Direct Contact With The Spray Of Ice Slurry Preparation Technology

Ice storage air conditioning is a technology which uses low price electricity in the evening to drive refrigerating systems, and which takes advantage of the characteristics of the change heat storage materials to produce the coolness and storage it. Then it is released when electric price or electric load is high in daytime to supply the needs of air conditioning or productive technology.This paper reviews direct contact ice storage technology at home and abroad, and puts forward to direct jet-type ice making technology based on those idea.Direct jet-type ice storage technology conbines the evaporator with ice making tank together, and jets the refrigerant into the tank directly; heat exchange between water and low temperature refrigerant happened and small ice crystal is created, in this way it can produce ice slurry.Direct jet-type ice making device is designed. It makes heat exchanger and ice making tank as a whole, which an unique structure for ice making tank and ice making device is used, and gets use of pre-cooling and injection technology; in this way productivity and the reliability of the device is advanced.The paper puts forward to direct jet-type droplet heat transfer theoretical model, compared with different situations using Matlab. The model provides theoretical basis and reference for its design and application. The paper puts forward to those theories including droplet heat transfer theory, droplet resident time theory, droplet heat transfer area theory etc. those theories solve temperature distribution adapting to time, the relationship between ice making capability and injection characteristics, calculative method for heat transfer capability etc.The paper also sums up characteristic of ice slurry in the pipe, friction resistance and heat transfer relationship based on reference at home and abroad, and analyses dynamic characteristics and heat transfer function of ice slurry in the air conditioning.Direct jet-type ice slurry device is built. The paper introduces preparing for the research, how to add refrigeration, how to check the device during working; put forward to ice storage tank improving method and refrigeration replace method; after experiment supply theory and experimental research. Finally get the wanted effect, get liquidity ice slurry and ice block does not happen.Although the paper put forward reliability theory for direct jet-type ice making device, the technology has many works to be done in the future.Believe direct Jet-type ice slurry maker technology will become a mainstream at 21 century with development of the technology.