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Energy-saving mixed refrigerant

A mixed refrigerant, difluorochloromethane technology, applied in the direction of sustainable manufacturing/processing, chemical industry, climate sustainability, etc., can solve the problem of inability to meet the temperature rise requirement of 70°C, high power consumption, failure to meet the requirements, etc. question

Inactive Publication Date: 2009-12-16
TIANJIN UNIV
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Problems solved by technology

The application of HCFC22 in the field of heat pumps is affected by pressure conditions, and the temperature rise can only reach about 50°C, and the power consumption is very large; ammonia will gradually withdraw from the commercial field under the condition that the health indicators are increasing day by day
[0003] With the increasingly widespread application of ground source heat pumps, the temperature rise of heat pumps is required to reach more than 70°C, so that HCFC22 can no longer meet the requirements
At present, R22 is the most commonly used refrigerant in heat pump systems, but it cannot meet the temperature rise requirement of 70°C at all. If new refrigerants can be used to replace refrigerant R22 in heat pump systems, it is expected to achieve the temperature rise under the condition of low energy consumption. The ideal temperature rise effect is the most simplified goal we pursue to increase the temperature rise
In addition, HCFC22 is still widely used in the field of commercial refrigeration, and the hydrocarbon R600a used for refrigeration in the same temperature zone can only be used in household refrigerators with a small amount of storage due to its flammable and explosive properties. Energy-saving refrigerants are also in urgent need of development

Method used

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  • Energy-saving mixed refrigerant

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Embodiment Construction

[0008] The present invention will be described in detail below in conjunction with specific embodiments.

[0009] A mixed refrigerant of the present invention is composed of the following components in mass percentage: 50-80% of difluorochloromethane and 50-20% of monochlorodifluoroethane.

[0010] The preparation method of the mixed refrigerant is as follows: at normal temperature, chlorodifluoromethane (HCFC-22) and chlorodifluoroethane (HCFC-142b) are physically mixed according to a predetermined mass ratio to form the refrigerant. The specific method is to extract and recover all the HCFC-22 working fluid in the heat pump air-conditioning system, and vacuum the system, and then pour HCFC-22 and HCFC-142b directly into the heat pump air-conditioning system according to the specified ratio.

[0011] In order to compare the energy-saving effects of different refrigerants and the degree of impact on the environment, the experimental data of mixed refrigerants (Table 1 below) a...

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Abstract

The invention relates to an energy-saving mixed refrigerant, which comprises the following components in percentage by mass: 50 to 80 percent of monochlorodifluoromethane, and 50 to 20 percent of chlorodifluoroethane. By replacing pure monochlorodifluoromethane (HCFC-22) into the mixed refrigerant consisting of the monochlorodifluoromethane (HCFC-22) and the chlorodifluoroethane (HCFC-142b) and using the different components of the mixed refrigerant, the temperature of a heat pump air-conditioning system can be raised to over 70 DEG C, the temperature also can be reduced to an index of less than 24 DEG C below zero for commercial refrigeration, and the energy-saving effect can be obtained at the same time.

Description

technical field [0001] The invention relates to a heat pump air conditioner and an energy-saving mixed refrigerant used in a commercial refrigeration system. Background technique [0002] Due to the increasingly widespread application of natural energy, ground source heat pumps have attracted people's attention. Most ground source heat pump air conditioners and commercial refrigeration systems currently in use mainly use ammonia and HCFC-22 as refrigerants. The application of HCFC22 in the field of heat pumps is affected by pressure conditions, the temperature rise can only reach about 50°C, and the power consumption is very large; ammonia will gradually withdraw from the commercial field when the health indicators are increasing. [0003] With the increasingly widespread application of ground source heat pumps, the temperature rise of heat pumps is required to reach more than 70°C, which makes HCFC22 unable to meet the requirements. At present, R22 is the most commonly us...

Claims

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Application Information

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IPC IPC(8): C09K5/04
CPCY02P20/10
Inventor 张于峰
Owner TIANJIN UNIV
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