ES2538926B1 - Solar and environmental thermal collector - Google Patents

Abstract

Solar and environmental thermal collector. # The present invention relates to a solar thermal energy collection system characterized in that the collector surfaces exposed to solar radiation are kept at a temperature lower than that of the environment by thermal contact with a circuit through which a fluid with a temperature lower than the ambient temperature is passed. This will avoid the usual losses of heat, and will turn them into profits, since, with this design, the heat will flow from the environment to the set of surfaces and conduits that constitute the installation of solar energy capture naturally. # To increase this effect , the capturing surfaces will be provided with holes and holes of any shape, as well as protuberances of any design, with the intention of increasing the surface of thermal exchange with the environment, thus increasing the energy taken from it.

Description

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DESCRIPTION

Solar and environmental thermal collector.

The present invention relates to a solar energy collector characterized by being formed by surfaces intended to be exposed to the sun that have holes or holes of different shapes, whether rounded, grooved or any other shape, as well as protrusions in the form of fins, sheets or any other design, all in order to increase the surface of contact with the outside to ensure high heat transmission with the environment. At the same time, these surfaces are in contact through means of high heat transfer capacity with conduits through which a fluid circulating that has a temperature below room temperature circulates.

The purpose of this design is that the surfaces exposed to the sun are kept at a lower temperature than that of the environment, which in normal conditions will be the air, although it could also be water or, where appropriate, snow, even buried in this . In this way, they will have the capacity to capture solar radiation, and also part of the latent heat of the air, water or even snow.

The collector surfaces will be kept in contact, by means of high heat transmissivity, with conduits through which a previously cooled fluid will be passed below room temperature, thus ensuring that said surfaces also have a lower temperature than the ambient . In this way the heat will flow naturally from the outside environment to the picking surfaces, and from these, to the circuit through which the said cooled fluid circulates below the ambient temperature.

The result will be that the fluid that was injected cooled in the circuit, after passing through it, has taken the heat that the surfaces have captured, both that coming from the solar radiation and the one that was captured from the outside environment thanks to the contact between it and the picking surfaces.

The sector of the technique in which the present invention has its application is that of thermal solar energy captation facilities. In them, various means are used to avoid the loss of heat captured by the surfaces exposed to the sun, and also of the content in the carrier fluid to which the aforementioned surfaces transfer all or part of it. On the contrary, the design object of the present invention assumes that, both the capture surfaces and the circuits through which the heat-carrying fluid is conducted, have a lower temperature than the environment in which they are located. As a consequence, heat will flow from the environment to the surfaces and ducts, and not in the opposite direction, so instead of losing heat, they will increase the amount of heat energy captured.

In addition, the proposed design, in which the surfaces intended to receive solar radiation have holes or holes of different shapes, will facilitate the exchange of heat between the surfaces and the environment, thereby increasing this thermal transmission. Therefore, the proposed design means an increase in energy collection, by joining the solar radiation thermal transmission through the contact of the collector surfaces with the environment.

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It is thus possible to change the transfer of heat from loss to gain with the environment of collector surfaces and carrier fluid.

Background of the invention

Solar thermal energy collection systems are generally based on the use of collectors with a design that we could describe as cameras or boxes designed to function as small greenhouses. For this purpose, they have a glazed surface through which the sun's rays penetrate, and inside they have the means for that radiation to become heat, thus raising the temperature of the chamber. Through a duct a fluid is circulated, so that this heat passes from the chamber to the fluid. From here, there are systems in which this fluid is the one that will finally be used for the use of that heat, although the most frequent is to transfer the heat of the fluid to the final system of use, which will normally be sanitary hot water installations or heating.

In order for the heat to flow naturally from the hot chamber to the fluid, it is necessary that a temperature above that of the fluid is reached. At the same time, for the heat to pass naturally from this fluid to the final system of use, it is also necessary that the fluid has a temperature higher than that of said final system of use. This means that a scale of decreasing temperatures must be established from the aforementioned chambers, through the carrier fluid, to the final use system. Depending on the temperature needed in the latter, the temperatures in the former will be increasing.

For the same reason, heat will flow from the chamber and ducts through which the fluid circulates to any space that has a lower temperature, and in particular to the outside, which will lead to heat loss and a decrease in energy heat exploited. Of course, this natural loss is fought through thermal insulation systems, both of the capture chambers and the circuits through which the carrier fluid is transported, whether this is the final destination of that heat, or used to transmit it to the final harvesting system.

Description of the invention

The design proposed in the present application involves starting from a fluid that is noticeably cooler than the environment, a characteristic that it will maintain even after it has been heated upon contact with the surfaces exposed to solar radiation. In addition, this fluid will be brought into contact, through means of high thermal transmissivity, with the picking surfaces, so that it will also keep them at a lower temperature than the ambient temperature. This means that the surfaces themselves will capture, in addition to solar radiation, the heat of the environment.

The purpose of the design included in this patent application, which tends to capture, at the same time as solar energy, the environmental latent heat, can be improved by providing the surfaces for gaps and protrusions to increase the surface of contact with the environment and thus increase as much as possible that thermal exchange, and capture from the environment a greater amount of energy. In this way, not only is not lost, but heat is gained on the pickup surfaces and carrier circuits.

Claims (2)

ES 2 538 926 A1 1. Thermal solar energy collection system characterized in that the collector surfaces exposed to solar radiation are kept at a lower temperature than 5 ambient temperature through thermal contact with a fluid that has a temperature below ambient. 2. Thermal solar energy collection system according to claim 1, characterized by arranging the surfaces to capture holes or holes of different 10 ways, ace! as protuberances of any design, all in order to increase the contact surface with the environment.