Thermodynamic and Exergy Economic Analysis Combined Heat Power and Cooling in a Combined Cycle with Ejector Using Solar Energy

Document Type : Research Article

Authors

1 Instructor of Department of Mechanical Engineering, Faculty of Engineering, University of Guilan

2 Department of mechanical engineering, Roudsar and Amlash branch, Islamic Azad University, Roudsar, Iran

Abstract

Combined heat and power systems are used for renewable energies and reducing fossil fuels. This work, investigated energy efficiency, exergy, and exergy economic a Brayton cycle and refrigeration cycle with an ejector that used solar energy as a heat source. Inlet pressure turbine, outlet pressure turbine, inlet temperature turbine, and temperature of the evaporator are variable parameters, when one of the parameters changes, the other parameters are kept constant so that the thermodynamic analysis focuses on important parameters. Results showed that inlet pressure of initial flow in ejector and outlet velocity of flow on ejector are increased with increasing outlet pressure of turbine. The storage tank had the most exergy destruction rate among all components for the high-temperature difference that it’s almost 29% from all of the exergy destruction rates. Also, the highest cost per unit of power is related to the combined heat and power cycle that it’s about 53% of the total cost.

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