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Low GWP heat transfer compositions containing difluoromethane, a fluorinated ethane and 1,3,3,3-tetrafluoropropene

A technology of tetrafluoropropene and difluoromethane, applied in the field of heat transfer system, can solve the problems of undesired danger and the like

Inactive Publication Date: 2015-12-23
HONEYWELL INT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Applicants have found that, as discussed more fully hereinafter, certain compositions exhibit undesirably high levels of hazard even when such compositions contain components indicating that the use of the material is acceptable from a burning rate standpoint. time-sharing

Method used

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  • Low GWP heat transfer compositions containing difluoromethane, a fluorinated ethane and 1,3,3,3-tetrafluoropropene
  • Low GWP heat transfer compositions containing difluoromethane, a fluorinated ethane and 1,3,3,3-tetrafluoropropene
  • Low GWP heat transfer compositions containing difluoromethane, a fluorinated ethane and 1,3,3,3-tetrafluoropropene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Example 1: Automotive AC conditions

[0053] This example illustrates the performance of embodiments A1-A3 and B1-B3 of the present invention when used as a substitute for HFC-134a in an automotive AC refrigerant system. The system has an evaporator temperature (ET) of about 4°C, a degree of superheat at the evaporator outlet of about 5°C, a condenser temperature (CT) of about 60°C, and a subcooling of about 5°C. The system has a degree of superheat at the suction line of about 10°C and an efficiency of about 70%.

[0054] The coefficient of performance (COP) is a generally accepted measure of the performance of a refrigerant, and is especially useful for representing the relative thermodynamic efficiency of the refrigerant in a specific heating or cooling cycle involving the evaporation or condensation of the refrigerant. In refrigeration engineering, the term expresses the ratio of useful refrigeration to the energy applied by the compressor when compressing vapor. The c...

Embodiment 2

[0060] Example 2: Automotive AC conditions

[0061] This example exemplifies a composition within the scope of certain aspects of the present invention, namely compositions B4-B6 that do not contain HFC-152a but contain HFC-134a, which uses the automotive AC system operating as in Example 1. The results are reported in the table below:

[0062]

[0063] As can be seen from the results reported above, the composition containing no HFC-152a but containing HFC-134a according to the teachings contained herein exhibits an excellent but unexpected combination of properties, including low GWP, low burning rate and hazard Value and excellent capacity and COP. The slip of such compositions may be higher than required for some applications, but is acceptable for many applications.

Embodiment 3

[0068] Example 3: Medium temperature conditions

[0069] This example illustrates the performance of the embodiments A1-A3 and B1-B3 of the present invention when used as a substitute for HFC-134a in a medium temperature refrigerant system. This system has an evaporator temperature (ET) of about -10°C, a superheating degree at the evaporator outlet of about 5°C, a condenser temperature (CT) of about 5°C, and a subcooling system of about 5°C. The system has a degree of superheat at the suction line of about 45°C and an efficiency of about 70%.

[0070] The observed properties of the composition and its performance in an exemplary medium temperature system are as follows:

[0071]

[0072] The Ev total slip and the hazard value were each measured as described in Example 1 above.

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PUM

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Abstract

Heat transfer compositions, methods and use wherein the composition comprises (a) from about 5% to about 20% by weight of HFC-32; (b) from about 70% to about 90% by weight of HFO-1234ze; and (c) from about 5% to less than about 20% by weight of HFC-152a and / or HFC-134a.

Description

[0001] Cross references to related applications [0002] This application claims the right of priority to the U.S. Provisional Application Serial No. 61 / 801,770 filed on March 15, 2013 according to 35 U.S.C.119(e). This application is based on 35 U.S.C. 120 or part of the continuation of the U.S. Application Serial No. 13 / 530,585 filed on June 22, 2012, which claims the priority of U.S. Provisional Patent Application No. 61 / 507,186 filed on July 13, 2011. The entire contents of all the aforementioned applications are incorporated herein by reference. Invention field [0003] The present invention relates to compositions, methods and systems for use in many applications, including especially heat transfer systems, such as refrigeration systems. In a preferred aspect, the present invention relates to particularly suitable for use in applications where the refrigerant 1,1,1,2-tetrafluoroethane (HFC-134a) was previously used, especially including applications for heating and / or coolin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/04
CPCB01D11/0288B01D11/0492C08J9/146C08J2203/142C08J2203/162C08J2203/202C08J2325/06C08J2363/00C08J2375/04C09K3/30C09K5/045C09K2205/126C09K2205/22C09K2205/40C11D3/43
Inventor S.F.亚纳莫塔M.W.斯帕茨C.J.西顿
Owner HONEYWELL INT INC