A system and method for producing low-temperature water by microporous flash evaporation

Abstract

The invention discloses a system and method for producing low-temperature water by microporous flash evaporation, including a water tank, a booster pump, a return pump, a condensate tank, a vacuum pump, a condenser, a compressor, a microporous hydrophobic material component, and a pressure reducing valve , Radiator. The invention is based on Laplace's law, that is, the saturated vapor pressure on the surface of the convex droplet is higher than that of the flat droplet, and the water is pressurized to penetrate the microporous hydrophobic material assembly to form a convex droplet, so as to improve the flash evaporation of water reduce the compression ratio of the compressor. The invention uses water as the refrigerant, and the system has remarkable environmental protection characteristics; the microporous hydrophobic material component is used to obtain convex water droplets, and the saturation pressure and specific volume when the water is flashed can be changed, which can significantly reduce the operating energy consumption of the system and the size of the compressor equipment . The system for preparing low-temperature water by microporous flash evaporation of the present invention has the advantages of energy saving, environmental protection and the like.

Description

technical field [0001] The invention relates to a system for producing low-temperature water, in particular to a system and method for producing low-temperature water through microporous flash evaporation technology, and belongs to the technical field of refrigeration. Background technique [0002] At present, most of the refrigerants in the refrigeration field use freon refrigerants, which have poor environmental performance and have more or less ozone layer destruction or greenhouse gas effects. As a natural working fluid, water (refrigerant code: R718) has significant advantages in terms of system cost, safety, environmental protection and thermal performance. Patent CN106705308A discloses a mechanical flash-type air-conditioning and refrigeration system, which uses water as a refrigerant to produce low-temperature cold water for air-conditioning through mechanical flashing. The system has good thermal cycle performance, but due to the ratio of water vapor Large volume, ...

AI Technical Summary

Problems solved by technology

Patent CN106705308A discloses a mechanical flash-type air-conditioning and refrigeration system, which uses water as a refrigerant to produce low-temperature cold water for air-conditioning through mechanical flashing. The system has good thermal cycle performance, but due to the ratio of water vapor Large volume, for example, the specific volume of saturated water vapor at 7°C is 129m 3 / kg, while the steam specific volume of R134a under the same temperature conditions is 0.054m 3 / kg, the steam specific volume of R407C is 0.042m 3 / kg, it can be seen that the specific volume of water vapor is much larger than the gas specific volume of freon refrigerants at the same temperature, which leads to the need for a steam compressor with a large flow rate in the water refrigerant system, and the high investment in system equipment limits the water refrigerant to a certain extent Popularization and Application of Refrigeration System

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