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Heat transfer compositions

A heat transfer composition and technology of the composition are applied in the directions of detergent composition solvent, household heating, heating method, etc., can solve the problems of reducing flammability, consumption of raw materials, complicated preparation, etc., and achieve the effect of zero ozone depletion potential

Inactive Publication Date: 2011-09-21
MEXICHEM AMANCO HLDG DE C V
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As a result, using R-1234yf and achieving the same energy efficiency and cooling performance as R-134a requires increased equipment complexity and increased pipe size, which results in increased equipment-related indirect emissions
Furthermore, the preparation of R-1234yf is believed to be more complex and less efficient in its raw material usage (fluorination and chlorination) than R-134a
Therefore, replacing R-134a with R-1234yf consumes more raw materials and results in more indirect emissions of greenhouse gases than R-134a
[0017] Some existing technologies designed for R-134a may not even accept the reduced flammability of certain heat transfer compositions (any composition with a GWP less than 150 is considered somewhat flammable)

Method used

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Experimental program
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Embodiment

[0129] Flammability

[0130] The flammability of certain compositions of the present invention in air at atmospheric pressure and controlled humidity was studied in a test flask apparatus as described in the method of ASHRAE Standard 34. The test temperature used was 23°C; humidity was controlled at 50% relative to a standard temperature of 77°F (25°C). The diluent used was R-1234ze(E) which was found to be non-flammable under these test conditions. The fuel used was a blend of R-32 and R-152a. Three fuel compositions were tested, varying the molar ratio of R32 to R-152a in each fuel. The three molar ratios of R32 to R-152a used were 1:1; 1:2 and 1:3. Prior to testing, the fuel and diluent gases are vacuum purged to remove dissolved air or other inert gases. The results of these tests are shown in Figures 1 to 3 middle. In these triangular diagrams, vertices represent pure fuel, air, and diluent. The flammable area is determined by varying the relative proportions of f...

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Abstract

The invention provides a heat transfer composition comprising trans-1, 3,3,3- tetrafluoropropene (R-1234ze(E)), difluoromethane (R-32) and 1,1-difluoroethane (R- 152a).

Description

technical field [0001] The present invention relates to a heat transfer composition, in particular to a composition suitable for use as existing refrigerants such as R-134a, R-152a, R-1234yf, R-22, R-410A, R-407A, R-407B, R-407C , R507 and R-404a replacement heat transfer composition. Background technique [0002] The listing or discussion of a previously published document or any background knowledge in this specification should not be considered as an acknowledgment that the document or background knowledge is part of the prior art or is common general knowledge. [0003] Mechanical refrigeration systems and associated heat transfer equipment such as heat pumps and air conditioning systems are well known. In such systems, refrigerant liquid evaporates at low pressure, removing heat from the surrounding area. The resulting vapor is then compressed and passed into a condenser where it condenses and releases heat to a second zone, the condensate is returned to the evaporato...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/04A23L27/10C09K23/00
CPCG06Q30/018F28C3/06C08J9/146F01K25/08C09K3/00C09K5/045C11D3/43F25B45/00C09K2205/22C11B9/025C09K3/30C09K2205/126A23L1/2215A23L27/11Y02A40/963C08J9/12C08J9/14C09K5/04F24F13/00F25D31/00F28C3/08C09K23/00
Inventor 罗贝特·E·洛
Owner MEXICHEM AMANCO HLDG DE C V