Efficiency of Boiler and Steam Turbine for Power Plant Unit 2 PT. XYZ

Husni Mubarak; Mahmuddin Mahmuddin; Sungkono Sungkono; Muhammad Arham

doi:10.29407/jmn.v7i1.21676

Authors

Husni Mubarak Program Pascasarjana Magister Teknik Mesin, Universitas Sulawesi Tenggara
Mahmuddin Mahmuddin Jurusan Teknik Mesin, Fakultas Teknik, Universitas Muslim Indonesia
Sungkono Sungkono Jurusan Teknik Mesin, Fakultas Teknik, Universitas Muslim Indonesia
Muhammad Arham Universitas Patria Artha

DOI:

https://doi.org/10.29407/jmn.v7i1.21676

Keywords:

AFR, excess O2, boiler efficiency, turbine efficiency

Abstract

PT. XYZ has an electric power capacity of 70 MW and began operating in 2014 during its operation there has been a decrease in power from 35 MW at the time of commissioning to 32 MW. This study investigates the impact of the air-fuel ratio (AFR) on the efficiency of a thermal system, focusing on the boiler, turbine, and overall thermal cycle efficiency. Variations in excess O2 in flue gas were examined at levels of 5.0%, 5.5%, and 6.0%. The results reveal that the boiler efficiency peaks at 5.0% excess O2 (73.50%), while an increase in excess O2 or AFR leads to a decrease in efficiency. Turbine efficiency remains relatively stable (74-76%) despite a slight decline with increased AFR. The thermal cycle efficiency reaches its maximum at an AFR of 13.61 (45.60%) but diminishes at higher AFR values.

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Author Biographies

Mahmuddin Mahmuddin, Jurusan Teknik Mesin, Fakultas Teknik, Universitas Muslim Indonesia

Jurusan Teknik Mesin, Fakultas Teknik, Universitas Muslim Indonesia

Sungkono Sungkono, Jurusan Teknik Mesin, Fakultas Teknik, Universitas Muslim Indonesia

Jurusan Teknik Mesin, Fakultas Teknik, Universitas Muslim Indonesia

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