Thermodynamic performance analysis of geothermal and solar energy assisted power generation and residential cooling system

Abstract

In this study, geothermal and solar assisted cogeneration system is modeled to the supply of electricity and cooling. The energy requirements of Afyon Kocatepe University, Faculty of Technology building, are investigated. The building cooling system is performed by using heat energy provided from geothermal and solar energy in an absorption cooling system. Subsequently, it is aimed to generate electricity in the Organic Rankine Cycle (ORC) with geothermal water and waste heat leaving the cycle. It is planned that the electricity produced in the power cycle is supplied to the grid system according to the requirement. The cooling load of the faculty building is calculated by considering the working conditions of the faculty building. The ideal thermodynamic analysis and performance evaluation of the system has been performed by using Engineering Equation Solver (EES) software into consideration by considering the cooling season, geothermal and solar energy data of Afyon in the summer season. The parametric study of the system is performed by considering different geothermal water temperature and solar radiation. The reversible COP of the absorption cooling system is calculated to be 3.18. The maximum heat energy value obtained from solar energy is calculated to be 74.97 kW in June. The highest ideal cooling capacity and maximum power provided from geothermal and solar assisted cogeneration energy systems are calculated to be 40,222 kW and 4688 kW, respectively, in June. These results are sufficient to supply the electrical and cooling requirements of the faculty building.