Evaluation of an integrated solar-geothermal energy system to provide power, heat and cooling

In the present research, an integrated solar-geothermal energy system is proposed. This energy system consists of a single flash geothermal cycle, single effect absorption refrigeration cycle, heat pump cycle for drying process, solar energy saving comportment, two steam turbines for power production, cooling system for domestic usage and heating for industrial application. The aim of this system is providing cooling and heating for domestic and industrial appliances and drying food products. The energy and exergy efficiency of the system were 92% and 57%, respectively. The effect of parameters such as surrounding temperature, the temperature and the mass flow rate of geothermal tank, and the outlet water temperature of the generator of absorbtion cooling system on energy and exergy efficiency of the system were investigated. The overall energy efficiency does not change by increasing surrounding temperature from 270 K to 320 K, but overall exergy efficiency, turbine 1, and turbine 2 decrease almost 7%, 3% and 4%, respectively.