Enhanced Film Condensation Heat Transfer of Natural Gas Renforcement De La Condensation Et Du Transfer Du Chaleur Du Gas Naturel

摘要

Film condensation heat transfer of natural gas along V-longitudinal groove tube is investigated. A set of experimental appartus was built to observe performance of laminar film condensation of pure methane vapor, a main component of natural gas. Experiment was carried out by using two kinds of heat transfer surface, one is a bube of smooth surface and the other of V-longitudinal groove tube. The heat transfer data of smooth tube agrees Nusselt's solution quite well and the condensation heat transfer coefficient of V-longitudinal groove tube is 3 approx 8 times larger than that of the smooth surface. In order to explain the fact of the heat transfer enhancement of condensing surface, a mathematics model was proposed for studying condensation characterizes along V-longitudinal groove tube, the maximum deviations between the prediction values and the experimental data is 15