Abstract
Abstract In this paper is described an apparatus for the direct determination of condensing-vapor heat-transfer film coefficients in which precision measuring methods are employed. The conditions are closely controlled and can be made nearly ideal if so desired. Among the factors affecting condensation which may be studied in this apparatus are condensing temperature, film-temperature drop, noncondensable gas, liquid load on tubes, and condensing-surface condition. Included herein are data on the condensation of saturated Freon-12 under ideal conditions on a plain horizontal tube at various vapor temperatures and film-temperature drops.
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