CN201032297Y - Bearing type flat solar energy thermal collector - Google Patents

Bearing type flat solar energy thermal collector Download PDF

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Publication number
CN201032297Y
CN201032297Y CNU2007200374081U CN200720037408U CN201032297Y CN 201032297 Y CN201032297 Y CN 201032297Y CN U2007200374081 U CNU2007200374081 U CN U2007200374081U CN 200720037408 U CN200720037408 U CN 200720037408U CN 201032297 Y CN201032297 Y CN 201032297Y
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CN
China
Prior art keywords
plate
heat
solar
collector
cover plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CNU2007200374081U
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Chinese (zh)
Inventor
徐新建
张小松
王万忠
李舒宏
杨磊
焦青太
彭东根
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JIANGSU TAIYANGYU SOLAR ENERGY CO Ltd
Southeast University
Original Assignee
JIANGSU TAIYANGYU SOLAR ENERGY CO Ltd
Southeast University
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Application filed by JIANGSU TAIYANGYU SOLAR ENERGY CO Ltd, Southeast University filed Critical JIANGSU TAIYANGYU SOLAR ENERGY CO Ltd
Priority to CNU2007200374081U priority Critical patent/CN201032297Y/en
Application granted granted Critical
Publication of CN201032297Y publication Critical patent/CN201032297Y/en
Anticipated expiration legal-status Critical
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/40Solar thermal energy, e.g. solar towers
    • Y02E10/44Heat exchange systems

Abstract

The utility model relates to a solar-energy heat collector of pressure-plate type, which is an improvement of a conventional plate solar-energy collector. The utility model can be used in the way as a traditional solar-energy heater employ water as working medium, and can also be used as a direct-expansion solar-assisted heat-pump by adopting refrigerant agent as working medium; the top of the solar-energy heater is provided with a glass cover plate (1), the bottom of which is a polycarbonate (PC) transparent cover plate (2); small fins (3) are connected with the lower surface of the PC transparent cover plate (2), the bottom of which is provided with an endothermic core plate (4), the upper surface of which is the material (7) with honeycomb structure; the bottom of the endothermic core plate is coated with a bottom insulation layer (5), inside of which is provided with a pressure pipeline (6). The plate structure of the solar-energy collector can combine well with a building under on water storage tank arrangement, realizing integration of the collector and a building.

Description

The pressure-bearing type flat-plate solar collector
Technical field
The utility model is a kind of the classic flat-plate solar thermal collector to be improved, making can be that the conventional solar boilers mode of water is used with the working media, can use with the direct expanding solar heating pump evaporimeter of cold-producing medium again as working media, belong to solar water heater, the technical field of solar heat pump.
Background technology
The solar energy heating technical development is to the today of technically collecting efficiency aspect no matter, still coml cost performance aspect has all possessed the condition that large-scale promotion is used, but also needs further to improve at installation form, security life-span and with the coordination aesthetic of building.Heat collector must be as the part of building, and both organically combine on aesthetic effect, heat collector must with the same life-span of building.Flat plate collector has the incomparable advantage of other heat collector in this respect:
1) flat plate collector does not have the vacuum requirement, and the life-span is longer, especially high-quality from the full copper heat collector of melting welding, its life-span even also longer than structure trunk.
2) in flat plate collector, working media flows in metallic conduit, does not contact glass and can not cause that water or a large amount of leakage of working medium cause systemic breakdown because of cold fried, hot exploding.
3) in the flat plate collector, heat collecting element and walk between the wet part to be welding or all-metal sealing does not use inevitable aging in time cushion rubber, the long-time running better reliability.
4) flat plate collector realize no gap install produce hot water in, thereby the repertoire that has traditional roofings such as insulation, heat insulation, shading, the rain that keeps out the wind concurrently partly or entirely replaces roof Material minimizing construction cost.
5) the flat plate collector shape and structure is flexible, is easy to make heat collector and architecture noumenon to reach combination.
Have above plurality of advantages just because of flat plate collector, account for more than 80% of the total volume of production and marketing of solar thermal collector in the volume of production and marketing of developed area flat plate collectors such as Europe, the U.S., Australia.
But,, directly add hot water to satisfy domestic hot-water supply by solar energy because the working media of classic flat-plate solar thermal collector generally is a water.Though this mode is simple, may produce in the winter of cold and freeze phenomenon, even can bursting by freezing heat collector itself.And present freezing proof technique also is in development period, can not be satisfactory, and the classic flat-plate heat collector is restricted in the use of high latitude cold district.And when solar radiation is not enough, only adopt solar energy heating water can't satisfy domestic hot-water's temperature requirement.The defective of flat plate collector aspect heat loss also clearly needs to improve collecting efficiency by certain measure.
Summary of the invention
Technical problem: the purpose of this utility model provides a kind of pressure-bearing type flat-plate solar collector that can use the different operating medium, can adopt different cold-producing mediums according to different needs, all can operate as normal under different evaporating pressures.
Technical scheme: pressure-bearing type flat-plate solar collector of the present utility model, glass cover-plate, polycarbonate transparent cover plate, little fin, heat absorption central layer, bottom heat-insulation layer, bearing pipe, cellular structural material; The top of this solar thermal collector is glass cover-plate, in the bottom of glass cover-plate is the polycarbonate transparent cover plate, lower surface at the polycarbonate transparent cover plate is connected with little fin, bottom at the polycarbonate transparent cover plate is the heat absorption central layer, upper surface at the heat absorption central layer is provided with cellular structural material, bottom at the heat absorption central layer is the bottom heat-insulation layer, is provided with bearing pipe in the heat-insulation layer of bottom.On bearing pipe, be provided with electric expansion valve
The medium pipeline that is welded under the heat absorption central layer is improved, in order to adapt to operation, suitably increased pipe thickness, to improve its load performance at the solar heat pump mode.Simultaneously because the molten water-based of some cold-producing medium is relatively poor, at heat collector appropriate location installing drier, to avoid " ice berg " phenomenon.In order to make full use of solar energy and to reduce heat loss, adopt the polycarbonate transparent cover plate that has fin, and on the heat absorption central layer, place cellular structural material, to reduce convection current and radiation loss, collecting efficiency is increased greatly.Electric expansion valve is set on medium pipeline, regulates refrigerant flow and make the load coupling.
Beneficial effect: the beneficial effects of the utility model are: adopt pressure-bearing pipe runner, changing working media is cold-producing medium, make heat collector as the solar heat pump evaporimeter, make and work with the solar heat pump form under domestic hot-water's the situation can't directly obtaining.Simultaneously,, can adopt different cold-producing mediums according to different needs owing to adopt the bearing structure pipeline, all can operate as normal under different evaporating pressures.
1. this flat plate collector can use different working medias, uses flexibly;
2. dual anti-heat loss measure has improved the collecting efficiency of heat collector greatly.
Description of drawings
Fig. 1 is the schematic diagram of this flat plate collector.
Wherein have: glass cover-plate 1, polycarbonate transparent cover plate 2, riblet sheet 3, heat absorption central layer 4, bottom heat-insulation layer 5, bearing pipe 6, cellular structural material 7.
Fig. 2 is the horizontal sectional structure schematic diagram of Fig. 1.
Fig. 3 cellular material structural representation.
The specific embodiment
Fig. 1 is the schematic diagram of this flat plate collector.Glass cover-plate 1 plays the effect that reduces heat radiation and produce greenhouse effects; Polycarbonate transparent cover plate 2, riblet sheet 3 constitute the polycarbonate transparent cover plate with little fin for one, and these little fins have formed many little spaces above the heat absorption central layer, in order to suppress natural convection air; Heat absorption central layer 4 is the heat absorption aluminium sheets that scribble coating, and coating adopts the selectivity anodized coatings; Bearing pipe 6 adopts the good copper pipe material of heat conductivility, suitably increases pipe thickness, improves its bearing capacity, and making working media can be various cold-producing mediums, and heat collector can be used as the solar heat pump evaporimeter and uses; Cellular structural material 7 is that this kind material directly is placed on the absorber plate plate face, can reduce surperficial natural convection air, and greatly reduces heat loss through radiation.Honeycomb and with ribbing Merlon cover plate has played the effect of double inhibition heat collector heat loss.The mineral wool insulation is adopted in the bottom, has further reduced heat loss, improves collecting efficiency.Adding man-hour, pressure-bearing pipe and absorber plate adopt and are welded to connect, and should guarantee that weld strength is enough, can't produce air cleft, reduce thermal contact resistance as far as possible.
The top of this solar thermal collector is glass cover-plate 1, in the bottom of glass cover-plate 1 is polycarbonate transparent cover plate 2, lower surface at polycarbonate transparent cover plate 2 is connected with riblet sheet 3, bottom at polycarbonate transparent cover plate 2 is heat absorption central layer 4, upper surface at heat absorption central layer 4 is provided with cellular structural material 7, bottom at heat absorption central layer 4 is a bottom heat-insulation layer 5, is provided with bearing pipe 6 in bottom heat-insulation layer 5.On bearing pipe 6, be provided with electric expansion valve.Because under the operation of heat pump state, the evaporating pressure of cold-producing medium is much larger than the pressure of normal life hot water, the load performance of traditional sucrose runner can't satisfy the evaporating pressure requirement, therefore must use the pipeline with higher bearing capacity instead.Medium runner is handled through special processing, can bearing certain pressure, in pipeline, evaporate requirement thereby can satisfy cold-producing medium.
The heat loss of flat plate collector mainly concentrates on the heat loss through convection of thermal-arrest plate and surrounding air.For the heat collector that cover plate is arranged, convection losses divides for again by the interior convection losses of absorber plate to cover plate, and by the outer convection losses of cover plate to surrounding air.Under calm situation, outer convection losses is caused by free convection.When hanging down wind speed, cross-ventilation is also dominant.Though also should manage to reduce outer convection losses, convection losses in the most effective still minimizing is to reduce the temperature of cover plate.Convection losses in reducing, method commonly used is to dwindle the air gap and insert heat-barrier material between absorber plate and cover plate.The design settles the polycarbonate transparent cover plate above absorber plate, the riblet sheet under the cover plate is separated into many little passages to air flow channel, is equivalent to reduce the air gap; The cellular material of laying on absorber plate simultaneously, itself has also reduced air flow spaces.Therefore, can effectively reduce interior convection losses.
In the heat collector course of work, when the plate temperature was higher than environment temperature, heat collector is environmental radiation heat transfer towards periphery unavoidably, and this part radiation heat loss also is the pith of flat plate collector heat loss.In the design, effectively reduced the radiant section heat loss by a kind of cellular structural material by on absorber plate, arranging.Honeycomb as shown in Figure 3, its principle that reduces radiation loss is: each honeybee lattice of honeycomb all are orthohexagonal hollow cylinders, the light transmittance of honeybee lattice can reach more than 97% for directional light, for uneven light, honeybee lattice wall can paste the single face of out of plumb honeycomb with panel, and then honeycomb has just had good photo absorption performance.Because honeybee lattice wall can shelter from most of sunlight, the repeatedly reflection of light is all carried out on honeybee lattice wall, so light almost all absorb by honeycomb, if honeycomb is a black, the photo absorption performance of honeycomb will be near absolute black body.By this measure, greatly reduce radiation loss.Simultaneously, on absorber plate, lay cellular structural material, itself also reduced air flow spaces, also effectively reduced interior convection losses.
Directly influenced the performance of solar water heater attached to the quality of the heat absorbing coating on the heat collector heat-absorbing plate core.Heat absorbing coating can be divided into non-selective coating and selective coating two big classes generally, and the important indicator of distinguishing their heat absorption capacities is its absorptance α and the ratio cc/ε of emission than ε.α/the ε of non-selective heat absorbing coating=1; α/the ε of selective heat absorbing coating〉1, and be all selective heat absorbing coating, and the general big more person of ratio, performance is good more.Another important indicator of heat absorbing coating is its weatherability, and its quality is related to coating down to the water heater length in service life.The selectivity anodized coatings is to be widely used in comparatively ideal coating on the flat type solar heat collector, its α/ε at present〉3, service life is about 10 years.Comprehensive its heat absorption capacity and service life, the design adopts the selectivity anodized coatings.
With ribbing polycarbonate transparent cover plate and cellular structural material have significantly reduced the cross-ventilation on heat absorption central layer surface, and have significantly reduced radiation loss, make collecting efficiency obviously increase.The selectivity anodized coatings has improved the overall performance of heat collector.
Electric expansion valve on the medium pipeline can be regulated refrigerant flow according to different burden requirements, and the step-down of throttling simultaneously makes evaporation capacity satisfy the load coupling.
Because the medium pipeline different cold-producing mediums that can flow can experimentize by utilizing different cold-producing mediums, it is higher relatively and satisfy the cold-producing medium of environmental requirement to find out efficient, as the working media of heat collector.The dual anti-heat waste measure of Merlon and honeycomb has improved the collecting efficiency of heat collector, and the system that makes still can use comparatively efficiently in the out of condition occasion of solar radiation.

Claims (2)

1. pressure-bearing type flat-plate solar collector, the top that it is characterized in that this solar thermal collector is glass cover-plate (1), in the bottom of glass cover-plate (1) is polycarbonate transparent cover plate (2), lower surface at polycarbonate transparent cover plate (2) is connected with little fin (3), bottom at polycarbonate transparent cover plate (2) is heat absorption central layer (4), upper surface at heat absorption central layer (4) is provided with cellular structural material (7), bottom at heat absorption central layer (4) is bottom heat-insulation layer (5), is provided with bearing pipe (6) in bottom heat-insulation layer (5).
2. pressure-bearing type flat-plate solar collector according to claim 1 is characterized in that having adopted the dual heat loss that prevents of Merlon fin cover plate and honeycomb, is provided with electric expansion valve simultaneously on bearing pipe (6).
CNU2007200374081U 2007-05-15 2007-05-15 Bearing type flat solar energy thermal collector Expired - Lifetime CN201032297Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2007200374081U CN201032297Y (en) 2007-05-15 2007-05-15 Bearing type flat solar energy thermal collector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU2007200374081U CN201032297Y (en) 2007-05-15 2007-05-15 Bearing type flat solar energy thermal collector

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100460778C (en) * 2007-05-15 2009-02-11 江苏太阳雨太阳能有限公司 Pressure-bearing multi-media flat-plate solar energy heat gathering device
CN102032615A (en) * 2010-12-28 2011-04-27 梁长宁 Solar heater

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100460778C (en) * 2007-05-15 2009-02-11 江苏太阳雨太阳能有限公司 Pressure-bearing multi-media flat-plate solar energy heat gathering device
CN102032615A (en) * 2010-12-28 2011-04-27 梁长宁 Solar heater
CN102032615B (en) * 2010-12-28 2013-02-27 梁长宁 Solar heater

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C14 Grant of patent or utility model
GR01 Patent grant
AV01 Patent right actively abandoned

Effective date of abandoning: 20070515

C25 Abandonment of patent right or utility model to avoid double patenting