Heat transfer performance of thermal energy storage components containing composite phase change materials

Bo Zhao, Chuan Li, Yi Jin, Cenyu Yang, Guanghui Leng, Hui Cao, Yongliang Li, Yulong Ding

Research output: Contribution to journalConference articlepeer-review

Abstract

This study concerns about the heat transfer behaviour of composite phase change materials (CPCMs) based thermal energy storage components. Two types of components, a single tube and a concentric tube component, are designed and investigated. The CPCMs consist of a molten salt based phase change material, a thermal conductivity enhancement material (TCEM) and a ceramic skeleton material. A mathematical model was established to model the heat transfer behaviour. The modelling results were first compared with experiments and reasonably good agreement with the experimental data was obtained, demonstrating the reliability of the model. Extensive modelling studies were then carried out under different conditions. The influence of thermoproperties, surface roughness and size of the CPCMs as well as heat transfer fluid (HTF) velocity were examined. The results show that the thermal contact resistance between the CPCMs should be considered. Increasing the mass fraction of TCEMs and thickness of CPCMs as well as the HTF velocity intensifies the heat transfer behaviour of component. The concentric tube based component offers a better heat transfer performance compared with the single tube based component, with the total heat storage and release time ∼10 and 15 respectively, for a given set of conditions.
Original languageEnglish
Pages (from-to)1515-1522
Number of pages8
JournalIET Renewable Power Generation
Volume10
Issue number10
Early online date27 Jul 2016
DOIs
Publication statusPublished - 1 Nov 2016
Externally publishedYes
Event2nd Offshore Energy & Storage Symposium - Edinburgh, United Kingdom
Duration: 1 Jul 20153 Jul 2015
Conference number: 2
https://www.oses.eng.ed.ac.uk/

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