Abstract:Experimental investigation on flow boiling heat transfer characteristics of R404A (R125/ R143a/R134a) was carried in a smooth horizontal tube of 7.49-mm inner diameter. The tested conditions were similar to those present in the evaporator of supermarket display cases, refrigerated cabinets, laboratory freezers, etc. The heat transfer coefficients along the length of the test section were experimentally measured under varied heat flux conditions between 4 and 19 kW m 2 , mass flow rate between 2.5 and 4.5 g s 1… Show more
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