Energy Storage Science and Technology ›› 2022, Vol. 11 ›› Issue (11): 3534-3547.doi: 10.19799/j.cnki.2095-4239.2022.0300

• Energy Storage Materials and Devices • Previous Articles     Next Articles

Research progress on composite heat transfer enhancement technology of phase change heat storage system

Lan ZHAO1(), Guozhen WANG2   

  1. 1.Nanjing Tech University Pujiang Institute, Nanjing 211122, Jiangsu, China
    2.Industrial and Commercial Bank of China Data Center (Shanghai), Shanghai 201815, China
  • Received:2022-06-01 Revised:2022-07-09 Online:2022-11-05 Published:2022-11-09
  • Contact: Lan ZHAO E-mail:94386994@qq.com

Abstract:

Phase change materials (PCM) can realize energy storage through absorbing and releasing latent heat during phase change processes. PCM is extensively known in thermal energy storage and management because of its stable phase change temperature and high energy storage density. Nevertheless, it usually suffers from low thermal conductivity, which needs to be aggregated with heat transfer improvement technologies. Based on adopting only one particular improvement technology, the "composite heat transfer enhancement technology," which combines more than one heat transfer enhancement technology, has become a research hotspot of heat transfer enhancement and phase change heat-storage performance improvement. The major research in composite heat transfer technology is summarized in this research, covering studies based on fins or porous material, heat pipe joined independently, nanomaterials, and cascade heat storage. It was discovered that the best results were attained by combining heat pipes with fins or porous material. Under the same conditions, combining nanoparticles with fins or porous material is more efficient than utilizing nanomaterials alone. Compared with single cascade phase change, cascade PCM combined with fins or foam metal has faster heat storage and release rate and a more uniform fluid outlet temperature. Further studies are proposed to explore more composite improvement techniques. The influence of structural design or detail parameters needs additional experimental confirmation and enhancement, which can optimize the performance of PCM-based thermal storage systems.

Key words: phase change heat storage, composite heat transfer enhancement, fins, nanomaterials, heat pipe, porous material

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