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Compositions comprising 1,1-difluoroethylene

A technology of vinylidene fluoride and vinylidene fluoride, which is applied in the field of ultra-low temperature heat transfer compositions, and can solve problems such as the reduction of refrigeration capacity

Pending Publication Date: 2022-01-07
MEXICHEM FLUOR S A DE CV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The thermodynamic energy efficiency of pure R-1132a is close to R-508 and better than R-23, but its refrigeration capacity is reduced compared with R-508 and R-23

Method used

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  • Compositions comprising 1,1-difluoroethylene
  • Compositions comprising 1,1-difluoroethylene
  • Compositions comprising 1,1-difluoroethylene

Examples

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example

[0106] Compositions of R-1132a, R-744, R-125 and R-23

[0107] The performance of the quaternary compositions of the invention was modeled and the results are provided in the table below. These tables list GWP, condenser slip and evaporator slip, capacity and COP relative to R-23, discharge temperature differential, and condenser differential pressure. Tables provide contents in weight percent unless otherwise stated.

[0108] The cycle conditions used in the modeling are shown in Table 1.

[0109] Table 1

[0110]

[0111]

[0112] Thermodynamic models for mixture calculations use cubic-type equations to model the gas phase and Gibbs free energy correlations (Wilson equations) to model the liquid-phase and temperature dependencies of component vapor pressures sex modeling. Where available, binary interaction parameters of the fluids were correlated with measured phase equilibrium data.

[0113] A number of compositions have been identified that have significantly h...

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Abstract

A composition comprising a 1,1-difluoroethylene, comprises: (i) 1,1-difluoroethylene (vinylidene fluoride, R-1132a); (ii) carbon dioxide (CO2, R-744); (iii) pentafluoroethane (R-125); and (iv) one or more of trifluoromethane (R-23) and hexafluoroethane (R-116).

Description

[0001] This application is a divisional application of a Chinese patent application named "composition" with application number 201880031952.6, which is an international application (PCT / GB2018 / 051344) filed on May 17, 2018 under the Patent Cooperation Treaty. The national application in the Chinese national phase, the priority date of the application is May 17, 2017. technical field [0002] The present invention relates to compositions, preferably heat transfer compositions, and in particular to ultra-low temperature heat transfer compositions which can be adapted to replace existing refrigerants such as R-23, R-13B1, R -508A or R-508B. Background technique [0003] The listing or discussion of a prior-published document or any background in this specification should not necessarily be taken as an acknowledgment that the document or background is part of the state of the art or is common general knowledge. [0004] Mechanical refrigeration systems and associated heat tran...

Claims

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Application Information

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IPC IPC(8): C09K5/04C11D7/50A62D1/00B01D11/02B01D11/04G06Q50/26
CPCA62D1/0057B01D11/0288B01D11/0492C09K5/041C09K5/045C11D7/5018C11D7/5077G06Q50/26C09K2205/106C09K2205/122C09K2205/126C09K2205/32C09K2205/44C09K2205/40C11D7/505C09K2205/12C09K2205/22C11D7/509
Inventor 罗伯特·洛
Owner MEXICHEM FLUOR S A DE CV
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