CN203240811U - Heat collection element for accelerating start of glass heat tube through sparse core net - Google Patents
Heat collection element for accelerating start of glass heat tube through sparse core net Download PDFInfo
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- CN203240811U CN203240811U CN2013202087655U CN201320208765U CN203240811U CN 203240811 U CN203240811 U CN 203240811U CN 2013202087655 U CN2013202087655 U CN 2013202087655U CN 201320208765 U CN201320208765 U CN 201320208765U CN 203240811 U CN203240811 U CN 203240811U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/44—Heat exchange systems
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Abstract
Disclosed is a heat collection element for accelerating start of a glass heat tube through a sparse core net. The heat collection element is formed by a cover glass tube and an inner glass tube in a concentrically-nested mode, the inner glass tube extends out from a seal connection portion and is made into the heat tube, and the heat collection element is characterized in that the sparse core net formed by a plurality of slim capillary liquid absorbing cores with a width of 2-10mm is arranged in a hot end of the heat tube. The heat collection element for accelerating start of the glass heat tube through the sparse core net is formed by connecting a full-glass evacuated collector tube and the inserting-type glass heat tube through heat transmission, and is characterized in that the sparse core net formed by the slim capillary liquid absorbing cores with the width of 2-10mm is arranged in the hot end of the inserting-type glass heat tube. Due to the fact that the sparse core net is arranged on the inner wall of the heat tube, start time of the heat tube is shortened to about 10min from original more than 140min for start of a light tube, and the energy efficiency ratio of the heat tube and the evacuated collector tube is greatly improved; the filling amount of working media of the heat tube is not increased basically, and therefore in the process of idle sunning, the vapor pressure in the heat tube is not increased basically, either.
Description
Technical field
The utility model relates to sparse core net and accelerates the heat collecting element that glass heat pipe starts.
Background technology
That the solar water appliance of heat-pipe vacuum heat collecting pipe manufacturing has is anhydrous in the pipe, meet that safe drinking water standard, Energy Efficiency Ratio are high, single tube damages the advantage such as in the same old way work.Therefore.Anhydrous solar vacuum hot water device might capture the increasing market share in the pipe.
Existing a kind of workload fills all-glass heat pipe vacuum collector tube solar water heater seldom, and heat pipe inner wall adopts light-pipe structure, heat-pipe vacuum heat collecting pipe 45 degree that tilt approximately to install.Under non-heat exchange state, can observe the heat pipe bottom has liquid refrigerant to gather.
It is carried out and the all-glass vacuum thermal-collecting tube solar water heater check experiment of managing interior water, find that the intensification situation of heat pipe solar energy water heater is slow soon rear first.Judgement is that the heat pipe start-up course is long, the startup stage of heat pipe, the heat collector tube product can not Operation at full power thereby heat up slow, heat pipe heat collecting device Operation at full power thereby quick heating after heat pipe starts.
The heat pipe of investigating all-glass heat pipe vacuum collector tube starts: because it is common because its temperature of minute surface shading that is formed by getter rises slowly, so that these liquid refrigerants can not participate in rapidly the two phase flow heat transfer circulation to be collected in the working medium of heat pipe bottom.Simultaneously, though because the temperature at inner other positions, heat pipe hot junction is high is in dry state and can not contributes to thermal-arrest within a very long time.Rely on later on the glass heat pipe tube wall heat transfer near the bottom to make gradually liquid refrigerant vaporization and circulation participate in two phase flow heat transfer, heat pipe is finished start-up course and is entered normal operating conditions.Problem is in the winter time, and the start-up course of heat pipe may continue more than two hours, and this is so that the performance of some glass heat pipe thermal-collecting tube can not be obviously good than the all-glass vacuum thermal-collecting tube of managing interior water, and the advantage of heat pipe fails to give full play to.
Glass surface is not suitable for processing stria to form larger capillary lift.
Employing arranges to have enough large-area core nets at the glass heat pipe inner surface, although can utilize capillarity to solve the long problem of heat pipe start-up course, but can make cost a larger increase, more seriously also can working medium is more, vapour pressure is too high when making air drying causes that having a big risk of bombing accident is large to be increased because inside fills.When 0.2% when for example working medium filling weight/heat pipe plot ratio is from 2 milliliters/1000 milliliters are brought up to 5 milliliters/1000 milliliters 0.5%, the highest saturated vapor pressure increases to approximately 10 atmospheric pressure of 180 ℃ from approximately 3.7 atmospheric pressure of 140 ℃, but inside heat pipe when approximately 3.7 atmospheric high-vapor-pressures continue to be warming up to 180 ℃ from 140 ℃ internal pressure only have about 4 atmospheric pressure.Because the glass voltage endurance capability is limited, so the liquid refrigerant position height start quickly in the time of should managing to raise heat pipe and start the least possiblely when heat pipe work is again held back liquid refrigerant with minimizing working medium filling weight.
Chinese invention patent 200410012193.9 Explosion-proof all-glass solar energy vacuum collecting tubes have disclosed a kind of Explosion-proof all-glass solar energy vacuum collecting tube, and the liquid refrigerant filling weight is 0.1～0.5%V in its heat pipe, and wherein V is the volume in the heat pipe.All be converted into vapour phase when making it reach a certain critical-temperature, when temperature continued to raise, pressure raise according to the rule of vapour phase, thereby had significantly reduced the operating pressure in the heat pipe under the condition of high temperature ...Simultaneously, in heat pipe, set up sorbing material, to guarantee that heat pipe quick starts again.But this patent of invention comprises that in heat pipe sorbing material sticking working medium that heat pipe evaporator section middle part arranges adds quick heating pipe and starts this mode and still can bring when increasing working medium filling weight and air drying internal pressure or start still slower problem.Suppose: originally set and be limited to 4 atmospheric pressure, 230 ℃ of air drying maximum temperatures, water on 4.4 millimeters of inner glass tube internal diameters, 58 millimeters of cover glass tube external diameters, long 2 meters the internal pressure of all-glass vacuum solar energy collection tube and make working medium, can be calculated approximately 3 liters of inner glass tube volumes.Look into the saturated vapor pressure table of water vapour as can be known: whole working medium filling weight of working medium vaporization just in the time of 135 ℃, its saturated vapor pressure is 3.2 atmospheric pressure and when 230 ℃ of the highest air drying temperature, internal pressure reaches 4 atmospheric pressure and namely equals the inner glass tube internal pressure limit.And the quality volumetric ratio of steam is 1.7 milliliters/liter can check in 135 ℃ the time.The working medium filling weight of this thermal-collecting tube is 1.7 milliliters/liter=5.1 milliliters of 3 liters of *.(5.1 milliliters of working medium are on the low side for existing thermal-collecting tube, can occur drying up in the bottom, hot junction, but this problem do not done expansion here).At this moment, quick heating pipe starts and imbibition material is set in the middle part of inside heat pipe in order to add.Suppose that the imbibition material that increases carries sticking altogether 1.5 milliliters of working medium have been arranged when heat pipe works, and therefore aggravate inside heat pipe hot junction dry-out, dry hot junction does not participate in heat exchange has a greatly reduced quality the efficient of thermal-collecting tube.For fear of the heat-collecting capacity loss that brings because the hot junction is dry.Must increase the working medium filling weight remedies heat pipe when work and is put forward the part working medium that sticking has by imbibition material.Suppose that the working medium filling weight that increases also is 1.5 milliliters, the quality volumetric ratio of the steam when then working medium is just all vaporized from 1.7 milliliters/go up and rise to 2.2 milliliters/liter, the critical-temperature that the highest saturated vapor pressure at this moment is corresponding rises to 145 ℃ from 135 ℃; Correspondingly, when 230 ℃ of the highest air drying temperature, inside heat pipe pressure is increased to 5 atmospheric pressure from 4 atmospheric pressure.Conclusion is: increase imbibition material and increase the working medium filling weight in order to accelerate to be enabled in middle part, heat pipe hot junction, under the highest air drying temperature, the pressure of thermal-collecting tube inside can increase to 5 atmospheric pressure from 4 atmospheric pressure above original pressure of setting and exceed 25%; Be equivalent to reduce winter a day heat-collecting capacity 35% and will prolong two hours without imbibition material heat pipe start-up course.Also have, only 1.5 milliliters of working medium of sticking are still not enough for sorbing material.
Summary of the invention
The purpose of this utility model is to provide sparse core net to accelerate the heat collecting element that glass heat pipe starts.
One of the technical scheme in the invention for solving the technical problem: arrange sealing-in with cover glass tube and inner glass tube nested, concentric, make a sparse core net and accelerate the heat collecting element that glass heat pipe starts.Inner glass tube from sealing-in place stretch out and inner vacuum pumping loading working medium after sealed-off make a heat pipe.The outer surface of inner glass tube is made absorbing film.It is vertical or tilt to install that described sparse core net accelerates heat collecting element that glass heat pipe starts.Heat pipe relies on gravity work.A sparse core net that is comprised of the slice capillary wick of 2 to 10 millimeters of some width is set in inside, heat pipe hot junction, and sparse core net adopts elastic circlip to overlay in heat pipe hot junction inwall.The area of sparse core net is less than 5% of described heat pipe inner wall area.
Can also make the relative cover glass tube arranged off-centre of described inner glass tube, described inner glass tube is connected with semicircle minute surface optically focused on being made in cover glass tube; Perhaps described inner glass tube is connected with an additional semicircle minute surface optically focused that is connected on cover glass tube.
Two of the technical scheme in the invention for solving the technical problem: be connected with the cooperation of insertion type glass heat pipe or the heat transfer of inserting wherein with an all-glass vacuum thermal-collecting tube, make a sparse core net and accelerate the heat collecting element that glass heat pipe starts.All-glass vacuum thermal-collecting tube is made by cover glass tube and the sealing-in of inner glass tube nested, concentric layout.A sparse core net that is comprised of the slice capillary wick of 2 to 10 millimeters of some width is set in inside, insertion type glass heat pipe hot junction, and sparse core net adopts elastic circlip to overlay in heat pipe hot junction inwall; The area of sparse core net is less than 5% of described heat pipe hot junction inner wall area.
Sparse core net useable glass fiber, carbon fiber and copper wire are made; Elastic circlip available copper sill is made.
Can also make described sparse core net be formed by several annular fillet capillary wick according to circumferential layout.
Can also make: 40 ± 5 ℃ of the water temperatures in 700 ± 50 watts/square metre of solar radiation quantities, the described heat pipe cold junction outside, heat collecting element axial line be that the north-south is in tilted layout and the angle of its axial line and incident sunlight in 90 ± 20 ° of scopes under the condition, sparse core net is held 25% of the quality of liquid refrigerant≤its maximum liquid refrigerant volume of holding.
Can also make: the maximum liquid refrigerant volume of holding of described sparse core net 〉=4 milliliters; 40 ± 5 ℃ of the water temperatures in 700 ± 50 watts/square metre of solar radiation quantities, the described heat pipe cold junction outside, heat collecting element axial line be that the north-south is in tilted layout and the angle of its axial line and incident sunlight in 90 ± 20 ° of scopes under the condition, described sparse core net is held the quality of liquid refrigerant≤0.9 milliliter.
The beneficial effects of the utility model: the sparse core net of employing the utility model accelerates the heat collecting element of integrated glass heat pipe startup or the solar energy heat collector of the heat collecting element manufacturing that sparse core net accelerates the startup of insertion type glass heat pipe, when the sun sets, the reverse work of glass heat pipe: the evaporation of the liquid refrigerant of the former heat pipe cold junction inner surface that is connected with the heating load low thermal resistance is also condensed at former heat pipe hot junction inner surface, when former heat pipe hot junction inner surface liquid refrigerant gathers more and held by it during the sparse core net of downward trickling arrival.The second day sun is out the time, and in a single day the heat pipe hot junction is heated, rapidly evaporation and participate in two phase flow heat transfer of the liquid refrigerant that is held by sparse core net.Sparse core net distributes wide, and the solar energy heat absorbing area that relates to is also wide thereby start rapidly; Sparse core net distributes sparse, and during the heat pipe normal operation, the liquid refrigerant that sparse core net is held is less for example less than 0.3 milliliter, its during to air drying the increase of internal pressure very limited.The sparse core net of employing the utility model accelerates the heat collecting element of integrated glass heat pipe startup or the various solar energy heat collectors of the heat collecting element manufacturing that sparse core net accelerates the startup of insertion type glass heat pipe, its heat pipe start-up time was from more than 140 minute of original light pipe, foreshorten to more than 10 minute, be equivalent to many thermal-arrests more than hour every day in winter.Thereby both having accelerated to greatest extent heat pipe starts; The pressure of glass heat pipe inside keeps low level when making air drying again.
Make that described sparse core net is the some sparse core nets that form according to the annular fillet capillary wick of circumferential layout; Described annular fillet capillary wick is each to the same sex not: more weak along circumferential capillarity.The more working medium of sticking in the process that can set at the sun that the duration is grown relatively; Thereby make a little less than the capillarity when the normal heat exchange of heat pipe in the circumferential direction of the circle annular fillet capillary wick except the bottom all because capillary is proposed the suction effect has no time to attend to and occurs drying up, and make working medium along the heat pipe inner wall bottom toward the dirty bottom that is distributed in whole heat pipe hot junction.Make described sparse core net contain the fiber of arranging in the circumferential direction of the circle few; The fiber of arranging along annular fillet capillary wick direction of axis line is many, be realize desired annular fillet capillary wick for each to one of means of the same sex not.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is that a sparse core net accelerates the heat collecting element structural representation that the integrated glass heat pipe starts.
Fig. 2 is that a sparse core net accelerates the heat collecting element structural representation that the insertion type glass heat pipe starts.
Fig. 3 is that a sparse core net accelerates the eccentric heat collecting element structural representation that the insertion type glass heat pipe starts.
1. cover glass tubes among the figure; 2. inner glass tube; 3. heat pipe; 4. annular fillet capillary wick; 5. elastic circlip; 6. all-glass vacuum thermal-collecting tube; 7. Thermal Conduction Equipment; 8. eccentric all-glass vacuum thermal-collecting tube; 9. semicircle minute surface.
The specific embodiment
Fig. 1 provides first embodiment of the present utility model.
Among Fig. 1, arrange sealing-in with cover glass tube 1 and inner glass tube 2 nested, concentric, make a sparse core net and accelerate the heat collecting element that the integrated glass heat pipe starts.Inner glass tube 2 from sealing-in place stretch out forward and inner vacuum pumping loading working medium after sealed-off make a heat pipe 3.The outer surface of inner glass tube 2 is made absorbing film.It is vertical or tilt to install that described sparse core net accelerates heat collecting element that the integrated glass heat pipe starts.Heat pipe 3 relies on gravity work.In inside, heat pipe 3 hot junction 10 annular fillet capillary wick 4 according to circumferential layout are set and form a sparse core net.Annular fillet capillary wick 4 usefulness elastic circlips 5 overlay in heat pipe 3 hot junction inwalls.1 meter 8 of the hot end length of heat pipe 3; 5 millimeters of the width of annular fillet capillary wick 4.The area sum of annular fillet capillary wick 4 is less than 2.8% of described heat pipe 3 hot junction inner wall areas.Side by side outside arrow represents the cold junction position of heat pipe 3 among Fig. 1.
When the heat collecting element of Fig. 1 embodiment turned clockwise approximately 45 degree inclination installation, heat pipe 3 can rely on gravity to realize the two phase flow cycle heat exchange, and solar thermal energy is passed to heating load by cold junction continuously.During heat pipe 3 work, because short cylinder liquid-sucking core 4 can not held working medium, so the working medium filling weight does not increase, heat pipe 3 inner saturated vapor pressures are in low-level when being conducive to limit air drying.
When the heat collecting element of Fig. 1 embodiment turns clockwise that approximately 45 degree tilt to install, annular fillet capillary wick 4 can be when heat pipe 3 not be worked a large amount of sticking liquid refrigerants, improve the position that former light pipe heat pipe is collected in the working medium of heat pipe 3 bottoms.Annular fillet capillary wick 4 absorbed solar thermal energy as much as possible and accelerates to start when the annular fillet capillary wick 4 that is distributed in whole heat pipe 3 hot junctions was conducive to heat pipe 3 and starts.
Among Fig. 1 embodiment, so allow annular fillet capillary wick 4 dry or partly dry annular fillet capillary wick 4 when heat pipe 3 work, usually not hold working medium when heat pipe 3 works.When the sun set, the evaporation of the condensate water of heat pipe 3 cold junction inner surfaces comprised that the whole or most working medium of all working medium of this part working medium are by annular fillet capillary wick 4 stickings.
4 pairs of annular fillet capillary wick among Fig. 1 embodiment according to the time thermal-collecting tube the state no requirement (NR), convenient on-the-spot installation and maintenance operation.
Fig. 2 provides second embodiment of the present utility model.
Among Fig. 2, be connected by two Thermal Conduction Equipment 7 low thermal resistances with the insertion type glass housing heat pipe 3 that inserts wherein with an all-glass vacuum thermal-collecting tube 6, make a sparse core net and accelerate the heat collecting element that the insertion type glass heat pipe starts.All-glass vacuum thermal-collecting tube 6 is made by cover glass tube 1 and the sealing-in of inner glass tube 2 nested, concentric layout.In inside, heat pipe 3 hot junction 10 annular fillet capillary wick 4 according to circumferential layout are set and form a sparse core net.
Fig. 2 embodiment heat pipe 3 internal structures and operation principle are similar to Fig. 1 embodiment's.
Fig. 3 provides the 3rd embodiment of the present utility model.
Among Fig. 3, in an eccentric all-glass vacuum thermal-collecting tube 8, insert an insertion type glass housing heat pipe 3, make a sparse core net and accelerate the eccentric heat collecting element that the insertion type glass heat pipe starts.Inner glass tube 2 relative cover glass tube 1 arranged off-centre of eccentric all-glass vacuum thermal-collecting tube 8 and inner glass tube 2 are connected with semicircle minute surface 9 optically focused on being made in cover glass tube 1.In inside, heat pipe 3 hot junction 10 annular fillet capillary wick 4 according to circumferential layout are set and form a sparse core net.
Fig. 3 embodiment heat pipe 3 internal structures and operation principle are similar to Fig. 1 embodiment's.
Claims (2)
1. sparse core net accelerates the heat collecting element that glass heat pipe starts, made by cover glass tube and the sealing-in of inner glass tube nested, concentric layout, inner glass tube from sealing-in place stretch out and inner vacuum pumping loading working medium after sealed-off make a heat pipe, the outer surface of inner glass tube is made absorbing film, it is characterized in that containing a sparse core net that is comprised of the slice capillary wick of 2 to 10 millimeters of some width in inside, heat pipe hot junction, sparse core net adopts elastic circlip to overlay in heat pipe hot junction inwall; The area of sparse core net is less than 5% of described heat pipe hot junction inner wall area.
2. according to heat collecting element claimed in claim 1, it is characterized in that the relative cover glass tube arranged off-centre of described inner glass tube, described inner glass tube is connected with semicircle minute surface optically focused on being made in cover glass tube; Perhaps described inner glass tube is connected with an additional semicircle minute surface optically focused that is connected on cover glass tube.
3. sparse core net accelerates the heat collecting element that glass heat pipe starts, by an all-glass vacuum thermal-collecting tube with insert wherein insertion type glass heat pipe and cooperate or conduct heat to be connected and make, all-glass vacuum thermal-collecting tube is made by cover glass tube and the sealing-in of inner glass tube nested, concentric layout, it is characterized in that containing a sparse core net that is comprised of the slice capillary wick of 2 to 10 millimeters of some width in inside, insertion type glass heat pipe hot junction, sparse core net adopts elastic circlip to overlay in heat pipe hot junction inwall; The area of sparse core net is less than 5% of described heat pipe hot junction inner wall area.
4. according to claim 1 or 3 described heat collecting elements, it is characterized in that described sparse core net is formed by several annular fillet capillary wick according to circumferential layout.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013202087655U CN203240811U (en) | 2013-04-22 | 2013-04-22 | Heat collection element for accelerating start of glass heat tube through sparse core net |
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| CN2013202087655U CN203240811U (en) | 2013-04-22 | 2013-04-22 | Heat collection element for accelerating start of glass heat tube through sparse core net |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103225923A (en) * | 2013-04-22 | 2013-07-31 | 海宁伊满阁太阳能科技有限公司 | Heat collection element for accelerating start-up of glass heat pipe through sparse core net |
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2013
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103225923A (en) * | 2013-04-22 | 2013-07-31 | 海宁伊满阁太阳能科技有限公司 | Heat collection element for accelerating start-up of glass heat pipe through sparse core net |
| CN103225923B (en) * | 2013-04-22 | 2015-05-27 | 方彩琴 | Heat collection element for accelerating start-up of glass heat pipe through sparse core net |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131016 Termination date: 20140422 |