Effect of convective heat transfer coefficient and bubble diameter on the performance of phase change cold energy storage by foam freezing

Jiamin Wang; Juan Xie; Haitao Ding; Jun Wang

doi:10.1117/12.3004459

25 September 2023 Effect of convective heat transfer coefficient and bubble diameter on the performance of phase change cold energy storage by foam freezing

Jiamin Wang, Juan Xie, Haitao Ding, Jun Wang

Author Affiliations +

Proceedings Volume 12788, Second International Conference on Energy, Power, and Electrical Technology (ICEPET 2023); 127881L (2023) https://doi.org/10.1117/12.3004459
Event: Second International Conference on Energy, Power, and Electrical Technology (ICEPET 2023), 2023, Kuala Lumpur, Malaysia

Abstract

Phase change material (PCM) has high energy storage density, but the freezing rate decreases with the increase of frozen thickness. Foam freezing can sharply increase the freezing rate. In this research, the effects of bubble radius and convective heat transfer coefficient on freezing process were discussed. It was found that with the decrease of bubble radius and the increase of convective heat transfer coefficient, the shape of instantaneous freezing rate curve changed from linear dominant to C-type and then to L-type. With the increase of convective heat transfer coefficient, the opening direction of C-type curve of foam outlet temperature changed reversely, and the curves all intersected a specific area. The convective heat transfer coefficient was near the critical point of natural convection and light forced convection.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Jiamin Wang, Juan Xie, Haitao Ding, and Jun Wang "Effect of convective heat transfer coefficient and bubble diameter on the performance of phase change cold energy storage by foam freezing", Proc. SPIE 12788, Second International Conference on Energy, Power, and Electrical Technology (ICEPET 2023), 127881L (25 September 2023); https://doi.org/10.1117/12.3004459

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KEYWORDS

Bubbles

Foam

Ice

Convection

Resistance

Thermal effects

Air temperature

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