Thermodynamic and thermoeconomic analysis of a multigeneration system using solar and geothermal energies

Articles in Press

Document Type : Research Paper

Authors

Mechanical Engineering Department, Faculty of Engineering, Urmia University, Urmia, Iran

10.22104/hfe.2024.6923.1301

Abstract

Recently, discussions related to energy and the issue of global warming have caused the use of renewable energy to be highly considered. One of the suitable options for this purpose is the use of multigeneration systems with solar and geothermal energy sources. In this research, a multigeneration system of hydrogen, cooling, heating and power production based on the organic Rankine cycle, absorption chiller cycle dryer and the PEM electrolyzer is investigated from thermodynamic and thermoeconomic points of view. In the ORC cycles, the TEG unit is applied instead of the condenser and different working fluids are used to study their performance on the system. All the simulations are carried out using the EES software. The influences of different parameters on the efficiency of the multigeneration system is studied. According to the results, the energetic and exergetic efficiencies of the system are 41.58 % and 25.61 %, respectively. Moreover, by using the TEG unit, 466.4 kW extra power is obtained. Furthermore, the system can generate 493.1 kg/day hydrogen. From exergy destruction point of view, the solar collector and the PEM electrolyzer have the highest amounts. Finally, it is proved that the geothermal temperature and turbine inlet temperature have a positive effect on the performance of the system while collector inlet temperature leads to the decrease in the performance of the system.

Keywords

Main Subjects

Hydrogen, Fuel Cell & Energy Storage

Articles in Press, Accepted Manuscript
Available Online from 23 September 2024

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