CN104976801A - Heat collecting plate core and flat-plate type solar thermal collector - Google Patents
Heat collecting plate core and flat-plate type solar thermal collector Download PDFInfo
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/20—Solar thermal
-
- 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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/20—Climate change mitigation technologies for sector-wide applications using renewable energy
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Abstract
The invention discloses a heat collecting plate core and a flat-plate type solar thermal collector. The flat-plate type solar thermal collector is characterized by comprising the heat collecting plate core based on a corrugated metal sheet structure, a superconductive hybrid heat transfer working medium, a transparent cover plate, a heat insulating material layer and an outer frame. The flat-plate type solar thermal collector has the characteristics of being compact in structure, high in heat transfer efficiency, small in pressure loss, light in weight, flexible to install, high in pressure bearing performance, resistant to freezing, scaling and corrosion, long in service life, low in cost and the like, and is very suitable for being combined with buildings. The superconductive hybrid heating medium serves as the heat transfer working medium, so that the solar thermal collector still operates normally at low temperature; the heat utilization efficiency is greatly improved; the use range is greatly enlarged; the application ways of the flat-plate type solar thermal collector are widened; the flat-plate type solar thermal collector is widely suitable for solar thermal collection occasions like civil buildings and industrial plants.
Description
Technical field
The invention belongs to the solar energy heating technical field of middle low temperature, particularly relate to heat-absorbing plate core and flat-plate solar heat collector sun energy heat collector.
Background technology
Flat-plate solar heat collector has been widely used in the numerous areas such as domestic water heating, natatorium heating system, water for industrial use heating, constructure heating and air-conditioning.Flat-plate solar heat collector is primarily of a few part composition such as transparent cover plate, heat-absorbing plate core, thermal insulation layer and casing frame, and wherein plate heat-absorbing plate core is the core component of solar thermal utilization.
When flat-plate solar heat collector works, solar radiation, through after transparent cover plate, is incident upon on heat-absorbing plate core, absorbed by heat-absorbing plate core and convert heat energy to, then transfer heat to the heat-transfer working medium in heat-absorbing plate core, the temperature of heat-transfer working medium is raised, and the effective energy as heat collector exports.
Heat-absorbing plate core absorbs solar radiant energy in flat-plate solar heat collector and to the parts of heat-transfer working medium transferring heat, it is writing board shape substantially.For increasing the hot property of absorber plate, often at heat-absorbing plate core surface spary heat absorbing coating.On the absorber plate of writing board shape, be usually all furnished with comb and collector.Comb refers to absorber plate longitudinal arrangement and forms the parts of fluid passage; Collector refers to absorber plate upper and lower two ends lateral connection some combs and forms the parts of fluid passage.The material category of heat-absorbing plate core is a lot, has copper, aluminium alloy, Copper-Aluminum compound, stainless steel, galvanized steel, plastics, rubber etc.Heat-absorbing plate core primary structure form and respective pluses and minuses thereof are described below:
(1) tube-sheet type heat-absorbing plate core is that comb is connected and composed heat absorption band with dull and stereotyped with certain combination, and then is welded into absorber plate with upper lower collector pipe.This uses commonplace absorber plate structure type both at home and abroad at present.Comb due to this plate core is circular, and it is a line with the contact of absorber plate, and therefore little, the thermal contact resistance of contact surface greatly, and heat transfer efficiency is low.
(2) wing pipe type heat-absorbing plate core is utilize mould extrusion stretching technique to make heat absorption band that metal tube both sides are connected with fin, and then is welded into absorber plate with upper lower collector pipe.Absorber plate material generally adopts aluminium alloy.The advantage of wing pipe type heat-absorbing plate core: the thermal efficiency is high, pipe and flat board are one, and nothing is in conjunction with thermal resistance, and voltage endurance capability is strong.Shortcoming is complex process, and material usage is large, and technological requirement tube wall and fin have larger thickness to increase fin thermal conductivity factor, poor dynamic, and heat-absorbing plate core has larger thermal capacity, self temperature rise large.
(3) flat box type heat-absorbing plate core is by the compression molding respectively of two pieces of metallic plates, and then integrally welded formation absorber plate, and absorber plate material can adopt stainless steel, aluminium alloy, galvanized steel etc.Usually, adopt spot-welding technology between fluid passage, absorber plate surrounding adopts roll welding technique.The advantage of flat box type absorber plate: the thermal efficiency is high, pipe and flat board are one, and nothing is in conjunction with thermal resistance; Do not need to weld collector, fluid passage and collector adopt once molding formed.Shortcoming: welding procedure difficulty is large, easily occurs welding and penetrates or the problem of not prison welding; Poor voltage withstand capability, solder joint can not bear higher pressure; Poor dynamic, the cross section of fluid passage is large, and absorber plate has larger thermal capacity, self temperature rise large.
(4) coil pipe type heat-absorbing plate core is bent to by metal tube snakelike, and then forms heat-absorbing plate core with plate welding.Absorber plate material generally adopts copper, and welding procedure can adopt high-frequency welding or ultra-sonic welded.The advantage of coil pipe type absorber plate: do not need to weld collector in addition, reduces the possibility of leaking; Corrosion-resistant, voltage endurance capability is strong.Shortcoming: thermal contact resistance is large, and fin heat transfer efficiency is low; Plate core is even along Working fluid flow direction temperature distributing disproportionation; Series connection flow passage resistance is large, flowing crushing is large; Curved welding seam technology difficulty is large.
Plate type solar heat-collecting plate core adopts water or acetone etc. as heat-transfer working medium usually, its easily freeze and at low temperatures operational efficiency difference etc. problem long-term existence in solar water heater industry, this technological deficiency hampers the winter of flat-plate solar heat collector in Temperate Region in China and the use of part severe cold area always, therefore research and develop a kind of simple and compact for structure, heat transfer efficiency is high, crushing is little, the heat-absorbing plate core of cold operation superior performance and flat-plate solar heat collector imperative.
Summary of the invention
The technical problem to be solved in the present invention be to provide a kind of simple and compact for structure, heat transfer efficiency is high, crushing is little, the ultra-thin superconductive type heat-absorbing plate core of cold operation superior performance.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
Heat-absorbing plate core, its innovative point is: described heat-absorbing plate core is that the sheet metal be arranged in parallel by two panels is consisted of hermetically sealed welding, there is a heat transferring medium turbulent flow passageway, and there is the sender property outlet that at least one working medium import be communicated with heat transferring medium runner is communicated with heat transferring medium runner with at least one; The sheet metal that described two panels be arranged in parallel comprises the smooth metallic thin plate of upper end and the corrugated sheet metal of lower end; Described smooth metallic thin sheet surface is coated with composite solar heat absorbing coating, and the punch forming of described corrugated sheet metal inner surface has water conservancy diversion projection or convex tendon.
In some embodiments, described corrugated sheet metal is bubble type ripple, and the punch forming of described corrugated sheet metal medial surface has the equally distributed spherical guide protrusions of some rows, and the spherical guide protrusions of adjacent two rows stagger setting.
Further, the guide protrusions of described corrugated sheet metal is spheroid, cylinder, circular cone, polyhedron, cuboid.
Further, the spread geometry of described corrugated sheet metal guide protrusions is parallelogram, rectangle, circle, ellipse, triangle, trapezoidal, rhombus.
In some embodiments, described corrugated sheet metal is vertical bar shaped ripple, the medial surface punch forming of corrugated sheet metal has some vertical bar shaped water conservancy diversion convex tendons arranged in parallel, and water conservancy diversion convex tendon is arranged to tapping side from liquid feeding side, the setting and the runner mouth of described adjacent two row's water conservancy diversion convex tendons staggers.
In some embodiments, described corrugated sheet metal is herringbone ripple, the medial surface of corrugated sheet metal has some herringbone water conservancy diversion convex tendons arranged in parallel from punch forming, and water conservancy diversion convex tendon liquid feeding side is to tapping side, and the runner mouth of described adjacent row's water conservancy diversion convex tendon staggers setting.
Another object of the present invention is to provide a kind of flat-plate solar heat collector of ultra-thin superconductive type, and its innovative point is: comprise transparent cover plate, heat-absorbing plate core, heat-insulation layer, superconduction contact heat transfer working medium and housing; Described transparent cover plate, heat absorbing core plate and heat-insulation layer be arranged in parallel from top to bottom successively.
Ultrawhite low iron safety glass or the ultrawhite low iron woven design safety glass of transparent cover plate material to be thickness be 3 ~ 5mm.Generally, adopt single-layer and transparent cover plate in south China area, in the northern area of China, Double-layered transparent cover plate should be adopted.Distance between transparent cover plate and heat-absorbing plate core should be greater than 20mm to obtain optimum air heat transfer free convection in dull and stereotyped interlayer.Insulation material can adopt phenol formaldehyde foam, rock wool, mineral wool, polyurethane, polystyrene etc.The thickness of thermal insulation layer should according to weather conditions of the operating temperature of the material category selected, heat collector, territory of use etc. because usually determining.The thermal conductivity factor of material is larger, the operating temperature of heat collector is higher, temperature that is territory of use is lower, and the thickness of thermal insulation layer just requires larger.In general, the thickness of bottom thermal insulation layer selects 30 ~ 50mm, and the thickness of side thermal insulation layer is roughly the same with it.The material of shell has aluminium alloy, corrosion resistant plate, carbon steel sheet, plastics, fiberglass etc.In order to improve the sealing of shell further, the aluminium alloy of 0.4 ~ 0.8mm or the once molding formed technique of carbon steel sheet can be adopted.Flat-plate solar collector general thickness is minimum is about 55mm, and more thinning than classic flat-plate solar thermal collector nearly 30%.
Preferably, the smooth metallic plate of described heat-absorbing plate core is towards transparent cover plate, and wavy metal plate is affixed to heat-insulation layer.
Further, the flat-plate solar heat collector of ultra-thin superconductive type also comprises one for installing the metal outer frame of transparent cover plate, heat-absorbing plate core and heat-insulation layer, described metal outer frame is made up of the back of the body frame of side frame and side frame bottom, transparent cover plate is fixed in the side frame top of metal outer frame, and and leave air heat insulating layer between heat-absorbing plate core, the side frame of described metal outer frame and back of the body frame can monolithic moldings, also can adopt split type, are connected and fixed by bolt or buckle.
Further, described flat-plate solar heat collector is in series or in parallel to form heat exchange array successively by connecting tube.
Further, the main component of described superconduction contact heat transfer working medium is 1, ammediol, water and a small amount of anticorrisive agent, the each main component of described heat-transfer working medium need mix in the ratio of 5: 4.4: 0.5, described heat-transfer working medium is applicable to middle low-temperature solar energy heat collector, temperature range of operation is-30 DEG C to 105 DEG C, and operating temperature can the mixed proportion different according to main component adjust.
Further, the composition of described heat-transfer working medium also can be the mixture of methyl alcohol or ethylene glycol or acetone and water and anticorrisive agent.
Beneficial effect of the present invention:
(1) the parallel overlap of corrugated sheet metal that ultra-thin superconductive type heat-absorbing plate core has irregular corrugated surface by a slice smooth metallic thin plate and a slice forms, the turbulent flow passageway of unequal section is formed between plate, directly exchange heat is carried out by the heat transfer of runner and the coating surface of heat-absorbing plate core, reduce heat exchange thermal resistance, increase overall heat exchange efficiency.Heat-absorbing plate core, from tool comb and collector function, automatic uniform distribution working medium can carry out heat exchange, reduce material usage and plate core weight, and completely eliminate the impact of thermal contact resistance.Heat-absorbing plate core is hermetically sealed to be welded, and load performance is high.Plate in-core many places parallel fluid flow resistance is little, and crushing is little.Under uniform pressure damaed cordition, its ratio of heat transfer coefficient tube-sheet type heat collection structure exceeds 3-5 doubly, and heat recovery rate can up to more than 90%.
(2) the thin plate punching such as stainless steel, aluminium alloy, copper that corrugated cardboard sheet is 0.5 ~ 3mm by thickness usually forms, and can customize specification arbitrarily.Its coefficient of heat transfer is high, crushing is little, high pressure-bearing, corrosion-resistant, and production technology is simple, and standard production degree is high, with low cost.By using various multi-form grinding tool sheet metal can be pressed into different ripple, and on two angles of corrugated cardboard sheet, have four corner apertures, as the import and export passage of working media.The corrugated form of sheet metal mainly contains herringbone ripple, vertical bar ripple, anyhow ripple, trapezoidal straight ripple, indentation ripple and bubbling type etc.These corrugated design constitute complicated runner, make working media flowing in rotated three dimensional in runner between corrugated plating, can produce turbulent flow, so the heat transfer coefficient of this heat collection structure is higher under lower Reynolds number.Two thin plate sheets adopt full welding procedure sealing technology to be welded (as argon arc welding), and do not adopt any nonmetal encapsulant, thus have higher heatproof, withstand voltage properties, operating temperature applicatory and pressure limit are widely.In addition because thin plate all adopts metal stamping to process, standardized production degree is high, the about low 40%-60% of cost ratio tube-sheet type of large-scale production.
(3) the antifreeze ability of heat-transfer working medium is strong, even if easily occurring that the cold district of frost (-30 DEG C) all normally runs.Heat-transfer working medium specific heat capacity is large, exchange capability of heat strong, even if in-20 DEG C of situations, specific heat capacity still has 3.02-3.62kJ/kg-K; When 100 DEG C, specific heat capacity is up to 3.41-3.81kJ/kg-K.Heat-transfer working medium corrosion protection is strong, and board core material material selectable range is extensive.Heat-transfer working medium good antiscale property ability is strong, to board core material material almost without any chemical reaction, does not produce the suspended impurity blocking pipelines such as greasy filth.Heat-transfer working medium has low degradability feature, and anti-air drying ability is strong, increases the service life of heat collector.Heat-transfer working medium main component 1,3-PD can refine by the agriculture plant produced fast, as being that the recyclable organism of raw material transforms production technology with corn, breaking away from the dependence to conventional fossil fuel, reducing the negative effect to environment.
(4) insulation material can reduce metal foil plate type heat exchanger to surrounding environment dissipated heat, to improve the collecting efficiency of assembly.Insulation material need thermal conductivity factor little, do not absorb water, have the features such as certain hardness, thickness is generally 3-5 centimetre.Conventional insulation material has polystyrene, polyurethane etc.Insulation material can carry out perforate by the import and export caliber different according to working media.
(5) flat-plate solar heat collector has compact conformation, heat transfer efficiency is high, crushing is little, weight is light and handy, flexible for installation, pressure-bearing property is high, freeze proof, good antiscale property, corrosion-resistant, the feature such as long service life and low cost.By adopting mixing superconduction heating agent as heat-transfer working medium, flat-plate solar heat collector still normally runs at low temperatures, greatly improves the thermal efficiency and the scope of application of heat collector.In addition no matter from aspects such as monnolithic case, weight, thickness and structural strengths, this flat-plate solar heat collector is all more suitable for combining with building, has widened its application approach, is widely used in the solar energy heating such as civil buildings and industrial premises occasion.
Accompanying drawing explanation
Fig. 1 is the front schematic view of the ultra-thin superconductive type heat-absorbing plate core of the present invention.
The schematic rear view of the ultra-thin superconductive type heat-absorbing plate core of Fig. 2 the present invention.
Fig. 3 is the three-dimensional assembly drawing of the ultra-thin heat-absorbing plate core of the present invention.
Fig. 4 is the schematic rear view of the staggered heat-absorbing plate core of raised corrugations.
Fig. 5 is the schematic rear view that raised corrugations arranges the heat-absorbing plate core be rectangle.
Fig. 6 is the schematic rear view of the heat-absorbing plate core of raised corrugations arrangement parallelogram.
Fig. 7 is the schematic rear view of the heat-absorbing plate core of raised corrugations arrangement ovalize.
The schematic three dimensional views of Fig. 8 to be raised corrugations be heat-absorbing plate core of spheroid.
The schematic three dimensional views of Fig. 9 to be raised corrugations be heat-absorbing plate core of the different spheroid of size.
The schematic three dimensional views of Figure 10 to be raised corrugations be cylindrical heat-absorbing plate core.
The schematic three dimensional views of Figure 11 to be raised corrugations be heat-absorbing plate core of square.
The schematic three dimensional views of Figure 12 to be raised corrugations be heat-absorbing plate core of cone.
The schematic three dimensional views of Figure 13 to be raised corrugations be polyhedral heat-absorbing plate core.
The section plan of Figure 14 to be raised corrugations be heat-absorbing plate core of spheroid.
The section plan of Figure 15 to be raised corrugations be cylindrical heat-absorbing plate core.
The section plan of Figure 16 to be raised corrugations be heat-absorbing plate core of square.
The section plan of Figure 17 to be raised corrugations be heat-absorbing plate core of cone.
The section plan of Figure 18 to be raised corrugations be polyhedral heat-absorbing plate core.
The section plan of Figure 19 to be convex tendon ripple be heat-absorbing plate core of vertical bar: vertical parallel runner.
The metal foil plate type heat exchanger plane of Figure 20 to be a kind of convex tendon ripple be vertical bar: vertical tortuous flow path
The metal foil plate type heat exchanger plane of Figure 21 to be a kind of convex tendon ripple be vertical bar: horizontal tortuous flow path
The metal foil plate type heat exchanger plane of Figure 22 to be a kind of convex tendon ripple be herringbone vertical bar: herringbone runner
Figure 23 is flat-plate solar heat collector front view.
Figure 24 is flat-plate solar heat collector side view.
Figure 25 is flat-plate solar heat collector dorsal view
Figure 26 is flat-plate solar heat collector top view.
Figure 27 is flat-plate solar heat collector three-dimensional assembling schematic diagram.
Figure 28 is flat-plate solar heat collector assembling parts schematic diagram.
Figure 29 is flat-plate solar heat collector connecting mode schematic diagram.
Figure 30 is another connecting mode schematic diagram of flat-plate solar heat collector.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, technical scheme of the present invention is elaborated.
Consult Fig. 1-17, heat-absorbing plate core 7 of the present invention, be arranged in parallel by smooth metallic thin plate 10 and corrugated sheet metal 9, smooth metallic thin plate 10 outer surface is coated with composite solar heat absorbing coating 11, and the punch forming of corrugated sheet metal 9 inner surface goes out water conservancy diversion projection or convex tendon 12.For turbulent flow can be produced under lower Reynolds number, improve the heat exchange efficiency of heat exchanger core 7, in the two panels sheet metal of its planar metal plate body, a slice is non-ripple planar sheet 10, and another sheet is the corrugated foils 9 going out water conservancy diversion projection or convex tendon 12 in inner surface punch forming.
Metal foil in the present invention board-like heat exchanger core 7 entirety does not adopt any nonmetal encapsulant; The thin plate punching such as stainless steel, aluminium, titanium, molybdenum that corrugated cardboard sheet is 0.5 ~ 3mm by thickness forms, and can customize arbitrarily physical dimension according to demand, and by using multi-form grinding tool to be pressed into different ripple.
Smooth metallic thin plate 10 and corrugated sheet metal 9 are consisted of hermetically sealed welding, there is multiple heat transferring medium turbulent flow passageway 13, and there is the sender property outlet 5 that at least one working medium import 8 be communicated with heat transferring medium runner is communicated with heat transferring medium runner with at least one.Corrugated sheet metal 9 has guide protrusions ripple 12, and its spread geometry can be that parallelogram, rectangle, circle, ellipse, triangle, trapezoidal, rhombus and other irregular alignments are arranged.The guide protrusions ripple 12 of corrugated sheet metal 9 is by inner plate surfaces punch forming, and convex shape can be spheroid, cylinder, circular cone, polyhedron, cuboid and other random geometry bodies.Plate in-core heat transferring medium turbulent flow passageway 13 also has Mutiple Choice according to the shape of projection and difference arranged evenly.
This technical staff should understand, and the lines of corrugated foils 9 is only schematic here, is not circumscribed.As shown in Figure 18 ~ 20, the lines that corrugated foils is also can be vertical bar shaped ripple, be specially: the medial surface of corrugated foils 9 has some vertical bar shaped water conservancy diversion convex tendons 15 arranged in parallel from liquid feeding side to tapping side punch forming, and the runner mouth of adjacent row's water conservancy diversion convex tendon or be arranged in parallel or setting of staggering, vertical bar shaped water conservancy diversion convex tendon here can be parallel or vertically arrange according to installation requirements.This corrugated foils 9 with perpendicular or parallel vertical bar shaped water conservancy diversion convex tendon welds rear formation heat transferring medium turbulent flow passageway 14 or heat transferring medium turbulent flow passageway 16 or heat transferring medium turbulent flow passageway 17 with non-ripple planar sheet 10.
In addition, as shown in figure 21, corrugated foils 9 also can be herringbone ripple, be specially: the medial surface of corrugated foils 9 has some herringbone water conservancy diversion convex tendons 19 arranged in parallel from liquid feeding side to tapping side punch forming, the runner mouth of adjacent row's water conservancy diversion convex tendon staggers setting, and then forms heat transferring medium turbulent flow passageway 18.
As illustrated in figs. 22-25, the invention also discloses a kind of flat-plate solar heat collector based on above-mentioned heat-absorbing plate core, it comprises glass cover-plate 2, frame 3, back of the body frame 4, insulation material 6, heat-absorbing plate core 7, working medium circulation import 8 and outlet 5.
Concrete: glass cover-plate 2, heat-absorbing plate core 7, insulation material 6, back of the body frame 4 are from top to bottom set in parallel in frame 3 successively.For improving heat exchange efficiency, leave one section of air heat insulating layer between transparent cover plate and heat-absorbing plate core, heat exchanger core 7 is close to adiabator layer 6 and compression is placed on back of the body frame 4.In the present embodiment, the board-like heat exchanger core 7 of metal foil and adiabator layer 6 are rectangle, and working medium import 8 and sender property outlet 5 are circular, have two corner right angle opened at rectangle respectively.
Metal foil plate type heat exchanger is connected successively by connecting tube or formation heat exchange array in parallel.Figure 26 gives horizontal series and the vertical series connecting mode of flat-plate solar heat collector array, and it connects and composes heat exchanger matrix by the pipeline connecting parts 20 of use standard.
In actual motion, each main component of heat-transfer working medium can carry out being mixed to get the working medium being suitable for using in this climatic environment by a certain percentage.Heat-transfer working medium composition is 1,3-PD, water and a small amount of anticorrisive agent, and each main component of heat-transfer working medium need mix in the ratio of 5: 4.5: 0.5; Heat-transfer working medium is applicable to middle low-temperature solar energy heat collector, and temperature range of operation is-30 DEG C to 105 DEG C, and operating temperature can the mixed proportion different according to main component adjust; There is certain excursion in the heat-transfer working medium Thermal properties mixed proportion different according to main component; Heat-transfer working medium corrosion protection is strong, and the available metal material of board core material material is as copper, aluminium alloy, Copper-Aluminum compound, stainless steel, galvanized steel etc.; Anticorrisive agent in described heat-transfer working medium is neutral organic carboxyl acid, not phosphate-containing, Boratex, nitrite or amine.
Superconduction contact heat transfer working medium can also be the mixture of methyl alcohol or ethylene glycol or acetone and water and anticorrisive agent.
In mixed working fluid, the ratio of water is higher, and complex heat transfer performance is stronger, but operating temperature lower limit rises; Otherwise the content of water is fewer in mixed working fluid, operating temperature lower limit reduces, but complex heat transfer impaired performance.
The operation principle summary of solar thermal collector is: when solar radiation is through after transparent cover plate, be incident upon on heat-absorbing plate core, overwhelming majority energy is absorbed by heat-absorbing plate core and converts heat energy (small part energy loses with forms such as heat or light reflections) to, then the superconductive heat transfer working medium in heat-absorbing plate core is transferred heat to, the temperature of heat-transfer working medium is raised, and the effective energy as heat collector exports.This is solar water heater known technology.
Claims (8)
1. heat-absorbing plate core, it is characterized in that: described heat-absorbing plate core is that the sheet metal be arranged in parallel by two panels is consisted of hermetically sealed welding, there is a heat transferring medium turbulent flow passageway, and there is the sender property outlet that at least one working medium import be communicated with heat transferring medium runner is communicated with heat transferring medium runner with at least one; The sheet metal that described two panels be arranged in parallel comprises the smooth metallic thin plate of upper end and the corrugated sheet metal of lower end; Described smooth metallic thin sheet surface is coated with composite solar heat absorbing coating, and the punch forming of described corrugated sheet metal inner surface has water conservancy diversion projection or convex tendon;
The medial surface of described corrugated sheet metal is provided with some water conservancy diversion convex tendons arranged in parallel, arranging to tapping side from liquid feeding side of described guiding convex tendon, the setting and the runner mouth of adjacent two row's water conservancy diversion convex tendons staggers; Described water conservancy diversion convex tendon is vertical bar shaped or herringbone.
2. heat-absorbing plate core according to claim 1, it is characterized in that: described corrugated sheet metal is bubble type ripple, the punch forming of described corrugated sheet metal medial surface has the identical or different spherical guide protrusions of the equally distributed dimensions of some rows, and the spherical guide protrusions of adjacent two rows stagger setting.
3. heat-absorbing plate core according to claim 2, is characterized in that: the guide protrusions of described corrugated sheet metal is spheroid, cylinder, circular cone, polyhedron, cuboid; The spread geometry of described corrugated sheet metal guide protrusions is parallelogram, rectangle, circle, ellipse, triangle, trapezoidal, rhombus.
4. based on a flat-plate solar heat collector for ultra-thin superconductive type heat-absorbing plate core, it is characterized in that: comprise transparent cover plate, heat-absorbing plate core, heat-insulation layer and housing; Described transparent cover plate, heat absorbing core plate and heat-insulation layer be arranged in parallel from top to bottom successively, and the smooth metallic plate of described heat-absorbing plate core is towards transparent cover plate, and wavy metal plate is affixed to heat-insulation layer;
The flat-plate solar heat collector of ultra-thin superconductive type also comprises one for installing the metal outer frame of transparent cover plate, heat-absorbing plate core and heat-insulation layer, described metal outer frame is made up of the back of the body frame of side frame and side frame bottom, transparent cover plate is fixed in the side frame top of metal outer frame, and and leaves air heat insulating layer between heat-absorbing plate core.
5. a kind of flat-plate solar heat collector based on ultra-thin superconductive type heat-absorbing plate core according to claim 4, is characterized in that: the side frame of described metal outer frame and back of the body frame can monolithic moldings, also can adopt split type, are connected and fixed by bolt or buckle.
6. a kind of flat-plate solar heat collector based on ultra-thin superconductive type heat-absorbing plate core according to claim 4, is characterized in that: described flat-plate solar heat collector is in series or in parallel to form heat exchange array successively by connecting tube.
7. a kind of flat-plate solar heat collector based on ultra-thin superconductive type heat-absorbing plate core according to claim 4, it is characterized in that: in described heat absorbing core plate, fill superconduction contact heat transfer working medium, its composition is 1, the mixture of ammediol, water and anticorrisive agent, wherein 1, ammediol, water and anticorrisive agent all mix according to the weight ratio of 5: 4.4: 0.5, and described anticorrisive agent is neutral organic carboxyl acid.
8. a kind of flat-plate solar heat collector based on ultra-thin superconductive type heat-absorbing plate core according to claim 4, is characterized in that: described superconduction contact heat transfer working medium can also be the mixture of methyl alcohol or ethylene glycol or acetone and water and anticorrisive agent.
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| CN201510321087.7A CN104976801A (en) | 2015-06-05 | 2015-06-05 | Heat collecting plate core and flat-plate type solar thermal collector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105490638A (en) * | 2015-12-06 | 2016-04-13 | 上海博阳新能源科技有限公司 | High-thermal conductivity photoelectric and photothermal board |
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| CN103759432A (en) * | 2014-01-06 | 2014-04-30 | 南通星昀能源科技有限公司 | Superthin superconducting-type heat absorbing plate core and flat-plate solar collector |
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| WO2000022356A1 (en) * | 1998-10-13 | 2000-04-20 | Karlheinz Raetz | Solar collector with temperature limiter |
| CN102401487A (en) * | 2011-10-28 | 2012-04-04 | 姚卫国 | Superconducting heat pipe flat plate solar heat collector |
| CN102410650A (en) * | 2011-10-28 | 2012-04-11 | 姚卫国 | Heat absorbing plate core device of flat-plate solar collector |
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