Simulasi Pengaruh Inlet Air Cooling Wet Evaporative Media, High Pressure Fogging, Dan Mechanical Chiller (Water Chiller) Terhadap Performa Turbin Gas Pada Pltgu Menggunakan Software Cycle Tempo 5.0

Nainggolan, Robinsar Reynaldo Joseph (2021) Simulasi Pengaruh Inlet Air Cooling Wet Evaporative Media, High Pressure Fogging, Dan Mechanical Chiller (Water Chiller) Terhadap Performa Turbin Gas Pada Pltgu Menggunakan Software Cycle Tempo 5.0. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Penggunaan turbin gas sudah banyak diaplikasikan, salah satu contohnya adalah untuk memproduksi tenaga listrik. Pembangkit listrik tenaga gas mengaplikasikan siklus Brayton dalam pengoperasiannya. Dalam pengoperasiannya banyak faktor yang dapat mempengaruhi performa dari sistem turbin gas, salah satunya adalah temperatur udara ambient. Seiring meningkatnya temperatur udara maka densitas udara akan berkurang, dimana akan mengakibatkan turunnya laju aliran massa udara. Berkurangnya laju aliran massa udara mengakibatkan udara yang melewati turbin gas semakin mengecil dan menurunkan performa dari turbin gas. Salah satu cara yang dapat dilakukan untuk menaikkan performa dari sistem turbin gas adalah dengan metode inlet air cooling. Terdapat beberapa jenis dari metode inlet air cooling, yaitu wet evaporative media, pendinginan fogging, dan mechanical chiller (water chiller). Metode pendinginan udara masuk ini diharapkan dapat meningkatkan performa dari sistem turbin gas. Penelitian ini dilakukan dengan menggunakan aplikasi Cycle Tempo 5.0 untuk mensimulasikan pengaruh pendinginan udara inlet terhadap performa sistem turbin gas. Terdapat tiga jenis pendinginan udara inlet yang dibandingkan pada penelitian ini, yaitu wet evaporative media, pendinginan fogging, dan mechanical chiller (water chiller). Temperatur udara ambient divariasikan sesuai dengan data cuaca rata-rata daerah Gresik pada pukul 06.00, 12.00, dan 18.00 WIB. Simulasi dilakukan pada ketiga sistem pendinginan dengan permodelan yang telah dibuat pada Cycle Tempo 5.0 dengan data-data yang telah ditentukan. Dari hasil analisis didapatkan hasil bahwa sistem pendinginan udara inlet kompresor turbin gas dapat meningkatkan performa dari turbin gas. Didapatkan dari hasil variasi temperatur peningkatan output power dan efisiensi sistem sebesar 3,72% dan 1,029% untuk pendinginan wet evaporative media, 4,46% dan 1,22% untuk pendinginan pendinginan fogging, serta 7,8% dan 2,07% untuk pendinginan mechanical chiller (water chiller). Didapatkan sistem pendinginan mechanical chiller yang cocok digunakan pada PLTGU PJB UP Gresik Blok 1 untuk menaikan performa turbin gas. Dengan pengaruh auxiliary consumption masih didapatkan peningkatan output power dan efisiensi sebesar 2,07% dan 0,84%. ==================================================================================================================== The use of gas turbines has been widely used, and one of the examples is to produce electricity. Gas power plants apply the Brayton cycle in their operation. In the operation, there are many factors that can affect the performance of the gas turbine system, one of the examples is the ambient air temperature. As the air temperature increases, the air density will decrease, which resulting a decrease in the air mass flow rate. The reduced air mass flow rate causes the air that passing through the gas turbine become smaller and lowers the performance of the gas turbine. One of the ways that can be done to increase the performance of the gas turbine system is with inlet air cooling method. There are several types of inlet air cooling methods, namely wet evaporative media, fogging cooling, and mechanical chiller (water chiller). This inlet air cooling methods is expected to improve the performance of the gas turbine system. This research was conducted using software Cycle Tempo 5.0 to simulate the effect of inlet air cooling on the performance of the gas turbine system. There are three types of inlet air cooling that is being compared in this reseach, namely wet evaporative media, fogging cooling, and mechanical chiller (water chiller). Ambient air temperature was varied according to the average weather data for the Gresik area at 06.00, 12.00, and 18.00 WIB. Simulations are carried out on the three cooling systems with the modelling that has been made in Cycle Tempo 5.0 with predetermined data. The final result that is expected from this research is the performance of the three types of air cooling to reduce ambient air temperature, auxiliary consumption, and the effect of the three methods on the performance of the generator system with a gas turbine that is applied to each of the air cooling systems. From the result of the comparison, the air cooling method that is appropriate for use in PLTG will be obtained. From the results of the analysis, it is found that the gas turbine compressor inlet air cooling system can improve the performance of gas turbine. From the simulation results on temperature variations, can be found an increase in power output and average efficiency for 3.72% and 1.029% for wet evaporative media, 4.46% and 1.22% for fogging and 7.8% and 2.07% for mechanical chiller (water chiller). A mechanical chiller cooling system is obtained which is suitable for use in PLTGU PJB UP Gresik block 1 to increase gas turbine performance. With the influence of auxiliary consumption, an increase still happened in output power and efficiency of 2.07% and 0.84%.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Performa, Pendinginan, Turbin Gas, Daya, Performance, Cooling, Evaporative, Fogging, Chiller, Gas Turbine, Power
Subjects: T Technology > TJ Mechanical engineering and machinery
T Technology > TJ Mechanical engineering and machinery > TJ164 Power plants--Design and construction
T Technology > TJ Mechanical engineering and machinery > TJ254.7 Combustion chambers
T Technology > TJ Mechanical engineering and machinery > TJ265.E23 Thermodynamics.
T Technology > TJ Mechanical engineering and machinery > TJ778 Gas turbines
T Technology > TJ Mechanical engineering and machinery > TJ990 Compressors
Divisions: Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User: Robinsar Reynaldo Joseph Nainggolan
Date Deposited: 12 Aug 2021 06:20
Last Modified: 12 Aug 2021 06:20
URI: https://repository.its.ac.id/id/eprint/85579

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