Nano-fluid superconduction liquid for heat pipe type vacuum collector tube and preparation method of nano-fluid superconduction liquid

A vacuum heat collecting tube and nanofluid technology, applied in chemical instruments and methods, heat exchange materials, etc., can solve the problems of slow startup of superconducting liquid, inability to quickly evaporate heat transfer, low heat transfer efficiency of heat pipes, etc., and achieve production cost Effects of low cost, easy mass production, and simple production method

Inactive Publication Date: 2016-08-17
GAOYOU JIUCHUANG INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The superconducting liquid generally used now starts relatively slowly, and cannot quickly evaporate and transfer heat when it absorbs a certain amount of heat. The heat absorbed by a unit volume of superconducting liquid is less, which leads to low heat transfer efficiency of the entire heat pipe. Nanofluid superconducting liquid can effectively solve this problem

Method used

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Examples

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Effect test

preparation example Construction

[0022] The vapor deposition method combines the preparation of nanoparticles with the preparation of nanofluids. The prepared nanoparticles are small, and the nanoparticles are uniformly dispersed in the liquid and have good stability. However, this method is only suitable for preparing nanofluids containing metal particles in fluids with low vapor pressure. Moreover, the requirements for equipment are relatively high, the cost is high, the output is small, and it is not easy for industrialized production, thereby affecting the general application of the method. The preparation method described in this application is the dispersion method.

[0023] In this application, Cu or graphene nano-scale particles are mainly used for heat conduction.

Embodiment 1

[0025] Cu nanoparticles are used as the additive, the particle size of the Cu nanoparticles is 100nm, and the weight part is 20 parts; the ethanol aqueous solution is used as the base liquid, the dispersant is polyethylene glycol, and the average molecular weight of the polyethylene glycol is 800.

[0026] Firstly, a surfactant is added to the ethanol aqueous solution, and Cu nanoparticles are added half an hour later, and magnetically stirred to make a suspension, and then ultrasonically dispersed to make a nanofluid. Put the prepared nanofluid into the heat pipe type vacuum heat collector, and the solar suffocation experiment shows that in the heat absorption process of a day, the water temperature of the nanofluid superconducting liquid group is higher than that of the conventional superconducting liquid group 5~7℃.

Embodiment 2

[0028] Cu nanoparticles are used as additives, the particle size of Cu nanoparticles is 60nm, and the weight part is 10 parts; ethanol aqueous solution is used as the base liquid, the dispersant is polyethylene glycol, and the average molecular weight of polyethylene glycol is 400.

[0029] Firstly, a surfactant is added to the ethanol aqueous solution, and Cu nanoparticles are added half an hour later, and magnetically stirred to make a suspension, and then ultrasonically dispersed to make a nanofluid. Put the prepared nanofluid into the heat pipe type vacuum heat collector, and the solar suffocation experiment shows that in the heat absorption process of a day, the water temperature of the nanofluid superconducting liquid group is higher than that of the conventional superconducting liquid group Out of 6 ~ 9 ℃.

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Abstract

The invention discloses nano-fluid superconduction liquid for a heat pipe type vacuum collector tube. The nano-fluid superconduction liquid comprises, by weight, 10-20 parts of additives, 60-75 parts of base liquid, 10-25 parts of dispersing agent and 5-15 parts of surfactant. A preparation method of the nano-fluid superconduction liquid includes: adding the surfactant into the base liquid, adding the additives after half an hour, magnetically stirring to prepare suspension, and using ultrasonic dispersing to prepare the nano fluid. Actual solar energy irradiating experiments show that the nano-fluid superconduction liquid is higher in heat conduction efficiency as compared with conventional superconduction liquid. Meanwhile, the nano-fluid superconduction liquid is safe, nontoxic, low in preparation cost, simple in preparation method, capable of evidently increasing the working efficiency of a solar utilization system and good in economic and social benefits.

Description

[0001] technical field [0002] The application relates to the technical field of solar water heaters, in particular to a nanofluid superconducting liquid for a heat pipe type vacuum heat collecting tube and a preparation method thereof. Background technique [0003] As an efficient and environmentally friendly household bathing device, solar water heaters have entered most small and medium-sized households. The emergence of solar energy marks that human beings have initially conquered nature. Exhausted energy laid the foundation. Most of the solar energy sold on the market is mostly vacuum tube collectors, and heat pipe vacuum collector tubes are particularly common. The heat pipe vacuum tube is mainly composed of heat pipes, heat absorbing plates, glass tubes and other parts. Its working principle is that the sunlight shines on the heat absorbing plate through the glass tube, and the selective solar absorbing film with high absorption rate converts the solar radiation en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/08C09K5/10C09K5/14
CPCC09K5/08C09K5/10C09K5/14
Inventor 凌兵媛
Owner GAOYOU JIUCHUANG INFORMATION TECH CO LTD
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