Fluorine-free refrigerant and its preparation method

Abstract

The invention discloses a fluorine-free refrigerant and a preparation method thereof. The fluorine-free refrigerant is prepared by evenly mixing the following raw materials in parts by mass: 30-60 parts of propane, 40-60 parts of propylene, 20-30 parts of isobutane, 10-15 parts of 1,1,1,2-tetrafluoroethane, 10-18 parts of 1,1,2,2-tetrafluoroethane, 2-8 parts of trifluoroiodomethane, 3-12 parts of pentafluoroethyl iodide, 5-15 parts of tetramethyl cyclobutane, 20-30 parts of liquid carbon dioxide and 4-7 parts of cryogenic lubricating oil at room temperature of 20-25 DEG C, wherein the pour point of the cryogenic lubricating oil is -30 to -35 DEG C. According to the technical scheme disclosed by the invention, the ODP value is zero, if the fluorine-free refrigerant is applied in a long term, the fluorine-free refrigerant cannot cause damage to the ozone layer, since the GWP values of the adopted raw materials are all very low and the working pressure is comparable to R22, the change on the existing refrigeration system is not needed and thus the production cost is reduced, the premise that the refrigeration effect of the refrigerant is not reduced can be ensured and meanwhile the refrigerant has effects of suppressing combustion and suppressing explosion.

Description

technical field [0001] The invention relates to the field of refrigerants, in particular to a fluorine-free refrigerant and a preparation method thereof. Background technique [0002] Global warming potential (GWP), which is an important parameter of refrigerants, is defined as the climate warming potential of greenhouse gases relative to carbon dioxide. The official global warming potential (GWP) is calculated this way: the warming capacity of a kilogram of gas relative to a kilogram of carbon dioxide over a hundred years. The official GWP chart is published in the Second Assessment Report adopted by the Intergovernmental Panel on Climate Change (1995 IPCC GWP values). More accurate GWP values ​​published in the latest IPCC assessment report, more environmentally friendly fluids, in some cases involving suitable replacement for existing refrigerants with higher global warming potential (such as R410A, R134a, R407C and R404A)), which constitute the working fluid in refrige...

AI Technical Summary

Problems solved by technology

Tetrafluoroethane (R134a) can be used in many fields using R22, but because the use of this product sometimes requires a change in equipment design, so not only the cost of the product itself is high, but also the cost of the entire refrigeration equipment increases, which is a great waste resources, the future development trend will also be eliminated

However, the refrigerant has always had the problem of high cost in practical application, so its popularization and application has been limited.

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