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The helically coiled tubes with two-phase flow are widely used as heat transfer equipment in power stations, chemical plants, nuclear reactors, refrigeration systems, and many others. This paper investigates experimentally the subcooled boiling heat transfer characteristics of R134a in vertical helically coiled tubes with heat flux varying from 0.1 to 14.5kWm−2, mass flux from 147.5 to 443.7kgm−2s...
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