Energy Conversion and Management

Solar based CO2 power cycle employing thermoelectric generator and absorption refrigeration: Thermodynamic assessment and multi-objective optimization

Onder Kizilkan, Shoaib Khanmohammadi, Morteza Saadat-Targhi
Publication Date:
A novel integrated power generation and refrigeration system proposed in this paper. The system consists of parabolic trough collectors, supercritical-CO2 based Brayton cycle, an absorption refrigeration cycle, and a thermoelectric generator. Of particular interests of this paper are thermoelectric power generator and performance characteristic of closed Brayton cycle working with CO2. Employing energy and exergy analyses, the effect of integrating thermoelectric module at different points is studied by comparing power generation and efficiency before and after applying the thermoelectric module. Besides, the whole system is analyzed with the use of first and second law thermodynamics to determine energy and exergy efficiencies with exergy destruction rates. Furthermore, a multi-objective optimization method is conducted by defining two scenarios using different types of objective functions to specify the …