 2026-02-01
publication date: 2026-02-01
doi: 10.21063/jtv.2026.4.1.%p

THE EFFECT OF ALTITUDE AND SPEED OF QUADCOPTER DRONES ON THE ACCURACY OF WEATHER DATA MEASUREMENTS BASED ON ANEMOMETER SENSORS
type: item
description: The use of drones as a weather monitoring system has seen significant progress, particularly in reaching difficult-to-access areas and collecting real-time atmospheric data. This study aims to analyze the effect of variations in drone altitude and flight speed on the accuracy of weather parameter measurements, such as temperature and wind speed, using an anemometer sensor. The experiment was conducted in an area located approximately 1,800 meters above sea level, by flying a quadcopter drone at altitudes of 50 m, 100 m, and 150 m above ground level. The results show that variations in flight speed affect the stability of wind measurements, while temperature shows high stability at various altitudes. This study confirms the potential of using UAVs to support direct weather observation systems as part of efficient disaster mitigation.
subject: Article
  topic: section
creator: Dasman Dasman
creator: Ilhamda Ilhamda
creator: Robby Alpajri
creator: Al Al
creator: Aswir Premadi
rights: Copyright (c) 2025 ITP Press https://creativecommons.org/licenses/by-sa/4.0
date: 2025-08-01
publication date: 2025-08-01
starting page: 136
ending page: 140
doi: 10.21063/jtv.2025.3.2.136-140

FAILURE ANALYSIS OF CENTRIFUGAL PUMP (OVERHUNG 212–P17) USING FMEA METHOD AT PT KILANG PERTAMINA INTERNASIONAL RU II DUMAI
type: item
description: Centrifugal pumps are essential components in refinery processing systems, including those at PT Kilang Pertamina Internasional RU II Dumai. One of the pumps in operation, the overhung type 212–P17, has experienced a jammed condition affecting its performance. This study aims to analyze the potential failure modes of the pump components using the Failure Mode and Effect Analysis (FMEA) method and to determine corrective action priorities based on the Risk Priority Number (RPN). The analysis focused on four key factors: material integrity, shaft alignment, lubrication condition, and clearance. The results indicate that shaft misalignment had the highest RPN of 324, followed by lubrication failure with an RPN of 160. These findings suggest that corrective measures should prioritize shaft realignment and lubrication management. The FMEA approach has proven effective in identifying critical components and structuring a preventive maintenance strategy to enhance the operational reliability of the pump system.
subject: Article
  topic: section
subject: Pompa Sentrifugal, FMEA, Overhung, RPN, Ketidaksejajaran Poros, Pelumasan.
  topic: keywords
creator: Karnova Yanel
creator: Rozi Safery
creator: Ismet Eka Putra
rights: Copyright (c) 2025 ITP Press https://creativecommons.org/licenses/by-sa/4.0
date: 2025-08-02
publication date: 2025-08-02
starting page: 173
ending page: 178
doi: 10.21063/jtv.2025.3.2.173-178

HEXACOPTER CONTROL SYSTEM OPTIMIZATION
type: item
description: This study aims to develop and analyze the performance of a hexacopter control system used in weather modification technology missions. Several control methods are applied, including PID, Fuzzy Mamdani, Fuzzy Sugeno, and Model Reference Adaptive Control (MRAC). The tests are conducted through simulations in MATLAB Simulink and Mission Planner, using step response parameters such as delay time, rise time, peak time, settling time, overshoot, and steady-state error as performance benchmarks. The results indicate that MRAC provides the most balanced performance in terms of speed and accuracy, Fuzzy Sugeno excels in response speed, while PID and Fuzzy Mamdani offer high stability.
subject: Article
  topic: section
creator: Al Al
creator: Febri Usmanto
creator: Aswir Premadi
creator: Asnal Effendi
creator: Antonov Bachtiar
rights: Copyright (c) 2025 ITP Press https://creativecommons.org/licenses/by-sa/4.0
date: 2025-08-02
publication date: 2025-08-02
starting page: 160
ending page: 172
doi: 10.21063/jtv.2025.3.2.160-172

LEAD ACID BATTERY DISCHARGING PROTECTION SYSTEM MANAGEMENT COULOMB COUNTING METHOD
type: item
description: Knowing the battery SoC is important in battery usage, especially in renewable energy systems, electric vehicles, portable electronic devices, and other applications that use batteries as a power source. By knowing the battery SoC, users can manage battery usage, estimate the remaining time before needing to recharge or replace it. The BMS must ensure an efficient way for charging and discharging procedures. In addition, the BMS must maintain the proper SOC so that battery life can be maximized. In this study, a BMS designed for discharging protection on a battery as an energy storage that works to provide electrical energy to an electric load in the form of an electric vehicle, in carrying out its duties the BMS controls the electrical voltage limit to turn off the active switch on the load. The battery used is a Lead-Acid 12 V / 7.2 Ah, the C-rate used to serve the load of the battery discharging process is 0.15 C then the estimated battery capacity in an empty state is 6.4 Ah (SoC = 0%). The results of the study showed that the battery discharged for 6 hours and the cut-off voltage as protection was 10.6 Volts.
subject: Article
  topic: section
subject: Air Compressor
  topic: keywords
subject: Air Dryer
  topic: keywords
subject: Desiccant
  topic: keywords
creator: Hendi Matalata
creator: Noviardi Noviardi
creator: Leily W Johar
rights: Copyright (c) 2025 ITP Press https://creativecommons.org/licenses/by-sa/4.0
date: 2025-08-02
publication date: 2025-08-02
starting page: 179
ending page: 184
doi: 10.21063/jtv.2025.3.2.179-184

DESIGN AND CONSTRUCTION OF A PALLETIZING AUTOMATION SYSTEM USING AN OBJECT-ORIENTED INDUSTRIAL PROGRAMMING MODEL
type: item
description: The increasing demand for electrical energy in Indonesia encourages the availability of a reliable, efficient and stable power distribution system, especially in maintaining voltage quality during the transmission to distribution process. One of the main challenges in the distribution system is the occurrence of voltage drops which if not controlled can reduce energy efficiency and damage electrical equipment. In overcoming these problems, this research applies the Artificial Neural Network (ANN) method based on the backpropagation algorithm as an alternative approach in analyzing and predicting voltage drops in power distribution networks. Simulations were conducted using MATLAB R2024b software with input variables in the form of voltage, power factor, conductor length and diameter, cable type resistance, reactance, and load current. Meanwhile, the output variable analyzed is voltage drop. The simulation results show that the ANN model has a high predictive ability indicated by the Mean Square Error (MSE) value of 0.012743, Root Mean Square Error (RMSE) of 0.11289, Mean Absolute Error (MAE) of 0.033586, and Mean Absolute Percentage Error (MAPE) of 6.4292 %. This low error value indicates that the ANN is able to recognize complex patterns between input variables and provide adaptive responses to various variations in distribution system conditions so that the application of ANN using the backpropagation algorithm proves effective and efficient as a tool in supporting the technical decision-making process.
subject: Article
  topic: section
creator: Adrian Isna Izzulhaq
creator: Maun Budiyanto
rights: Copyright (c) 2025 ITP Press https://creativecommons.org/licenses/by-sa/4.0
date: 2025-07-31
publication date: 2025-07-31
starting page: 185
ending page: 194
doi: 10.21063/jtv.2025.3.2.185-194

THE EFFECT OF AGGREGATE GRADATION ON THE CHARACTERISTICS OF AC-WC HOT ASPHALT MIXTURE BASED ON MARSHALL TESTING
type: item
description: The development of quality road infrastructure is a key factor in supporting economic growth and inter-regional connectivity. This study aims to analyze the basic characteristics of aggregates and the effect of variations in size and distribution of aggregates on the performance of hot asphalt mixes. Fine and coarse aggregate samples were obtained from two quarry locations, namely Batang Atokan (Pasaman) and Gunung Nago (Padang), by testing using the Marshall method. The results showed that the aggregate from Sungai Atokan Quarry had the highest maximum stability of 1440.99 kg at 5% asphalt content, and showed the highest Marshall Quotient (MQ) value of 371.66 kg/mm. In contrast, Gunung Nago Quarry achieved the highest stability of 1211.93 kg at 7% asphalt content, but experienced a decrease in the VIM value below the specification limit at high asphalt content, indicating a risk of bleeding. The optimum asphalt content value for each quarry was 6.5% for Sungai Atokan and 6.0% for Gunung Nago. Comparative analysis shows that the mixture from the Atokan River Quarry is stiffer, more resistant to deformation, and suitable for heavy traffic, while the mixture from Mount Nago is more plastic and sensitive to excess asphalt content. The results of this study are expected to serve as a technical reference in aggregate selection and hot asphalt mix planning to improve road pavement quality in West Sumatra.
subject: Article
  topic: section
creator: Hendri Nofrianto
creator: Yogi Aprilio
creator: Mulyati Mulyati
rights: Copyright (c) 2025 ITP Press https://creativecommons.org/licenses/by-sa/4.0
date: 2025-08-01
publication date: 2025-08-01
starting page: 141
ending page: 153
doi: 10.21063/jtv.2025.3.2.141-153

REVIEW OF SOLAR ADSORPTION COOLING SYSTEM
type: item
description: The primary aim of this paper is to offer key insights into solar energy and waste heat adsorption cooling systems, as well as to present a helpful approach concerning the design aspects of the adsorbent bed utilized in adsorption cooling. In recent decades, solar-powered water purifiers have primarily been utilized for heating water in residential settings. In contrast, solar cooling systems have mainly been designed for demonstration purposes. It indicates that absorption cooling systems are better suited for large buildings, while adsorption cooling systems show greater promise for smaller air conditioning units. It is advised to plan solar-powered systems in public facilities. Highly efficient heat pumps are regarded as the best supplementary heat providers since they can operate independently of weather conditions.
subject: Article
  topic: section
creator: Arfidian Rachman
creator: Arfita Yuana Dewi
creator: Asnal Effendi
rights: Copyright (c) 2025 ITP Press https://creativecommons.org/licenses/by-sa/4.0
date: 2025-08-02
publication date: 2025-08-02
starting page: 154
ending page: 159
doi: 10.21063/jtv.2025.3.2.154-159

THE EFFECT OF ADDING GLASS FILM TO THE SURFACE OF A SOLAR PANEL ON EFFICIENCY AND POWER
type: item
description: This study is an experimental research that investigates the effect of varying solar panel tilt angles (180°, 15°, 30°) and adding an 80% darkness level glass film layer on power and efficiency. The study compares the results with and without the glass film for each tilt angle. The research methodology employed includes literature review and experimental development. The literature review provides a foundation for understanding the fundamental theories of solar panels, their working principles, and the impact of tilt angle on power and electrical efficiency. The results indicate that the tilt angle of solar panels significantly affects power and efficiency. The solar radiation received per unit area for each tilt angle (180°, 30°, 15°) is 920.3 W/m², 1002 W/m², and 1092.5 W/m² at 10:00 WIB, respectively, with the highest radiation observed at a 15° tilt angle. The power input to the solar panel without glass film for each tilt angle (180°, 30°, 15°) is 635 watts, 691.38 watts, and 753.82 watts at 10:00 WIB, respectively, with the highest power recorded at a 15° tilt angle. The efficiency of the solar panel without glass film for each tilt angle (180°, 30°, 15°) is 50.29%, 46.96%, and 53.46% at 14:00 WIB, respectively, with the highest efficiency achieved at a 15° tilt angle
subject: Article
  topic: section
creator: Marfizal Marfizal
creator: Sufiyanto Sufiyanto
creator: Dedi Wardianto
creator: M. Tesar Hadiansah
rights: Copyright (c) 2025 ITP Press https://creativecommons.org/licenses/by-sa/4.0
date: 2025-08-01
publication date: 2025-08-01
starting page: 122
ending page: 135
doi: 10.21063/jtv.2025.3.2.122-135

ANALYSIS OF THE EFFECT OF GAS SEPARATOR SENSITIVITY ON ESP PUMP OPTIMIZATION IN HANDLING GAS LOCK IN GASSY WELLS USING PROSPER V11 SOFTWARE SIMULATOR
type: item
description: Gas lock is defined as a fluid flow problem where the flow is blocked by a gas phase, inhibiting the production flow rate. This occurs due to the release of free gas in oil with a high gas-oil ratio (GOR). This condition arises when the pump intake pressure (PIP) or fluid over pump (FOP) is lower than the bubble point pressure (Pb) of the oil. Initial indications of free gas formation can be observed from erratic amp-chart readings, high annulus pressure, and the pump operating below its efficiency. To address gas lock issues in ESP pumps, additional equipment such as a gas separator can be installed below the surface, and PIP should be maintained above the Pb. The installation of a gas separator in the pump helps reduce the entry of free gas into the pump, while free gas is discharged into the annulus casing. In this thesis, the researcher uses a case study on a producing well with high GOR values of 100 mscf/day, a design rate of 850 BFPD, and a pump intake pressure (PIP) higher than the well's bubble point pressure (Pb) at 150 psi. Based on data processing using Prosper V11 software, the ESP pump in well Y was replaced from a REDA DN1300 to a REDA DN1100, resulting in a gas separator sensitivity value of 89%. The best pump efficiency achieved was 62%, and the optimal production rate obtained was 1330 RB/day.
subject: Article
  topic: section
creator: Richa Melysa
creator: Taufik Alexander Siregar
creator: Dedi Wardianto
creator: Irwan Anwar
rights: Copyright (c) 2025 ITP Press https://creativecommons.org/licenses/by-sa/4.0
date: 2025-07-31
publication date: 2025-07-31
starting page: 195
ending page: 203
doi: 10.21063/jtv.2025.3.2.195-203

INCREASED PROPERTIES OF VITRIFIED GLASS-CERAMICS FLY ASH WITH THE ADDITION OF 30 WT.% ALUMINUM SILICATE AND SINTERING TEMPERATURE
type: item
description: This study investigates the effects of adding 30 wt.% aluminum silicate and varying sintering temperatures on the density and hardness of vitrified fly ash glass ceramics. Fly ash, a waste by product from coal combustion at the Suralaya thermal power plant has long posed environmental challenges. To mitigate these impacts, this research explores its utilization in producing glass ceramics. The samples were prepared as cylindrical samples with a diameter of 15 mm and thickness of 5 mm, and were fabricated using uniaxial pressing at 120 MPa. The samples were sintered at 1050, 1100, and 1150 °C with a heating rate of 5 °C/min. Experimental results reveal that adding 30 wt.% AS significantly improves the density from 2.31 to 2.51 g/cm³ and hardness from 443 to 2418.55 MPa compared to 100 wt.% fly ash. Optimal density and hardness were achieved at a sintering temperature of 1150 °C.
subject: Article
  topic: section
subject: Vitrification
  topic: keywords
subject: Fly Ash
  topic: keywords
subject: Aluminum Silicate
  topic: keywords
subject: Glass-Ceramics
  topic: keywords
subject: Sintering
  topic: keywords
subject: Density
  topic: keywords
subject: Hardness
  topic: keywords
creator: Nurzal Nurzal
creator: Putri Pratiwi
creator: Nofriady Handra
creator: Mastariyanto Perdana
creator: Hafni Hafni
rights: Copyright (c) 2025 ITP Press https://creativecommons.org/licenses/by-nc-sa/4.0
date: 2025-01-21
publication date: 2025-01-21
starting page: 116
ending page: 121
doi: 10.21063/jtv.2025.3.1.116-121

THE EFFECT OF VARIATIONS OF CaCo3 ON ACTIVATED CHARCOAL IN THE PACK CARBURIZING PROCESS ON INCREASING THE HARDNESS OF LOW CARBON STEEL VIEWED FROM MICRO STRUCTURE AND HARDNESS
type: item
description: Because of its soft, ductile and easy-to-work nature, steel is widely used as a material in making a product. To obtain hard properties on the surface and remain soft at the core, a surface hardening process is carried out, so that the product can function according to its design objectives. One way to do this surface hardening is with solid carbon media or pack carburizing. To carry out this carburizing process, a furnace is required that is designed to be heat resistant and easy to operate. safe with coal fuel. for the furnace tester that has been designed, testing was carried out on low carbon steel using 1000 grams of activated charcoal carburization media with variations: 200 grams, 100 grams, 66.7 grams of Calcium carbonate (CaCo3) at a heating temperature of 950 0C and a holding time of 4 hours. Then continued with the quenching process. The test results show that the test material with a composition of 1000 grams of activated charcoal with 200 grams of calcium carbonate is better with the addition of carbon elements so that when quenching is carried out, a martensite microstructure is formed.
subject: Article
  topic: section
subject: Composition of activated charcoal and CaCo3
  topic: keywords
subject: Temperature
  topic: keywords
subject: Holding Time
  topic: keywords
creator: Hafni Hafni
rights: Copyright (c) 2025 ITP Press https://creativecommons.org/licenses/by-nc-sa/4.0
date: 2025-01-21
publication date: 2025-01-21
starting page: 108
ending page: 115
doi: 10.21063/jtv.2025.3.1.108-115

NUMERICAL STUDY OF 3D FLOW INTERACTION OF AIRFOIL AND FLAT PLATE
type: item
description: The effect of secondary flows in the wing-body configuration on aircraft—that is, the presence of wingtip-vortex on the tip region and the creation of multiple elements of the vortex flow on the endwall region—is the basis for studies of the existence of these secondary flow structures. These two factors combined will obstruct the main flow. The presence of this blocking effect will have an impact on the lift and drag aerodynamics, which directly impacts the wing's efficacy and efficiency. The saddle point's position shifting toward the pressure side is a phenomenon that can be seen in the endwall area. On the other hand, the area of maximum pressure on the lower surface travels towards the press side, and the movement of the minimum pressure point on the upper surface is found to be closer to the leading edge based on the isobar contour. The study will be carried out experimentally on a flat plate model with a wing shape change with an angle of attack variation (α) = 0o.
subject: Article
  topic: section
subject: Numerical Simulation
  topic: keywords
subject: CFD
  topic: keywords
subject: Secondary Flow
  topic: keywords
subject: Airfoil
  topic: keywords
subject: Endwall
  topic: keywords
creator: Arfidian Rachman
creator: Arfirta Yuana Dewi
creator: Asnal Effendi
rights: Copyright (c) 2025 ITP Press https://creativecommons.org/licenses/by-nc-sa/4.0
date: 2025-01-17
publication date: 2025-01-17
starting page: 101
ending page: 107
doi: 10.21063/jtv.2025.3.1.101-107

STUDY OF DISTRIBUTION TRANSFORMER INTERRUPTION ON 20 KV DISTRIBUTION NETWORK AT PT PLN (PERSERO) RAYON NATAR
type: item
description: The use of distribution transformers has a very important role in the distribution of electrical energy in a distribution system. The transformer used must be maintained properly so that its reliability is maintained stable, so as to avoid the form of interference. If a disturbance occurs, it will result in a break in the continuity of electricity distribution to consumers and also losses for consumers and PLN itself. Some disturbances that often occur are due to overloads, unbalanced loads, lightning strikes and internal disturbances in the transformer (disturbances originating from the transformer itself). Through this research, a case study will be taken on the 20 kV distribution network at PT PLN (Persero) Rayon Natar. Keywords : Distribution System, Transformer, PLN, Rayon Natar
subject: Article
  topic: section
creator: Siti Khalifah K
creator: Nambi Anasta
rights: Copyright (c) 2025 ITP Press https://creativecommons.org/licenses/by-nc-sa/4.0
date: 2025-01-17
publication date: 2025-01-17
starting page: 96
ending page: 100
doi: 10.21063/jtv.2025.3.1.96-100

DESIGN OF A HEXACOPTER CONTROL SYSTEM USING FUZZY LOGIC CONTROL
type: item
description: The development of hexacopters has progressed significantly in both hardware and software, leading to increased complexity. Despite these advancements, several challenges remain. The nonlinear, multivariable, and dynamic nature of hexacopter systems often results in flight instability, suboptimal precision in movements, and reduced flight duration. To address these issues, this study proposes the implementation of a fuzzy logic control (FLC) system to enhance the performance and stability of hexacopters during flight. The control system aims to minimize rise time, settling time, and overshoot. The research methodology involves developing a mathematical model of the open-loop system using the System Identification Toolbox in MATLAB, optimizing PID values through the PID Tuner, and designing the fuzzy control system based on error and delta error. The open-loop system demonstrates performance metrics of rise time (Tr) 4.60 s, delay time (Td) 2.76 s, peak time (Tp) 6.50 s, settling time (Ts) 5.91 s, and overshoot (Mp) 1.29%. With PID control, the performance improves to rise time (Tr) 3.24 s, delay time (Td) 1.85 s, peak time (Tp) 10.00 s, settling time (Ts) 9.55 s, and overshoot (Mp) 0%. Furthermore, the fuzzy logic controller achieves superior results with rise time (Tr) 3.19 s, delay time (Td) 1.53 s, peak time (Tp) 4.64 s, settling time (Ts) 3.37 s, and overshoot (Mp) 0%.
subject: Article
  topic: section
subject: Hexacopter
  topic: keywords
subject: PID
  topic: keywords
subject: Fuzzy Logic Controller
  topic: keywords
subject: Stability Control
  topic: keywords
subject: Flight Performance
  topic: keywords
subject: Control System Optimization
  topic: keywords
creator: Al Al
creator: Arifwindi Saputra
creator: Aswir Premadi
creator: Asnal Effendi
creator: Dasman Dasman
rights: Copyright (c) 2025 ITP Press https://creativecommons.org/licenses/by-nc-sa/4.0
date: 2025-01-15
publication date: 2025-01-15
starting page: 87
ending page: 95
doi: 10.21063/jtv.2025.3.1.87-95

ENHANCING VOLTAGE STABILITY AND ENERGY OUTPUT OF PLTM SALIDO IN THE PLN DISTRIBUTION NETWORK
type: item
description: Distributed generation (DG) integration in PLN’s extended distribution network often encounters voltage instability issues due to high voltage drops. These challenges restrict power delivery and can lead to disconnection, particularly during peak load conditions. This study investigates methods to enhance voltage stability and optimize the energy output of PLTM Salido. Using ETAP Power Station software, various operational schemes were simulated to address the problem of low terminal voltage. The study focused on the impact of reactive power injection and governor settings optimization to maintain generator performance under high demand. Results indicate that reactive power injection significantly improves terminal voltage, ensuring continuous power delivery. Adding a third generator unit further increased energy supply capacity, leveraging the full potential of available hydropower. The optimized operation of PLTM Salido with two generators increased daily energy output by 32.2%, while introducing a third generator boosted energy delivery by 107%. This research highlights the critical role of reactive power management and system configuration in enhancing the performance of small-scale hydropower plants in rural distribution networks.
subject: Article
  topic: section
subject: Voltage Stability
  topic: keywords
subject: Hydropower Optimization
  topic: keywords
subject: Reactive Power
  topic: keywords
subject: Distributed Generation
  topic: keywords
subject: Renewable Energy
  topic: keywords
creator: Alfith Alfith
creator: Rani Indriani
creator: Sepannur Bandri
rights: Copyright (c) 2025 ITP Press https://creativecommons.org/licenses/by-nc-sa/4.0
date: 2025-01-14
publication date: 2025-01-14
starting page: 79
ending page: 86
doi: 10.21063/jtv.2025.3.1.79-86

MAKING HOLLOW PAVING BLOCKS USING UNIFORMLY GRADED AGGREGATE
type: item
description: Pervious paving blocks are type of concrete brick (paving block) that is designed with pervious or gaps in the interior which become water absorption pathway into the soil, thereby helping reduce waterlongging and supporting a natural drainage system. This research aims to obtain compressive strength values and maximize the infiltration rates of perforated paving bocks using uniformly graded aggregates. The coarse aggregate used is split sizes 2-10 mm 1nd 10-20 mm with a mixture ratio of 1 Pc : 2 Split, 1 Pc : 3 Split, and 1 Pc : 4 Split. The paving block test object uses a rectangular mold with dimensions of 20 cm x 10 cm x 6 cm. Tests carried out on paving block test specimens were compressive strength and infiltration rate at the age of the test object of 28 days. Test results for compressive strength and infiltration rate of paving block specimens using a 5-10 mm split for a ratio of 1:2, 1:3, and 1:4 respectively, the compressive strength was 14.50 MPa; 8.17 MPa; 5.33 MPa, and an infiltration rate of 3.16 mm/s; 6.15 mm/s; 8,61 mm/sec, and using a split 0f 10-20 mm for a ratio of 1:2, 1:3, and 1:4 respectively, the compressive strength is 21.83 MPa; 10.87 MPa, 7.30 MPa, and an infiltration rate of 4.04 mm/s; 7.18 mm/s; 10.04 mm/sec. Using a larger uniformly graded aggregate size can increase the compressive strength and maximize the infiltration rate of paving block. The mixture ratio using more uniformly graded aggregate can increase the infiltration rate but decrease the compressive strength of the paving block. Keywords: Compressive Strength, Infiltration Rate, Hollow Paving Blocks, Uniformly Graded Aggregate, Mix Ratio, Continuous Drainage
subject: Article
  topic: section
subject: Compressive Strength
  topic: keywords
subject: Infiltration Rate
  topic: keywords
subject: Hollow Paving Blocks
  topic: keywords
subject: Uniformly Graded Aggregate
  topic: keywords
subject: Mix Ratio
  topic: keywords
subject: Continuous Drainage
  topic: keywords
creator: Mulyati Mulyati
creator: Misbah Misbah
creator: Dymas Aryf Prasetyo
rights: Copyright (c) 2025 ITP Press https://creativecommons.org/licenses/by-nc-sa/4.0
date: 2025-01-12
publication date: 2025-01-12
starting page: 72
ending page: 78
doi: 10.21063/jtv.2025.3.1.72-78

GUIDANCE IN QUALITY PAVING BLOCK PRODUCTION AT SMALL INDUSTRY UD. SAFIRA TARASO
type: item
description: Small industry UD. Safira Taraso produces paving blocks with various types and types of compressive strength, the most ordered by consumers are the quality of K-250 kg / cm2 and K-225 kg / cm2. Good quality paving blocks have a compressive strength value according to plan and are less than 10% of the absorption value according to SNI 03 - 0691 - 1996. The compressive strength test of paving blocks produced by UD Safira Taraso obtained 139.4 kg / cm2 (11.57 mpa) for the quality of K-225 kg / cm2 and a compressive strength value of 140.6 kg / cm2` (11.67 mpa) for K-250 kg / cm2. Paving block material consists of a mixture of cement, sand, crushed stone, stone ash and water. This material is obtained from the industry and standard testing is carried out in the Teknologi Beton laboratory of Bung Hatta University. This PKM aims to provide assistance and training in the production of paving blocks from the results of the mixture design in the laboratory for the two compressive strengths above. The K250 kg/cm2 mixture design obtained 103 paving blocks with materials of 1 sack of cement, 30.7 kg of sand, 62.1 kg of crushed stone, 63.6 kg of fly ash and 22.3 liters of water. The K225 kg/cm2 mixture design obtained 117 paving blocks with materials of 1 sack of cement, 64 kg of sand, 34 kg of crushed stone, 66.8 kg of fly ash and 28 liters of water. The results of the material mixture design obtained were carried out training and mentoring at the small industry UD. Safira Taraso. Keywords: Pavingblock, Mentoring, Compressive Strength, K225, K250
subject: Article
  topic: section
subject: Pavingblock
  topic: keywords
subject: Mentoring
  topic: keywords
subject: Compressive Strength
  topic: keywords
subject: K225
  topic: keywords
subject: K250
  topic: keywords
creator: Afrizal Naumar
creator: Desy Aryanti
creator: Evince Oktarina
creator: Luthfithary Auriellia Riafdy
creator: Moh.Wal Aqdi Afrul
creator: Irwandi Rinaldi
rights: Copyright (c) 2025 ITP Press https://creativecommons.org/licenses/by-nc-sa/4.0
date: 2025-01-11
publication date: 2025-01-11
starting page: 64
ending page: 71
doi: 10.21063/jtv.2025.3.1.64-71

CREATION OF FISH PELLET MAKING MACHINE DRIVE SYSTEM
type: item
description: The fisheries industry is one of the important sectors in the Indonesian economy. One crucial aspect in fish farming is the provision of high-quality and continuous feed. Fish pellets are the main choice because of their balanced nutritional content and ease of use. So far, fish pellets available on the market are often imported from large producers who dominate the market. Therefore, an alternative solution is needed that allows farmers to produce their own fish pellets with reliable quality and more economical costs. The creation of a drive system on a fish pellet molding machine is an effort to increase the efficiency of producing quality and affordable fish feed. The working principle of this drive system uses a mechanical energy conversion mechanism from an electric motor to the grinding and molding components. The electric motor functions as the main source of power, which is then transmitted through a gear or belt system to the grinding section to crush raw materials and mold pellets according to the desired size. The process of making the drive system involves calculating the engine pulley rotation of 1400 rpm while the driven pulley rotation is 437.5 rpm, the belt speed is 464 cm / s and the torque is 1,660.80 kg.mm. The test results show that the machine is capable of producing pellets after 3 tests with variations in the weight of the pellet raw materials, the results of the first test were 15.65 kg/hour, the second test 26.47 kg/hour and the third 26.67 kg/hour and the average result was 68.79 kg/hour.
subject: Article
  topic: section
subject: Pellets
  topic: keywords
subject: Drive System
  topic: keywords
subject: Test Results
  topic: keywords
creator: Muhammad Habib Ramadhan
creator: Sulaiman Sulaiman
creator: Ismet Eka Putra
rights: Copyright (c) 2025 ITP Press https://creativecommons.org/licenses/by-nc-sa/4.0
date: 2025-01-07
publication date: 2025-01-07
starting page: 57
ending page: 63
doi: 10.21063/jtv.2025.3.1.57-63

ANALYSIS OF PHOTOVOLTAIC ENERGY PRODUCTION AS AN ELECTRIC CAR CHARGING INFRASTRUCTURE AT THE MUARO JAMBI DPRD OFFICE
type: item
description: The automotive sector is very important to achieve net zero global emissions to limit global warming because 65% to 80% of the emissions produced come from exhaust and indirect emissions come from fuel. In 2050, the volume of oil production is expected to fall by 55% and gas by 70% and coal will no longer be produced. For this reason, regional governments, especially Jambi province, can be pioneers in preparing to use electric vehicles, starting with the use of official cars in every government agency. Muaro Jambi Regency (Sengeti) is 30.4 km from Jambi City, where the average government employee lives in Jambi City and uses fossil fuel official cars every day. This is of course a long-term global energy security problem. In this research, data analysis was carried out regarding solar radiation and energy production of Photovoltaic (PV) systems using the Photovoltaic Geographical Information System (PVGIS) web application located at the Muaro Jambi DPRD office where the data was used as charging infrastructure for 1 electric car in one trip. . From the research results, there is potential for Photovoltaic (PV) system energy as infrastructure for charging electric cars and allows for 2 units of electric cars with the same specifications, because there is an average energy per day that is not captured at 5512.2 Wh.
subject: Article
  topic: section
subject: Electric Cars
  topic: keywords
subject: Photovoltaic
  topic: keywords
subject: Infrastructure
  topic: keywords
subject: Environmentally Friendly
  topic: keywords
creator: Hendi Matalata
creator: Leily Wustha Johar
creator: Didik Yulianto
creator: Riki Sahputra
creator: Rioni Rizki Aldiansyah
rights: Copyright (c) 2025 ITP Press https://creativecommons.org/licenses/by-nc-sa/4.0
date: 2025-01-04
publication date: 2025-01-04
starting page: 49
ending page: 56
doi: 10.21063/jtv.2025.3.1.49-56

CONSTRUCTION OF A GOODS ELEVATOR WITH A MANUAL PULLEY SYSTEM
type: item
description: An elevator, commonly referred to as a lift, is a lifting device frequently used in multi-story buildings to transport people or goods. In the context of this design, the objective is to develop an elevator for a two-story building with a height of 4 meters. The background of this project is to provide a practical and efficient elevator system for buildings that do not require high-capacity or complex machinery. The purpose of this design is to create an affordable and reliable manual pulley-based elevator system suitable for low-rise buildings. The methodology includes observation of existing elevator systems, the application of established design standards, and a thorough literature review. Based on these inputs, the elevator utilizes a manual pulley system with a maximum load capacity of 540 kg. The cabin, which accommodates four people, is lifted using six ropes of type 8x19 with a diameter of 13 mm. The cabin is guided by T90 rails and is equipped with a wedge-type safety gear system for enhanced security. The results of the design show that the system meets the required specifications for load capacity and safety, while remaining cost-effective and efficient for the intended application. In conclusion, this manual pulley elevator system is a feasible and practical solution for small to medium-sized buildings, offering both reliability and safety within a modest budget
subject: Article
  topic: section
subject: Lift
  topic: keywords
subject: Elevator
  topic: keywords
subject: Manual Pulley System
  topic: keywords
subject: Load Capacity
  topic: keywords
subject: Safety Gear
  topic: keywords
creator: Karnova Yanel
rights: Copyright (c) 2024 ITP Press https://creativecommons.org/licenses/by-nc-sa/4.0
date: 2024-12-31
publication date: 2024-12-31
starting page: 42
ending page: 48
doi: 10.21063/jtv.2025.3.1.42-48

ANALYSIS OF ELECTRICITY POTENTIAL WITH THE UTILIZATION OF BRINE WASTE HEAT WITH ORGANIC RANKINE CYCLE (ORC) IN THE X WELL OF THE SORIK MARAPI GEOTHERMAL FIELD
type: item
description: The residual brine heat in the Geothermal Power Plant (PLTP) has the potential to be utilized to generate electricity because it still has a fairly high temperature and pressure. The method of utilizing residual brine heat is by using the Organic Rankine Cycle (ORC) which can be used to utilize heat at low temperatures. The main parameter method measured is the pressure and temperature in the working fluid circulation, hot water circulation (brine), and cooling water circulation. The ORC system uses an evaporator component as a replacement for the generator or boiler system in the Rankine cycle. The ORC system utilizes low-temperature heat sources such as Internal Combustion Engine exhaust heat, solar heat, biomass and brine from geothermal power plants. At low temperatures, organic fluids have higher cycle efficiency than water. The mass rate value in this study was 13.63 kg/s. where the turbine work is 328.07 Kw and the condenser heat transfer rate is 113.40 kj/s. The pump work is 311.8544 Kw. And the rate of heat transfer in the evaporator has an efficiency of 4.93% where the heat absorbed by the evaporator is 129.6213 kj/s.
subject: Article
  topic: section
subject: Organic rankine cycle
  topic: keywords
subject: geothermal
  topic: keywords
subject: brine
  topic: keywords
subject: sorak marapi
  topic: keywords
creator: Richa Melysa
creator: Yenni Padilah
creator: Irwan Anwar
creator: Dedi Wardianto
creator: Afdal Afdal
rights: Copyright (c) 2024 ITP Press https://creativecommons.org/licenses/by-nc-sa/4.0
date: 2024-11-29
publication date: 2024-11-29
starting page: 35
ending page: 41
doi: 10.21063/jtv.2025.3.1.35-41

PUSHOVER ANALYSIS OF BLOCK B BUILDING, SAWAHLUNTO MARKET
type: item
description: Indonesia is a country with a high risk of earthquakes. Earthquake vibrations can cause ground shifts, which, in turn, affect building structures. To assess the level of risk for building damage, it is necessary to conduct a collapse scheme analysis and seismic performance evaluation of buildings. In this study, the author examined one of the earthquake-prone areas, Sawahlunto City, located in West Sumatra Province, Indonesia. The focus of the research is Block B of the Sawahlunto Market, a building that serves as a hub for community economic activities. The analysis employed is pushover analysis. The research methods include data collection, load calculations, 3D modeling, and static pushover analysis. Structural modeling was carried out using SAP2000 software. The structural performance level was evaluated based on SNI 1726-2019 and ATC-40 standards, and the mechanism of structural collapse was analyzed using plastic hinge formation. The analysis results show that the capacity curves in the X and Y directions have almost identical shapes, indicating that the structural stiffness along both axes is nearly the same. The performance points in the X and Y directions classify the building structure under the immediate occupancy category. This indicates that the building is highly capable of withstanding earthquakes with no significant damage.
subject: Article
  topic: section
subject: Pushover analysis
  topic: keywords
subject: earthquake
  topic: keywords
subject: capacity curve
  topic: keywords
subject: performance point
  topic: keywords
creator: Fajar Nugroho
creator: Reza Andrano
creator: Maizir Maizir
rights: Copyright (c) 2024 ITP Press https://creativecommons.org/licenses/by-nc-sa/4.0
date: 2024-11-22
publication date: 2024-11-22
starting page: 23
ending page: 34
doi: 10.21063/jtv.2025.3.1.23-34