Two-stage overlapped refrigeration low-temperature grade mixed refrigerant
A technology of mixed refrigerant and cascade refrigeration, applied in heat exchange materials, chemical instruments and methods, etc., can solve the problems of high potential value of greenhouse effect and poor mutual solubility of lubricating oil, so as to improve system reliability and enhance mutual solubility. , the effect of low global warming potential
Active Publication Date: 2015-03-25
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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Problems solved by technology
[0004] In view of this, the technical problem to be solved by the present invention is to overcome the defects of high greenhouse effect potential and poor miscibility with lubricating oil in the cascade refrigeration system of the prior art, and provide a low greenhouse effect potential , two-stage cascade refrigeration low-temperature grade mixed refrigerant with good miscibility with lubricating oil
Method used
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Embodiment 1
[0025] Example 1: ethylene with a molar concentration of 20% and perfluoroethane with a molar concentration of 80% are physically mixed at room temperature to obtain a two-stage cascade refrigeration low-temperature grade mixed refrigerant.
Embodiment 2
[0026] Example 2: ethylene with a molar concentration of 95% and perfluoroethane with a molar concentration of 5% are physically mixed at room temperature to obtain a low-temperature grade mixed refrigerant for two-stage cascade refrigeration.
Embodiment 3
[0027] Example 3: ethylene with a molar concentration of 20% and trifluoromethane with a molar concentration of 80% were physically mixed at room temperature to obtain a low-temperature grade mixed refrigerant for two-stage cascade refrigeration.
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The invention provides a two-stage overlapped refrigeration low-temperature grade mixed refrigerant, comprising a component 1 and a component 2 which are physically mixed together, wherein the component 1 is ethylene; and the component 2 is one or two of fluoroform and perfluoroethane, the component 1 accounts for 20-95wt%, and the component 2 accounts for 5-80wt%. Because the components comprise a natural work medium (ethylene), the global warming potential (GWP) of the refrigerant is low, and the intersolubility of the refrigerant in lubricating oil at a low temperature is greatly enhanced to ensure that the system reliability is greatly improved, and soluble oil substances such as propane do not need to be additionally added.
Description
【Technical field】 [0001] The invention relates to a mixed refrigerant, in particular to a two-stage cascade refrigeration low-temperature mixed refrigerant. 【Background technique】 [0002] With the improvement of people's living standards, there is more and more demand for refrigeration technology in the temperature range of around -80 °C. This temperature zone refrigeration can be used for active storage of biological materials, low-temperature preservation of deep-sea fish, low-temperature treatment of alloy materials, etc. The two-stage cascade refrigeration cycle is one of the main ways to achieve refrigeration in the -80°C temperature zone. The basic principle of cascade refrigeration is to use the evaporator of a high-temperature refrigeration system to cool the condenser of a low-temperature refrigeration system to achieve a lower refrigeration temperature, and each stage is a complete vapor compression cycle. The evaporation temperature of the first-stage system is...
Claims
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IPC IPC(8): C09K5/04
CPCC09K5/045C09K2205/12C09K2205/122C09K2205/34
Inventor 吴剑峰董学强公茂琼沈俊
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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