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All Journal Turbo : Jurnal Program Studi Teknik Mesin Jurnal Teknik Mesin Inersia : Jurnal Teknik Sipil Dharma Raflesia : Jurnal Ilmiah Pengembangan dan Penerapan IPTEKS Jurnal Riset Teknologi Pencegahan Pencemaran Industri TEKNOSIA Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Dharmakayana: Journal of scientists, engineers, educators and scientific activists related to society development
Angky Puspawan
Program Studi Teknik Mesin, Fakultas Teknik Universitas Bengkulu
Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation Other

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PELATIHAN PEMANFAATAN GAS LPG SEBAGAI BAHAN BAKAR ALTERNATIF GENSET UNTUK MASYARAKAT NELAYAN Yovan Witanto; Hendra Hendra; Angky Puspawan
DHARMA RAFLESIA Vol 15, No 1 (2017): JUNI
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/dr.v15i1.4237

Abstract

This community service aimed at improving the knowledge and skills of the fishermen community of Pantai Jakat Bengkulu city in using gas fuel converted from liquid fuel. The community service was conducted in the form of a traning. The activities involved the fishermen in installing the converter kit of a gas fuel; trying out the genset which used the gas fuel; and evaluating the performance of the genset. After the training, the participant were asked to give opinion about the possibility of using the converted gas in their day to day fishing activities. The results of the training showed that the fishermen have a positive responses toward the use of the gas fuel for the genset. However, they still have some worries toward the safety of using the converted gas fuel.  Keywords: Genset, Gas Fuel 
Analisa Head Losses dan Efisiensi Pompa Sentrifugal Vogel dari Instalasi Menara Pendingin ke Penampung Utama Angky Puspawan
Inersia: Jurnal Teknik Sipil Vol. 14 No. 2 (2022)
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/ijts.14.2.117-125

Abstract

Di pabrik industri bidang pengolahan dan pembuatan pupuk urea di Indonensia memerlukan bahan baku utama yaitu adalah gas alam cair (Liquid Natural Gas/LNG), air (H2O), dan udara (air). Ketiga bahan baku utama tersebut penting diolah dan menghasilkan nitrogen (N2), hidrogen (H2), dan karbondioksida (CO2). Amoniak (NH3) adalah hasil reaksi gas nitrogen (N2) dan hidrogen (H2). Selanjutnya proses berikutnya adalah mencampurkan amoniak (NH3) dengan karbondioksida (CO2) bereaksi dan menghasilkan pupuk urea. Pupuk urea sangat penting dalam membantu pertumbuhan tanaman dalam pengolahan pertanian dan perkebunan. Salah satu bahan baku utama adalah air (H2O). Oleh sebab itu, letak atau lokasi pabrik industri pupuk ini seyogyanya atau selayaknya harus mendekati sumber air baku yaitu air laut ataupun air sungai. Tujuan letak atau lokasi pabrik pupuk ini mendekati sumber air adalah agar kebutuhan air murni tetap kontinyu dan terjaga. Dikarenakan kebutuhan (demand) akan air sangat banyak, maka dibuatlah aliran air yang disesuaikan dengan kebutuhan dengan membangun stasiun pompa. Kebutuhan air yaitu untuk air pendingin kemudian dialirkan ke penampung utama untuk bahan baku pembuatan pupuk. Pompa digunakan sebagai alat untuk memindahkan fluida dari suatu tempat ke tempat lain melalui media pipa dengan terjadinya perubahan tekanan pada fluida. Pompa biasanya untuk fluida bersifat cair. Pada instalasi pompa dari instalasi menara pendingin menuju ke penampung utama adalah pompa sentrifugal vogel, dimana kerugian head pada jalur pipa sisi isap 0,044 m, kerugian head jalur pipa sisi keluar 0,761 m dengan total kerugian head 0,805 m dan efisiensi atau performa pompa sentripugal Vogel adalah 68,707%.
PENGARUH AIR FUEL RATIO (AFR) TERHADAP EFISIENSI TURBIN GAS PADA PLTGU UNIT 2 PT. PLN (PERSERO) KERAMASAN PALEMBANG-PROVINSI SUMATERA SELATAN Angky Puspawan; Rifki Sulthan; Agus Suandi; Yovan Witanto
Teknosia Vol. 17 No. 1 (2023): Juni 2023
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/teknosia.v17i1.28754

Abstract

Gas turbine efficiency is an indicator to determine the performance of a generator. The greater the efficiency value of the gas turbine in a generator, the better the performance of the generator. One of the things that affect the value of the efficiency of a gas turbine is the air fuel ratio. Air Fuel Ratio (AFR) is the ratio of the amount of air and fuel in the combustion process in units of mass or volume. Air fuel ratio is a factor that affects the perfection of the combustion process in the combustion chamber. In the graphic image it can be seen that the lowest AFR values ​​are on July 3 and 4 2022, when the gas turbine produces a loading of 20900 kW and 20100 kW with an AFR value of 39.76 unitless each. Whereas the highest AFR value is on June 28 2022 when the gas turbine produces a loading of 20780 kW with an AFR value of 40.68 unitless. The highest gas turbine efficiency value is on June 30, 2022, at a loading of 20,650 kW with a gas turbine efficiency of 83.3%. The lowest efficiency value is on July 2, 2022, at a load of 20,800 kW with a gas turbine efficiency of 81.05%. From the results of existing data processing and graphs, it can be seen that the value of the air fuel ratio and the efficiency of the gas turbine are inversely proportional, which means that when the value of the air fuel ratio decreases, the value of the efficiency of the gas turbine tends to increase. However, there are some deviations when the value of the air fuel ratio decreases, the efficiency of the gas turbine also decreases. Therefore it can be concluded that the value of the air fuel ratio affects the value of the efficiency of the gas turbine, however, the value of the air fuel ratio is not the only factor that affects the value of the efficiency of the gas turbine.
The Processing of LDPE Plastic Waste into Renewable Fuel Using Waste Motor Oil Alex Surapati; Angky Puspawan; Yanolanda Suzantry Handayani; Fitrilina
Jurnal Riset Teknologi Pencegahan Pencemaran Industri Vol. 14 (2023): special issue
Publisher : Balai Besar Standardisasi dan Pelayanan Jasa Pencegahan Pencemaran Industri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21771/jrtppi.2023.v14.no3.p12-20

Abstract

The increase in population causes an increasing amount of solid waste, especially plastic waste. Plastic waste that cannot be decomposed in nature increases its number and causes environmental pollution. The research aimed to process plastic waste into alternative fuel oil using waste motor oil. The research methods consisted of designing a plastic waste processing device using waste motor oil as fuel and testing the device with a plastic burning process using a processing machine. The plastic waste processing device was produced in the form of a stove that functions to heat plastic waste fueled by waste motor oil using an electric blower to generate pressure into the reactor. The heating process produces steam flowing and processing in a distillation tube to produce oil. The resulting temperature was 140oC and could melt plastic waste, but there were still burning residues. The distillation produced two types of fuel oil, yellow and black.
INHAUST AND EXHAUST VALVES GAP EFFECTS ON AN ENGINE PERFORMANCES Puspawan, Angky
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 3 No. 2 (2019): Oktober 2019
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v3i2.9855

Abstract

Valves is the part in an engine determining engine performance. The setting of the valves is to determine the composition of air and fuel in their combustion room. The mixing of the air and the fuel is the key of the engine performance. Dinamometer test was being conducted for the gap variation of the valves of 0.03 mm, 0.05 mm, and 0.07 mm each either for inhaust valve and exhaust one. The optimum of the engine performance of gasoline fuel as measured from the torque, the power, and the specific fuel consumption was at 0.05 mm of both.
STEAM TURBINE ISENTROPIC EFFICIENCY OF TC 663 MY 140 TYPE-UNIT 4 STEAM POWER PLANT CASE STUDY IN PT. PLN (PERSERO), BUKIT ASAM SECTOR, TANJUNG ENIM REGENCY, SOUTH SUMATERA PROVINCE Puspawan, Angky
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 3 No. 1 (2019): April 2019
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v3i1.9930

Abstract

Coal is one of the important natural resources that can produce energy for electricity generation. Bukit Asam Steam Power Plant (PLTU) PT. PLN (Persero) is a state-owned company that is in charge of managing coal into fuel to produce electricity through the Rankine cycle with one of its main tools being a steam turbine. Steam turbines function to convert heat energy from the boiler to mechanical energy to rotate the turbine. Because the heat energy has enough pressure, temperature, and flow of steam to rotate the turbine rotor. If a steam turbine is used continuously to reduce the quality and isentropic efficiency of the turbine. Therefore, it is necessary to do some work analysis on turbines type TC663 MY 140 Unit 4, Bukit Asam Sector PLTU. From observing and retrieving data and the results of calculating steam turbines during a two-day operation, the average value of isentropic efficiency on the first day was 57.86% with a range of 56.19% -59.92% and 54.51% on the second day 44.29% 59.58%.So,the pressure and temperature of the steam turbine greatly affect the performance of the steam turbine where if the pressure and the inlet temperature of the steam turbine are large then the work of the steam turbine increases and vice versa. From the results of calculations and discussion it can be concluded that the steam turbine used in PT. PLN (Persero) is still working well.
THE HEAT TRANSFER FLOW ANALYSIS OF STANDARD PLATE STELL OF JIS G3106 GRADE SM20B ON PRE-HEATING JOINT WEB PLATE I-GIRDER PROCESS CASE STUDY IN PT. BUKAKA TEKNIK UTAMA, BOGOR REGENCY, WEST JAVA PROVINCE Puspawan, Angky; Pangestu, Mirza Aditya; Suandi, Agus; Alqaf, A. Sofwan Furqon
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 4 No. 1 (2020): April 2020
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v4i1.13270

Abstract

PT. Bukaka Teknik Utama in working on government projects, namely the construction of the Jakarta-Cikampek elevated toll road, the focus of fabrication of steel plates. The steel plate fabrication process, there is a pre-heating process for two steel plates connected by SAW welding with the Joint Web Plate process. During the pre-heating process, conduction heat transfer takes place from the PWHT ceramic to the steel plate. To complete the calculation of the unstable conduction heat transfer two equations are used, namely the equation q transient conduction and q the capacity of the object. Both equations are substituted to get the value of time needed to heat a steel plate from 40oC to 99oC. After calculation and analysis, it can be concluded that the heating time of JIS G3106 Grade SM520B steel plate is directly proportional to the desired temperature. Where the higher the heating temperature is desired, the longer the heating time required to reach the heating temperature. The calculation results obtained the smallest heating time value is 28.695193 seconds at a temperature of 40oC and the largest heating time value is 790.858579 seconds at a temperature of 99oC.
Analisa Pengaruh Variasi Diameter Tabung dan Jarak Katup Buang Limbah terhadap Unjuk Kerja Sistem Pompa Hidrolik Ram [Pompa Hidram] Puspawan, Angky; Suandi, Agus; Witanto, Yovan; Putra, Shandy Tri
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 4 No. 2 (2020): Oktober 2020
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v4i2.18395

Abstract

Pompa hidram adalah salah satu jenis pompa yang energi atau tenaga penggeraknya berasal dari tekanan atau hantaman air yang masuk ke dalam pompa melalui pipa. Masuknya air yang berasal dari berbagai sumber air ke dalam pompa harus berjalan secara kontinyu. Pompa hidram memiliki banyak keuntungan dibandingkanpenggunaan jenis pompa air lainnya, diantaranya tidak membutuhkan pelumasan, bentuknya sangat sederhana, pembuatan dan pemeliharaanya lebih murah. Selain itu pompa ini mampu bekerja 24 jam per hari. Beberapa hal yang dapat mempengaruhi efisiensi pompa hidram ini, seperti tinggi masukan air, jarak katup buang limbah, dandiamater volume tabung. Pada penelitian ini diameter pipa yang digunakan adalah pipa diameter 2,5 inch, 3 inch, dan 4 inch dengan variasi volume tabung 0,0006 m3, 0,0013 m3, 0,0027 m3, dan 0,0040 m, pada jarak katup buang limbah divariasikan 50 mm, 75 mm, dan 100 mm, sedangkan tinggi masukan 1 meter. Dari hasilpengujian dan data hasil perhitungan didapat efisiensi maksimum 82,50% pada volume tabung 0,0027 m diameter pipa 4 inch, tinggi masukan air 1 meter, dan jarak katup buang 75 mm, sedangkan efisiensi terendah didapat pada volume tabung 0,0040 m3 diamater pipa 4 inch, pada jarak katup buang limbah 50 mm, dan tinggimasukan air 1 meter dengan nilai efisiensi 60,00%.
PERPINDAHAN PANAS PADA PIPA HEAT EXCHANGER DENGAN PIPA BERBAHAN KACA, TEMBAGA, DAN TEMBAGA YANG DILAPIS RESIN Nuramal, Agus; Puspawan, Angky; Pratama, Gilang Giyas
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 4 No. 2 (2020): Oktober 2020
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v4i2.18396

Abstract

In this study, a heat exchanger will be designed with the principle of tube-pond, normal water flowing tubes and hot water-filled ponds. This study aims to determine the heat transfer characteristics of glass pipe, copper, and resin coated copper.The materials used in the tube were glass, copper, and resin coated copper, polyester resin of yukalac BTQN 157 and a catalyst of methyl ethyl ketone peroxide. In the test, the water temperature variation in ponds was 70?C, 80?C, and 90?C. At each temperature, the test was carried out by flowing normal water into the tube by varying the discharge by 1lpm, 0.8lpm, 0.6lpm, 0.4lpm, and 0.2lpm. The values for the temperature in and out of the water in the tube are obtained. So that the overall heat transfer coefficient value and its effectiveness can be calculated.The results showed that the higher the discharge, the overall heat transfer coefficient on the tube increased. where the highest value is in the copper tube meterial at 1 lpm discharge, which is at 80?C pond temperature of 1544.163 W / m2?C. While the smallest value of the overall heat transfer coefficient is the glassmaterial at the time of discharge 0.2 lpm, which is at a temperature of 90?C of 199.5889 W / m2?C
THE HEAT TRANSFER FLOW ANALYSIS OF THE JIS G 3106 SM520B STEEL PLATE CUTTING PROCESS USING CNC FLAME CUTTING MACHINE IN THE MANUFACTURE OF THE BOTTOM PLATE BOX GIRDER Puspawan, Angky; Febriansyah, Febriansyah; Suandi, Agus; Supardi, Nuruliman
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 5 No. 1 (2021): April 2021
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v5i1.20148

Abstract

PT. XYZ uses CNC flame cutting technology to produce steel bridge material with the principle of thermal cutting which will cause the phenomenon of heat transfer and heat affected areas. By using the inverse method to determine the application of heat on the SM520B steel plate. The JIS G3106 SM520B steel plate is formed from a Heat Affected Area (HAZ). This happens because of differences in cutting temperature and the temperature of the Steel Plate. The analysis results obtained from conformity with the Box Girder design. In the Box Girder design, the active load is given a distance of 60 mm from the heat- area affected so as not to fatigue.
Co-Authors Afdhal Kuniawan Mainil Agus Nuramal Agus Nuramal Agus Suandi Agus Suandi Agus Suandi, Agus Alqaf, A. Sofwan Furqon AM Saifutaqi Fatwa Mayfi Anugrah, Dwi Permana Aziz Masyhuri Budiman, Arif Adtyas Falah, Sabilul Febriansyah Febriansyah Fepy Supriani Fitrilina Ginting, Zefanya Karsten Gunawan, Agustin Hadi Susanto, Tri Nugroho Hardiansyah Helmizar Helmizar - Hendi Gunawan Hendra Hendra Hendri Hestiawan Hendri Hestiawan Khairul Amri Makmun Reza Razali Mubarok, Abdul Latif Nopriani, Meti Eliza Nurul Iman Supardi Nurul Iman Supardi Ompusunggu, Ferdinand Lincoln Pangestu, Mirza Aditya Pratama, Gilang Giyas Putra, Shandy Tri Rifki Sulthan Rifki Sulthan Saputra, Andrian Nurul Sulthan, Rifki SUPARDI, NURULIMAN Surapati, Alex Yanolanda Suzantry Handayani Yovan Witanto Yovan Witanto Yovan Witanto Yueprayuga, Abie