Numerical analysis and experimental investigation into the performance of a wire-on-tube condenser of a retrofitied refrigerator

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dc.contributor.authorAlam Mollik, Md. Shahin
dc.date.accessioned2015-09-03T07:21:01Z
dc.date.available2015-09-03T07:21:01Z
dc.date.issued2005-04
dc.description.abstractThe present thesis discusses (a) the analysis of a wire-on-tube condenser under varying operating conditions of free convection using FEM where Galerkin's weighted residual method is used to minimize the errors, 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 ±1 0%. The coefficient of performance (COP) of the refrigeration cycle was 2.62 when refrigerant R-12 was used. Using refrigerant R-134a in the retrofitted cycle the COP marginally improved to 2.65. 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.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/1158
dc.language.isoenen_US
dc.subjectExperimental investigationen_US
dc.subjectWire-on-tube condenseren_US
dc.subjectRetrofitied refrigeratoren_US
dc.titleNumerical analysis and experimental investigation into the performance of a wire-on-tube condenser of a retrofitied refrigeratoren_US
dc.typeThesisen_US
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