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Zero zone destruction and mixed working medium suitable for compression type heat pump

A compression heat pump and mixed working medium technology, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of atmospheric ozone layer destruction, low water outlet temperature, and high outlet temperature, and achieve good thermal parameters and greenhouse effect effects Small size, good thermal performance

Inactive Publication Date: 2007-07-18
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the existing heat pump working fluid, or the outlet water temperature is too low (Freon-22 and 1,1,1,2-tetrafluoroethane), or has a destructive effect on the atmospheric ozone layer (that is, ODP is not zero), or the outlet The temperature is too high, so that the original compressor cannot work normally

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: 10% of HFC-134a, 10% of HFC-227ea and 80% of HFC-245fa were physically mixed in liquid phase.

Embodiment 2

[0031] Example 2: 45% of HFC-134a, 25% of HFC-227ea and 30% of HFC-245fa were physically mixed in the liquid phase.

Embodiment 3

[0032] Example 3: 80% of HFC-134a, 5% of HFC-227ea and 15% of HFC-245fa were physically mixed in liquid phase.

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PUM

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Abstract

A mixed working medium for the high-temp compression-type heat pump features no damage to ozone contains 1,1,1,2-tetrafluoroethane, 1,1,1,2,3,3,3-heptafluoropropane, and 1,1,1,3,3-pentafluoropropane. It is possible to add butane to it. Its advantages are no poison, incombustible, and high thermodynamic performance.

Description

technical field [0001] The invention relates to a mixed working medium used in a medium-high temperature heat pump unit, in particular to a mixed working medium which does not destroy the ozone layer at all (that is, the ozone destruction potential ODP=O). Background technique [0002] Heat pump technology uses geothermal water, groundwater, surface water (river water, lake water, sea water), industrial waste water and waste gas, atmosphere and other low-temperature and low-level heat energy resources, and adopts the heat pump principle to transfer low-level heat energy to high-level heat energy through a small amount of electric energy input, thereby An energy-saving and environment-friendly technology for heating and cooling. Heat pumps have the characteristics of high efficiency and energy saving, stable and reliable operation, significant environmental benefits, one machine with multiple functions, and effective use of waste heat energy. Therefore, it is currently a majo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/04
Inventor 史琳昝成朱明善韩礼钟董明孟富春李思雄
Owner TSINGHUA UNIV
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