Akademik Veri Yönetim Sistemi
JOURNAL OF THE FACULTY OF ENGINEERING AND ARCHITECTURE OF GAZI UNIVERSITY, cilt.37, sa.3, ss.1625-1637, 2022 (SCI-Expanded, Scopus, TRDizin)
Purpose: In this study, thermodynamic modeling and analysis of geothermal and solar assisted cogeneration energy system to supply the electricity and heating requirement of residences is performed. Theory and Methods: Electricity is generated in a Organic Rankine Cycle. The generated electricity is supplied to the grid for use in residences. In off-peak periods, excess electricity is used in the water electrolysis unit to produce and store hydrogen fuel. During peak periods when electricity demand is high, the stored hydrogen is converted into electricity in the fuel cell and supplied to the grid. In addition, the heat energy released from the cycle as waste heat in the ORC cycle is used in residential heating. Using the geothermal and solar energy values of Afyonkarahisar province, the thermodynamic analysis of the system is performed in the EES software. Parametric studies are conducted to examine the effects of geothermal source temperature and solar radiation values on the power, electricity and heat generation. Results: This energy system generates 2420 kW of power from ORC cycle. If all 2420 kW of electrical power is used to store hydrogen, 0.0154 kg/s of hydrogen can be produced. Then, when needed, 1668 kW of electricity can be generated by using hydrogen in the fuel cell. The heating capacity of geothermal fluid released as waste heat from the ORC cycle is 8933 kW. The overall energy and exergy efficiency of the system are calculated as 34.5% and 46.0%, respectively. Conclusion: This study is based on the results obtained by the thermodynamic analysis of the geothermal and solar assisted cogeneration energy system. It has been observed that as the geothermal temperature and solar radiation values of the system increase, the generation of electricity and hydrogen and heating capacity increases.