Analysis of Condenser Vacuum Pressure Changes on the Electrical Load Generated by Unit 2 of Mamuju Coal-Fired Power Plant (PLTU)

Authors

  • Ilham S Author

Keywords:

Mamuju Power Plant, Steam Power Plant, Vacuum Pressure, Condenser Performance, Cooling Tower, Turbine Efficiency

Abstract

PLTU Mamuju has two Steam Power Plant units, each with a capacity of 25 MW. Based on the plant's design, unit 2 of PLTU Mamuju has a vacuum pressure of -90 kPa. In unit 2's condenser vacuum pressure, PLTU Mamuju experienced a decrease in vacuum pressure by -7 kPa in condenser vacuum 1, -9 kPa in condenser vacuum 2, and -10 kPa in condenser vacuum 3. This reduction in vacuum pressure is caused by several factors, including damaged cooling tower fans, collapsed cooling tower structures, and leaks in condenser tubes. This study aims to analyze the impact of condenser pressure reduction on turbine performance, cycle efficiency, and total electricity production at PT PLN (Persero) Mamuju Power Plant Sector, particularly in unit 2. The results show that the decrease in condenser vacuum pressure leads to a decline in turbine performance. In condenser vacuum 1, there was a production reduction of 597,600 kWh; in condenser vacuum 2, a reduction of 596,560 kWh; and in condenser vacuum 3, a reduction of 371,040 kWh. The total electricity production decreased by 1,465,200 kWh.

References

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Published

2025-02-24

Issue

Vol. 1 No. 1 (2025): Mechanical Engineering

Section

Articles

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Copyright (c) 2025 Ilham S (Author)

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This work is licensed under a Creative Commons Attribution 4.0 International License.