DE7537207U - COMPONENT FOR A SOLAR COLLECTOR - Google Patents

Description

Component for a solar collector

The invention relates to a component for a solar collector with a radiation-permeable, for the flow of a radiation-absorbing heat carrier provided hollow body, which also forms an intermediate space of a Radiation-permeable shell is surrounded.

In a known solar collector, the radiated solar energy is directly at the. Heat transfer medium released. For this purpose, the solar collector consists of a radiation-permeable hollow body through which a radiation- _{absorbing heat transfer medium, for} example in the form of water mixed with coloring matter particles, is passed. This hollow body is surrounded by a likewise radiation-permeable shell to prevent heat losses, forming an intermediate space. Quartz glass is used as the material for the hollow body and the shell. This has the disadvantage that the possibilities of shaping, transporting and installing such solar collectors are limited with regard to the material.

The invention is therefore based on the object of providing a component for a solar collector of the type mentioned at the outset with which insensitive solar collectors of the most varied of types and types can be constructed in a simple manner

7537207 04/22/76

BROWN, BOVERI & CIE · AKTIENGESELLSCHAFT MANNHEIM

BBC BROWN BOVERI

New part of the description page 2a (replaces 6th 6th of the original documents from November 18, 1975)

According to the invention, the component for a -Solarko-llekt-Qr now characterized in that the hollow body and the sheath are preferably made of flexible, Round plastic pipes or hoses in cross section exist, between which spacers are arranged. By choosing flexible plastic pipes or hoses solar collectors of various designs can easily be put together, e.g. in the form of meanders or in the form of pipe walls. Since the component is constructed with round tubes, it can be easily manufactured and the Spacers fix the mutual position of the plastic pipes or hoses.

An advantageous further development of the invention consists in the fact that the outer tube or hose forming the sheath is attached about its third to half its circumference, preferably on the inside, is provided with a mirror coating.

In a preferred embodiment of the component, the spacers are also made of plastic.

To reduce the heat transfer from the inside to the outside It is recommended to use the pipe or hose of the component outer tube or hose to be tightly closed at its ends and at least one connection provided with a shut-off valve to be provided for evacuating the gap. This allows the air in the space in a simple manner removed and thus strengthened the insulating effect of the space be o

Pat-i-072 3500'ΚΕ)

7537207 04/22/76

669/75

Further advantages of the invention emerge from the following description of an exemplary embodiment in connection with the drawing, which shows the following schematically:

1 shows a central longitudinal section through a component according to the invention,

FIG. 2 shows a cross section through the object of FIG. 1 along the section line II - II of FIG. 1,

Fig. 3 is a guided approximately along the section line II-II Section through a variant of the component and

4 shows a section, approximately along section line II-II, through a component with a different design the spacer.

The component shown in abbreviated form in the drawing consists of an inner plastic tube or hose 1 and a outer plastic tube or hose 2 together, both tubes or hoses are flexible and approximately coaxially spaced from one another arranged so that an annular space 7 is created · Around the two tubes oder hose © against each other To fix, spacers in the form of circular plastic disks 4 are provided. (Figs. 1 and 2) These spacers are arranged one behind the other in a tiel number in the axial direction, so that the space is divided into several individual chambers 11 -subdivided. To connect this To produce chambers 11, the spacers are provided with openings 8. At the bottom of the outer tube or hose a connection 6 is provided, which is connected to a shut-off device J3 * B. a Yentil is provided. The ends of the outer tube or hose 2 are on the outer surface of the inner, something

ZFE / P 4 F 1 (0755000 / KE)

7537207 22.04.76

669/75

longer pipe or hose and tightly fastened there, e.g. glued so that the entire space 7 is blocked off from the outside. The protruding ends of the in inner tube or hose are for the supply of a heat carrier intended.

The inside of the outer tube or hose 2 has, as can be clearly seen in particular from FIGS. 2 to 4, a mirror coating 3 on part of its circumference. This mirroring consists, for example, of a vapor-deposited glossy Metal layer and it improves the heat utilization in the component through reflection.

Figures 3 and 4 show cross sections through the component with a different design of the spacers Spacers consist here of evenly distributed webs 9, which starting from the inner tube 1, the gap penetrate radially and are supported on the inside of the outer tube 2. As can be seen from Figure 3, the Web 9 here constant in cross-section and formed with the tubes 1, 2 in one piece, or, as shown in Fig. can be seen, variable in cross section and only formed in one piece with the inner tube 1. Preferably The webs 9 extend approximately over the entire length of the inner tube 1 and thus divide the space 7 into several elongated chambers 11. This version is in not shown in the drawings. To the chambers 11 with each other to connect, each of the webs 9 has a connection opening 10J or the chambers 11 are in particular at their axial ends special connected in that the webs 9 are kept slightly shorter than the space 7 and therefore a connection the chambers is given. For the sake of clarity, only one connection opening 10 is shown (FIG. 3), although all of them Stege .- '9 have such YerbindungsSpröffungen.

ZFE / P 4 F 1 (6755000 / KE)

7537207 22.0476

: 669/75 y

To now with the component according to the invention, which has a length tailored to the amount of heat to be absorbed, one To build a solar collector, for example for solar heating, the component is in any shape, e.g. in shape of meanders or in the form of pipe walls that run through close together lying arrangement of components are formed on areas exposed to the sun, e.g. roofs. Of course, the non-reflective side of the Component facing the sun. The heating system is connected to the ends of the inner pipe or hose 1 and filled with a heat-absorbing heat carrier. This consists e.g. of water with added coloring or Soot particles.

During operation of the heat carrier is _ö eführt through the inner tube or hose, where it receives the incident solar energy under heating. The mirror coating 4 prevents parts of the solar energy that have penetrated the heat carrier without absorption from being lost. Rather, these are reflected towards the heat transfer medium and used further.

To reduce the heat losses of the inner pipe or hose 1 to reduce by convection, the space 7 is at least partially evacuated via the connection 6, so that the The efficiency of the solar collector is improved.

The tubes or hoses 1, 2 are of course made of a plastic of high strength and radiation permeability produce. In particular, the latter applies to the spacers, but preferably to spacers that extend over extend the entire length of the inner tube 1, as is the case with the embodiments according to FIGS can.

ZFE / P 4 F 1 (675.5000 / KE)

7537207 04/22/76

Claims (5)

(replace the originally filed claims 1 "until 11/18/1975) 1. Component for a solar collector with a radiation-permeable, hollow body provided for the flow of a radiation-absorbing heat carrier, which is surrounded by a likewise radiation-permeable shell to form a space, characterized in that the hollow body and the shell are preferably approximately coaxially arranged one inside the other, flexible plastic pipes or hoses (1, 2) with round cross-section, between which spacers (4, 9) are arranged. 2. Component according to claim 1, characterized in that the outer tube or hose (2) forming the shell is provided with a mirror coating (3) on about its third to half its circumference, preferably on the inside. 3. Component according to claim 1 or 2, characterized in that the spacers are made of plastic. 4. Component according to claim 3, characterized in that the spacers each consist of at least one opening (8) having and spaced apart annular disks (4) exist. (Fig. 1, 2) 5. The component according to claim 3, characterized in that the spacers consist of at least three, approximately radially extending, approximately evenly distributed on the pipe or hose circumference and with the inner and / or outer Order plastic pipe or hose (1, 2) that form a single unit (9). (Fig. 3, 4) PaI 4 (1 72 3500 KE ' 7537207 currently 7B 669/75 Component according to Claim 5, characterized in that the webs (9) extend over approximately the length of the inner plastic tube or tube (1) and each have at least one connecting opening (10) for the connection the individual chambers (11) of the space. \ Component according to at least one of claims 1 to 6, ι characterized in that the outer rotar or the Hose (2) is tightly closed at its ends and at least one is provided with a shut-off device (5) Has connection (6) for evacuating the space (7). ZFE / P 4 F 1 (675.5000 / KE)