Research progress of solution defrosting technologies for heat exchangers

This paper reviews the research status and latest breakthroughs of solution regeneration methods and technologies, and evaluates the development direction of solution defrosting technologies. The factors affecting solution spraying and regeneration are summarized through previous studies. The results show that the optimal frost suppression wind speed per unit windward area of solution spraying is 0.13 to 0.16 m/s. The influence of solution concentration on defrosting efficiency is summarized and analysed. It is concluded that when the solution mass fraction is 31% to 65%, the solution defrosting can meet the defrosting requirements, and when the solution mass fraction is 50%, the efficiency of the solution defrosting is the highest. Finally, the advantages and disadvantages of solution defrosting are analysed, and it is pointed out that solution defrosting can be used as a normalized auxiliary defrosting and frost suppression means to build a green defrosting environment, or a near zero frosting air-source heat pump system based on solution defrosting technology.