Thermo-economic optimization of combined cooling, heating and power generation system including organic Rankine cycle

The main purpose of this study is the economic analysis of the system of combined cooling, heating and power- organic rankine cycle CCHP-ORC so that the supply of building energy needs for cold climates in one year with a new strategy that the year is divided into 24 parts of fifteen days. The prime mover is a gas turbine system that provides part of the heat and electricity needed by the building. Excess heat from the prime mover is recovered and given to organic rankine cycle to generate electricity. The study system was optimized by genetic algorithm with a total of 29 design parameters, including gas turbine capacity, absorption and electric chiller capacity, electric cooling ratio, auxiliary boiler capacity and 24 partial loads for gas turbines throughout the year and minimum total annual cost (TAC) Selected as the objective function. The results show that the annual cost and emission costs in the CCHP-ORC system are 2.2% and 14.7% lower than the CCHP system, respectively. The exergy efficiency of CCHP-ORC system is 40.93% which is 5.9% higher than CCHP system.