Effect of the Dry out in Tube Bundles on the Heat Transfer Performance of Falling Film Evaporators

摘要

In this paper, the dryout occurrence was discussed on the tube bundles in falling film evaporators for refrigeration. A numerical simulation was carried out on the bundles of horizontal tubes based on the distributed parameter method. In the simulation, the liquid flow rate and maldistribution on the tube bundles were analyzed about their influences on the dry patch formation and heat transfer performance of evaporators. These results are helpful to guide the design of falling film evaporators.