Analisa Unjuk Kerja Gas Turbin 130 MW Dengan Blade Stage Pertama Yang Terupgrade

Abrori, Muhammad Hizbullah (2026) Analisa Unjuk Kerja Gas Turbin 130 MW Dengan Blade Stage Pertama Yang Terupgrade. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Peningkatan efisiensi dan keandalan pada pembangkit listrik sangat bergantung pada performa turbin gas. Penelitian ini berfokus pada studi numerik perbandingan distribusi tekanan dan temperatur pada upgrade blade tingkat pertama turbin gas berkapasitas 130 MW, serta evaluasi dampaknya terhadap unjuk kerja termodinamika dan kelayakan investasi. Metodologi yang digunakan mencakup tiga tahapan utama: (1) simulasi aliran Computational Fluid Dynamics (CFD) menggunakan perangkat lunak ANSYS Fluent dengan pendekatan model 2D pada posisi penampang tengah (mid-span) untuk mengevaluasi profil blade desain baru versus lama; (2) simulasi siklus termodinamika secara keseluruhan menggunakan perangkat lunak GateCycle untuk menghitung konsumsi bahan bakar dan reduksi emisi; serta (3) analisis tekno-ekonomi untuk membandingkan kelayakan skenario investasi antara pelaksanaan upgrade secara langsung dengan skenario menunggu batas Equivalent Operating Hours (EOH) blade lama habis terpakai.
Hasil simulasi CFD 2D pada mid-span menunjukkan bahwa profil blade baru mampu mendistribusikan tekanan dan temperatur secara lebih optimal dibandingkan profil lama. Pada level sistem pembangkit, upgrade blade pertama ini berdampak pada peningkatan efisiensi termal yang diiringi dengan penurunan Specific Fuel Consumption (SFC) sebesar 0.071kg/s. Penghematan bahan bakar gas tersebut secara langsung berkontribusi pada penurunan emisi gas rumah kaca sebesar 1.409 ton ekuivalen CO2 per tahun. Dari tinjauan investasi finansial, skenario menghabiskan EOH Blade lama terbukti lebih layak secara ekonomi, dengan mengurangi potensi kerugian sebesar 5.3 miliar rupiah dan penghematan operasional yang lebih baik dibandingkan skenario upgrade sebelum siklus EOH berakhir. Kesimpulannya, upgrade blade tingkat pertama terbukti tidak hanya meningkatkan unjuk kerja aerodinamika turbin gas 130 MW, tetapi juga memberikan keuntungan dari aspek pelestarian lingkungan dan keekonomian operasional.
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The improvement of efficiency and reliability in power plants highly depends on gas turbine performance. This research focuses on a numerical study comparing the pressure and temperature distributions of a first-stage blade upgrade in a 130 MW gas turbine, as well as evaluating its impact on thermodynamic performance and investment feasibility.
The methodology used encompasses three main stages: (1) Computational Fluid Dynamics (CFD) flow simulation using ANSYS Fluent software with a 2D model approach at the mid-span position to evaluate the new versus old blade design profiles; (2) overall thermodynamic cycle simulation using GateCycle software to calculate fuel consumption and emission reduction; and (3) techno-economic analysis to compare the investment feasibility between executing the upgrade immediately and the scenario of waiting until the Equivalent Operating Hours (EOH) limit of the old blade is fully consumed.
The 2D CFD simulation results at the mid-span show that the new blade profile is able to distribute pressure and temperature more optimally compared to the old profile. At the power plant system level, this first-stage blade upgrade results in an improvement in thermal efficiency, accompanied by a decrease in Specific Fuel Consumption (SFC) of 0.071 kg/s. This gas fuel saving directly contributes to a reduction in greenhouse gas emissions by 1,409 tons of CO2 equivalent per year. From a financial investment perspective, the scenario of exhausting the old blade's EOH is proven to be more economically viable, reducing potential losses by 5.3 billion rupiah and providing better operational savings compared to the upgrade scenario before the EOH cycle ends. In conclusion, the first-stage blade upgrade is proven to not only improve the aerodynamic performance of the 130 MW gas turbine but also provide benefits from the aspects of environmental conservation and operational economics.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Blade, Turbin gas, Simulasi, CFD, Upgrade, gateCycle, Ansys , Gas turbine, Simulation
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ266 Turbines. Turbomachines (General)
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21101-(S2) Master Thesis
Depositing User:	Muhammad Hizbullah Abrori
Date Deposited:	30 Jul 2026 07:33
Last Modified:	30 Jul 2026 07:33
URI:	http://repository.its.ac.id/id/eprint/138845

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