Experimental testing of a lab-scale adsorption chiller using a novel selective water sorbent 鈥渟ilica modified by calcium nitrate鈥?/span>

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• 作者：Angelo Freni^a ; ^{angelo.freni@itae.cnr.it} ; Alessio Sapienza^a ; Ivan S. Glaznev^b ; Yuriy I. Aristov^b ; Giovanni Restuccia^a
• 关键词：Adsorption chiller ; Water ; Silica gel ; Additive ; Nitrate ; Calcium ; Evaluation ; Performance
• 刊名：International Journal of Refrigeration
• 出版年：2012
• 期刊代码：92_01407007
• 类别：et
• 出版时间：May, 2012
• 卷：35
• 期：3
• 页码：518-524
• 文件大小：609 K

摘要

In this paper, a novel composite water sorbent 鈥渟ilica modified by calcium nitrate鈥?(SWS-8L) has been tested for utilization in adsorption chillers driven by low-temperature heat. The isosteric diagram of the working pair under investigation has been calculated from experimental adsorption data measured at equilibrium. The equivalent specific heat of the sorbent as a function of the water loading was experimentally measured by a calorimetric technique. Thermodynamic cooling COP was estimated to be 0.51-0.71, with desorption temperature lower than 90 掳C. Real performance was measured by testing a SWS-8L based sorbent bed in a lab-scale adsorption chiller. With this aim, SWS-8L grains were embedded inside a compact aluminium heat exchanger with high thermal efficiency. Experimental cooling COP, mass specific cooling power SCP and volumetric specific cooling power VSCP obtained are 0.18-0.31 (cycle time 10 min), 190-389 W/kg dry sorbent and 104-212 W/dm³, respectively.