Title
Condensation of HFC134a and HFC404A in a smooth and microfin tube,Used
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The purpose of this work was to study the condensation heat transfer and pressure drop characteristics ofHFC134a in a microfined tube with an 18 degree helix angle and to compare them to those in a smooth tube for various operating conditions.The experimental test facility is designed, developed and is used to determine the condensation HTC and pressure drop in smooth and microfin tubes for various HFC refrigerants namely HFC134a, R404A, R407C, R507A. The experimentation covers wide range of operating parameters such as mass flux and condensing temperatures. The instrumentations used for measurements are calibrated from recognized calibration centres. The hermetically sealed compressor is used for circulating refrigerant; effect of oil present in the refrigerant during condensation is also taken into account. The condensation of HFC134a and R404A in smooth and microfin tubes are measured and obtained the values of condensation HTCs and pressure drops for different mass flux and condensing temperatures
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