SU1096455A1 - Solar energy collector - Google Patents

Abstract

1. A SOLAR ENERGY COLLECTOR containing a heat insulating casing, at least a part of the surface of which is double-walled and optically transparent, and a porous solar energy absorber placed inside it in a heated medium, characterized in that it is equipped with optical fibers to improve the efficiency between each other, the optically transparent walls of the casing and made of the same material with them, and an additional absorber of co-energy energy in the form of many metatics of alllike hairs that are reinforced in pop. echnom direction lower transparent wall of the housing and in contact with the lower ends of the heated medium. 2. The collector according to claim 1, from the first and the second so that the upper ends of the hairs are located on the surface of the lower transparent wall of the casing.

Description

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The invention relates to solar technology, in particular to solar energy collectors.

The known collector of solar energy, containing a heat insulating casing, at least part of the surface of which is double-walled and optically transparent, and a porous solar energy absorber 11 placed inside it in a heated medium.

However, in this collector, before it is absorbed by the absorber, the incident solar radiation repeatedly crosses the interfaces between media with different optical properties (refractive indices), which, when the solar collector is stationary, results in multiple radiation reflections.

The purpose of the invention is to increase the efficiency of the solar energy collector.

The goal is achieved by the fact that the solar energy collector containing a heat insulating jacket, at least part of the surface of which is double-walled; and optically transparent, and a porous absorber of solar energy placed inside it in a heated medium, is provided with optical fibers connecting the optically transparent casing walls of the casing and made of the same material to them, and up to the absorber of solar energy in the form of a variety of metallic jolosks that reinforce in the transverse direction, the lower transparent wall of the casing and contacting the lower ends with the heated medium.

Moreover, the upper ends of the hairs are located above the surface of the lower transparent wall of the casing.

FIG. 1 shows a structural diagram of a flat solar collector; FIG. 2 - the same, a tubular collector of solar energy.

The solar energy collector contains a heat insulating jacket 1 (FIG. 1, of which at least a part 2 of its surface 2 is double-walled and optically transparent, and the porous solar energy absorber 4 placed inside it in a heated medium 3.

The collector is provided with optical fibers 5 interconnecting the optically transparent walls b and 7 of the casing 1 and made of the same material with them, and an additional absorber 8 of solar energy in the form of a set of metallic hairs 9, reinforcing in the transverse direction the lower transparent wall b of the casing

1 and contacting the lower ends 10 with the heated medium 3.

The upper ends 11 of the hairs 9 are located above the surface of the lower transparent wall 6 of the casing 1. The upper transparent wall 7 of the casing 1 is cylindrical. The gap 12 mensu walls b and 7 is evacuated. The lead breeders 5 are staggered.

The heated medium 3 is matched with a refractive index close to that of the material of the walls b and 7 and the optical fibers 5.

The solar energy collector may have a casing 1 (FIG. 2} of a cylindrical shape with concentrically arranged optically transparent walls 6 and 7. The lower part of the inner surface of the wall b is covered with a mirror layer 13. The optical fibers 5 are placed between the walls b and 7 radially. The gap 12 between the walls b and 7 is evacuated.

The solar collector works as follows.

The part of solar radiation that undergoes total internal reflection at the interface of the upper transparent wall 7 and the gap 12 (FIG. 1) of the housing 1 is fed to the lower transparent wall 6 by means of optical fibers 5 and is absorbed by the metallic hairs 9 contacting the lower ends 10 with the heated Wednesday 3.

Part of the radiation coming directly through the wall 7 is absorbed by the upper ends 11 of the hairs 9 and is also transmitted by them to the heated medium 3,

The total internal reflection of radiation at the interface between the bottom wall b and the heated medium 3 is compensated for by its absorption by the hairs 9 reinforcing the wall b, as well as by the heating medium 3. Some of the radiation passing through the double wall casing 1 is absorbed inside the collector by a porous absorber.

Due to the introduction of solar energy into the collector between the transparent walls B and 7 of the housing 1 of the light guides 5 and the reinforcement of the lower wall with hairs 9 absorbing solar radiation, most of the solar radiation undergoing total internal reflection at the interfaces of the optically transparent two wall casing 1 is absorbed and transmitted heated environment 3, which increases the efficiency of the collector of solar energy.

Claims (3)

1. A SOLAR ENERGY COLLECTOR containing a heat-insulating casing, at least part of the surface of which is made of double-walled and optically transparent, and a porous solar energy absorber * placed inside it in a heated medium, characterized in that, in order to increase the efficiency, it is equipped with optical fibers, connecting optically transparent walls of the casing and made of the same material with them, and an additional absorber of solar energy in the form of many metal hairs reinforcing in the transverse direction the lower transparent wall of the casing and the lower ends in contact with the heated medium. 2. The collector according to claim 1, with the fact that the upper ends of the hairs • are located above the surface ^{: the} surface of the lower transparent wall of the casing. 5 3 10 d FIG. 7 Oh Oh hU Joint venture joint venture 10964 55 ϊ