CN1305996C

CN1305996C - Heat pipe phase changing liquid

Info

Publication number: CN1305996C
Application number: CNB031078044A
Authority: CN
Inventors: 郑尔历
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-03-18
Filing date: 2003-03-18
Publication date: 2007-03-21
Anticipated expiration: 2023-03-18
Also published as: CN1532258A

Abstract

The present invention discloses a phase-transition liquid for a heat pipe, which solves the problem of environmental pollution of the existing heat pipe product. The phase-transition liquid mainly contains the following raw materials by volume percentage: 10 to 90% of water, 2 to 65% of edible vegetable oil, 5 to 85% of spirit, 20 to 80% of anhydrous alcohol and 0.5 to 3% of glycerol. According to different temperatures and materials of heat pipes in actual use, the phase-transition liquid for a heat pipe of the present invention can select 4 to 10 raw materials to meet the needs of the heat pipes at below 1000 DEG C. The present invention uses common food-grade substances in life to replace a phase-transition liquid as a working medium in a synthetic heat pipe made of toxic and harmful substances in a traditional heat pipe technology, and therefore, the present invention can reach the aim of environmental protection.

Description

The heat pipe phase-transition liquid

Technical field the present invention relates to the working medium of heat pipe in the thermal engineering.

Background technology is present, the phase-transition liquid that uses in the conventional heat pipe technology, the overwhelming majority is poisonous, deleterious inorganic chemical industry material, though can obtain the superperformance of " efficient, energy-conservation ", but in the manufacturing, transportation and storage, use and use in the link such as back destruction etc., can break unavoidably, nature or contingent such as leakage, cause the injury of human body and the pollution of environment, in foodstuffs industry and food-processing, can not use simultaneously.Useful aluminium and aluminum alloy materials be as scatterer in the prior art, because the aluminum alloy materials fatal characteristics of salt tolerant, alkali not itself, coating for protection against corrosion is protected in just adopting, and effect is unsatisfactory; This is because in the big system of hot-water heating, be in the heat recirculated water of saline alkali, having a certain amount of hard particles unavoidably exists, recirculated water at high-voltage high-speed washes away down, preservative coat than vulnerable area must corrode cavitation so by quick-wearing very as long as recirculated water one touches the aluminium matter part of scatterer essence, leaking will very fast generation.Electroplating process when doing coating for protection against corrosion often causes severe contamination to environment.

Summary of the invention the present invention has overcome the shortcoming of prior art, has solved existing heat pipe product contamination problem of environment.

Heat pipe phase-transition liquid of the present invention mainly comprises four kinds in the following volume content raw material:

10～90% water----are selected from ordinary tap water, distilled water or pure water,

2～65% edible vegetable oils (in stainless steel and steel heat pipe, reducing the phase-transition liquid hydrogenization),

15～85% liquor----are selected from the type of the drinking liquor that alcoholic strength is 20～60 degree,

20～80% dehydrated alcohols,

0.5～3% glycerine (medical common glycerine);

Wherein raw material also comprises:

0.05～4% salt (being prepared into saturated solution)----is selected from iodized salt or iodized salt not,

0.001～5% gentian voiet (medical gentian violet solution),

0.001～2% tinctura camphorae (camphor is dissolved in the saturated solvent of alcohol), 0.1～3% edible-type aluminium hydroxide,

0.001～0.01% food flavour, 0.001～0.01% toilet water (being selected from the various toilet water of selling in the market),

0.001～0.05% essential balm (being selected from the essential balm of selling in the pharmacy).

Temperature is 0～100 ℃ in heat pipe, and the heat pipe material is an aluminium alloy, and phase-transition liquid comprises the raw material of following volume percent: 20～75% water, 20～78% dehydrated alcohols, 0.01～5% gentian voiet.Such prescription can solve the etching problem of aluminium alloy heat radiator, need not do interior preservative coat more simultaneously.

Temperature is 100～300 ℃ in heat pipe, and when the heat pipe material was copper, phase-transition liquid comprised the raw material of following volume percent: 35～78% water, 20～60% liquor, 1～3% glycerine, 0.05～2% salt (saturated solution).

Temperature is 300～500 ℃ in heat pipe, when the heat pipe material was stainless steel, phase-transition liquid comprised the raw material of following volume percent: 22～50% water, 2～5% edible vegetable oils, 20～40% liquor, 25～30% dehydrated alcohols, 0.5～3% edible-type aluminium hydroxide, 0.001～0.005% toilet water, 0.001～0.005% essential balm.

Temperature is 500～900 ℃ in heat pipe, when the heat pipe material was steel, phase-transition liquid comprised the raw material of following volume percent: 20～60% edible vegetable oils, 15～30% liquor, 20～60% dehydrated alcohols, 0.1～0.5% gentian voiet, 0.5～2% tinctura camphorae (camphor is dissolved in the saturated solvent of alcohol).

Compound method: with distilled water salt is made saturated solution earlier, each raw material is mixed getting final product then under 10～15 ℃ of envrionment temperatures.

Heat pipe phase-transition liquid of the present invention, the temperature of the heat pipe that can use according to reality, the difference of material are selected 4～10 kinds of raw materials for use, just can satisfy the heat pipe use below 1000 ℃.

Selection in the component of the present invention is mainly considered to utilize: the good characteristics of heat conduction interconvertibility of water; Edible vegetable oil is suitable for temperature more than 500 ℃, and thermal conductivity is big, prevents the hydrogenization of phase-transition liquid in the high temperature in stainless steel and steel heat pipe; The good characteristics of heat conduction phase transformation security of liquor; The phase transformation performance of dehydrated alcohol is good, improves the phase-transition liquid performance; Glycerine increases phase velocity and lubrication when high temperature; The thermal capacity of salt is big, and the high temperature thermal conductivity is good; Gentian voiet plays anticorrosion spike effect; Tinctura camphorae can improve the interconvertibility of phase-transition liquid; Edible-type aluminium hydroxide can improve interconvertibility, accelerates phase-transition liquid by the phase transformation of gas to liquid; That other component plays is anticorrosion, spike, improve the effect of smell.

Heat-pipe radiator with aluminum alloy material is an example, and scatterer is made an integral heat pipe, and the inside charges into a certain amount of working medium (phase-transition liquid), makees a copper logical hot-water line in its underpart, and the recirculated water in the hot-water heating passes through from copper pipe.Thereby recirculated water and aluminum alloy material are separated completely, when circulating hot water passes through copper pipe, copper pipe is heated, the while heating working medium, make the Working fluid phase changing vaporization, the high-temperature steam of vaporization is full of entire radiator rapidly with supersonic speed, after the heat radiation of the outer wall of scatterer, be phase-changed into liquid again along the heat radiation wall and under action of gravity, flow to the heating copper tube of bottom, be transformed into gas once more after absorbing the heat of copper pipe, heat is passed to the inwall of scatterer again, the circulation that goes round and begins again like this, as long as copper pipe is hot, this process just goes on automatically, heat transfer efficiency is high, and the bottom highest temperature zone and the top minimum temperature district temperature difference are less than 3 ℃.Because the phase-transition liquid non-corrosiveness, coating for protection against corrosion in so just need not requiring again to do in scatterer has reduced cost.

The present invention is owing to utilize all materials in the food grade scope commonly used in the life, replace using in the conventional heat pipe technology by the working medium-phase-transition liquid in poisonous, the objectionable impurities institute synthetic heat pipe, can reach the purpose of environmental protection, adopt the present invention to make heat pipe, both can obtain the superperformance of " efficient, energy-conservation " of conventional heat pipe, again can be in the manufacturing, transportation and storage, use and use on the link such as back destruction etc., guarantee that the person and environmental safety and opposite heat tube material do not have corrosion.Use hot pipe technique of the present invention, have been widely used, for example often its pocketed heat when grain is stacked, at this moment the heat pipe that just the present invention can be made inserts in the grain heap heat is discharged, and also can not cause damage just in case there is accidental cause that the heat pipe phase-transition liquid is revealed; And it is just more extensive in Application in Food Industry.

Utilize heat pipe supersonic heat transfer characteristics and be operated under the molecule phase transformation process of liquid-gas-liquid (promptly by) pattern, the characteristics that heat in the electric energy is given full play of, saved the energy greatly, according to the difference of envrionment temperature, reducing power consumption is in 20%～59% scope.

In the experiment, done four kind 20 with the present invention surplus a heat pipe, done two heat pipes with traditional chemical industry material (methyl alcohol, acetone), after tested, on spirit lamp, heat simultaneously, through 30.5 seconds heat pipes heat all with the present invention heat pipe of doing and the heat pipe of making of conventional matter; Put into the 95 hot water heating of spending 28 seconds, two kinds of also hot simultaneously tops of arriving of contrast heat pipe illustrate that heat-transfer rate is equally fast, and superior heat conductivity can be the same.But conventional heat pipe cost height, and smoked in the mill people are not also hurted sb.'s feelings and the heat pipe cost of making of the present invention is low.

The control experiment table

	The heat pipe that the present invention makes	The heat pipe that tradition phase-transition liquid (methyl alcohol, acetone) is made	Effect
	The heat pipe that the present invention makes		Effect	95 ° of heating in water bath	From 28 seconds 15～60 ℃ of times spent	From 28 seconds 15～60 ℃ of times spent	Identical
The spirit lamp heating	From 30.5 seconds 10～60 ℃ of times spent	From 30.50 seconds 10～60 ℃ of times spent	Identical	95 ° of heating in water bath	From 28 seconds 15～60 ℃ of times spent	From 28 seconds 15～60 ℃ of times spent	Identical
The spirit lamp heating	From 30.5 seconds 10～60 ℃ of times spent	From 30.50 seconds 10～60 ℃ of times spent	Identical	Common copper tube	Diameter of phi=8 millimeter, long 40 millimeters	Diameter of phi=8 millimeter, long 40 millimeters	Identical

The embodiment the following examples can make those skilled in the art more fully understand the present invention, but do not limit the present invention in any way.

Embodiment 1:

Temperature is 0～100 ℃ in heat pipe, when the heat pipe material is aluminium alloy, is configured to phase-transition liquid by 70 milliliters ordinary tap water, 29.99 milliliters dehydrated alcohol and 0.01 milliliter gentian voiet.

Embodiment 2:

Temperature is 100～300 ℃ in heat pipe, when the heat pipe material is copper, is configured to phase-transition liquid by 75 milliliters of ordinary tap water, 20 milliliter of 60 type of drinking liquor, 2 milliliters of iodized salt (saturated solution) of spending.

Embodiment 3:

Temperature is 300～500 ℃ in heat pipe, when the heat pipe material is stainless steel, be that 45 degree are drunk the essential balm of buying in the Liushen toilet water bought in type liquor, 28 milliliters of dehydrated alcohols, 1.996 milliliters of edible-type aluminium hydroxide, the 0.002 milliliter of market, the 0.002 milliliter of pharmacy and are configured to phase-transition liquid by 35 ml distilled waters, 5 milliliters of edible vegetable oils, 30 ml ethanol degree.

Embodiment 4:

Temperature is 500～900 ℃ in heat pipe, when the heat pipe material is steel, drinks type liquor, 60 milliliters of dehydrated alcohols, 0.5 milliliter of gentian voiet, 1.5 milliliters of tinctura camphoraes (being dissolved in the saturated solvent of alcohol) and be configured to phase-transition liquid by 20 milliliters of edible vegetable oils, 18 milliliter of 56 degree.

Claims

1, a kind of heat pipe phase-transition liquid, it is characterized in that: temperature is 300～500 ℃ in heat pipe, when the heat pipe material is stainless steel, phase-transition liquid comprises the raw material of following volume percent, and 22～50% ordinary tap water, distilled water or pure water, 2～5% edible vegetable oils, 20～40% alcoholic strengths are the type of drinking liquor, 25～30% dehydrated alcohols, 0.5～3% edible-type aluminium hydroxide, 0.001～0.005% toilet water and 0.001～0.005% essential balm of 20～60 degree.