Environment-friendly type azeotropic coolant adaptated for single-stage compression refrigeration system
A refrigeration system, single-stage compression technology, applied in heat exchange materials, chemical instruments and methods, etc., can solve problems such as the inability to guarantee the azeotropic properties of R134a+R600a mixtures, the actual concentration deviation, and the large difference in solubility, and achieve good results. The effect of mutual solubility, increased evaporation pressure, and increased cooling capacity
Inactive Publication Date: 2008-04-16
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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Problems solved by technology
In addition, based on the applicant's research on the solubility properties of R134a+R600a lubricating oil, since the solubility of the two simple substances of R134a and R600a in mineral oil is very different, a certain concentration of R134a+R600a mixture in the lubricating oil Operation in a refrigeration system will inevitably lead to a large deviation in the actual concentration
Therefore, the concentration range given in 200310118961.4 cannot guarantee that the R134a+R600a mixture will still maintain azeotropic characteristics during actual operation
Method used
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Embodiment 1
[0021] Example 1: 1,1,1,2-tetrafluoroethane with a molar concentration of 63% and isobutane with a molar concentration of 37% are physically mixed at room temperature to obtain a single-stage compression refrigeration system. mixed refrigerant.
Embodiment 2
[0022] Example 2: 1,1,1,2-tetrafluoroethane with a molar concentration of 61% and isobutane with a molar concentration of 39% are physically mixed at room temperature to obtain a single-stage compression refrigeration system mixed refrigerant.
Embodiment 3
[0023] Example 3: 1,1,1,2-tetrafluoroethane with a molar concentration of 60% and isobutane with a molar concentration of 40% are physically mixed at room temperature to obtain a single-stage compression refrigeration system mixed refrigerant.
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The invention relates to an azeotropic refrigerant for single stage compressive refrigerating system, which comprises 1, 1, 1, 2-tetrafluorine ethane and isobutene physically mixed together, wherein the mol concentration of the 1,1,1,2-tetrafluorine ethane is 50-63 percent, and the rest is the isobutene. The azeotropic refrigerant has higher efficiency, high evaporating pressure, and higher refrigerating ability with the same compressor discharge capacity; the ODP of the invention is zero and the GWP of the invention is greatly reduced compared with the R12 and R134a; the invention has good mutual solubility with lubricating oil and gives priority to the problem of concentration change of the mixture in the lubricating oil, thereby ensuring that the azeotropy of the mixture is maintained during actual operation; the invention can be used in the deep freezing preserving technology and is easy to obtain a lower effective refrigerant temperature.
Description
technical field [0001] The invention relates to a mixed refrigerant, in particular to an environment-friendly azeotropic mixed refrigerant containing alkanes and suitable for single-stage compression refrigeration systems. Background technique [0002] The single-stage compression refrigeration system is widely used in refrigerators, air conditioners and automobile air conditioners as an efficient and reliable refrigeration method in the general cold temperature zone. With the improvement of people's living standards, higher requirements are put forward for such refrigeration systems in terms of environmental protection and energy saving. In addition, in the design of the latest household refrigerator system, the fresh-keeping technology in the cryogenic temperature zone has become a hot spot of development, which requires this type of single-stage compression refrigeration system to still have high efficiency at -30°C or even -40°C. [0003] The working fluids commonly use...
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Inventor 吴剑峰张宇公茂琼
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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