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Analysis of a multiple generation system based on geothermal energy by simultaneously using two organic Rankine cycles, a compressed air storage source, and an absorption chiller in different regions
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Abolfazl Karami1   , Ehsanollah Assareh *2 , Reza Poultangari1 |
1- Department of mechanical engineering, Dezful Branch, Islamic Azad University, Dezful, Iran.
2- Department of mechanical engineering, Dezful Branch, Islamic Azad University, Dezful, Iran. , assareh.ehsanolah@gmail.com |
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Abstract: (10 Views) |
In this study, the modeling and optimization of a multiple generation system based on geothermal energy was carried out with the aim of maximizing the system performance. The system under study consists of geothermal subsystems, organic Rankine cycles 1 and 2, compressed air energy storage source, and absorption chiller. The system modeling was performed using the EES software for solving engineering equations. The response surface methodology and Design Expert software were used to optimize the objective functions of the proposed system. Two objective functions ERTE and cost rate were determined to increase the technical performance and reduce the economic costs of the system. The design variables for optimizing the problem includeinlet temperatures of turbines 1 and 2, pump 1, CAES tank and evaporator, geothermal mass flow rate, turbine efficiency, pump efficiency, compressor efficiency, gas turbine efficiency, and evaporator pinch point temperature. To increase the performance of the Rankine cycle, various organic fluids were investigated, and the results showed that R123 refrigerant and ammonia increased the system performance. The most optimal exergy efficiency value was 98.77% and the cost rate was 48.5 USD/hour. 10 study cities were selected to launch the proposed system in Iran. The performance analysis of the system in Iran, considering the best location in terms of technology and economy, showed that Bandar Anzali city is the best area to launch the system; environmental results showed that by launching the proposed system in Bandar Anzali city of Iran, it can help expand 11 hectares of green space. |
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| Keywords: Geothermal energy, multiple energy generation system, compressed air energy storage, multi-objective optimization. |
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Full-Text [PDF 2403 kb]
(12 Downloads)
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Type of Study: Research |
Subject:
Thermodynamics
Received: 2024/11/19 | Accepted: 2025/02/11 | Published: 2025/02/28
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