Analysis of the Effect of Air Inlet Filter Replacement on Gas Turbine Performance at Unit 1A of Bekasi Power Combined Cycle Power Plant

Abstract

The air inlet filter is a critical component in a gas turbine system because it ensures that clean air enters the compressor and combustion chamber. The accumulation of dust, moisture, and airborne contaminants can increase pressure drop across the filter, reducing airflow rate and adversely affecting compressor performance, combustion efficiency, and overall gas turbine operation. This study aims to analyze the effect of air inlet filter replacement on the performance of Gas Turbine GT1A at Bekasi Power Combined Cycle Power Plant (CCPP). A quantitative comparative approach was employed by comparing operational data before and after air inlet filter replacement. Secondary data were obtained from the Distributed Control System (DCS), including compressor inlet temperature, compressor outlet
temperature, compressor inlet pressure, compressor outlet pressure, combustion chamber temperature, turbine exhaust temperature, fuel gas flow rate, and generator load. The performance analysis was conducted using Brayton cycle thermodynamic equations to evaluate compressor efficiency, combustion chamber efficiency, turbine efficiency, and thermal efficiency. Furthermore, a Fishbone Diagram (6M) analysis was utilized to identify the root causes leading to air inlet filter replacement. The results indicate that replacing the air inlet filter improves the quality and quantity of intake air supplied to the compressor, leading to enhanced combustion conditions and
improved gas turbine performance. The study highlights the importance of periodic air inlet filter maintenance in maintaining operational reliability, efficiency, and long-term performance of gas turbine systems