Incombustible mixed refrigerant suitable for copious cooling temperature of 90-140DEG C below zero

A mixed refrigerant and cryogenic technology, applied in heat exchange materials, chemical instruments and methods, etc., can solve the problems of increasing system complexity, impact of environmental protection characteristics, and poor low temperature oil solubility of mixed refrigerants.

Active Publication Date: 2012-09-12
中科赛凌(北京)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] According to the above analysis, it can be known that in the prior art, cryogenic multi-component non-flammable mixed refrigerants composed of N2, Ar, R14, R23 and other high boiling point substances have been realized, but the high boiling point components in such mixed refrigerants Either substances containing ozone depletion potential (ODP) such as R142b are used, or hydrofluorocarbon substances with high greenhouse effect (GWP) such as R236fa are used, which affect their environmental protection characteristics
In addition, most HFC and FC substances have poor miscibility with lubric

Method used

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  • Incombustible mixed refrigerant suitable for copious cooling temperature of 90-140DEG C below zero
  • Incombustible mixed refrigerant suitable for copious cooling temperature of 90-140DEG C below zero
  • Incombustible mixed refrigerant suitable for copious cooling temperature of 90-140DEG C below zero

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0031] Prepare the completely non-flammable or only weakly flammable multi-component mixed refrigerant that operates in the -90°C temperature range of the present invention. The minimum heat transfer temperature difference inside the heat exchanger is 1K, and the ambient temperature is 35 °C. The working medium concentration and performance of the multi-component mixed refrigerant See the table below:

[0032]

Embodiment 2

[0033] Example 2: Preparation of completely non-flammable or only weakly flammable multi-component mixed refrigerants operating in the temperature range of -110°C, the minimum heat transfer temperature difference inside the heat exchanger is 1K, the ambient temperature is 35 °C, and the working medium concentration of the multi-component mixed refrigerants is And the performance is shown in the table below:

[0034]

[0035]

Embodiment 3

[0036] Example 3: Preparation of a completely non-flammable or only weakly flammable multi-component mixed refrigerant operating in the temperature range of -140°C. The minimum heat transfer temperature difference inside the heat exchanger is 1K, and the ambient temperature is 35°C. The working medium concentration of the multi-component mixed refrigerant is And the performance is shown in the table below:

[0037]

[0038]

[0039] In the above-mentioned embodiments, the regenerative refrigeration system with completely non-flammable or only weakly flammable mixed refrigerants can safely and efficiently realize cooling in the temperature range of -90 to -140°C, compared with the existing cryogenic mixed refrigerants , which is completely non-flammable or only weakly flammable, and has a low overall greenhouse effect and no ozone-depleting effect at all, which has significant advantages.

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Abstract

The invention relates to an incombustible mixed refrigerant suitable for the copious cooling temperature of 90-140DEG C below zero, which comprises the following five groups of substances: the first group is nitrogen, argon, methane or mixture; the second group is R14; the third group is R23, R116, R170, R1150, R41 or mixture; the fourth group is R218, R125, R32, R143a, R290, R1270, R13I1, R134, R134a, R152a, R1216 or mixture; the fifth group is R1234ze, R245cb, R227ea, R3110, R236fa, R254cb, R143, R236ea, R245fa, R329mcc, R347mcc, R338mcf, R245eb, R245ca, R338mee, R338mcc or mixture; the molar concentrations of the five groups are respectively 5-35%, 10-40%, 5-20%, 5-20% and 5-25%. The incombustible mixed refrigerant suitable for the copious cooling temperature of 90-140DEG C below zero has the advantages of low integral greenhouse effect, no ozone damage and the like, is safe in a regeneration type throttling and refrigerating system, and refrigeration in the temperature zone of 90-140DEG C below zero can be realized.

Description

technical field [0001] The invention relates to refrigerants in the technical field of refrigeration and low temperature, in particular to a non-flammable mixed refrigerant suitable for cryogenic temperatures of -90 to -140°C. The multi-element mixed refrigerant is efficient, safe and environmentally friendly. Background technique [0002] The cryogenic multi-component mixed working medium throttling refrigerator with heat recovery measures has the advantages of high efficiency, reliability and low manufacturing cost. It is widely used in the fields of energy, chemical industry and low temperature engineering, and is used to realize deep cooling of devices and liquefaction of industrial gases. , such as cryogenic refrigerators, natural gas liquefaction and other fields. 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 refrigeran...

Claims

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Application Information

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IPC IPC(8): C09K5/04
Inventor 吴剑峰公茂琼董学强沈俊
Owner 中科赛凌(北京)科技有限公司
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