Article Per Year (5 Year)
p-Index From 2021 - 2026
0.23
P-Index
This Author published in this journals
All Journal Jurnal Teknik Mesin
Rahardianto Ramadhan
Institut Teknologi Perusahaan Listrik Negara (ITPLN)
Control & Systems Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering

Published : 1 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 1 Documents
Search

 1 
Evaluasi Efisiensi Turbin Gas PLTGU Muara Tawar Pasca-Overhaul Eri Prabowo; Trassanda Scudetto Widestomo Putra; Rahardianto Ramadhan
JTM : JURNAL TEKNIK MESIN Vol 2 No 2 (2026)
Publisher : Pengelola Jurnal Politeknik Negeri Ketapang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58466/23bj7m09

Abstract

Gas turbine performance in a combined-cycle power plant is strongly affected by compressor condition, combustion stability, turbine expansion efficiency, and fuel consumption. This study evaluates the effect of minor-inspection overhaul on the gas turbine efficiency of Block 4 Unit 1 at PLTGU Muara Tawar using performance-test data at 137 MW before and after overhaul. The method applies Brayton-cycle calculations by processing inlet and outlet temperature, pressure ratio, air and fuel mass flow, compressor work, turbine work, heat input, back work ratio, heat rate, and component efficiency. The results show that overhaul improved the main performance indicators. Thermal efficiency increased from 32.85% to 32.93%, compressor efficiency from 90.96% to 91.58%, combustion chamber efficiency from 96.94% to 97.08%, and turbine efficiency from 90.42% to 90.48%. Heat rate decreased from 10,957.89 kJ/kWh to 10,930.15 kJ/kWh. The improvement was associated with air-intake filter restoration, compressor inlet guide vane cleaning and recoating, combustion chamber repair, burner maintenance, and turbine blade replacement. Therefore, minor inspection contributed to restoring gas turbine performance, although periodic monitoring of heat rate, compressor fouling, exhaust temperature, and fuel-air ratio is still required
Co-Authors Eri Prabowo Trassanda Scudetto Widestomo Putra