Gas direct contact type ice slurry preparation system

Abstract

The invention discloses a gas direct contact type ice slurry preparation system. The system comprises three parts of refrigerant circulation, gas circulation and ice-making solution circulation, wherein a refrigerating medium adopts an environmental-friendly gas, such as air, nitrogen, and the like. Compared with a liquid refrigerating medium, the gas with same mass can generate more air bubbles in an ice slurry generator so as to increase the heat exchange area; the gas is easier to realize higher gas inlet speed so as to promote the diffusion of the air bubbles; the temperature distribution in the ice slurry generator is more even, the local supercooling is prevented, and the probability of generating an ice blockage is reduced. In addition, a first-class heat exchanger is adopted in the system. A refrigeration system evaporator is arranged in the first-class heat exchanger, and a refrigerating medium gas directly contacts with solution (ethanediol solution) in the first-class heat exchanger to exchange heat. Because of the intensive disturbance function of the gas, the convection heat exchanging factor of the refrigerating medium and the evaporator is greatly increased, and the problem of larger heat resistance caused by direct convection heat exchange of the gas and the refrigerating system evaporator is solved. Accordingly, the gas with higher temperature passes through refrigerating medium solution with lower temperature, thereby achieving the aim for removing water in the gas and further reducing the probability of the ice blockage of the system.

Description

technical field [0001] The invention relates to the field of energy air conditioning, in particular to a gas direct contact ice slurry production system. Background technique [0002] The traditional direct contact method to produce ice slurry refers to the direct contact between liquid refrigerant and ice-making solution to exchange heat to produce ice slurry. However, this method has the following problems: 1. Ice blockage is prone to occur at the nozzle of the ice slurry generator 2. Part of the water vapor may be entrained in the refrigerant vapor and enter the refrigeration system, which will damage the performance of the refrigeration system 3. The refrigerant may entrain part of the lubrication Oil entering the ice generator destroys heat transfer in the ice generator and starves the compressor of oil. Therefore, the use of gaseous refrigerants can be considered. However, when the gas carrier refrigerant exchanges heat with the evaporator of the refrigeration system...

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Problems solved by technology

However, this method has the following problems: 1. Ice blockage is prone to occur at the nozzle of the ice slurry generator 2. Some water vapor may be entrained in the refrigerant vapor and enter the refrigeration system, which will damage the performance of the refrigeration system 3. The refrigerant may entrain part of the lubrication Oil entering the ice generator destroys heat transfer in the ice generator and starves the compressor of oil

However, when the gas carrier refrigerant exchanges heat with the evaporator of the refrigeration system, the thermal resistance is too large, which affects the overall performance of the system

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