Geothermal energy-based combined cooling heating and power system

Abstract

This paper studied the geothermal energy-based combined cycle for power cooling and heating purposes. The power system consists of a double flash power cycle, whereas the LiBr-H2O refrigeration absorption cycle is used for the cooling effect. The exhausted geothermal energy from the separator is further utilized for hot water to domestic application in this system. Under the condition of 200°C geothermal water temperature, the overall efficiency of the cycle is coming out 73%, which shows that the heat lost is very less, i.e., maximum heat is utilized in this cycle. The steam turbine work is 759.24 KW, whereas the COP of vapor absorption refrigeration is 0.685, and the leading coefficient of performance of the process is 0.85 working on optimal conditions. The COP of the system increases with an increase in generator temperature, but with an increase in evaporator and condenser temperature, vapor absorption cycle performance decreases.