Study on Binary Cycle Power Plant Optimization of PLTP Tulehu Ambon with Aspen HYSYS

Abstract

Ambon Island has potential geothermal energy resources, one of them is geothermal energy in Tulehu where it is managed by PT. PLN has carried out exploration drilling, but the results of the exploration well test results obtained are low temperature and low pressure, so that cannot use conventional power plants. One of the technologies that can be used in this case is the binary cycle. The binary cycle can be used for low temperature geothermal fluid by using the working fluid to drive a turbine. The purpose of this research is to optimize power output by varying the working fluid, turbine inlet pressure and condenser temperature. Working fluids used are isopentane, n-butane and isobutane. The research method uses the Aspen HYSYS and uses REFTROP as a support analysis. Research shows that the power outputs of each working fluid are 2,471.30 kW, 2,052.13 kW and 1,743.09 kW. Working fluid selected used for PLTP Tulehu is isopentane whit net power output is 2,232.55 kW.