Thermodynamic Analysis (Energy and Exergy) of an Integrated Cogeneration System of Power and Hydrogen using Organic Rankine Cycle and Proton Exchange Membrane Electrolyzer

In this research, an organic Rankine cycle(ORC) equipped with a regenerator and a feed fluid heater used for power production. Also a proton exchange membrane used for hydrogen production that handled by the ORC. Energy requirement of the ORC was supplied via geothermal energy. A comprehensive thermodynamic model (energy and exergy) of the integrated system was done to compare the operation of four different fluid works. The EES software was used for all of the simulations. Also, a parametric study was done to investigate the effects of the important operational parameters on the energetic and exergetic performance of the considered systems. The results showed that among the different working fluids, R245fa has the most energy and exergy efficiency with the amounts of 3.511% and 67.58%, respectively. After that, R114, R600 and R236fa have the best operating performance, respectively. By increasing of the geothermal fluid temperature, the amounts of power and hydrogen productions increased but the energy and exergy efficiencies decreased.