Exergy and Thermoeconomic Analysis and Optimization of a CCHP System for a Residential Complex

In this study, the optimization and analysis of exergy and thermoelectronics of a combined heat and power generation system, heat and cold with thermal storage for use in a residential complex with an area of ​​147,000 square meters, with the main driving motive of the internal combustion engine. The optimization of the system is based on the annual cost minimization and in two modes of using and not using the thermal reservoir and using direct search method. In case of non-use of the thermal reservoir of the engine with a capacity of 2004 kW and 4001 hours of operation, in the mode of use of the thermal reservoir of the engine with a capacity of 2004 kW and a runtime of 5268 hours and a reservoir capacity of 18.93 cubic meters is the optimal choice. An assessment of the two systems for the state of sales and the lack of sales of surplus electricity to the grid is considered. The best functioning of the system is the use of the thermal storage tank and the sale of excess electricity to the network. In this case, compared to the non-use of the thermal storage tank, the primary energy consumption of 20.8%, carbon dioxide emissions was 19.5%, the cost of the system's performance was 14.3%, and the cost of purchasing electricity from the grid was 17%; The rate of return on capital shows a rise of 3.1 percent, but increases the annual cost of the system by 10.7 percent.