Geothermal Integrated System for Multi Generation

In this study, integrated, geothermal energy based system for multigeneration application with four useful outputs (electric power, heating, cooling, and hydrogen), which comprises from a Rankine Cycle (RC) for electrical power generation & for hot water recovery, and double effect absorption cooling cycle for cooling production, is proposed. The proposed system is investigated in detail. In order to determine the associated energies and irreversibilities in the system, the system components are investigated energetically and exergetically. The energy and exergy efficiencies of the RC are found to be 12.67% and 16.21%, respectively. Parametric studies are also performed to observe the effects of different parameters such as turbine inlet pressure, temperature and reference environment temperature on the exergy values. The energy and exergy COPs of the double effect absorption cooling system are found to be 1.437 and 0.3371, respectively. Exergy destruction is calculated for all the components, and it is found that maximum destruction occurred in RC high pressure turbine with 4021 kW and minimum destruction occurred in the condenser of double effect absorption cooling system (DEACS) which was 1.321kW. Keywords: Multi generation, geothermal, energy, exergy, Rankine Cycle, absorption cooling.