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Comparative investigation on heat transfer enhancement of surface-roughened and nano-dispersed phase change material for thermal energy storage

Title
Comparative investigation on heat transfer enhancement of surface-roughened and nano-dispersed phase change material for thermal energy storage
Author
라비찬드란 산토쉬
Keywords
heat transfer enhancement; latent heat storage; nanodispersion; phase change material; shot‐; peening
Issue Date
2021-08
Publisher
WILEY
Citation
INTERNATIONAL JOURNAL OF ENERGY RESEARCH; MAY 3 2021, 14p.
Abstract
Considering the increasing energy demand and cost, phase change materials(PCM) are gaining momentum for efficient thermal energy storage (TES).However, beyond desirable properties, poor thermal stability is a major draw-back of the PCM. To address the same, the present study aims to comparativelyevaluate the thermal behavior of the plain encapsulated paraffin PCM, PCMwith surface-roughened (shot-peened) encapsulation, and PCM with Al2O3nanoparticles respectively. The charging and discharging characteristics wereassessed experimentally with the investigation on PCM's behavior consideringlower (0.0124 kg/s) and higher (0.0155 kg/s) air heat transfer fluid (HTF) massflow rates. Results indicated that shot-peened capsule contributed to the maxi-mum heat transfer rate due to efficient nucleating convective effect followedby nano-dispersed and plain capsules respectively. The duration for completemelting of PCM in the shot-peened capsule was 11.53% and 20.6% lesser com-pared to the other two cases. Similarly, the period of complete solidificationwas 20.23% and 10.38% lesser in shot-peened capsule compared to nano-dispersed and plain capsules. Further, the effect of HTF's flow rate was mini-mal (up to 5.95%) during both charging and discharging periods. Thus, com-paratively shot peening on the capsule's inner surface was found to efficientlycontribute to heat transfer augmentation of the paraffin wax PCM out-performing other cases.
URI
https://onlinelibrary.wiley.com/doi/full/10.1002/er.6828https://repository.hanyang.ac.kr/handle/20.500.11754/172469
ISSN
0363907X; 1099114X
DOI
10.1002/er.6828
Appears in Collections:
RESEARCH INSTITUTE[E](부설연구소) > RESEARCH INSTITUTE OF ENGINEERING & TECHNOLOGY(공학기술연구소) > Articles
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