The paper aims to give a performance examination of a cogeneration system combining power and refrigeration, based on an Organic Rankine Cycle (ORC) as well as Vapour Compression Cycle (VCC). The following working fluids R123, R11 and R601a were assessed energetically and exergetically. The impact of different parameters including the boiler temperature and evaporator temperature are carried out on ORC thermal efficiency, also coefficient of performance (COP) as well as total system efficiency. The exergy efficiency and the amount of the exergy destroyed in each system component were detected. R123 was recommended.
In order to ameliorate the ORC performances, the Regenerative Organic Rankine Cycle (RORC) is presented. This study presents a comparison of an ORC with an open feedwater heater (ORC-OFWH) an ORC with a closed feedwater heater (ORC-CFWH) and double stage regenerative ORC (DSR-ORC) using both OFWH and CFWH. The thermodynamic performances of each system are investigated adopting R123 as working fluid. Summing up the results, it can be concluded that the double stage regenerative ORC shows greater performances in term of thermal efficiency and exergy efficiency with 14% and 17% respectively higher over the ORC-OFWH and ORC-CFWH.
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