Preliminary Analysis of Single-Flash Geothermal Power Plant by Using Exergy Method. Case Study: Ulubelu Geothermal Power Plant-Indonesia

Alimuddin Muchtar

Abstract


Abstract- Indonesia is blessed with abundance of renewable energy source, including geothermal, which should be used effectively to generate the required electric power in the country. Ulubelu Geothermal power plant is one of the new installed facility in Indonesia. Analysis on its performance is indispensable for further improvement of the efficiency and effectiveness. The study is aimed to analyze the performance of Ulubelu Geothermal power plant by using exergy analysis and to optimize the power output of the plant. The results showed that about 19% of the total mass flow steam from production wells was used to produce about 54,180 kW. The rate of exergy input was 131,643 kW, out of which 83,364 kW was used for rotating the turbine. Exergy efficiency of the plant was 41.16%, with demister having the highest efficiency (95.98%). Meanwhile, the highest exergy loss occurred at separator (36.39%). The optimization result indicated that the power output can be increased to 2600 kW if the steam pressure can be increase to 7.598 bar and the condenser pressure decreased to 0.06503 bar.

Keywords


geothermal energy; Single-flash; Exergy analysis; Optimization; efficiency

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References


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DOI (PDF): https://doi.org/10.20508/ijrer.v8i3.8105.g7470

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