Recycle Effect on Cool-Thermal Discharge Systems from Ice Melting with Chilled Air Produced Under Complete Melt Removal and Specified Heat Fluxes on the Boundary

Abstract

This article discusses of the recycle effect on the heat transfer for producing chilled air in cool-thermal discharge systems by ice melting under constant heat flux and melt removal. The outlet chilled air temperature is investigated, and the heat transfer behavior coupled with moving boundary by direct contact of the ambient air at the ice surface under melt removal is analyzed. The required air mass velocity is estimated and indicates that the application of recycle effect on cool-thermal discharge systems enhances the heat transfer rate and thus the lower outlet chilled air temperature during on-peak daytime hours. Installing cool-thermal discharge systems with external recycle, at larger convective heat transfer rate than for a device without recycle, can often increase the discharge capacity of the existing system.

Acknowledgments

The authors wish to thank the National Science Council of the Republic of China for its financial support.