This paper presents a simplified test method that was developed to allow preconfigured solar domestic hot water systems that use natural convection/thermosyphon heat exchangers to be characterized. The results of this test method produce performance coefficients for simple empirical expressions that describe the fluid flow and heat transfer in the heat-exchange loop. These empirically derived coefficients can be used as an input to a general simulation routine that allows overall system performance to be determined for various loads and climatic conditions. To illustrate the test procedure, results are presented for a typical heat exchanger under a range of operational conditions.
Issue Section:
Technical Briefs
1.
Parent
, M. G.
, Van der Meer
, Th. H.
, and Hollands
, K. G. T.
, 1990, “Natural Convection Heat Exchangers in Solar Water Heating Systems: Theory and Experiment
,” Sol. Energy
0038-092X, 45
, pp. 43
–52
.2.
Purdy
, J. M.
, Harrison
, S. J.
, and Oosthuizen
, P. H.
, 1998, “Thermal Evaluation of Compact Heat Exchangers in a Natural Convection Application
,” Proceedings of the 11th IHTC, Heat Transfer 1998
, Korea, Vol. 6
, pp. 305
–310
.3.
Lin
, Q.
, Harrison
, S. J.
, and Lagerquist
, M.
, 2000, “Analysis and Modeling of Compact Heat Exchangers for Natural Convection Application
,” EuroSun 2000
, Copenhagen, Denmark.4.
Dahl
, S. D.
, and Davidson
, J. H.
, 1997, “Performance and Modeling of Thermosyphon Heat Exchangers for Solar Water Heaters
,” ASME J. Sol. Energy Eng.
0199-6231, 119
, pp. 193
–199
.5.
Liu
, W.
, and Davidson
, J. H.
, 1999, “Comparison of Natural Convection Heat Exchangers for Solar Water Heating Systems
,” Solar 99, 1999 American Solar Energy Conference
, Portland, ME.6.
Fraser
, K. F.
, Hollands
, K. G. T.
, and Brunger
, A. P.
, 1995, “An Empirical Model for Natural Convection Heat Exchangers in Solar Heating Systems
,” Sol. Energy
0038-092X, 55
(2
), pp. 75
–84
.7.
Kays
, W. M.
, and London
, A. L.
, 1984, Compact Heat Exchangers
, 3rd ed., McGraw-Hill
, New York
.8.
Carpenter
, A. M.
, and Harrison
, S. J.
, 1989, “A Test Bench Apparatus for Solar DHW System Optimization
,” 15th Annual Conference of the Solar Energy Society of Canada
, Toronto, Canada.9.
Cruickshank
, C. A.
, and Harrison
, S. J.
, 2006, “Experimental Characterization of a Natural Convection Heat Exchanger for Solar Domestic Hot Water Systems
,” Proceedings of ISEC 2006, Annual Meeting of the American Society of Mechanical Engineers (ASME)
, Denver, Colorado.10.
University of Wisconsin Solar Energy Laboratory, 2000, TRNSYS: A Transient Simulation Program, ver. 15, Madison, WI.
Copyright © 2009
by American Society of Mechanical Engineers
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