ANALISIS METODE PENGATURAN AIR PENDINGIN GAS REMOVAL SYSTEM TERHADAP EFISIENSI KONDENSOR UNIT 2 PLTP GUNUNG SALAK

The Mount Salak Geothermal Power Plant (PLTP) has three generating units. Unit 2 is indicated to have experienced an increase in condenser pressure from 0.15 BarA to 0.18 BarA, which prevents it from operating at its maximum capacity (<60 MW). This increase in condenser pressure affects condenser efficiency, resulting in suboptimal operation. Based on field data and analysis, the increase in condenser pressure in unit 2 is due to suboptimal performance of the Gas Removal System (GRS), considering that the Non-Condensable Gas (NCG) entering unit 2 has changed from ±0.4% to ±0.65%. Based on this issue, a Root Cause Failure Analysis (RCFA) method was used to analyze the problem. The absence of a Standard Operating Procedure (SOP) for regulating cooling water in the Gas Removal System makes this method less effective, necessitating the development of an SOP for regulating cooling water in the Gas Removal System. Based on the results of testing and the creation of a standard operating procedure (SOP) for regulating cooling water in the Gas Removal System, it can be concluded that the GRS performance is very suboptimal due to the excessive amount of water flow entering the inter/after condenser. This is proven by the actual decrease in water flow of 30 t/h, the condenser pressure can drop from 0.1823 bar a to 0.165 bar a, with the same condenser inlet temperature of 29.4 °C. After adjusting the cooling water in the Gas Removal System, the highest condenser efficiency was obtained at 85.533%, while the efficiency before applying the cooling water regulation method in the Gas Removal System was highest at 78.449%.
Keywords: NCG, Gas Removal System, Condenser, SOP