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Mixed working medium and application thereof

A technology of mixed working medium and thermal working medium, which is applied in the direction of refrigerators, heat pumps, lighting and heating equipment, etc. It can solve problems such as accidents, system performance reduction, and exhaust temperature exceeding, so as to reduce operation and use costs and volume control The effect of large heat and small temperature glide

Inactive Publication Date: 2010-02-24
HONEYWELL (CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the temperature is further increased, it will not only reduce the system performance, but also cause accidents because the exhaust pressure and exhaust temperature of the working medium exceed the safety limit of the existing heat pump system

Method used

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  • Mixed working medium and application thereof
  • Mixed working medium and application thereof
  • Mixed working medium and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0045] The preparation method of the mixed working fluid of the present invention is to physically mix each component substance (and optionally the lubricating oil, additives or additional components, etc.) according to a specified mass ratio at normal temperature.

[0046] The mixed working medium of the present invention can be applied to any conventional medium-high temperature heat pump system, but does not include a fractional condensation heat pump system, and there is no special limitation other than that.

[0047] The medium-high temperature heat pump system is a vapor compression cycle system, which is composed of a compressor, a condenser, a throttling element, an evaporator, etc., and may also include a subcooler, an oil separator, and a vapor-liquid separator. The working principle of the medium and high temperature heat pump system will be described below.

[0048]First, the low-pressure liquid mixed working medium (such as the mixed working medium of the present ...

Embodiment 1-10

[0081] 1,1,1,2,3,3,3-heptafluoropropane (R227ea), 1,1,1,3,3,3-hexafluoropropane (R236fa) and 1,1-difluoroethane (R152a) According to the composition ratio in Table 2, physical mixing is carried out in the liquid phase to obtain the mixed working fluids of Examples 1-10 of the present invention, and the working conditions are as follows: condensation dew point temperature 80°C, superheat degree 10°C, supercooling Its performance was tested under the condition of temperature of 2°C and evaporating dew point temperature of 30°C, the results are shown in Table 2.

Embodiment 11-28

[0085] 1,1,1,2,3,3,3-heptafluoropropane (R227ea), 1,1,1,3,3,3-hexafluoropropane (R236fa) and 1,1-difluoroethane (R152a) According to the composition ratio in Table 3, physical mixing is carried out in the liquid phase to obtain the mixed working fluids of Examples 11-28 of the present invention, and the working conditions are respectively: condensation dew point temperature 90°C, superheat degree 10°C, supercooling Its performance was tested under the condition of temperature of 2°C and evaporating dew point temperature of 30°C. The results are shown in Table 3.

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PUM

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Abstract

The invention relates to a mixed working medium, which consists of 1,1,1,2,3,3,3-hepta fluoropropane, 1,1,1,3,3,3-hexafluoropropane and 1,1-di fluoroethane. The mixed working medium is particularly suitable to be used for a medium and high temperature heat pump system of which the condensing dew point temperature is between 70 and 100DEG C, can be directly used in the prior heat pump systems, anddoes not have safety problems such as overhigh exhaust pressure and exhaust temperature and the like. The invention also relates to a refrigerating / heating method and a heat pump system using the mixed working medium.

Description

technical field [0001] The invention relates to a mixed working fluid and its application in a refrigeration / heating method or a heat pump system. Background technique [0002] Heat pump technology is to improve the grade of low-grade thermal energy that cannot be directly utilized (heat energy contained in air, soil, surface water and shallow groundwater, as well as industrial waste heat, geothermal energy, solar energy, etc.) that cannot be directly utilized to a level that can be directly utilized , while consuming a portion of high-grade energy (such as electrical energy). The use of heat pump technology is more efficient than traditional heating methods, thereby reducing greenhouse gas emissions and reducing heat pollution caused by waste heat emissions. In order to meet the industrial requirements for higher heating temperature, the current heat pump technology is developing in the direction of medium and high temperature (condensing dew point temperature is 70-100 ℃)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/04F25B30/06
Inventor 孙蔼军张科
Owner HONEYWELL (CHINA) CO LTD