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Please use this identifier to cite or link to this item: http://repository.fuoye.edu.ng/handle/123456789/1256

Title: Design and Performance Evaluation of a Cooler Refrigerating System Working with ‎Ozone Friendly Refrigerant
Authors: Bolaji, Bukola Olalekan
Akintaro, A.O.
Alamu, O.J.
Olayanju, T.M.A.
Keywords: Design and performance of refrigerator
ozone-friendly refrigerant
refrigerant charge
cooler refrigerator‎
Issue Date: 2012
Publisher: The Open Thermodynamics Journal, Sharjah, U.A.E‎
Series/Report no.: Volume 6;No. 1, pp. 25-32
Abstract: In this study, a cooler refrigerating system was designed, constructed and tested with ‎various charge quantities of an ozone friendly hydro-fluorocarbon refrigerant (R134a) as ‎working fluid. The results obtained showed that the design temperature and pull-down time ‎set by International Standard Organisation (ISO) for small refrigerator were early achieved ‎with refrigerant charges of 100 and 120 g than with 60 and 80 g charges. Approximately the ‎same pull-down time and minimum temperature of -14oC were obtained with refrigerant ‎charges of 100 and 120 g. Discharge pressure is about the same for 60, 80 and 100 g ‎refrigerant charges, but significant increase in discharge pressure was observed as the ‎refrigerant charge increased to 120 g. The rate of increase in the refrigerating capacity and the ‎COP with respect to evaporator temperature for refrigerant charge of 60 g to 100 g are higher ‎than that for refrigerant charge of 120 g. Highest refrigerating capacity and COP of 4.404 kW ‎and 3.1, respectively, were obtained in the cooler refrigerator with 100 g charge. Generally, ‎the best performance of the cooler was obtained with refrigerant charge of 100 g and increase ‎in the charge beyond 100 g affected the performance of the cooler negatively.
URI: http://repository.fuoye.edu.ng/handle/123456789/1256
Appears in Collections:Mechatronics and Mechanical Journal Publications

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