DE8012126U1 - SOLAR ABSORBER - Google Patents

Description

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Solar absorber

It is well known that the use of solar energy depends on the nature of the heat transfer medium (water, air or OeI) various solar systems made of glass, metal or plastic are used to heat these media. In all cases, the largest possible absorber surface must be formed in the solar collector to accommodate the heat transfer medium to bring into intimate direct contact with the absorber system and rapid absorption and utilization to get the heat of the sun.

The use of relatively rigid and heavy materials such as glass and metal requires certain structural elements Requirements. For example, fixed, flat mounting elements such as frames or signs must be set up in any way of the finished absorber, or architectural measures must be taken, as is the case with so-called summer houses for mounting the absorber on site (roofs, walls, etc.). Here must be special the not inconsiderable weight of such systems must be taken into account.

The manufacture of these rigid systems is also associated with considerable labor. The senior Elements are also susceptible to the formation of deposits on the inner walls, especially with "hard" calcareous water and if the Collector system due to risk of frost. In addition, there is also the susceptibility to corrosion from the inside and outside, that is overall phenomena, especially the exploitation of the heat available from the sun through increasing insulation effect affect the walls.

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The use of the heat carrier "air" has so far been necessary due to the complex nature of the heat transfer medium Absorber when using rigid building material because of the necessary large internal geometry and weight and the relatively complex assembly has been neglected. However, moving air is used as a heat transfer medium special advantages because it heats up very quickly and is easy to move. Suitable Spacious absorber with easy assembly properties would be able to promote the use of this heat carrier significantly, so that large rooms such as factory halls can be heated without coupling a network system to the solaria technical facility.

ff When using plastics, many of these come into play

I Disadvantages in discontinuation.

I Problems arise, however, from the low pressure

I and bending (buckling) load capacity of the plastic collector

I fool. With external loads or sharp pressure and

I Kinks can very easily interrupt flow

I and congestion in the tubes or mats arise

ι] * Circumstance which, for example, is disadvantageous in the case of exposed collars

I lecturers (e.g. swimming pools) or when laying roofs with

■■! can affect sharp changes in level. This he

I also find it difficult to use flat-plate collector systems

I as wet roof coverings. Such a possibility would

I the investment costs for solar heating in solar pods

% sern substantially reduce and the construction of solar houses

favor.

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i The object of the invention is to provide a flow element for

I; To create heat transfer media made of plastic for solar collectors.

% fen, which has good assembly properties, high flexibility,

i | low weight with high strength as well as one

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Ij large inner flow space a sufficient pressure and

Bending (kink) - has stability.

According to the invention this is achieved in that a Mat-like, resilient, horizontally very open and permeable scrim made of metal wire or synthetic yarn, especially monofilaments with a third dimension defined in height is provided on both sides with a flat gas-tight and airtight cover that between these covers a pressure and kink-resistant flow space is available.

The use of a scrim in the intended type not only enables the formation of a flow space with a volume of practically any size for the area of application of the solar collectors, above all it allows Also a very universal one due to the flexibility, the low weight and the easy installation option Applicability. Cavity mat systems add unevenness or changes of direction in the course of the load-bearing Surfaces, e.g. the roof pitch, floors and walls and can be mounted vertically or horizontally regardless of direction will.

Above all, they also allow the inexpensive manufacture of collector systems with properties that can be varied to a large extent. Both are according to other manufacturing methods, such as e.g. in the manner of double-layer uncut pile fabric or not to be reached by two layers of fabric connected by a binding chain.

The scrims proposed according to the invention are made according to known ones Processes produced which are not the subject of this invention. They can be made of metal wire or textlien Yarns are made. Synthetic monofilaments are in accordance with the invention or by soaking, sheathing or similar processes to stiffened multifilaments or fiber yarns prefer, whereby the stiffening and mutual consolidation of the structure also through a subsequent loading

act by watering. ! Dipping or spraying achieved or can be increased. Such a scrim is covered on both sides by means of a plastic layer, which is applied either directly from the extruder or the calender to the flat fabric web or as prefabricated film is applied by means of known processes such as gluing, plasticizing or flame lamination.

Depending on the type of heat carrier and the temperature conditions, both layers can be opaque and heat-storing (e.g. black) or one layer translucent and the second layer heat-storing or be designed to be heat reflective.

A particular advantage of this invention can be seen in the fact that, instead of paintwork, it is used in such Covering is possible, either by embedding very party-resistant lightfast pigments in the cover layer to achieve a practically total absorption of the sun's heat or by metallization or high-gloss mirroring or structuring of the surface an effective reflection of the incident sunlight to reach. These methods result in unusually short response times and a high efficiency of the collectors.

The design according to the invention also offers the possibility of using the flat-plate collectors in areas in where pressure or kinking effects are unavoidable. The problem-free use as a Roof skin, facade seals and storage in heat sources such as earth, manure or compost or as a flat Think of installed collectors in accessible outdoor areas (e.g. swimming pools).

Since the absorber mat is made of thermoplastic material, it can be welded or similar. known procedures can be parceled out and joined as required (Fig. 2).

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This parceling allows the flow of the heat transfer medium in the horizontal or vertical and if necessary, the cycle can be extended.

Description of the images

Figure 1 shows a cross section through a cavity mat according to the invention.

a = spring elastic in the horizontal very permeable in dimension (d) custom-made scrim made of metal wire or yarn.

b uijd c - gastight and airtight cover d = pressure and bending stable cavity

Figure 2 shows the perspective view of the cavity mat

a = elastic in the horizontal plane, very permeable in dimension (d), dimensionally defined Scrim made of metal wire or thread

b and c «gas-tight and airtight cover d = pressure-resistant and flexurally stable cavity

S = weld seams (especially high-frequency welds for partial division of the Cavity mat

P = a tubular parcelling. But there are also other types of operational conditions Splitting by welding, sewing or other '; Procedure possible.

Claims (22)

Protection claims: 1.) Solar absorber, characterized by a resilient, flat, very open fabric (a) made of metal wire or synthetic thread with a third dimension defined in height (d), which has a gas- and air-impermeable cover (b) and (c) on both sides, so that between These two covers have a cavity (d) with a certain dimension. 2.) Solar absorber according to claim 1, characterized in that the scrim consists of a metal wire. 3.) Solar absorber according to claim 1, characterized in that the scrim consists of a monofilament, multifilament or Fiber yarn. 4.) Solar absorber according to claims 1-3, characterized in that the yarn of the scrim by dipping or spraying is sheathed. 5.) Solar absorber according to claim 1- 4, characterized in that the cover has a direct or indirect coating is. 6.) Solar absorber according to claims 1-4, characterized in that the cover is a hot melt or cast film is. 7.) Solar absorber according to claims 1-4, characterized in that the cover is a laminated film. 8.) Solar absorber according to claims 1-4, characterized in that the cover consists of a coated textile There is a flat structure (fabric, fleece, braid). 9.) Solar absorber according to claims 1-8, characterized in that both covers are made of the same Material. 10.) Solar absorber according to claims 1-8, characterized in that both covers are made of different materials exist. 11.) Solar absorber according to claim 1-8, characterized in that that both covers have the same thickness, color and transparency. 12.) Solar absorber according to claim 1-8, characterized in that the covers of different thickness, color and Have transparency. 13 ") Solar absorber according to claim 1 - 12, characterized in that that one or both surfaces of the covers are structured. 14.) Solar absorber according to claim 1 - 12, characterized in that one or both surfaces of the covers are high gloss. 15.) Solar absorber according to claims 1-12, characterized in that one or both surfaces of the covers are metallized. 16.) Solar absorber according to claim 1 - 12, characterized in that the metallization is a metal foil. 17.) Solar absorber according to claim 1 - 12, characterized in that the metallization is a galvanization. 18.) Solar absorber according to claim 1 - 12, characterized in that the metallization is vapor deposition. 19.) Solar absorber according to claim 1-18, characterized in that one or both covers by the Admixture of electrically conductive Hgmenten or metallic particles are electrically conductive. 20.) Solar absorber according to claim 1-19, characterized in that the cavity mat is parceled out. 21.) Solar absorber according to claims 1-20, characterized in that the parcelling is welded. 22.) Solar absorber according to claim 1-21, characterized in that the course of a parceling Heat carrier is extended in the horizontal or vertical.