Heat-pump/energy-store using silica gel and water as a working pair

M. A. Tahat

Applied Energy, 2001, vol. 69, issue 1, 19-27

Abstract: The possibilty of using silica gel and water as a reversible pair, in a thermochemical heat-pump/energy-store has been studied theoretically and experimentally during both heating and cooling modes. With silica gel absorbing water by 25±2% of the dry silica gel's weight, the heat of adsorption and the heat of wetting of 2712.43±30 kJ/kg SiO2 and 94.43± 15 kJ/kg SiO2 have been achieved respectively. The concentration rate for the two reaction pair was investigated and a general relationship that governed the adsorption rate with time has been deduced.

Date: 2001
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