Abstract

In this study, geothermal and solar energy assisted cogeneration energy system has been modeled to supply residences electricity and cooling requirements. The geothermal water from the geothermal resource and the heat transfer fluid heated in the parabolic collector is used as the heat source in the absorption cooling system. Electricity is generated in the binary power plant with geothermal water and heat transfer fluid from the absorption cooling system. The generated electricity is supplied to the grid. Thermoeconomic analysis of the system is performed by using the Engineering Equation Solver (EES) program by using geothermal and solar energy values of Afyonkarahisar. The geothermal resources temperature and mass flow in the system is 130 ºC and 85 kg/s, respectively. The parabolic trough collector operates in the range of monthly average solar radiation values (500-600 W/m2) calculated for the summer season, where cooling is planned. The LiBr-H2O solution is chosen as the refrigerant of the absorption cooling system. The systems parametric study is performed by considering the different geothermal resource temperatures and solar radiation values. According to these results, the unit electricity and unit cooling costs produced in the system will be investigated. The optimum working conditions are investigated in producing and using the energy form (electricity-cooling) requirements.

References

[1] Yilmaz, C. (2017). Thermodynamic and economic investigation of geothermal powered absorption cooling system for buildings. Geothermics, 70, 239-248.

[2] Shahin, M. S., Orhan, M. F., & Uygul, F. (2016). Thermodynamic analysis of parabolic trough and heliostat field solar collectors integrated with a Rankine cycle for cogeneration of electricity and heat. Solar Energy, 136, 183-196.

[3] https://www.thinkgeoenergy.com/

[4] https://iea-pvps.org/snapshot-reports/snapshot-2020/

[5] Li, Y., & Yang, Y. (2014). Thermodynamic analysis of a novel integrated solar combined cycle. Applied energy, 122, 133-142.

[6] Cengel, Y. A., & Boles, M. A. (2015). Thermodynamics: An Engineering Approach, -PDF. McGraw-Hill

[7] Bejan A., Tsatsaronis G., Moran M. 1996. Thermal Design and Optimization (1st edition). New York: Wiley.

[8] Dhillon, B. S. 2009. “Life cycle costing for engineers”, Crc Press.