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Dynamic supply-demand matching and operational parametric study of a solar single-effect absorption/compression cascade thermal battery system

Author

Listed:
  • Song, Mengyu
  • Li, Nianping
  • Liu, Qingqing
  • Shi, Fangning
  • Wang, Min

Abstract

To address the mismatch between solar energy utilization and building demand, this study adopts a solar single-effect absorption/compression cascade thermal battery (SSAC-CTB) for space cooling. The proposed system can utilize both electrical and solar energy for cascade energy storage, meeting the dual demand for space cooling and charging in office buildings. Based on the validated thermodynamic mathematical model, the dynamic supply-demand matching characteristics and adaptability of the SSAC-CTB system in four typical cities located in different climate zones are investigated and compared. Moreover, the effects of the heat-collection area and solution charge on the performance of the proposed system are calculated. The performance of the proposed system is then benchmarked against that of two conventional absorption thermal battery (ATB) systems. The results show that the proposed system can satisfy the dual demand for space cooling and charging with a satisfactory discharging met ratio (DMR) in various climatic zones when configured with a 500 m2 collector area and a 3000 kg solution charge. The highest DMR of 0.86 is obtained in Beijing, and the energy-saving rate is 45.04 % compared with the conventional air-source compression refrigerant system. The energy storage density (ESD) achieves maximum values of 154.41 kW h/m3 with a 500 m2 collector area and 154.63 kW h/m3 with a 3000 kg solution charge. Moreover, the ESD of the proposed system is improved by 37.91 % and 62.97 % compared to the solar absorption chiller with integrated ATB and the heat pump with integrated ATB, respectively. This study promotes the development and application of integrated ATB technology.

Suggested Citation

  • Song, Mengyu & Li, Nianping & Liu, Qingqing & Shi, Fangning & Wang, Min, 2026. "Dynamic supply-demand matching and operational parametric study of a solar single-effect absorption/compression cascade thermal battery system," Energy, Elsevier, vol. 342(C).
    • Handle: RePEc:eee:energy:v:342:y:2026:i:c:s0360544225052545
    DOI: 10.1016/j.energy.2025.139612
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    References listed on IDEAS

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