Please use this identifier to cite or link to this item: http://dspace.unimap.edu.my:80/xmlui/handle/123456789/33893
Title: Numerical analysis and experimental investigation into the performance of a wire-on-tube condenser of a retrofitted refrigerator
Authors: Ameen, Ahmadul
Mollik, , S. A.
Mahmud, Khizir
Ghulam, Abdul Quadir, Prof. Dr.
Seetharamu, Kankanhally N.
manumeen@yahoo.com
gaquadir@unimap.edu.my
Keywords: Household refrigerator
Condenser
Survey
Experiment
Heat transfer
Free convection
R-134a
CFD
Issue Date: 2006
Publisher: Elsevier Ltd.
Citation: International Journal of Refrigeration, vol. 29(3), 2006, pages 495-504
Abstract: The present paper discusses (a) the analysis of a wire-on-tube condenser under varying operating conditions of free convection using FEM, and (b) experimental verification of the performance of two wire-on-tube condensers in a retrofitted domestic refrigerator using refrigerant R-134a. The study is motivated by the desire to investigate if the wire-on-tube condensers used in R-12 based refrigerators could be used in a modified refrigerator using R-134a refrigerant. Experiments were conducted in a climate chamber under controlled and varying ambient temperatures and mass flow rates to determine the locations where phase change occurs and the degree of subcooling achieved. In terms of initial and final phase change point locations the predicted results agree with the experimental results to within ±10%. The analysis and the experiments also lead to the information about the adequacy of the number of tubes for complete condensation of the refrigerant vapour under given operating conditions. The methodology can be used as a design tool for the design of wire-on-tube condenser of a small refrigerator as well as the suitability of specific decommissioned condensers for use in a retrofitted refrigerator. It also indicates that R-12 based refrigerators using wire-on-tube condensers retrofitted with R-134a compressor and refrigerant deserve and warrant further studies for adoption.
Description: Link to publisher's homepage at http://www.sciencedirect.com/
URI: http://dspace.unimap.edu.my:80/dspace/handle/123456789/33893
ISSN: 0140-7007
Appears in Collections:Ghulam Abdul Quadir, Prof. Dr.



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