Please use this identifier to cite or link to this item: https://doi.org/10.1115/ES2009-90249
Title: Water heating and dehumidification with heat pump utilizing solar, ambient and waste heat
Authors: Hawlader, M.N.A. 
Amin, Z.M.
Shaochun, Y.
Win, K.T.
Keywords: Drying
Heat pump
Solar energy
Space cooling
Water heating
Issue Date: 2009
Source: Hawlader, M.N.A.,Amin, Z.M.,Shaochun, Y.,Win, K.T. (2009). Water heating and dehumidification with heat pump utilizing solar, ambient and waste heat. Proceedings of the ASME 3rd International Conference on Energy Sustainability 2009, ES2009 2 : 817-824. ScholarBank@NUS Repository. https://doi.org/10.1115/ES2009-90249
Abstract: The low temperature operation of a heat pump makes it an excellent match for the use of solar energy. At the National University of Singapore, a solar assisted heat pump system has been designed, fabricated and installed to provide water heating and drying. The system also utilizes the air con waste heat, which would normally be released to atmosphere adding to global warming. Experimental results show that the two-phase unglazed solar evaporator- collector, instead of losing energy to the ambient, gained a significant amount due to low operating temperature of the collector. As a result, the collector efficiency attains a value greater than 1, when conventional collector equations are used. With this evaporator-collector, me system can be operated even in the absence of solar irradiation. The waste heat was collected from an air-con system, which maintained a room at 20-22°C. In me condenser side, water at 60°C was produced at a rate of 3 liter/minute and the drying capacity was 2.2kg/hour. Maximum COP of the system was found to be about 5.5. Copyright © 2009 by ASME.
Source Title: Proceedings of the ASME 3rd International Conference on Energy Sustainability 2009, ES2009
URI: http://scholarbank.nus.edu.sg/handle/10635/51667
ISBN: 9780791848906
DOI: 10.1115/ES2009-90249
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