ES2315177A1 - Thermal solar captor made of glass - Google Patents

Abstract

Solar captor made of glass, of the type which defines a closed chamber (2) by means of a transparent cover (3), and inside includes a circulation passage for water to be heated, wherein the water circulation passage is formed by means of two transparent and opposed plates (4) and (5), between which water circulates in a thin continuous layer.

Description

Solar thermal collector in glass.

Technical sector

The present invention is related to the water heating by solar energy, proposing a thermal sensor intended for this function, with some features that make it structurally and functionally advantageous.

State of the art

Among the energy applications of energies renewable, the water heating technique is known for solar energy, using thermal sensors that perform the use of solar radiation to capture the heat of said radiation and bring it to the water it is about to heat.

Conventional solar thermal collectors of said function, they consist of a structural set formed by a layer of insulating material, determining above a chamber which closes with a transparent cover, in which camera is includes, in an atmosphere of air, inert gas or vacuum, a coil through which the water to heat circulates.

This formation of thermal sensors solar entails a complexity of realization, due to the configuration of the water circulation coil to heating and mounting inside the collector chamber solar thermal, which is expensive in labor and machinery of construction.

The coil for water circulation to heating is also usually copper, for the qualities of thermal conductivity and oxidation resistance of this material, resulting in the coil, an expensive element, due to the amount of material required and the high cost of copper and the labor necessary to perform the corresponding welds, etc.

Object of the invention

According to the invention, a solar thermal collector intended for the aforementioned function of water heating, whose realization has been developed according to a structural formation that corrects the inconveniences of conventional thermal sensors of the same application, providing advantageous functional characteristics.

This solar thermal collector object of the invention also consists of a layer of insulating material, and a structure of three glasses separated from each other by two spaces of twelve to fifteen millimeters, including in the lower step water to heat.

According to the invention, the circulation step of water is formed in this case by two transparent plates of glass or similar, arranged facing each other within the solar thermal collector chamber, determining between them a continuous and low thickness surface space, whereby It establishes the circulation of the water to be heated.

In this way a thermal sensor is obtained glass solar, in which the water to be heated is exposed to surface mode and directly to the sun's radiation incident, thereby achieving optimal use of the calorific effect of said radiation on the water of application.

With this provision the constructive realization of a coil and the subsequent assembly of the same in the solar thermal collector, but only requires the placement of the plates between which the conduction is determined of water, which simplifies the constructive and solar thermal collector assembly, significantly reducing the cost of the same.

In a practical way the incorporation of  a sheet covering of conductive material tinted with a highly selective material, on one of the formation plates of water conduction, which increases the effectiveness of the thermal absorption of incident solar radiation, at a cost reduced material used, since the sheet covering  for that purpose it requires very little amount of conductive material in Comparison with solar thermal collector coils conventional.

For all this, the solar thermal collector in glass object of the invention results in characteristics certainly advantageous, acquiring own life and character preferred in the application function to which it is destined.

Description of the figures

Figure 1 shows a schematic section cross section of the solar thermal collector in glass object of the invention, according to an embodiment example.

Figure 2 is a scheme like the one in Figure above, according to another embodiment.

Detailed description of the invention

The object of the invention relates to a solar thermal collector, of those used for water heating intended for any purpose of application, such as domestic hot water, heating or solar cold, with an embodiment of said solar thermal collector that improves constructive and functional characteristics.

The proposed solar thermal collector consists,  according to a conventional way, of a layer of insulating material (1), which determines at the top a camera (2) that is closed by a transparent cover (3), including in the chamber (2) an atmosphere of air, inert gas or vacuum.

According to the same conventional way, within the chamber (2) there is a passage of circulation of the water to be heated, so that the thermal energy of solar radiation that they hit through the transparent cover (3) is captured and transmits to circulating water.

According to the invention, the step of water circulation inside this solar thermal collector it is formed by two transparent plates (4) and (5), of glass or similar, which are arranged inside the chamber (2) in position  faced with a small separation between them.

In the assembly arrangement said plates facing (4) and (5) are established with a tight seal, of so that there is a space between them (6) by which you can determine a water circulation between one or more entrances through a end and one or more exits at another end.

This results in a solar thermal collector in glass, in which the circulation of water inside is produced by the space (6) that determines an extended water layer on a relatively large and slightly thick surface, on the which achieves a very effective heating action by solar radiation hitting the roof transparent (3), since the thermal transmission of said Water radiation occurs in those conditions with maximum effectiveness.

To improve thermal energy collection of radiation and its transmission to water in the space of circulation (6), covering one of the plates (4) or (5) with a sheet layer (7) of conductive material tinted with a highly selective material, which captures and accumulates energy thermal solar radiation incident, yielding said thermal energy to water circulating through space (6).

Laminar covering of conductive material (7)  it requires a very thin layer for this purpose, which makes the increase in the cost of the solar thermal collector, due to the incorporation of said covering (6), is unimportant; the covering (6) can be incorporated, both on the plate bottom (4), according to the embodiment of figure 1, as on the top plate (5), according to the embodiment of figure 2, without It alters the concept.

Claims (2)

1. Solar thermal sensor in glass, of the type comprising a layer of insulating material, determining a chamber that is closed at the top by a transparent cover, including in said chamber a passage of water circulation to be heated, characterized in that the passage The circulation of water through the interior is formed by two transparent plates (4) and (5), which are arranged facing a small separation between them and sealed them in the assembly arrangement, leaving between them a space (6) whereby the water circulates extended in a thin layer. 2. Solar thermal collector in glass, according to the first claim, characterized in that on one of the plates (4) or (5) that form the water conduction space (6), a laminar covering (7) of conductive material tinted with a highly selective material.