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Mixed refrigerant suitable for 120-150K cryogenic temperature region

A technology for mixing refrigerants and refrigerants, which can be used in heat exchange materials, chemical instruments and methods, etc., and can solve problems such as danger

Active Publication Date: 2012-08-01
北京天地精仪科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This mixed refrigerant is applied to a general small-scale refrigeration system, and the flammable refrigerant often exceeds several kilograms. If it is applied to a larger system, the entire system will be a dangerous powder keg. Once it leaks, the consequences will be disastrous.

Method used

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  • Mixed refrigerant suitable for 120-150K cryogenic temperature region

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Embodiment 1: Configure the mixed refrigerant used in the 120K temperature zone, and the molar concentration of each type of refrigerant is as follows:

[0058] The first category: R728 accounts for 10% of the total molar concentration, and R740 accounts for 10% of the total molar concentration;

[0059] The second type: R50 accounts for 10% of the total molar concentration; R784 accounts for 5% of the total molar concentration;

[0060] The third category: R14 accounts for 20% of the total molar concentration;

[0061] The fourth category: R23 accounts for 20% of the total molar concentration;

[0062] The fifth category: R22 accounts for 5% of the total molar concentration, and the rest is 0%;

[0063] The sixth category: R123 accounts for 20% of the total molar concentration, and the rest is 0%.

[0064] The operating parameters are: condensing temperature 300K, refrigeration temperature 120K, compressor discharge temperature 380K, high pressure 220psi, low pressu...

Embodiment 2

[0065] Embodiment 2: Configure the mixed refrigerant used in the 120K temperature zone, and the molar concentration of each type of refrigerant is as follows:

[0066] The first category: R728 accounts for 5% of the total molar concentration, and R740 accounts for 15% of the total molar concentration;

[0067] The second type: R50 accounts for 5% of the total molar concentration; R784 accounts for 10% of the total molar concentration;

[0068] The third category: R14 accounts for 15% of the total molar concentration;

[0069] The fourth category: R23 accounts for 20% of the total molar concentration;

[0070] The fifth category: R32 accounts for 5% of the total molar concentration, R22 accounts for 5% of the total molar concentration, and the rest is 0%;

[0071] The sixth category: R123 accounts for 20% of the total molar concentration, and the rest is 0%.

[0072] The operating parameters are: condensing temperature 300K, cooling temperature 120K, compressor discharge tem...

Embodiment 3

[0073] Embodiment 3: Configure the mixed refrigerant used in the 130K temperature zone, and the molar concentration of each type of refrigerant is as follows:

[0074] The first category: R740 accounts for 15% of the total molar concentration, and the rest is 0%;

[0075] The second category: R784 accounts for 20% of the total molar concentration, and the rest is 0%;

[0076] The third category: R14 accounts for 20% of the total molar concentration;

[0077] The fourth category: R23 accounts for 15% of the total molar concentration;

[0078] The fifth category: R125 accounts for 3% of the total molar concentration, R218 accounts for 7% of the total molar concentration, and the rest is 0%;

[0079] The sixth category: R123 accounts for 10% of the total molar concentration, R124 accounts for 10% of the total molar concentration, and the rest is 0%;

[0080] The operating parameters are: condensing temperature 300K, cooling temperature 130K, compressor discharge temperature 37...

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Abstract

The invention relates to a mixed refrigerant suitable for a 120-150K cryogenic temperature region of a single automatic cascading refrigeration system. The mixed refrigerant comprises the following six type refrigerants, by molar concentration, 3-20% of a first type refrigerant which is R740, R728 or a mixture of the R740 and the R728, 5-25% of a second type refrigerant which is R50, R784 or a mixture of the R50 and the R784, 15-30% of a third type refrigerant which is R14, 15-25% of a fourth type refrigerant which is R23, 5-15% of a fifth type refrigerant which is R125, R218, R22, R32 or a mixture of two, three or four of the R125, the R218, the R22 and the R32, and 20-30% of a sixth type refrigerant which is R236fa, R123, R124 or a mixture of two or three of the R236fa, the R123 and the R124. The corresponding mixed refrigerant is obtained through physical mixing at normal temperature, so the temperature of the system can reach 120-150K; and the mixed refrigerant has a good intersolubility with lubricating oil, so the ODP value is almost zero. The mixed refrigerant has the advantages of economy, environmental protection, safety, incombustibility and the like.

Description

field of invention [0001] The invention belongs to the field of refrigeration systems, and relates to a refrigerant, in particular to a mixed refrigerant suitable for the 120K-150K cryogenic temperature zone of a single-unit automatic cascade refrigeration system. Background technique [0002] In modern refrigeration technology, if you use a compressor to cool to a cryogenic temperature zone of 120K ~ 150K, you usually need to use a three-element or four-element cascade refrigeration method. However, the multi-cascade system is complex, requires more compressors, auxiliary components and control components, has a higher failure rate, and is relatively backward in technology. Therefore, the low temperature technology of 120K ~ 150K will be greatly developed through the stand-alone automatic cascade refrigeration system. [0003] In the prior art, such as the US patent: US5,441,658 and the Chinese patent: CN97,115,295.0 are all applied to the liquid nitrogen temperature zone ...

Claims

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Application Information

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IPC IPC(8): C09K5/04
Inventor 龙志刚
Owner 北京天地精仪科技有限公司
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