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Simulation of a multi-level absorption thermal battery with variable solution flow rate for adjustable cooling capacity

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  • Ding, Zhixiong
  • Wu, Wei

Abstract

Absorption thermal battery (ATB) has been regarded as a promising solution to increase the penetration of renewable energy in the energy supply. Currently, one of the biggest challenges for the ATB application is to overcome the attenuation problem in the discharging process caused by solution dilution. This study proposes a novel multi-level ATB to achieve adjustable cooling capacities. A three-level ATB is performed as an example and compared with the conventional ATB. Moreover, the solution flow rate regulation is further applied to reach more accurate supply-demand matching. Then, the effects of various parameters on the discharging performance are investigated. Results indicate that instead of gradually attenuating from 17.2 kW to 4.3 kW of the conventional ATB, three stable and switchable cooling capacities (i.e., 13.7 kW, 8.1 kW, and 5.1 kW) are achieved by a three-level ATB. The energy storage density of the three-level ATB (123.2 kWh/m3) is also higher than that of the conventional ATB (114.5 kWh/m3). Besides, three stable loads distributed in an arithmetic series have been satisfied accurately by the three-level absorption thermal battery with solution flow rate regulation. This work aims to provide theoretical references and suggestions for the development and applications of ATBs.

Suggested Citation

  • Ding, Zhixiong & Wu, Wei, 2024. "Simulation of a multi-level absorption thermal battery with variable solution flow rate for adjustable cooling capacity," Energy, Elsevier, vol. 301(C).
    • Handle: RePEc:eee:energy:v:301:y:2024:i:c:s0360544224014646
    DOI: 10.1016/j.energy.2024.131691
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