Heat source driven vacuum refrigerating system

Abstract

The invention discloses a heat source driven vacuum refrigerating system, which comprises an evaporation chamber, an air extractor and a condensation chamber, wherein the extraction opening of the air extractor is communicated with a steam outlet of the evaporation chamber, the gas outlet of the air extractor is communicated with the inlet of the condensation chamber, and the air extractor comprises a centrifugal turbine and a centripetal turbine which is coaxial with the centrifugal turbine; power gas sequentially passes by a radial communicating port and an axial communicating port of the centripetal turbine; and the steam outlet of the evaporation chamber is communicated with the axial communicating port of the centrifugal turbine, and the inlet of the condensation chamber is communicated with the radial communicating port of the centrifugal turbine. The vacuum refrigerating system utilizes the power gas to drive the centripetal turbine so as to drive the centrifugal turbine to carry out vacuum-pumping. The vacuum refrigerating system takes water as a working medium, does not have depletion ozone and greenhouse gas emission, and has the advantage of environmental friendliness. A high-speed turbomachine is used, so the volume flow is large, the defect of small flow due to the small density of water which is taken as the working medium can be made up, and meanwhile, the vacuum refrigerating system has the advantages of simple and compact structure and the like.

Description

technical field [0001] The invention relates to the technical field of refrigeration, in particular to a vacuum refrigeration system driven by a heat source. Background technique [0002] Vacuum refrigeration is a technology that has been around for decades. Its basic principle is to use the method of vacuuming and depressurization to make the liquid in the object to be cooled undergo adiabatic evaporation in a vacuum (low pressure) state, and the evaporation process absorbs heat to cool down the object to be cooled. The outstanding advantage of vacuum refrigeration technology is the fast refrigeration speed, which is mainly used for rapid refrigeration of food, fruit and other items. Vacuum refrigeration generally uses water as the working medium, which has the advantage of environmental protection compared with the common air conditioning system using Freon working medium. The vacuum refrigeration system is generally composed of vacuum chamber, evaporation chamber, conde...

AI Technical Summary

Problems solved by technology

The coefficient of performance COP (conversion ratio between energy and heat, referred to as energy efficiency ratio) of ejector refrigeration technology is too low, generally lower than 0.5, and due to the limited carrying capacity of the ejector, it is often not suitable to use water with low gas density as the working medium , and its applicability is extremely limited

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