In a case study project an air-cooled heat pump unit was retrofitted with a desuperheater to provide service hot water in addition to chilled water for comfort space cooling in a 24-room holiday villa located in a subtropical region. The retrofit project is described, and system operating performance and energy efficiency are reported. A standard cooling tower was used to extract free heat from ambient air in transitional seasons, thus eliminating the need for electric back-up heating for service hot water.
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References
1.
Ying W.M.Performance of room air conditioner used for cooling and hot water heatingASHRAE Trans.95(1) 441-444 (1989)
2.
Toh K.C. and Chan S.K.Thermosiphon heat recovery from an air conditioner for a domestic hot water systemASHRAE Trans.99(1) 259-264 (1993)
3.
Bong T.Y. , Hawlader M N A and Mahmood W.The prospect of incorporating desuperheaters to room air conditioners for tropical applicationASHRAE Trans.94(1) 340-349 (1988)
4.
D'Valentine M.L. and Goldschmidt V.W.Desuperheater water-heater and air-to-air heat pump system: representative performance dataASHRAE Trans.96(2) 417-421 (1990)
5.
Lee A H W and Jones J.W.Performance data for a desuperheater integrated to a thermal energy storage systemJ. Energy Eng.92(1) 6-25 (1995)
6.
Kaushik S.C. and Singh M.Feasibility and design studies for heat recovery from a refrigeration system with canopus heat exchangerHeat Recovery and CHP15(7) 665-673 (1995)
7.
Chan S.K. and Toh K.C.Transient simulation of direct heat recovery from an air conditioning system for water heatingProc. ASHRAE Far East Conf. on Air Conditioning in Hot Climates, Kuala Lumpur , Malaysia ppl-4( 1989)
8.
Perman M.Heat pump water heaters - a better water heating approach?ASHRAE Trans.90(2) 91-203 (1984)
9.
Olszewski M.Economic viability of heat pump desuperheaters for supplying domestic hot waterASHRAE Trans.90(2) 169-174 (1984)
10.
Baxter V.D.Comparison of field performance of a high-efficiency heat pump with and without a desupcrheater water heaterASHRAE Trans.90(2) 180-190 (1984)
11.
Lin J.Y. , Lou J.H. and Chuah Y.K.The technology development of heat pump water heaterProc. ASME Annual Winter Meeting , Chicago pp139-145 (Nov-Dec 1988)
12.
Cook R.E. , Davidson M.J. , D'Valentine M. and Goldschmidt V.W.A simple method to determine the yearly consumption of a combined space- and water-heating appliance with a heat pump and desuperheaterASHRAE Trans.92(2) 399-408 (1986)
13.
Erlandson C.W.Heat recovery water heatingProc. Conf. Waste Heat Recovery for Energy Conservation - Residential and Light Commercial Heat Pumps, Air Conditioning, and Refrigeration Systems , Purdue University pp101-108 (1980)
