DE7813896U1 - SOLAR COLLECTOR FOR GENERATING HOT WATER - Google Patents

Description

HELMUT LENZE
ENGINEER
SCHÖNBUCHSTR. 17th
7o31 GARDEN RINGS

Registration for: / utility model
Inventor: Helmut Lenze
Registration date:

: SOLAR COLLECTOR FOR GENERATING HOT WATER

field of use

The invention relates to a solar collector
in the form of a flax collector, for production
of warm water for space heating or domestic water with the help of solar radiation.

State of
technology

Various types of solar collectors have already been proposed for the production of hot water. Such collectors consist in the simplest case of a housing with a transparent cover and the absorber, which is usually
is traversed by a liquid.
A distinction is made between the "sandwich" and the "tubular construction".

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Criticism rAbsorber in sandwich construction leave only one relative low operating pressure and are therefore from the outset both due to their limited dimensions and derizul. The difference in height between several collectors connected in series can only be used to a limited extent in their application.

Tube absorbers and the absorbers produced using the "rollbond" method generally have internal elements Collecting pipes or collecting canal systems on from the outset Determine the mounting direction, since the problem of ventilation arises.

This venting problem occurs particularly with absorbers with a meandering tube system in appearance.

The flow resistance of the above-mentioned types of absorbers increases sharply when several elements are connected in series, which in turn increases the overall efficiency greatly diminishes.

The often used transparent cover made of glass also sets because of the risk of breakage and weight Limits in the size of the solar panel.

Task: The invention is based on the task

to create an improved type of solar collector for the known, which does not have the disadvantages mentioned and is particularly aimed at inexpensive manufacture as well as aesthetic appearance.

II ·· till

Solution: The invention accordingly relates to a solar collector consisting of a weatherproof housing with a transparent one Cover made of fiberglass-reinforced polyester resin, with individual tube absorber elements inside are arranged.

These absorber elements consist of straight tubes with firmly connected sheet metal fins, with each individual The mouth of the pipe is led to the outside for itself. There is no internal manifold. With this principle, extremely elongated solar collectors with low fluid resistance can be built and produce high compressive strength.

Further embodiment of the invention:

In order to be able to line up such elongated solar collectors side by side and at the same time to be watertight To make it, the profile of the housing has a special shape. It interlocks in such a way that it is splash-proof and collectors of different widths and lengths are combined with one another according to the modular principle be able.

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Achievable benefits:

1. Solar panels of this type are suitable as Continuous elements to fill both roofs and facades, saving the usual roofing can be.

2. Since the solar panel has a Contains a thermal insulation layer, the desired roof or facade thermal insulation can be omitted at the points where a solar collector is mounted.

3. The seamless interlocking of the neighboring Solar collectors allow maximum use of space and also gives a special aesthetic surface design.

4. The straight tubes of the absorber reduce the risk the air inclusions and thus allow any assembly directions (x, y, z see Figure 7).

5. Large operating pressures, which then occur if high, If vertical house facades are laid out, the collector withstands.

6. Due to the low liquid resistance of the absorbers, the collector can work with gravity circulation.

7. The individual absorbers can move in from the outside Choice can be switched in parallel or in series. (see Figure 6)

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8. In parallel connection of the individual absorber elements, the outer manifold in a channel which has the same profile as the collector housing is so uiri collector array shown around that it is invisible out to the outside (see Figure 5).

9. The profile of the housing is designed in such a way that there are water droplets of both as a condensation water channel inside to outside via appropriate ventilation holes, as well as the transparent cover of the These combined functions allow low manufacturing costs.

Description of an embodiment:

An embodiment of the invention is shown in the drawings and will be described in more detail below described. (see Figures 1 and 2) In a housing that consists of the profile sheets 1, 2, and 3 is shaped, there is one or more absorbers (4) which are aligned independently of one another to the longitudinal axis of the housing. The lower part of this case is filled with a thermal insulation material (5) e.g. glass wool. Above that there is a heat-reflecting one Metal foil (6) e.g. aluminum. From above the housing is through the transparent cover, consisting of a frame (7) with an outer

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Foil (8) and inner foil (9) completed. The outer film is made of fiberglass-reinforced, UV-resistant polyester resin with an anti-reflective coating. The inner foil is a particularly heat-resistant film, e.g. Mylar, and can optionally be installed. The circumferential seal (1o) prevents air convection from the inside to the outside. Below the transparent cover there is one or more absorber elements, which consist of a straight tube with firmly connected fins. The surface of the absorber can be selective or simply absorbent. The two fins facing the housing wall are cranked and each snap into a groove in the side insulation (11). To prevent the long absorber elements from bending, support strips (13 ) with insulated support points (14), which also serve as spreading elements for the side insulation (11). On these support strips, webs (12) made of glass fiber reinforced polyester resin are plugged in the direction of the longitudinal axis, which are intended to prevent the cover from sagging as well as the Help reduce air convection within the collector. The ends of the absorber tubes are all led to the outside and are sealed with stuffing boxes (15) (FIG. 4). To avoid a thermal bridge, an insulating sleeve (16) is pushed onto the pipe ends. A flexible hose connection (17) with hose clamps (18) establishes the connection to the collecting pipe (19). The inlet and outlet faces of the collector are passed through each a box profile (2o), which is filled with thermal insulation, completed. \

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The penetration of rainwater is prevented by a circumferential seal (21), which is secured by a metal rail (22) is pressed by means of screw (23) and associated nut (24).

Condensation that occurs inside the collector is out through small bores (25) on the front sides of the housing, the U-indentation of the housing profile serves as a channel and also as a support for the transparent cover.

The solar collector described is designed so that one can seamlessly line it up with the next one (Figure 3). This is created by the interlocking of the side profiles (1) and (2) on the bottom side a channel that may have penetrated Drains off rainwater and at the same time provides space for the anchoring screw (26).

Depending on the desired optical effect, the metal rail (22) snap in a profiled sheet metal (27) which, in the manner shown, part of the obliquely incident solar radiation throws back in the direction of the absorber. By differently designed profiled sheets (27) can the external appearance of the collectors in a row vary.

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A collector field can be built so that the absorber tubes are connected in parallel (Figure 5) or in series (Figure 6).

The collecting pipe for the flow is in Figure 5 below, that for the return at the top .. The collecting pipes run outwards Ηϊη covered by the pipe box (20). Figure 5 shows the combination of collectors with different grid widths B, 2B, 3B, 4B. The grid the absorber tube arrangement is not changed.

A collector with only one absorber lenient has the dimension "B", a collector with η absorber elements has the structural dimension n3. This modular principle ensures the greatest possible flexibility and space utilization achieved.

Figure 7 shows an application example, wherein the collectors are mounted in the X, Y, and Z directions. The elongated design of the collectors with variable width allows individual dimensions and large areas to appear appealing.

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Claims (9)

• · t • ■ · -Sr- ' -g-S- CLAIMS . Solar collector for the production of hot water, thereby characterized in that the absorber elements are lined up individually and independently of one another in a housing and no internal manifold or duct is required. 2. Solar collector according to claim 1, characterized in that the absorber elements are straight tubes with permanently connected Fins are the inlet and outlet ends of which are fed individually to the outer collecting pipes. 3. Solar collector according to claim 1 or 2, characterized in that that an air space is kept free below the absorber, which is covered with a heat-reflecting film concludes. 4. Solar collector according to one of claims 1-3, characterized marked that the housing is formed from a sheet metal profile, the U-shaped bulge both as Condensation gutter serves as a supporting collar for the transparent cover. 7813896 08/31/78 5. Solar collector according to one of claims 1-4, characterized in that that the housing profile on the bottom and on the top so interlocks with the adjacent collector that it is rainwater-tight and acts as a full roof cover instead of a conventional cover. 6. Solar collector according to any of claims 1-5, characterized 'in that regard, the transparent cover of transparent material in longitudinal and transverse direction from the bottom ^r i / ird, so that sagging of the cover is avoided, as well as the convection of air through the absorber surfaces is decreased. 7. Solar collector according to one of claims 1-6, characterized / that the connection of two solar collectors takes place through a sealing strip, which is also the pressure element for the The transparent cover is also a reflector for obliquely incident radiation. 8. Solar collector according to one of claims 1-7, characterized in that that the outer collecting pipes are laid in pipe boxes that run around the collector field. 9. Solar collector according to one of claims 1-8, characterized in that that the use of individual absorber elements results in a modular principle that allows different widths and long solar panels in the shape and orientation you want to be strung together. 7813836 08/31/78