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All Journal Dharma Raflesia : Jurnal Ilmiah Pengembangan dan Penerapan IPTEKS TEKNOSIA Jurnal Polimesin
Yovan Witanto
universitas bengkulu
Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation Other

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Journal : TEKNOSIA

 1 
ALIGNMENT POROS POMPA BENFIELD 1107-JB MENGGUNAKAN DIAL INDIKATOR DENGAN METODE RIM AND FACE Afif Chaniago Bastiar; Yovan Witanto; Dedi Suryadi
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.v17i1.28432

Abstract

Alignment is a process that aligns two shaft axes that are not straight to centric (between the driving shaft and the driven shaft axis). Correct alignment is needed so that the clutch run out check is correct, so that parallel misalignment and angular misalignment do not occur which caused the industry to lose billions of dollars. The purpose of this research is to analyze the alignment performance on the Benfield 1107 JB PT pump shaft. PUSRI to create the correct alignment. The method used in this study is a dial indicator with the face and rim method. The measuring instrument used is a Dial Indicator with a detailed accuracy of 0.01 mm with radial and axial measurements. The results show a different final value for each angle used. From the difference in values ​​obtained, namely in the radial direction the angle is 0o which is 0 mm, the 90o angle is 0.07 mm, the 180o angle is 0.14 mm, and the 270o angle is 0.07 mm, and the difference in value in the axial direction is the angle 0o is 0 mm, 90o angle of 0.01 mm, 180o angle of 0.01 mm, and 270o angle of 0 mm indicates that the 1107-JB Benfield Pump is ready to operate again on the P-IV Ammonia section.
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.
Co-Authors Afdhal Kurniawan Mainil Afif Chaniago Bastiar Agus Suandi Angky Puspawan Anizar Indriani Dedi Suryadi Helmizar - Hendra Hendra Khotso Sai Nurcholish Windiharto Rahmat Iman Mainil Rifki Sulthan