Simulasi Pengaruh Penurunan Temperatur Udara Masuk Kompresor Terhadap Kinerja Turbin Gas Menggunakan Software Cycle-Tempo

Khairunnisa, Nabila (2026) Simulasi Pengaruh Penurunan Temperatur Udara Masuk Kompresor Terhadap Kinerja Turbin Gas Menggunakan Software Cycle-Tempo. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Kinerja turbin gas pada Pembangkit Listrik Tenaga Gas dan Uap (PLTGU) sangat dipengaruhi oleh kondisi udara lingkungan. Peningkatan temperatur ambien dapat menurunkan densitas udara sehingga laju aliran massa udara masuk kompresor berkurang dan berdampak pada penurunan daya keluaran serta efisiensi sistem turbin gas. Salah satu upaya peningkatan performa adalah menerapkan inlet air cooling (IAC) sebelum kompresor. Penelitian ini bertujuan untuk menganalisis pengaruh penerapan IAC menggunakan metode Wet Media Evaporative dan High-Pressure Fogging terhadap kinerja sistem turbin gas PLTGU pada beban 100%, 75% dan 50%. Metode penelitian dilakukan melalui studi literatur dan observasi lapangan, pengumpulan data dan analisis psikrometrik untuk menentukan perubahan properti udara akibat pendinginan, kemudian simulasi menggunakan software Cycle-Tempo. Model dibuat pada kondisi existing serta dengan Wet Media Evaportaive dan High-Pressure Fogging. Simulasi divalidasi dengan perhitungan teoretis, kemudian dianalisis pengaruhnya terhadap kinerja turbin gas pada setiap tingkat beban. Setelah penerapan IAC, metode Wet Media Evaporative mampu menurunkan temperatur udara ambien menjadi 28.12°C, 26.14°C, dan 23.35°C, meningkatkan Net Power sebesar 4.4%, 3.65%, 3.03%, meningkatkan Thermal efficiency menjadi 31.69%, 27.77 %, 23.02 %, Work Spesific 4.18%, 3.46%, 3.94%, dan Work Ratio 2.67%, 2.18%, 2.16%. Penerapan High-Pressure Fogging dapat menurunkan temperatur udara ambien menjadi 27.24°C, 25.43°C, 22.89°C, meningkatkan Net Power sebesar 5.15%, 4.15%, 3.55%, meningkatkan Thermal efficiency menjadi 31.99 %, 27.96 %, 23.13 %, Work Spesific 4.89%, 3.93%, 3.41%, dan Work Ratio 4.31%, 2.63%, 2.37%. Di dapatkan Metode High-Pressure Fogging lebih efektif. Secara keseluruhan kedua metode Inlet Air Cooling dapat meningkatkan kinerja sistem turbin gas pada setiap beban operasional.
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The performance of gas turbines at Combined Cycle Power Plants (CCPPs) is significantly influenced by ambient air conditions. An increase in ambient temperature can reduce air density, thereby decreasing the mass flow rate of air entering the compressor and resulting in a reduction in power output and gas turbine system efficiency. One approach to improving performance is to implement inlet air cooling (IAC) upstream of the compressor. This study aims to analyze the effect of implementing IAC using the Wet Media Evaporative and High-Pressure Fogging methods on the performance of the CCGT gas turbine system at 100%, 75%, and 50% load. The research methodology involved a literature review and field observations, data collection, and psychrometric analysis to determine changes in air properties due to cooling, followed by simulations using Cycle-Tempo software. Models were created for existing conditions as well as for the Wet Media Evaporative and High-Pressure Fogging methods. The simulations were validated using theoretical calculations, and their effects on gas turbine performance at each load level were then analyzed. After implementing the IAC, the Wet Media Evaporative method was able to reduce the ambient air temperature to 28.12°C, 26.14°C, and 23.35°C, increase Net Power by 4.4%, 3.65%, and 3.03%, and improve Thermal Efficiency to 31.69%, 27.77%, and 23.02%, Work Specific by 4.18%, 3.46%, and 3.94%, and the Work Ratio by 2.67%, 2.18%, and 2.16%. The application of High-Pressure Fogging can lower the ambient air temperature to 27.24°C, 25.43°C, and 22.89°C, increasing Net Power by 5.15%, 4.15%, and 3.55%, and improving Thermal Efficiency to 31.99%, 27.96%, and 23.13%, specific work by 4.89%, 3.93%, and 3.41%, and the work ratio by 4.31%, 2.63%, and 2.37%. The high-pressure fogging method was found to be more effective. Overall, both inlet air cooling methods can improve the performance of the gas turbine system at every operational load.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Cycle-Tempo, High-Pressure Fogging, Inlet Air Cooling, Turbin Gas, Wet Media Evaporative, Cycle-Tempo, Gas Turbine, High-Pressure Fogging, Inlet Air Cooling, Wet Media Evaporative.
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ164 Power plants--Design and construction 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 Vocational > Mechanical Industrial Engineering (D4)
Depositing User:	Nabila Khairunnisa
Date Deposited:	31 Jul 2026 03:54
Last Modified:	31 Jul 2026 03:54
URI:	http://repository.its.ac.id/id/eprint/140491

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