Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
  • F24S10/00—Solar heat collectors using working fluids
  • F24S10/50—Solar heat collectors using working fluids the working fluids being conveyed between plates
  • F24S10/504—Solar heat collectors using working fluids the working fluids being conveyed between plates having conduits formed by paired non-plane plates
• • 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

Definitions

• the present invention relates to a solar-energy collec ⁇ tor of the kind set forth in the preamble of the foll- owing main claim.
• Solar-energy collectors of this kind are still encum ⁇ bered with a number of cost-increasing disadvantages.
• In-order to withstand the mechanical stresses and strains which are created partly as a result of ex ⁇ ternal influences and partly as a result of internal pressures in the absorber unit it is necessary to use a particularly strong and robust material, normally copper sheet or aluminium sheet, and sometimes steel sheet, particularly when the heat-transport medium is air.
• the cavity is normally divided into a plurality of mutually parallel ducts.
• the object of the invention is to provide a solar- energy collector having an absorber unit which, despite the use of lightweight and weak materials, is able to withstand strongly external and internal pressures, and which is constructed so as to provide absolutely uniform distribution of the medium flow across the whole cross-section and area of the collector.
• Figure 1 is a front view of a first embodiment
• Figure 2 is a cross-sectional view taken on the line
• Figure 3 is a detail view in perspective of the two plates illustrated in Figures 1 and 2 ,
• Figures *-. and 5 are each front views of a plate having pressed therein recesses to form a wave-shape sector part on respective plates, and
• Figures 6 and 7 are respectively a cross-sectional view and a view taken on the line VII-VII in Figure
• Figures 1 - 3 illustrate two mutually parallel plates 1, 2 made from thin aluminium sheet and having mutually facing, inwardly pressed ridges 3, 4 which cross each other and which are connected to one another at the locations of intersection by means of an adhesive or spot welds.
• the plates are connected around their periphery, in some suitable manner, with a ring-like frame 5 constructed from aluminium section having abutment surfaces adapted to the wave-form of the plates.
• the height of the frame 5 is sufficient to form an air-filled cavity 6 between the absorber unit 1, 2, 3, 4 and a cover plate 7 made of transparent material, for example glass, joined to the frame 5, and a cavity for accommodating heat-insulating material 8 between absorber units and a rear side 9 attached to the frame.
• the frame 5 is provided with through-passing passages 10, which connect the cavity between the plates 1 and 2 to inlet and outlet passages 11, 12 respectively for the medium to be heated.
• the main direction of flow of the medium is indicated by an arrow H in Figure 3 , from which Figure it will be seen that the low-of medium ,will be divided into a plurality of part-flows which are constantly divided up and mixed in a plurality of eddy-currents, which results in rapid and complete temperature equilization should irregularities occur.
• the plates 51, 52 can be joined directly together around the peripheries thereof, although it is then necessary to provide separate inlet and outlet openings 55 and 56 respec- tively.
• the ridges are pressed into the plates 41, 42 in a manner such that the plates are mutually identical and so that, subsequent to turning one plate through 180° in relation to the other plat the ridges 43 will cross one another. The same applies to the plates 51, 52.
• the absorber units need not necessarily comprise two metal plates.
• One or both plates may optionally com ⁇ prise a plastics material.
• the plate onto which radiation from the sun falls may be transparent and the other darkly coloured.
• the liquid may also be darkly coloured, so that the liquid itself is heated by the sun's rays in a known manner.
• the preferred embodiment of a solar-energy collector according to the invention illustrated in Figures 6 and 7 is based mainly on the type of absorber plates 51', 52' illustrated in Figure 5.
• the plates made of steel sheet approximately 1mm in thickness, are supplemented with upstanding rims 61, 62, each of which extends around the periphery of its respective plate and which are terminated with a planar-ring-like flange 63, 64.
• the two plates are also provided with mutually opposite, transversely extending raised portions 65, 66, which together form two distributing ducts 67, 68 which communicate with the mutually intersecting grooves or channels 54 and with a respective inlet and outletpipe- corinector 69, 70.
• a continuous weld extends around the bottom portions 71 of the rims 61, 62 and there joins the plates 51', 52' together. Spot welds are also made at the major part of the intersection locations 72 of the ridges 53, thereby to provide a particularly rigid absorber.
• Each absorber can be manufactured from two -plates 51', 52 ' which are similarly profiled and produced in a large press and which subsequent to turning or.rotating one of the plates are welded back-to-back in an auto ⁇ matic welding machine and provided with inlet and out- let pipe-connectors 59, 70.
• a plastics cover 75 is then arranged on the flanges 63, and on the opposite side there is temporarily arranged a mould (not shown) by means of which a block 76 of cellular plastics can be formed on the rear side of the absorber, the rim 62 and the flange 64 serving as reinforcing means within the block 76. Because the absorber is particularly rigid, no casing is required.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Sustainable Development (AREA)
• Sustainable Energy (AREA)
• Thermal Sciences (AREA)
• Physics & Mathematics (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Photovoltaic Devices (AREA)
• Lining Or Joining Of Plastics Or The Like (AREA)
• Charge And Discharge Circuits For Batteries Or The Like (AREA)
• Laminated Bodies (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=20346524

Family Applications (1)

Country Status (6)

Cited By (1)

Families Citing this family (9)

Family Cites Families (4)

• 1982
  • 1982-04-14 SE SE8202322A patent/SE452188B/sv not_active IP Right Cessation
• 1983
  • 1983-04-13 WO PCT/SE1983/000134 patent/WO1983003660A1/en active IP Right Grant
  • 1983-04-13 US US06/557,291 patent/US4534337A/en not_active Expired - Fee Related
  • 1983-04-13 DE DE8383901255T patent/DE3372305D1/de not_active Expired
  • 1983-04-13 AU AU14749/83A patent/AU557010B2/en not_active Ceased
  • 1983-04-13 EP EP83901255A patent/EP0105318B1/en not_active Expired

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