Water heating and dehumidification with heat pump utilizing solar, ambient and waste heat

Hawlader, M. N. A., Amin, Zakaria Mohd., Ye, Shaochun, & Win, Kyaw Thura (2009) Water heating and dehumidification with heat pump utilizing solar, ambient and waste heat. In ASME 2009 3rd International Conference on Energy Sustainability, Volume 2, ASME, San Francisco, CA, USA, pp. 817-824.

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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 twophase 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, the 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 oC. In the condenser side, water at 60 oC 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.

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ID Code: 75070
Item Type: Conference Paper
Refereed: Yes
Keywords: Solar energy, heat pump, space cooling, water heating, drying
DOI: 10.1115/ES2009-90249
ISBN: 9780791848906
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 15 Aug 2014 04:33
Last Modified: 21 Aug 2014 01:59

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