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All Journal GEMA TEKNOLOGI Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Jurnal Pengabdian Vokasi Journal of Vocational Studies on Applied Research
Juli Mrihardjono
Program Studi S.Tr. Rekayasa Perancangan Mekanik, Sekolah Vokasi, Universitas Diponegoro
Aerospace Engineering Automotive Engineering Computer Science & IT Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mechanical Engineering

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Journal : Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi

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ANALISIS PERFORMANCE COOLING TOWER TIPE INDUCED DRAFT COUNTER FLOW PLTP KAMOJANG UNIT 5 Hasan Abdurohman; Juli Mrihardjono; Seno Darmanto
Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Vol 8, No 2 (2022): Oktober
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (26.898 KB) | DOI: 10.35308/jmkn.v8i2.6526

Abstract

Cooling tower is a heat exchanger used to cool water from the condenser. The process is carried out by contacting water with air directly and discharged into the atmosphere using air fluid that is flowed naturally or flowed by a fan. Cooling tower type used in PLTP Kamojang Unit 5 is Induced draft Counter Flow. This equipment more important in increasing turbine efficiency, therefore special treatment is needed by knowing and observing the performance of the Cooling tower so that it can be analyzed in actual conditions and make decision steps in carrying out further repairs and maintenance, this is the basis of research that will be carried out by looking for value and the Cooling tower performance trendline. The calculation method uses the standard ASME PTC 23-2003 and CTI ATC-105 where the results are the calculation baseline and the historical trendline of Cooling tower performance based on the parameters of the 3-cell Cooling tower operating conditions. The parameters tested are by taking 5 valid data on PLTP KMJ Unit 5, then the Tower Capability performance values are obtained as follows, namely in the initial commissioning conditions the performance value is 92,1%, Q1 2021 is 78,8%, Q3 2021 is 74, 3%, Q4 2021 is 84,7%, and Q1 2022 is 83,8%. There was a decrease in Q3 2021. Then there was an increase in the trend in Q4 2021 due to previous overhaul activities on the Cooling tower. Keywords: Cooling tower, trendline, overhaul, tower capability
UJI PERFORMA MESIN MENGGUNAKAN BAHAN BAKAR PERTAMAX DAN PERTAMAX TURBO PADA MESIN 4 LANGKAH ABDI MUHAMMAD CAHYA NEGARA; Ireng Sigit Atmanto; Juli Mrihardjono
Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Vol 9, No 1 (2023): April
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jmkn.v9i1.7096

Abstract

Performance and vehicle exhaust emissions are determined by many factors that come from various components and take place in a related manner. This test uses 4 types of motorcycles with different cylinder volumes. The test was conducted using a dynamometer test equipment. How to test on a dynamometer using fuel pertamax and Pertamax turbo. Data were taken on transmission gears 1, 2, 3 and 4 at speeds of 20 km, 40 km and 60 km. For emission testing follows the procedure of taking power and torque data and performed simultaneously.The content of emissions in the exhaust gas is CO, CO2, HC and O2 based on the results of the use of exhaust emissions test equipment.The relationship between vehicle speed and gear position to power, torque and exhaust emissions on 2 different fuels is the higher the transmission gear position and speed, the result is high, namely on pertamax fuel (power, torque, CO gas emissions) and pertamax turbo (Power, Torque, CO gas emissions, CO2 gas), the lower the transmission gear position and speed, the result is high, namely on pertamax fuel (CO2) and the lower the transmission gear position and speed, the result is high, namely HC on pertamax fuel and pertamax turbo.The test results of statistical tests t-test 2 samples obtained the results of the fuel test pertamax = Pertamax turbo fuel test on 4 vehicles with different cylinder volumes. Exceptions exist in 160 cylinder volume vehicles in the HC test and 125 cylinder volume vehicles in the CO2 test.
Co-Authors ABDI MUHAMMAD CAHYA NEGARA Didik Ariwibowo Dista Yoel Tadeus Hasan Abdurohman HERMAN ABIDIN POHAN Ireng Sigit Atmanto Mohamad Endy Y Yulianto Riana Sitawati Seno Darmanto Sutrisno Sutrisno Sutrisno, Sutrisno