Water vapor adsorption in silica gel for thermal energy storage application

Ye Hua, Amanda Godin, F. Handan Tezel*

Department of Chemical and Biological Engineering, University of Ottawa, 161 Louis-Pasteur, Ottawa, Ontario, K1N 6N5, Canada

Adv. Mater. Lett., 2019, 10 (2), pp 124-127

DOI: 10.5185/amlett.2019.2181

Publication Date (Web): Dec 19, 2018

E-mail: Handan.Tezel@uottawa.ca

Abstract


Thermal energy storage (TES) by water vapor adsorption process has attracted increasing interest for its thermal applications such as space heating and cooling. However, the experimental energy density of the adsorbents may vary as the operating system and conditions change, which could be much lower than the theoretical energy density. In this manuscript, an experimental system has been designed and built to examine the effects of the regeneration temperature and relative humidity (RH) on a commercial silica gel material’s performance as adsorption TES material. The experimental energy density under different operating conditions were calculated. Up to 25 adsorption-desorption cycles were performed to examine the stability of the material and the repeatability of the results. 

Keywords

Thermal energy storage, water vapor adsorption, energy density, breakthrough tests.

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