This Non-provisional application claims priority under 35 U.S.C. §119(a) on Patent Application No(s). 099112923 filed in Taiwan, Republic of China on Apr. 23, 2010, the entire contents of which are hereby incorporated by reference.
1. Field of Invention
The invention relates to a power generating module and, in particular, to a thermoelectric generating module.
2. Related Art
Due to the crisis of exhaustion of non-renewable energy and the global upsurge of environmental consciousness, exploitation of renewable energy has become a very important subject nowadays. Because solar energy is inexhaustible in supply and always available for use, the technology of power generation by making use of solar energy is developed recently.
In general, there are two ways to transform solar energy into electricity. One is that the semiconductor unit receives the photon energy from solar light to generate current, and this is called photoelectric power generation. The other is that the thermoelectric material receives and converts the thermal energy from solar light to the electric energy, and this is called thermoelectric power generation.
Regarding to the thermoelectric power generation, it started from the discovery of thermoelectric effect disclosed by physicist. The discovery teaches that a current loop can be created in a closed loop formed of two metals joined in two ends with a temperature difference between the junctions. In the beginning, because the thermoelectric effect in such metals is weak, it just can be applied to the measurement of temperature or radiation energy. For example, a thermocouple, a typical case applying thermoelectric effect, is commonly used in factories and laboratories for measuring temperature. Until the end of the 1950s, some semiconductor materials were discovered to have strong thermoelectric effect, and thus the applications of thermoelectric effect began to be valued highly. In such applications, p-type semiconductor and n-type semiconductor replace the metals and are connected in series to form the thermoelectric generating device. Based on Seebeck effect, the thermoelectric generating device can generate a current according to the provided temperature difference.
Therefore, it is a very important subject to provide a thermoelectric generating module that can enhance efficiency of power generation.
In view of the foregoing subject, an object of the invention is to provide a thermoelectric generating module that can enhance efficiency of power generation.
To achieve the above object, a thermoelectric generating module according to the invention includes at least one thermoelectric unit and at least one light-concentrating unit. The thermoelectric unit has a first surface and a second surface disposed oppositely. The light-concentrating unit is disposed adjacent to the thermoelectric unit and concentrates light on the first surface of the thermoelectric unit.
As mentioned above, in the thermoelectric generating module of the invention, the light-concentrating unit concentrates light on the thermoelectric unit, so that the thermal energy of the light can be concentrated on the thermoelectric unit. Accordingly, the efficiency of power generation of the thermoelectric generating module can be enhanced.
The invention will become more fully understood from the detailed description and accompanying drawings, which are given for illustration only, and thus are not limitative of the present invention, and wherein:
The present invention will be apparent from the following detailed description, which proceeds with reference to the accompanying drawings, wherein the same references relate to the same elements.
As shown in
The light-concentrating unit 12 is disposed adjacent to the thermoelectric unit 111 and concentrates a light on the first surface 111 of the thermoelectric unit 11. The light-concentrating unit 12 can be of reflective type or refractive type, and include at least a Fresnel lens, at least a convex lens, a plurality of prisms, or a reflector. As an example, the light-concentrating unit 12 of the embodiment is a convex lens of refractive type.
The light is concentrated on the first surface 111 of the thermoelectric unit 11 by the light-concentrating unit 12. Here, the concentration of the light means the intensity of the light is intensified, but the focus of the light-concentrating unit 12 is not necessarily on the first surface 111. Due to the light concentration caused by the light-concentration unit 12, the temperature of the first surface 111 is obviously higher than that of the second surface 112 on which the light is not concentrated. Based on Seebeck effect, the thermoelectric unit 11 can generate current according to the temperature difference. Furthermore, the thermoelectric generating module 1 includes a plurality of wires W that are electrically connected with the anode and cathode of the thermoelectric unit 11 respectively to transmit the power to external apparatuses.
As shown in
As shown in
As shown in
As shown in
The light-concentrating structure 121 here is a Fresnel lens for example. The light-concentrating structures 121 can be integrally formed as one piece. Otherwise, the light-concentrating unit 12d can be divided into a plurality of pieces that are disposed corresponding to the thermoelectric units 11 respectively to concentrate the light on the thermoelectric units 11 respectively.
In summary, in the thermoelectric generating module of the invention, the light-concentrating unit concentrates the light on the thermoelectric unit, so that the thermal energy of the light can be concentrated on the thermoelectric unit, and thereby the efficiency of power generation of the thermoelectric generating module can be enhanced. In addition, in a preferred embodiment, the thermoelectric generating module can further include a heat-dissipating unit that can increase the temperature difference between two sides of the thermoelectric unit so as to enhance the efficiency of power generation.
Although the invention has been described with reference to specific embodiments, this description is not meant to be construed in a limiting sense. Various modifications of the disclosed embodiments, as well as alternative embodiments, will be apparent to persons skilled in the art. It is, therefore, contemplated that the appended claims will cover all modifications that fall within the true scope of the invention.
Number | Date | Country | Kind |
---|---|---|---|
099112923 | Apr 2010 | TW | national |