Non-flammable mixed refrigerant applicable to temperature zone from -60 to -100 DEG C
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A mixed refrigerant and temperature zone technology, applied in the direction of heat exchange materials, chemical instruments and methods, can solve the problems of low flammability and high greenhouse effect
Inactive Publication Date: 2017-11-21
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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[0007] In view of this, it is necessary to address the defects in the prior art and provide a non-flammable mixed refrigerant suitable for the temperature range of -60 to -100°C, aiming to solve the problem of cryogenic mixed refrigerants provided by the prior art. Technical issues with low flammability and high greenhouse effect
Method used
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Embodiment 1-3
[0029] Prepare the non-flammable multi-component mixed refrigerant of the present invention that operates in the temperature range of -70°C. The minimum heat transfer temperature difference inside the heat exchanger is 1K, and the ambient temperature is 27°C. The working medium concentration and performance of the non-flammable multi-component mixed refrigerant are shown in the table below :
[0030]
Embodiment 4-6
[0032] Prepare a non-flammable multi-component mixed refrigerant that operates in the temperature range of -86°C. The minimum heat transfer temperature difference inside the heat exchanger is 1K, and the ambient temperature is 27°C. The concentration and performance of the non-flammable multi-component mixed refrigerant are shown in the following table:
[0033]
[0034]
Embodiment 7-9
[0036] Prepare a non-flammable multi-component mixed refrigerant that operates in the temperature range of -100°C. The minimum heat transfer temperature difference inside the heat exchanger is 1K, and the ambient temperature is 27°C. The concentration and performance of the non-flammable multi-component mixed refrigerant are shown in the following table:
[0037]
[0038]
[0039]In the above embodiments, the regenerative refrigeration system with non-flammable mixed refrigerants can safely and efficiently realize cooling in the temperature range of -60 to -100°C. Compared with the existing cryogenic mixed refrigerants, it has no Flammability, and the overall low greenhouse effect, no ozone depletion effect, has significant advantages.
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Abstract
The invention provides a non-flammable mixed refrigerant applicable to a temperature zone from -60 to -100 DEG C. The non-flammable mixed refrigerant comprises at least one selected from a group consisting of cis-1,1,1,4,4,4-hexafluorobutene, trans-1,1,1,4,4,4-hexafluorobutene, 1-chloro-3,3,3-trifluoropropene, cis-1,3,3,3-tetrafluoropropene, 1,1,1,2,2,3,4,5,5,5-decafluoropentane, perfluorobutane and perfluoropentane, at least one selected from a group consisting of perfluoropropane, pentafluoroethane, 1,1,2,2-tetrafluoroethane, 1,1,1,2-tetrafluoroethane, difluoromethane, 1,1,1-trifluoroethane, trifluoroiodomethane, 1,1,1,2,3,3,3-heptafluoropropane, 1,1,1,2,3,3-hexafluoropropane and 1,1,1,3,3-pentafluoropropane, at least one selected from a group consisting of trifluoromethane and perfluoroethane, and perfluoromethane. The non-flammable mixed refrigerant provided by the invention can safely and efficiently realize cooling in a temperature range of -60 to -100 DEG C, does not have flammability at all, and is low in overall greenhouse effect and free of ozone depletion effect.
Description
technical field [0001] The invention belongs to the technical field of refrigerants, and in particular relates to a nonflammable mixed refrigerant suitable for a temperature range of -60 to -100 DEG C. Background technique [0002] At present, multivariate mixed working fluid throttling refrigerators using heat recovery measures have been widely used in the fields of energy, chemical industry, and low-temperature engineering to realize deep cooling of devices and liquefaction of industrial gases, such as low-temperature refrigerators and natural gas liquefaction. In addition to the refrigeration system process and hardware facilities such as compressors and heat exchangers, the most critical part of this refrigeration technology is the multi-component mixed refrigerant. [0003] Due to the limitations of the basic physical parameters such as the boiling point and freezing point temperature of the components, and other physical and chemical properties such as the flammability...
Claims
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