Barocaloric Material with High Thermal Conductivity for Room-Temperature Refrigeration

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  • 1. School of Energy & Environment, Southeast University, Nanjing 210096, China
    2. School of Mechanical Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China
    3. Birmingham Centre for Energy Storage, School of Chemical Engineering, University of Birmingham, Birmingham B15 2TT, UK
    4. Engineering Research Center of Building Equipment, Energy, and Environment, Ministry of Education, Nanjing 210096, China

Online published: 2023-11-26

Supported by

The work was supported by the Basic Research Program of Frontier Leading Technologies in Jiangsu Province (BK20202008).

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2023

Abstract

Barocaloric refrigeration technology, one of the caloric-effect refrigeration technologies, is drawing more and more attention. Neopentyl glycol (NPG) was reported to have a giant barocaloric effect, making it a potential barocaloric material. However, the high solid-solid (S-S) phase transition temperature and low thermal conductivity hinder the application of NPG in barocaloric refrigeration. This work lowers the S-S phase transition temperature and improves the thermal conductivity of the NPG-based barocaloric material. An NPG/TMP (TMP: Trimethylolpropane) binary system with an S-S phase transition temperature of 283.15 K is prepared, in which the mass ratio of TMP is 20%. Graphene is then added to the binary system to enhance thermal conductivity, and the optimal mass ratio of graphene was determined to be 5%. The thermal conductivity of this composite is 0.4 W/(m·K), increased by 110% compared to the binary system. To predict the effect of enhanced thermal conductivity on the cold-extraction process of the barocaloric refrigeration cycle, a numerical model is developed. The results show that the cold-extraction time of the barocaloric refrigeration cycle utilizing the composite with 5% graphene as the refrigerant is shortened by 50% compared with that using the binary system.

Cite this article

ZHU Liutao, DAI Zhaofeng, GAO Yuanzhi, WU Dongxu, WANG Changling, ZHAO Dongliang, SHE Xiaohui, DING Yulong, ZHANG Xiaosong . Barocaloric Material with High Thermal Conductivity for Room-Temperature Refrigeration[J]. Journal of Thermal Science, 2023 , 32(6) : 2115 -2125 . DOI: 10.1007/s11630-023-1867-y

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