Thermodynamic and economic investigation of a new multiple generation system based on a double-effect absorption heat transformer combined with compressed air energy storage

Articles in Press

Document Type : Original Article

Authors

1 Phd student, Department of Mechanical Engineering, Faculty of Engineering, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran

2 Professor, Department of Mechanical Engineering, Faculty of Engineering, University of Mohaghegh Ardabili, Ardabi, Iran

10.22059/ses.2025.392283.1129

Abstract

This study investigates a multi-generation system that allows for power generation, cooling capacity, and hydrogen production. The system consists of a gas cycle unit, an absorption heat transformer, a proton exchange membrane electrolysis, an air energy storage system, and an air heat exchanger generator. The energy analysis in the case study of the proposed system aims to calculate key parameters such as net output power, hydrogen production rate, and energy efficiency. The exergy evaluation performed in the studied system is of great importance in identifying exergy degradation in the system components to improve performance. In addition, a parametric analysis was performed to understand how different operating conditions affect the system performance. The innovative aspect of the present study is that the gas turbine losses are recovered and directly used to supply the energy consumption of the electrolyzer for hydrogen production. The results of the thermodynamic evaluation show that the energy efficiency of the proposed system is 26% while the exergy efficiency is 12%. The results show that this system is capable of producing hydrogen at a rate of 0.037 kg/h, which can meet the needs of a part of the target consumer. The total exergy destruction in the studied system is 1479 kW and the output power is 49.5 kW. The economic analysis shows the total cost of the system to be $0.204 per gigajoule. In addition, the break-even cost of electricity production is $4.379 and the cost of hydrogen production is $1.741.

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Journal of sustainable Energy Systems

Articles in Press, Accepted Manuscript
Available Online from 02 May 2025

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