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<p>Rising concerns regarding environmental degradation and energy sustainability have highlighted the need for innovative approaches to convert waste heat efficiently. Mobile thermochemical energy storage (MTES) has emerged as a promising method by effectively utilizing waste heat from power plants and transforming it into useful energy for heating and cooling applications. Therefore, this study delves into assessing the feasibility/potential of an MTES-based refrigeration system for meeting building space cooling needs by comparing its energy and exergy performance with vapor absorption refrigeration systems (VARS). A thermal model has been developed to evaluate each component’s year-round energy and exergy performance comprehensively. The thermal model results for the absorber and regenerator’s coefficient of performance and the charging and discharging station’s outlet temperature/humidity were validated with the experimental data, showing good agreement with a maximum possible error of ± 11% and ± 9%, respectively. The energy efficiency ratio (EER), exergy destruction rate (EDR), exergy efficiency (EE), coefficient of performance (COP), and exergy coefficient of performance (ECOP) were employed as the performance indices. The year-round energy-based performance comparison revealed that the MTES-based refrigeration system attained a higher energy flow rate. Additionally, the average EER and COP of the MTES were approximately 4 and 2.02 times higher than those of VARS. Further, the exergy-based performance comparison between the MTES and VARS confirmed the superior performances of the MTES systems in terms of higher COP (1.64), ECOP (0.392), exergy efficiency (22.71%), and overall exergy destruction rate (1.05&#xa0;kW). Moreover, annual and component performance comparisons demonstrated that the MTES-based system dynamically utilized industrial waste heat to meet cooling load requirements while offering enhanced flexibility in adapting to seasonal variations. The analysis highlights the practicality and cost-effectiveness of the MTES-based refrigeration systems for space cooling applications with substantial potential for environmental sustainability and energy conservation.</p>

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Energy and exergy comparison of mobile thermochemical energy storage-based refrigeration system with vapor absorption refrigeration system

  • 期刊论文

  • 发表日期：

    2025年7月12日

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  • Manish Sonkar,
  • B. Kiran Naik

摘要

Rising concerns regarding environmental degradation and energy sustainability have highlighted the need for innovative approaches to convert waste heat efficiently. Mobile thermochemical energy storage (MTES) has emerged as a promising method by effectively utilizing waste heat from power plants and transforming it into useful energy for heating and cooling applications. Therefore, this study delves into assessing the feasibility/potential of an MTES-based refrigeration system for meeting building space cooling needs by comparing its energy and exergy performance with vapor absorption refrigeration systems (VARS). A thermal model has been developed to evaluate each component’s year-round energy and exergy performance comprehensively. The thermal model results for the absorber and regenerator’s coefficient of performance and the charging and discharging station’s outlet temperature/humidity were validated with the experimental data, showing good agreement with a maximum possible error of ± 11% and ± 9%, respectively. The energy efficiency ratio (EER), exergy destruction rate (EDR), exergy efficiency (EE), coefficient of performance (COP), and exergy coefficient of performance (ECOP) were employed as the performance indices. The year-round energy-based performance comparison revealed that the MTES-based refrigeration system attained a higher energy flow rate. Additionally, the average EER and COP of the MTES were approximately 4 and 2.02 times higher than those of VARS. Further, the exergy-based performance comparison between the MTES and VARS confirmed the superior performances of the MTES systems in terms of higher COP (1.64), ECOP (0.392), exergy efficiency (22.71%), and overall exergy destruction rate (1.05 kW). Moreover, annual and component performance comparisons demonstrated that the MTES-based system dynamically utilized industrial waste heat to meet cooling load requirements while offering enhanced flexibility in adapting to seasonal variations. The analysis highlights the practicality and cost-effectiveness of the MTES-based refrigeration systems for space cooling applications with substantial potential for environmental sustainability and energy conservation.