Analysis of Parabolic Concentrated Solar Power Integration in Geothermal Power Plant
Keywords:
Binary Cycle, Concentrated Solar Power, Geothermal, Geothermal Power Plant, Parabolic Trough Collector, Thermal Energy StorageAbstract
Indonesia is increasing the number of new and renewable energy power plants through PT. PLN (Persero) will achieve net zero emissions (NZE) in 2060. One of them that is being increased is geothermal energy, considering the potential of geothermal in Indonesia is 23.7 GWe. However, the utilization that has been carried out is only 2.6 Gigawatt. A contributing factor is the expensive investment cost to build a Geothermal Power Plant (GPP). Integration of geothermal and solar energy in a power plant can be implemented to increase the economics of the project. Solar energy in Indonesia that can be utilized as an energy source in a Parabolic Concentrated Solar Power (CSP) and Thermal Energy Storage is huge, namely 4.9 kW/m2. Integration of CSP into the GPP can be done by creating a Hybrid power plant which uses binary cycle to produce greater, optimal, and efficient energy. It also increases the power output and the efficiency of heat use from a GPP. For brine temperatures of 133.5°C, 150°C, 165°C and 180°C, the optimal Turbine Inlet Pressure are 6.83 bara, 8.23 bara, 10.03 bara and 12.67 bara, producing net powers of 608.93 kW, 847.94 kW, 1110.23 kW and 1423.29 kW, respectively.
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