Mixed working substance containing N*O in auto-cascade circulatory system

A technology of circulation system and mixed working fluid, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of increasing exhaust gas temperature, increasing system pressure ratio, and low reliability.

Inactive Publication Date: 2009-06-03
HENAN XINFEI ELECTRICAL EQUIP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The minimum refrigeration temperature achieved by a single-stage vapor compression refrigeration cycle is generally 230K. When the condensing pressure is constant, if you want to achieve a lower evaporation temperature, the system pressure ratio will increase, the gas transmission coefficient will decrease, and the cooling capacity will decrease. The efficiency of the actual compressor decreases, the power consumption increases, the exhaust temperature increases, and the oper

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  • Mixed working substance containing N*O in auto-cascade circulatory system
  • Mixed working substance containing N*O in auto-cascade circulatory system

Examples

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Embodiment Construction

[0013] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0014] Embodiment 1-Example 4: Suitable for 200K temperature zone self-cascading circulation system containing N 2 The mixed working fluid of O(R744A), the ambient temperature is 300K, and the refrigeration cycle is figure 1 As shown, the working substance concentration and properties are shown in the following table 1:

[0015] Table 1

[0016] project Example 1 Example 2 Example 3 Example 4 Group 1

substance

45%

(N 2 O 35%,

Ethane 10%)

40%N 2 o

50%

(N 2 O 15%, three

Fluoromethane 35%) 40%

(N 2 O 30%, B

ene 10%)

Group 2

substance

55% butane

60%

(butane 50%,

1,1,1,3,3,3 Hexafluoro

Propane 10%)

50%

(butane 35%,

trans-2-butene

5%, 1-butene

5%, perfluorobutane

...

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Abstract

The invention discloses a mixed working substance containing N2O in an auto-cascade circulatory system. The working substance consists of 15-50% of a first group substance by mass fraction and a second group substance in balancing amount, wherein, the first group substance is N2O or a compound formed by N2O and one or more of ethane, trifluoromethane, hexafluoroethane, fluoromethane, carbon dioxide and ethylene. Compared with the prior working substance used for the auto-cascade circulatory system, the mixed working substance provided by the invention has the following advantages: the mixed working substance provided by the invention can effectively realize the refrigeration of a temperature range of 200-240K; the ozone depletion potential (ODP) of N2O (R744A) equals to zero, and the global warming potential (GWP) thereof is relatively low; and as N2O is a natural substance which can be easily obtained, and other refrigerants matched with N2O are reasonably priced, the use of the mixed refrigerant can reduce the cost for companies.

Description

technical field [0001] The invention relates to a multi-element mixed working medium refrigerant, in particular to a self-cascading circulation system suitable for 200-240K temperature zone containing N 2 O mixed working fluid. Background technique [0002] The minimum refrigeration temperature achieved by a single-stage vapor compression refrigeration cycle is generally 230K. When the condensing pressure is constant, if you want to achieve a lower evaporation temperature, the system pressure ratio will increase, the gas transmission coefficient will decrease, and the cooling capacity will decrease. The efficiency of the actual compressor decreases, the power consumption increases, the exhaust temperature increases, and the operating conditions deteriorate. In order to achieve a lower temperature, a multi-stage compression refrigeration cycle system and an outer cascade refrigeration cycle system can be used, but the multi-stage compression system and the outer cascade cycl...

Claims

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Application Information

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IPC IPC(8): C09K5/04
Inventor 晏刚冯永斌王生软肖建军钱文波刘玲玲
Owner HENAN XINFEI ELECTRICAL EQUIP
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