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Proceedings of Symposium on Energy Engineering in the 21<sup>st</sup> Century (SEE2000) Volume I-IV

ISSN:
1-56700-132-7 (Print)

MECHANISM OF HEAT AND MASS TRANSFER DURING GAS HYDRATE COOL STORAGE PROCESS

Liquan Xiao
Institute of Chemical Engineering South China University of Technology

Shiping Wang
Chemical Engineering Research Institute South China University of Technology, Guangzhou, 510641, China

Abstract

Gas hydrate cool storage systems have been developed since the end of 1980s. Compared with the prevalent ice-storage systems, gas hydrate cool storage systems are characterized by higher phase-change temperature and very large latent heat released during phase-change process. Higher phase-change temperature can avoid the decease of the COP of water-chiller unit and make the air-conditioning system more effective. This paper analyzed the complicated process of heat and mass transfer inside an indirect-contact gas hydrate cool-storage tank. It's indicated that condensation, evaporation and hydration are a combined and mutually-influenced process. A qualitative model is disgust to explain the behavior of hydrate cool storage.