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Heat Pipe Science and Technology, An International Journal

ISSN Print: 2151-7975
ISSN Online: 2151-7991

Archives: Volume 1, 2010 to Volume 8, 2017

Heat Pipe Science and Technology, An International Journal

DOI: 10.1615/HeatPipeScieTech.v6.i3-4.100
pages 229-239

EVALUATION OF CaCl2−SILICA GEL SORBENT FOR WATER SORPTION COOLING SYSTEMS

Claire McCague
Laboratory for Alternative Energy Conversion (LAEC), School of Mechatronic Systems Engineering, Simon Fraser University, 250-13450 1 02nd Avenue, Surrey, BC, Canada, V3T 0A3
Khorshid Fayazmanesh
Laboratory for Alternative Energy Conversion (LAEC), School of Mechatronic Systems Engineering, Simon Fraser University, 250-13450 1 02nd Avenue, Surrey, BC, Canada, V3T 0A3
Cecilia Berlanga
Laboratory for Alternative Energy Conversion (LAEC), School of Mechatronic Systems Engineering, Simon Fraser University, 250-13450 1 02nd Avenue, Surrey, BC, Canada, V3T 0A3
Majid Bahrami
Laboratory for Alternative Energy Conversion (LAEC), School of Mechatronic Systems Engineering, Simon Fraser University, #4300, 250-13450 102 Avenue, Surrey, BC, Canada V3T0A3

ABSTRACT

Hygroscopic salts supported by a mesoporous matrix for improved mass transport are promising sorbents for water-based sorption cycles that operate at low pressure. In this study, loose grain composites of CaCl2 supported by mesoporous silica gels with four distinct pore size distributions were prepared and compared with AQSOA FAM-Z02, a silicoaluminophosphate zeolite desiccant. A salt in silica gel sorbent consolidated with graphite flakes and binder was also analyzed. The sorbents were evaluated with a volumetric nitrogen physisorption porosimeter and thermogravimetric water vapor sorption analyzer. The hygroscopic salt filled 56−60% of the open pore volume of the mesoporous silica gel supports. Water uptake capacity of the CaCl2/silica gel sorbent was up to 0.33 g per gram of dry sorbent at 12 mbar and 35°C, and sample performance was consistent through 200 wetting−drying cycles.


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