Development of Latent Thermal Energy Storage Tanks Using Carbon-Fiber Cloths

Abstract

Latent thermal energy storage (LHTES) tanks where carbon-fiber cloths are used to extend the heat transfer area are developed. The tanks are set in an air-conditioning system in a building, and then the performances are evaluated using imitation and practical loads. The results are compared with those of the tanks where carbon fiber brushes are installed. As a result, the carbon cloths of 0.27vol%, exhibit the equivalent thermal performance to the carbon fiber brushes of 1.3vol% during the charge process. The thermal performance of the former is apparently superior to the latter. The effect of the orientation of the cloths in the tanks on the heat transfer rate is also investigated. However it has less influence on the charge and discharge characteristics of the tanks.