Heat transfer behavior of a combined sensible-latent thermal energy storage system for high temperature appilications

doi:10.12028/j.issn.2095-4239.2017.0061

Abstract

Abstract: Thermal energy storage (TES) is a key technology to resolve issues of dispatchability and load shift of renewable energy utilization. In this paper, we present an experimental study on a high-temperature combined sensible-latent TES, which uses air as heat transfer fluid, alumina rich ceramic balls as sensible storage material and salt as latent heat storage material. The results showed that the thermal stability of packed-bed based TES system was improved during both charging and discharging processes when PCM was used because the PCM released heat at an almost constant temperate at the phase point. The cyclic efficiency of the combined sensible-latent TES system was about 75%, which was higher than the sensible TES system.

Key words: molton salt phase change pipe, sensible-latent thermal storage system, thermal stability, cyclic efficiency

WANG Yan, BAI Fengwu, YANG Bei, WANG Zhifeng. Heat transfer behavior of a combined sensible-latent thermal energy storage system for high temperature appilications[J]. Energy Storage Science and Technology, 2017, 6(4): 719-725.

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