期刊
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID
卷 34, 期 1, 页码 148-158出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijrefrig.2010.07.005
关键词
Air-conditioning; Desiccant system; Desiccant wheel; Optimisation; Performance
Solar desiccant-based air-conditioning has the potential to significantly reduce cost and/or greenhouse gas emissions associated with cooling of buildings. Parasitic energy consumption for the operation of supply fans has been identified as a major hindrance to achieving these savings. The cooling performance is governed by the trade-off between supplying larger flow-rates of cool air or lower flow-rates of cold air. The performance of a combined solid desiccant-indirect evaporative cooler system is analysed by solving the heat and mass transfer equations for both components simultaneously. Focus is placed on varying the desiccant wheel supply/regeneration and indirect cooler secondary/primary air-flow ratios. Results show that for an ambient reference condition, and 70 degrees C regeneration temperature, a supply/regeneration flow ratio of 0.67 and an indirect cooler secondary/primary flow ratio of 0.3 gives the best performance with COP(e) > 20. The proposed cooling system thus has potential to achieve substantial energy and greenhouse gas emission savings. (C) 2010 Elsevier Ltd and IIR.
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