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A medium and high temperature heat pump mixed working fluid

A mixed working medium and high-temperature heat pump technology, which is applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve problems such as insufficient lubrication, poor oil return, excessive lubricant retention, etc., to reduce friction and improve heat transfer efficiency , the effect of reducing environmental protection requirements

Active Publication Date: 2020-09-11
ZHEJIANG JUHUA NEW MATERIALS RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lubricants currently used commercially with refrigerants such as R-410A are not necessarily R-32 and HFC / HFO blends that are compatible under all conditions of use, causing insufficient lubrication in the system, poor oil return, and concerns about the possibility of excess lubricant hold-up

Method used

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  • A medium and high temperature heat pump mixed working fluid
  • A medium and high temperature heat pump mixed working fluid

Examples

Experimental program
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Effect test

preparation example Construction

[0031] The preparation method of the lubricating compatibilizer is as follows: in parts by weight, take 100 parts of poly-butene-1, 1-5 parts of 1,4,8,11-tetraazatetracyclo[4,11]diene , 0.01 to 0.06 parts of 2,4,6-tripyridyl triazine europium, 1 to 4 parts of benzoyl peroxide and 5 to 20 parts of white oil, react at a temperature of 40 to 60 ° C for 7 to 15 hours to get the product.

[0032] A method for preparing a medium-high temperature heat pump mixed working fluid as described above is adopted:

[0033] Physically mix 1,1,2,2-tetrafluoroethane, difluoroethane, and a lubricant compatibilizer in a liquid state according to the ratio to obtain a medium-high temperature new working medium suitable for normal temperature heat pump units.

Embodiment 1

[0037] Preparation of lubricant compatibilizer: by weight, 100 parts of poly-butene-1, 3 parts of 1,4,8,11-tetraazatetracyclo[4,11]diene, 0.03 parts of 2,4, 6-tripyridyltriazine europium, 2 parts of benzoyl peroxide, 13 parts of white oil, reacted at 48°C for 11 hours to obtain the product.

[0038] Preparation of refrigerant:

[0039] 1,1,2,2-Tetrafluoroethane 71%

[0040] Difluoroethane 28.5%

[0041] Lubrication compatibilizer 0.5%

[0042]The medium and high temperature new working fluid suitable for normal temperature heat pump units can be obtained by physically mixing the above various components according to their corresponding proportions in the liquid phase state.

[0043] The working medium of the present invention is directly poured into the existing HFC-134a air conditioning unit (without changing the lubricating oil), and converted into a medium-high temperature heat pump unit with a new working medium, and the cycle energy efficiency and the matching degree o...

Embodiment 2

[0046] Preparation of lubricant compatibilizer: by weight, 100 parts of poly-butene-1, 1 part of 1,4,8,11-tetraazatetracyclo[4,11]diene, 0.01 part of 2,4, 6-tripyridyl triazine europium, 1 part of benzoyl peroxide, 5 parts of white oil, react at 40°C for 15 hours to obtain the product.

[0047] Preparation of refrigerant:

[0048] 1,1,2,2-Tetrafluoroethane 60%

[0049] Difluoroethane 39.9%

[0050] Lubrication compatibilizer 0.1%

[0051] The medium and high temperature new working fluid suitable for normal temperature heat pump units can be obtained by physically mixing the above various components according to their corresponding proportions in the liquid phase state.

[0052] The design conditions of the heat pump system are taken as: the average evaporation temperature is 15°C, the average condensation temperature is 75°C, the constant entropy efficiency of the compression process is 80%, and there is no supercooling and superheating regulation.

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Abstract

Disclosed in the present invention is a medium-high temperature heat pump mixed working medium, which is suitable for being used as a refrigerant of a medium-high temperature heat pump system at a condensation temperature of 60- 110ºC. The mixed working medium is a ternary mixture which is prepared from HFC-134, HFC-152a, and a lubricating compatilizer in different mass proportions. A preparation method for the mixed working medium comprises: physically mixing all the components in a specified proportion at room normal temperature to obtain the corresponding mixed working medium. The present working medium does not damage an ozone layer, meets an environment-friendly requirement, and has an appropriate thermal parameter and excellent circulation performance; an HFC-134a air conditioner compressor can be used to optimize design of a medium-high temperature heat pump system with a novel working medium, and the novel working medium can also be directly applied to an original HFC-134a air conditioning unit to convert the original air conditioning unit into a medium-high temperature heat pump unit with a novel working medium.

Description

technical field [0001] The invention belongs to refrigerants in heat pumps or refrigeration and air-conditioning systems, and in particular relates to a medium-high temperature heat pump mixed working medium. Background technique [0002] A heat pump is a device that can obtain low-level heat energy from natural air, water or soil, and provide high-level heat energy that can be used by people through electrical work. In recent years, the global heat pump technology has developed rapidly, and Japan and Europe have already developed heat pump technology. China's heat pump market is in its infancy, but with the increasingly prominent problems of air quality (such as smog) and environmental protection, the heat pump market will develop rapidly. Medium and high temperature heat pumps are mainly used for rapid dehydration of vegetables and tobacco fumigation; compared with traditional coal burning or boiler heating, high temperature heat pumps are safe and environmentally friendl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/04
CPCC09K5/045C09K2205/122
Inventor 王斌辉张品杰童灿辉王金明
Owner ZHEJIANG JUHUA NEW MATERIALS RES INST CO LTD
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