Parametric study of a new multi-generation driven by geothermal energy

The current study deals with the development and simulation of a new geothermal driven multi-generation system exergetically and economically. The proposed system involves a cascade organic Rankine cycle (ORC) and proton exchange membrane (PEM) electrolyzer to produce power, the vaporized liquefied natural gas (LNG), the cooling effect and hydrogen. From the simulation results, the energy and exergy efficiencies are calculated within 82.6% and 38.8%, respectively. To assess the performance of the proposed system two major design parameters, namely G_1 pressure (PG_1), geothermal mass flow rate ( ) are considered. Sensitivity analysis implies that both and PG_1 decrease the energy efficiency and total product cost rate ( ) of the overall system by about 11.85% and 1.6%, respectively while they have a positive effect on the exergy efficiency within 0.24%.