Fluidized multiphase enhanced heat transfer method and heat transfer medium

A heat transfer medium, heat transfer enhancement technology, applied in chemical instruments and methods, heat transfer modification, heat exchange equipment, etc., can solve the problems of temperature fluctuation, increased cost, insufficient heat transfer capacity, etc.

Inactive Publication Date: 2006-02-08
李建民
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, due to the high frequency or large amplitude of fluctuations in the ambient temperature or the heat release / absorption in the heat exchange system, by changing the flow rate and operating pressure of the heat transfer medium, there will be hysteresis or insufficient capacity, resulting in heat transfer medium Even when the circulation volume is the largest, the heat to be removed or supplemented cannot be absorbed or released, and the heat exchange capacity is insufficient, which will cause undesirable fluctuations in the temperature of the regulated system or environment, making the purpose of heat transfer impossible. accomplish
The traditional method can ensure that the heat transfer can still be achieved when the heat changes by setting a large heat exchange area margin, but this will increase costs and waste a lot of materials, especially for weight, volume, and cost requirements. Heat transfer, using this method will not be able to achieve the purpose of thermal management and thermal control of heat transfer, such as the thermal management of computer CPU

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The suitable application fields of the fluidized multiphase enhanced heat transfer medium involved in this embodiment are: building heating, engine cooling, liquid cooling of electronic devices, temperature control of machinery and medical equipment, aerospace, and military affairs.

[0023] Basic heat transfer medium: water, the working temperature is 0-100°C, and the working pressure is normal air pressure.

[0024] Different auxiliary phase change heat transfer substances are adopted in the following different embodiments:

Embodiment 11

[0026] The auxiliary phase change heat transfer material is a liquid-gas phase change material, which is a mixture of methanol and ethanol. In this embodiment, the volume ratio of each component of the fluidized multi-phase enhanced heat transfer medium composed of the basic heat transfer medium and the auxiliary phase change heat transfer material is:

[0027] Water: 100, vaporization temperature is 100°C;

[0028] Methanol: 30, vaporization temperature: 64.7°C;

[0029] Ethanol: 40, vaporization temperature: 78.3°C;

[0030] The fluidized multiphase enhanced heat transfer method using this fluidized multiphase enhanced heat transfer medium is as follows: adding methanol and ethanol as heat transfer medium in water, at the heating end, as the temperature rises, methanol is first vaporized, Then ethanol is vaporized, and when it enters the condensation end, it is a vapor-liquid two-phase heat transfer medium. When the temperature is lower than 78.3°C, the ethanol cools and r...

Embodiment 12

[0032] In this embodiment, the solid-solid phase change material is used as the auxiliary phase change heat transfer material, and 2,2-dimethylol propanol (PG) is used as the material.

[0033] The volume ratio of each component of the fluidized multiphase enhanced heat transfer medium is:

[0034] Water: 100 parts

[0035] 2,2-Dimethylolpropanol (PG): 10 parts, phase transition temperature: 81.76°C, transition enthalpy: 172.458J / G;

[0036] The fluidized multiphase enhanced heat transfer method using this fluidized multiphase enhanced heat transfer medium is: adding solid-solid phase change substances in water as auxiliary phase change heat transfer substances, at the heating end of the heat exchange system, when the water When heated to 81.76°C, PG starts endothermic phase transition, and after reaching the condensation end, when the temperature is lower than 81.76°C, it begins to release heat, thereby realizing heat transfer using solid-solid phase transition and water wit...

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Abstract

The present invention discloses one kind of fluidized multiphase forced heat transfer method and heat transfer medium. Auxiliary phase change heat transfer matter is added into base heat transfer medium, so that within the temperature range without phase change heat transfer of the base heat transfer medium, the auxiliary phase change heat transfer matter performs phase change heat transfer, and while phase change heat transfer of the base heat transfer medium, the auxiliary phase change heat transfer matter performs phase change heat transfer under the temperature lower than the phase change temperature of the base phase change heat transfer medium. The said heat transfer method and heat transfer medium makes it possible to realize overall heat transfer control and management.

Description

technical field [0001] The invention relates to a method for enhancing heat transfer by using a fluidized heat transfer medium, and a fluidized strong heat transfer medium, which realizes the overall heat transfer of heat transfer by adding auxiliary phase-change heat transfer substances into the basic heat transfer medium. control and thermal management. Background technique [0002] Using heat transfer medium to transfer heat is the most common way of heat transfer, that is, to use heat transfer medium to absorb heat at the heat source, and make the heat transfer medium after absorbing heat release heat in the heat release device or heat release end, and reach the hot purpose. As a fluid, the heat transfer medium flows in a closed, closed or semi-closed system. This heat transfer method is widely used in industrial fields as well as civil and industrial equipment. [0003] The heat transfer process includes all processes of heat exchange, heat collection, heat dissipati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28F13/00C09K5/00
Inventor 李建民
Owner 李建民
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