Heat Exchange Intensification in the Case of Film Condensation on the Outer Surface of Horizontally Knurled Tubes

The results of an experimental investigation of the heat exchange in film condensation of the refrigerants R-22, R-142, and R-717 (ammonia) on horizontal knurled and smooth tubes are presented. The application of knurled tubes of this structure as a heat transfer surface made it possible to increase the coefficient of heat transfer.

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