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Novel ammonia sorbents "porous matrix modified by active salt" for adsorptive heat transformation : 3. Testing of "BaCl2/vermiculite" composite in a lab-scale adsorption chiller

By J. V. Veselovskaya, Robert E. Critoph, Roger Thorpe, Steven J. Metcalf, M. M. Tokarev and Yu. I. Aristov

Abstract

A composite adsorbent composed of BaCl2 impregnated into expanded vermiculite has been synthesized and tested in a laboratory scale adsorption chiller. Previous work has established the promising theoretical performance of this adsorbent with ammonia as a refrigerant, in terms of equilibrium uptake, suitable equilibrium temperatures for use in air conditioning applications and good reaction dynamics. Analysis of the adsorption phase revealed a simple exponential approach to equilibrium uptake which was not previously observed in larger scale experiments. It was demonstrated that this material can provide effective operation of the chiller using a low potential heat source (80-90 degrees C) giving COP as high as 0.54 +/- 0.01 and SCP ranging from 300 to 680 W/kg,. The specific cooling power depends strongly on the driving temperature difference and the cycle duration. (C) 2010 Elsevier Ltd. All rights reserved

Topics: QC, TJ
Publisher: Pergamon-Elsevier Science Ltd.
Year: 2010
DOI identifier: 10.1016/j.applthermaleng.2010.01.035
OAI identifier: oai:wrap.warwick.ac.uk:5874
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