A novel louvered fin design to enhance thermal and drainage performances during periodic frosting/defrosting conditions

摘要: Abstract The retention water on fin surface can significantly degrade the thermal performance of heat exchangers under periodic frosting/defrosting conditions, which also leads to a decrease in energy efficiency air-source pumps. A novel louvered design was suggested improve drainage and exchanger. had an asymmetric louver arrangement by flattening two louvers leading edge. formed markedly decreased transfer rate conventional symmetric fins re-frosting cycles. On other hand, improved water, enhanced rate. To identify reason difference between geometries, additional experiments were carried out with enlargement models. improvement originated from lowered tension droplet.