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Preparation method for enhanced heat transfer type nano-refrigerant

A kind of refrigerant and nanotechnology, which is applied in the field of preparation of heat transfer-enhanced nano-refrigerants, can solve the problems of affecting the heat transfer performance of refrigerants, the influence of two-phase mixing degree, increasing equipment investment and energy consumption, and achieving heat transfer performance Excellent, low cost, and improved thermal conductivity

Active Publication Date: 2015-03-11
JUHUA GROUP TECH CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Existing methods must use mechanical stirring and disturbance to mix refrigerants, or add surfactants to form microemulsions. It is difficult for nanoparticles to be evenly distributed in the two-phase system, and it must be continuous even when additives are added. External stirring or circulation is applied to promote the mixing of the two phases. The presence or absence and continuity of this external force will greatly affect the mixing degree of the two phases, thus affecting the heat transfer performance of the refrigerant.
In addition, the external mechanical shear force, electromagnetic field and ultrasonic wave have greatly increased equipment investment and energy consumption.

Method used

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  • Preparation method for enhanced heat transfer type nano-refrigerant
  • Preparation method for enhanced heat transfer type nano-refrigerant
  • Preparation method for enhanced heat transfer type nano-refrigerant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Step 1: Nano-gadolinium oxide surface polymerization

[0025] According to 1g per serving, the polymerization ratio is as follows:

[0026]

[0027] According to the proportion of nano oxide gadolinium Disperse in ethanol, then add trifluoroethyl acrylate monomer, benzoyl peroxide, polyvinyl alcohol, sodium dodecylbenzenesulfonate, heat up, and react at 70°C for 9 hours to obtain surface-polymerized nano oxidationgadolinium Microsuspension.

[0028] Step 2: Blending

[0029] 0.008Kg step (1) prepares the nano-oxidized gadolinium Microsuspension with 98.3Kg 2,3,3,3-tetrafluoropropene (HFO1234yf), 1.6912Kg 1,2,3,3,3-pentafluoropropene (HFO-1225ye), 0.0008Kg 1-allyl-3- Methylimidazole hexafluorophosphate was pre-mixed in a 500L stirred reactor for 20h, and then added to a high-throughput microchannel glass reactor (produced by Corning Corporation of the United States, GEN-1 type), and passed through a sufficient flow rate of 10Kg / h Mix to obtain the product. The n...

Embodiment 2

[0031] Step 1: Nanooxidation gadolinium surface aggregation

[0032] According to 1g per serving, the polymerization ratio is as follows:

[0033]

[0034] Disperse nano-gadolinium oxide in ethanol according to the ratio, then add trifluoroethyl acrylate monomer, benzoyl peroxide, polyvinyl alcohol, sodium dodecylbenzenesulfonate, heat up, and react at 60°C for 15 hours, that is nano-oxidized gadolinium Microsuspension.

[0035] Step 2: Blending

[0036] 0.01Kg surface polymerized nano oxide gadolinium Microsuspension with 600Kg HFO1234yf, 399.985KgHFO-1225ye, 0.005Kg 1-allyl-3-methylimidazole hexafluorophosphate in 2m 3 Pre-mixed in a stirred reactor for 10 hours, then added to a high-throughput microchannel glass reactor (manufactured by Corning Corporation of the United States, GEN-2 type), and fully mixed at a flow rate of 40Kg / h to obtain the product, numbered as WN-2 .

Embodiment 3

[0038] Step 1: Nano-gadolinium oxide surface polymerization

[0039] According to 1g per serving, the polymerization ratio is as follows:

[0040]

[0041] Disperse nano-gadolinium oxide in ethanol according to the proportion, then add trifluoroethyl acrylate monomer, benzoyl peroxide, polyvinyl alcohol, sodium dodecylbenzenesulfonate, etc., heat up, and react at 80°C for 6 hours. nano oxide gadolinium Microsuspension.

[0042] Step 2: Blending

[0043] 0.1Kg surface polymerized nano oxide gadolinium Microsuspension with 800Kg HFO1234yf, 199.87Kg HFO-1225ye, 0.03Kg 1-allyl-3-methylimidazole hexafluorophosphate in 2m 3 Pre-mixed in a stirred reactor for 35 hours, then added to a high-throughput microchannel glass reactor (produced by Corning Corporation of the United States, GEN-3 type), and fully mixed at a flow rate of 100Kg / h to obtain a product number of WN-3.

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Abstract

The invention discloses a preparation method for an enhanced heat transfer type nano-refrigerant. The method comprises the steps of: (a) dispersing 5-15 parts by weight of nano-gadolinium oxide into 1000 parts of ethanol, then adding 1-10 parts of a trifluoroethyl acrylate monomer, 0.1-1 part of benzoyl peroxide, 0.1-2 parts of polyvinyl alcohol and 0.1-2 parts of sodium dodecyl benzene sulfonate to carry out reaction at 60-80DEG C for 6-15h, thus obtaining a surface polymerized nano-gadolinium oxide micro-suspension solution; (b) subjecting the nano-gadolinium oxide micro-suspension solution obtained in step (a) to liquid phase blending with 2, 3, 3, 3-tetrafluoropropene, 1, 2, 3, 3, 3-pentafluoropropene, 1-allyl-3-methylimidazolium hexafluorophosphate in a mass ratio of 1:8000-60000:10-40000:0.1-0.5, thus obtaining the enhanced heat transfer type nano-refrigerant. The method provided by the invention has the advantages of simple process, low cost, green and environmental protection, and product with excellent heat transfer performance.

Description

technical field [0001] The invention relates to a method for preparing a refrigerant, in particular to a method for preparing a heat-transfer-enhanced nano-refrigerant. Background technique [0002] In a refrigeration, air conditioning, or heat transfer system, it is expected that the lubricating oil and refrigerant may come into contact with each other in at least some portion of the system, as described in the ASHRAE Handbook: HVAC Systems and Equipment. Therefore, whether the lubricant and refrigerant are added to a refrigeration, air conditioning, or heat transfer system individually or as part of a premixed package, they are still expected to be in contact in the system and must therefore be compatible of. Due to the extremely fine grains, the atoms in the grain boundaries and defect centers in the grains and their own quantum size effects, small size effects, surface effects and macroscopic quantum tunneling effects make nanomaterials have special characteristics in l...

Claims

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Application Information

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IPC IPC(8): C09K5/04C08F120/22C08F2/20C08F2/44C08K3/22
CPCC08F2/20C08F2/44C08F120/22C08K3/22C08K2003/221C09K5/045C09K2205/126
Inventor 王金明
Owner JUHUA GROUP TECH CENT
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