CN203216130U - Short wick working fluid high-level accumulation eccentric straight heat pipe vacuum heat collection element - Google Patents
Short wick working fluid high-level accumulation eccentric straight heat pipe vacuum heat collection element Download PDFInfo
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- CN203216130U CN203216130U CN 201320240385 CN201320240385U CN203216130U CN 203216130 U CN203216130 U CN 203216130U CN 201320240385 CN201320240385 CN 201320240385 CN 201320240385 U CN201320240385 U CN 201320240385U CN 203216130 U CN203216130 U CN 203216130U
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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
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Abstract
The utility model relates to a short wick working fluid high-level accumulation eccentric straight heat pipe vacuum heat collection element. The short wick working fluid high-level accumulation eccentric straight heat pipe vacuum heat collection element comprises an eccentric all-glass vacuum heat collection pipe and an insertion type glass heat pipe inserted into an inner cavity of an eccentric inner glass pipe of the eccentric all-glass vacuum heat collection pipe, the eccentric all-glass vacuum heat collection pipe and the insertion type glass heat pipe inserted into the inner cavity of the eccentric inner glass pipe of the eccentric all-glass vacuum heat collection pipe are matched or connected in a low heat resistance way, the insertion type glass heat pipe is obliquely arranged and works by relying on gravity, an absorption film is contained in the outer surface of the eccentric inner glass pipe, namely the glass heat pipe, and the short wick working fluid high-level accumulation eccentric straight heat pipe vacuum heat collection element is characterized in that a short wick working fluid suction holding and intercepting device is contained in the heat end of the heat pipe, the eccentric inner glass pipe of the eccentric all-glass vacuum heat collection pipe is eccentrically arranged relative to a cover glass pipe, and the eccentric inner glass pipe is in light-gathering connection with a semi-circular mirror surface on the cover glass pipe, or the eccentric inner glass pipe is in light-gathering connection with an additional semi-circular mirror surface matched and connected on the cover glass pipe. The short wick working fluid high-level accumulation eccentric straight heat pipe vacuum heat collection element disclosed by the utility model can accelerate the start of the heat pipe to the greatest extent, and also keep the internal pressure of the glass heat pipe at low level during air drying.
Description
Technical field
The utility model relates to a short tube imbibition core working medium high position and gathers eccentric directly-heated pipe vacuum heat collection element.
Background technology
Vacuum heat collection element arranges a vacuum heat-insulating layer between its cover glass tube and inner glass tube, can make the vacuum solar water heater that also can provide the domestic hot-water winter.With the solar water heater of heat-pipe vacuum heat collecting pipe manufacturing have more anhydrous Energy Efficiency Ratio height in the pipe, meet the safe drinking water standard, single tube damages advantage such as in the same old way work.Therefore.Anhydrous solar energy evacuated heat pipe water heater 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 the heat pipe inwall adopts light-pipe structure, heat-pipe vacuum heat collecting pipe about 45 degree that tilt to install.Under non-heat exchange state, can observe the heat pipe bottom has liquid refrigerant to gather.
To its carry out and pipe in the all-glass vacuum thermal-collecting tube solar water heater check experiment of water, slow back is fast earlier to find the intensification situation of heat pipe solar energy water heater.Judgement is that the heat pipe start-up course is long, the startup stage of heat pipe, the heat collector tube element can not full power operation thereby heat up slow, the operation of heat collector tube element full power thereby quick heating after heat pipe starts.
The heat pipe of investigating all-glass heat pipe vacuum collector tube starts: because the working medium that is collected in the heat pipe bottom makes these liquid refrigerants can not participate in the two phase flow heat transfer circulation rapidly usually because its temperature of minute surface shading that is formed by getter rises slowly.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 in a very long time.Rely on the glass heat pipe tube wall heat transfer near the bottom to make liquid refrigerant vaporization and circulation participate in two phase flow heat transfer gradually later on, 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 makes 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 bigger capillary lift.
Employing arranges to have enough large-area core nets at the glass heat pipe inner surface, though can utilize capillarity to solve the long problem of heat pipe start-up course, but can make the bigger increase of cost, more seriously also can fill more, the too high increase greatly that has a big risk that causes the bombing accident of vapour pressure when making empty solarization of working medium because of inside.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 about 10 atmospheric pressure of 180 ℃ from about 3.7 atmospheric pressure of 140 ℃, but inside heat pipe when continuing to be warming up to 180 ℃ from 140 ℃ of about 3.7 atmospheric high-vapor-pressures internal pressure only have about 4 atmospheric pressure.Because the glass voltage endurance capability is limited, so the liquid refrigerant position height in the time of should managing to raise heat pipe and start is accelerated to start, the least possiblely when heat pipe work again hold back liquid refrigerant with minimizing working medium filling weight.
China's utility model 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 utility model patent 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 empty the solarization internal pressure or start still slower problem.Suppose: set originally and be limited to 4 atmospheric pressure on 44 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 heat collector tube pipe, emptyly shine 230 ℃ of maximum temperatures, water is made working medium, calculating can get about 3 liters of inner glass tube volume.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 shining 230 ℃ of temperature in high-altitude, 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 1.5 milliliters of working medium have altogether been arranged when the heat pipe operate as normal, 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 that part of 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 of the highest saturated vapor pressure correspondence at this moment rises to 145 ℃ from 135 ℃; Correspondingly, when shining 230 ℃ of temperature in high-altitude, 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, shine under the temperature in high-altitude, the thermal-collecting tube pressure inside can surpass original pressure of setting and increase to 5 atmospheric pressure from 4 atmospheric pressure 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 a short tube imbibition core working medium high position to gather eccentric directly-heated pipe vacuum heat collection element.
The technical scheme in the invention for solving the technical problem: make a short tube imbibition core working medium high position and gather eccentric directly-heated pipe vacuum heat collection element, comprise eccentric all-glass vacuum thermal-collecting tube and the plug-in type glass heat pipe that inserts its eccentric inner glass tube inner chamber.Eccentric all-glass vacuum thermal-collecting tube cooperates with the plug-in type glass heat pipe that inserts its eccentric inner glass tube inner chamber or low thermal resistance is connected.The plug-in type glass heat pipe is in tilted layout and relies on gravity work, and eccentric inner glass tube is that the outer surface of glass heat pipe contains absorbing film.Short tube imbibition core working medium sticking interception device is contained in inside, described heat pipe hot junction, and short tube imbibition core is along the circumferential layout of heat pipe inwall; Short tube imbibition core from the spacing distance of heat pipe bottom less than 20% of heat pipe hot junction total length.The relative cover glass tube arranged off-centre of the eccentric inner glass tube of described eccentric all-glass vacuum thermal-collecting tube and eccentric inner glass tube be connected with semicircle minute surface optically focused on being made in cover glass tube or, eccentric inner glass tube is connected in the additional semicircle minute surface optically focused that connects on the cover glass tube with a cooperation and is connected.
Can also make 40 ± 5 ℃ of the water temperatures in 700 ± 50 watts/square metre of sunshine exposures, the 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 90 ± 20 ° of scopes under the condition: lack an imbibition core hold liquid refrigerant quality≤its maximum liquid refrigerant volume of holding 25%.
Can also make: the maximum liquid refrigerant volume of holding of short tube imbibition core 〉=4 milliliters; 40 ± 5 ℃ of the water temperatures in 700 ± 50 watts/square metre of sunshine exposures, the 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 90 ± 20 ° of scopes under the condition, lack quality≤0.9 milliliter that an imbibition core is held liquid refrigerant.
The beneficial effects of the utility model: the short tube of a utility model imbibition core working medium high position is gathered eccentric directly-heated pipe vacuum heat collection element, short tube imbibition core is set in described heat collecting element glass heat pipe inside, when the sun sets, the reverse work of described 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, thereby gathers more and downward trickling arrives when lacking a tin imbibition core and held back the position of having raised working medium by sticking when former heat pipe hot junction inner surface liquid refrigerant.When the sun came out in second day, in a single day the heat pipe hot junction was heated, and the liquid refrigerant that is cut liquid by sticking evaporates rapidly and the participation two phase flow heat transfer.Further analyze as can be known: owing to adopted short tube imbibition core, tenfold has increased endotherm area, compare the heating power of working medium startup stage of having increased considerably with the light pipe glass heat pipe that only relies on glass tube walls to draw heat energy from the glass tube top that is surrounded by the getter minute surface.In winter, the heat pipe start-up course foreshortens to 10 to 30 minutes from more than 140 minute of original light pipe, is equivalent to heat collector many thermal-arrests every day in winter more than one hour.Daytime is during the heat collecting element operate as normal, because a short tube imbibition core has only 45 millimeters from bottom, heat pipe hot junction, even these 45 millimeters sections are dry, the solar thermal energy that relevant absorbing film absorbs also can conduct heat by glass tube effectively participate in heat exchange.Increase because using working medium sticking interception device with regard to not existing like this or more increase the problem of working medium filling weight, thereby both having accelerated heat pipe to greatest extent starts; The glass heat pipe pressure inside keeps low level when making empty the solarization again.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is that a short tube imbibition core working medium high position is gathered eccentric directly-heated pipe vacuum heat collection element structural representation.
1. cover glass tubes among the figure; 2. eccentric inner glass tube; 3. heat pipe; 4. lack tube imbibition core; 5. elastic circlip; 10. eccentric directly-heated pipe vacuum heat collection pipe; 11. semicircle minute surface.
The specific embodiment
Fig. 1 provides embodiment of the utility model.
Among Fig. 1, eccentric all-glass vacuum thermal-collecting tube 10 is connected with plug-in type glass shell body heat pipe 3 low thermal resistances that insert its eccentric inner glass tube 2 inner chambers, makes a short tube imbibition core working medium high position and gathers eccentric directly-heated pipe vacuum heat collection element.The length in heat pipe 3 hot junctions is 1.8 meters.The outer surface that eccentric inner glass tube 2 is heat pipe 3 is made absorbing film.Vertical or the installation of tilting of described heat collecting element.Heat pipe 3 relies on gravity work.Inside, heat pipe 3 hot junction arranges short tube imbibition core 4,60 millimeters of short tube imbibition core 4 length; Short tube imbibition core 4 usefulness elastic circlips 5 overlay in heat pipe 3 hot junction inwalls.Short tube imbibition core 4 is along the circumferential layout of heat pipe 3 inwalls; Short tube imbibition core 4 is 30 to 60 millimeters from the spacing distance of heat pipe 3 bottoms.Eccentric inner glass tube 2 relative cover glass tube 1 arranged off-centre and the eccentric inner glass tube 2 of eccentric all-glass vacuum thermal-collecting tube 10 are connected with semicircle minute surface 11 optically focused that are made in cover glass tube 1 inwall.Side by side outside arrow is represented the cold junction position of heat pipe 3 among Fig. 1.
Optically focused connect refer to the eccentric inner glass tube 2 of absorbing film mobile near semicircle minute surface 11 but do not contact in order to avoid form heat bridge with semicircle minute surface 11 and cause heat-energy losses from the top down along the symmetrical plane of semicircle minute surface 11 with its axial line.From Fig. 1 as seen: enter the sunlight of cover glass tube 1, mid portion directly changes into heat energy at the absorbing film of eccentric inner glass tube 2; The overwhelming majority in the two side portions arrives on the absorbing film through the reflection of semicircle minute surface 11 once or repeatedly and changes into heat energy.The sunlight that passes from the gap between eccentric inner glass tube 2 and the cover glass tube 1 might pass cover glass tube 1 through the reflection of semicircle minute surface 11 and escape.Gap width between eccentric inner glass tube 2 and the cover glass tube 1 is about 2 millimeters.
When the heat collecting element of Fig. 1 embodiment turns clockwise about 45 degree when tilting to install, 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 tube imbibition 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 empty the solarization.
When the heat collecting element of Fig. 1 embodiment turns clockwise about 45 degree when tilting to install, short tube imbibition core 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.When short tube imbibition core 4 starts in order to heat pipe 3 from 40 millimeters of heat pipe 3 bottom spacing distances from top and below absorb solar thermal energy simultaneously and accelerate startup.
Among Fig. 1 embodiment, so allow during heat pipe 3 operate as normal below it dry or dry short tube imbibition core 4 of part of tens of millimeters sections when heat pipe 3 work, usually not hold working medium.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 lacked imbibition core 4 sticking.
Claims (3)
1. a short tube imbibition core working medium high position is gathered eccentric directly-heated pipe vacuum heat collection element, comprise eccentric all-glass vacuum thermal-collecting tube and the plug-in type glass heat pipe that inserts its eccentric inner glass tube inner chamber, eccentric all-glass vacuum thermal-collecting tube cooperates with the plug-in type glass heat pipe that inserts its eccentric inner glass tube inner chamber or low thermal resistance is connected, the plug-in type glass heat pipe is in tilted layout and relies on gravity work, the outer surface that eccentric inner glass tube is glass heat pipe contains absorbing film, it is characterized in that inside, described heat pipe hot junction contains short tube imbibition core working medium sticking interception device, short tube imbibition core is along the circumferential layout of heat pipe inwall; Short tube imbibition core from the spacing distance of heat pipe bottom less than 20% of heat pipe hot junction total length; The relative cover glass tube arranged off-centre of the eccentric inner glass tube of described eccentric all-glass vacuum thermal-collecting tube and eccentric inner glass tube be connected with semicircle minute surface optically focused on being made in cover glass tube or, eccentric inner glass tube is connected in the additional semicircle minute surface optically focused that connects on the cover glass tube with a cooperation and is connected.
2. according to the described heat collecting element of claim 1, it is characterized in that 700 ± 50 watts/square metre of sunshine exposures, 40 ± 5 ℃ of the water temperatures in the 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 90 ± 20 ° of scopes under the condition: lack an imbibition core hold liquid refrigerant quality≤its maximum liquid refrigerant volume of holding 25%.
3. according to claim 1 or 2 described heat collecting elements, it is characterized in that: the maximum liquid refrigerant volume of holding of short tube imbibition core 〉=4 milliliters; 40 ± 5 ℃ of the water temperatures in 700 ± 50 watts/square metre of sunshine exposures, the 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 90 ± 20 ° of scopes under the condition, lack quality≤0.9 milliliter that an imbibition core is held liquid refrigerant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320240385 CN203216130U (en) | 2013-05-04 | 2013-05-04 | Short wick working fluid high-level accumulation eccentric straight heat pipe vacuum heat collection element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320240385 CN203216130U (en) | 2013-05-04 | 2013-05-04 | Short wick working fluid high-level accumulation eccentric straight heat pipe vacuum heat collection element |
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| Publication Number | Publication Date |
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| CN203216130U true CN203216130U (en) | 2013-09-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320240385 Expired - Fee Related CN203216130U (en) | 2013-05-04 | 2013-05-04 | Short wick working fluid high-level accumulation eccentric straight heat pipe vacuum heat collection element |
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| CN (1) | CN203216130U (en) |
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2013
- 2013-05-04 CN CN 201320240385 patent/CN203216130U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20130925 Termination date: 20140504 |