The dynamic theoretical analysis of performance characteristics for open-cycle absorption energy storage system using HCOOK-H2O as the working fluid under full and partial mode
Open absorption energy storage systems can efficiently address the temporal and spatial mismatches between the solar energy driving heat source and the user. The energy storage mode of operation of a single-stage open absorption heat pump system with HCOOK-H2O solution and compact structure utilized...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-10-01
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| Series: | Case Studies in Thermal Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X25010809 |
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| Summary: | Open absorption energy storage systems can efficiently address the temporal and spatial mismatches between the solar energy driving heat source and the user. The energy storage mode of operation of a single-stage open absorption heat pump system with HCOOK-H2O solution and compact structure utilized for waste heat recovery of industrial humid gases, was firstly investigated. The open absorption energy storage system with the configuration of a single storage space proposed in the article can realize the energy storage function without changing the original heat pump configuration and can achieve continuous and stable output. A dynamic calculation model utilizing Euler's method was established for the absorption energy storage system, and theoretical calculations were carried out for both partial and full energy storage modes based on different ratios of condensate vapor flow rates to absorption vapor flow rates. According to the calculations, for the required system parameters, the relative deviations of coefficient of performance (COP) and energy storage density (ESD) are 3.68 % for full energy storage mode and 4.33 % for partial energy storage mode, while the time required per unit of stored energy differs by 16.59 h. The research provides a relatively accurate prediction for the instantaneous state of the solution energy storage system. |
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| ISSN: | 2214-157X |