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Publishing Language: Chinese | Open Access

Analysis of the Characteristics of Solution Absorption Heat Storage Cycles

Zehua Chen1, Gang Wang1,2( ), Yonghan Zhao1, Qunli Zhang1
Beijing Key Laboratory of Heating, Gas Supply, Ventilation and Air Conditioning Engineering, Beijing University of Civil Engineering and Architecture, Beijing, 100044, China
Jiangsu Baixue Electric Appliance Co., Ltd., Suzhou, 215500, China
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Abstract

Solution absorption energy storage is a new energy storage and release technology characterized by high energy storage density, low heat loss, good mobility, and long-term energy storage. Energy storage density and energy storage efficiency are the key indexes for measuring the energy storage capacity of absorption energy storage systems and the key parameters for evaluating the energy conversion efficiency of absorption energy storage systems, respectively. Based on thermodynamic principles, the energy storage characteristics and applicability of absorption energy storage systems were investigated using six types of absorption solutions under different conditions. The results show that both energy storage density and energy storage efficiency increase with an increase in heat source temperature and cooling water temperature and decrease with solution concentration. At a heat source temperature of 70-120 ℃ and condensing temperature of 24-36 ℃, NaOH-H2O has the largest energy storage density and efficiency, CaCl2-H2O has the smallest energy storage density and efficiency, and LiBr-H2O has the widest applicability of temperature range.

Keywords

absorptionenergy storageenergy storage densityenergy storage efficiency
CLC number: TK02; TK01+9 Document code: A Article ID: 0253-4339(2025)03-0032-08

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Journal of Refrigeration
Volume 46 Issue 3,
June 2025
Pages 32-38
DOI: 10.12465/j.issn.0253-4339.2025.03.032

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Cite this article:
Chen Z, Wang G, Zhao Y, et al. Analysis of the Characteristics of Solution Absorption Heat Storage Cycles. Journal of Refrigeration, 2025, 46(3): 32-38. https://doi.org/10.12465/j.issn.0253-4339.2025.03.032

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Received: 05 November 2024
Revised: 20 December 2024
Accepted: 03 January 2025
Published: 16 June 2025
© 2025 The Editorial Office of Journal of Refrigeration

This is an open access article under the terms of the Creative Commons Attribution 4.0 International License (CC BY 4.0, http://creativecommons.org/licenses/by/4.0/).