TWI540298B - High temperature and high efficiency solar thermal receiver - Google Patents

Description

High temperature resistant high efficiency solar heat receiver

The invention relates to the technical field of solar receivers, in particular to providing a high-temperature-resistant high-efficiency solar heat receiver, wherein the light is concentrated and reflected in the solar radiation receiving cavity through the dish-type solar concentrating unit to transmit high temperature selectivity. The absorbing membrane conducts thermal energy to the porous heat exchanger, and the fluid is taken away by the fluid and fully utilized.

The earth's energy is depleting, so it is imperative to develop alternative energy and renewable resources. The energy generated by solar energy has little impact on environmental pollution and has one of the renewable energy sources that are sustainable.

At present, the most basic way of using solar energy is to illuminate the lens with a larger amount of light energy to increase the power generation efficiency. The sunlight is concentrated by the Fresnel lens and can be concentrated into a transparent light guide column with a shape similar to the inverted pyramid. The main function of the optical device is to homogenize the energy of the spot light focused by the Fresnel lens; if it is directly irradiated to the solar cell without homogenizing the homogenizer, the energy is too concentrated, which will reduce the photothermographic energy conversion efficiency.

Nowadays, the installation of the homogenizer is often done by manpower. Based on the functional requirements, the structure of the homogenizer is top-heavy, and only a layer of glue is bonded between the homogenizer and the solar cell, so the support strength is insufficient, and it is easy to tilt or even peel off. Seriously affect the reliability of the homogenizer; in addition, the bonding between the homogenizer and the concentrating solar receiver is just the light gathering place, and the temperature is the highest. If the bonding adhesive is softened by heat, the weight of the homogenizer will not be supported. Cause the homogenizer to tilt; some are light Although the device is designed with a supporting structure, the purpose is to make the incident light totally reflected on the four sides of the glass. When the glass is stained with dust, water drops, etc., the efficiency and heat conversion efficiency of the homogenizer will be greatly reduced; Function and reliability.

Therefore, in view of the problems of the above-mentioned conventional solar receivers, an innovative invention technology that is reliable and can improve the heat-efficiency of the heat-receiving efficiency is developed, and the innovative invention technology that meets the practicality and reduces the energy loss is practically used by consumers. In view of this, the inventors have been engaged in the manufacturing development and design experience of related products for many years. After detailed design and careful evaluation, the above objectives are finally achieved. The invention is practical.

In view of the above problems, the present invention applies a high temperature resistant high efficiency solar heat receiver, which mainly comprises: a dish concentrating unit and a solar receiving unit, wherein the solar receiving unit comprises: a high thermal conductivity a ceramic, an adiabatic ceramic layer, a porous heat exchanger; the high thermal conductivity ceramic is a hollow cylinder with a single side opening that is gradually widened downward, and a radiation receiving cavity is disposed in the hollow cylinder body, the radiation receiving cavity is below the cavity A quartz glass cover is disposed at the opening, and a high temperature selective absorbing film is further fixed on the top surface of the inner surface of the radiation receiving cavity.

Wherein, the surface of the high thermal conductive ceramic is provided with the heat insulating ceramic layer to reduce heat loss, and the heat conducting fin column is arranged at the top to improve heat exchange efficiency.

Wherein, the high temperature selective absorption film can be fixed on all inner surfaces of the radiation receiving cavity.

The porous heat exchanger is fixed on the top of the high thermal conductivity ceramic; in addition, the dish concentrating unit is a parabolic type and has an open upward structure, and the solar receiving unit is disposed on a focus position above the dish concentrating unit; after the sunlight is reflected by the dish concentrating unit into the radiation receiving cavity of the high thermal conductivity ceramic, energy is transmitted to the porous heat through the high temperature selective absorbing film An exchanger; wherein the porous heat exchanger has a first-class outlet at one end and a first-class inlet at the opposite end, and the outlet is parallel to the inlet; the inlet is at a lower end and enters a predetermined fluid, flowing through the porous The heat exchanger transfers heat energy to the fluid, and the fluid is led out at the high-end outlet to enable the heat energy to be fully collected and utilized, such as thermal power generation, thermal energy cooling, baking, sterilization, greenhouse and desalination. .

The techniques, means and functions of the present invention will be described in detail with reference to the drawings and drawings, and will enable the reviewing committee to have a more detailed understanding of the present invention and to familiarize themselves with the The present invention can be implemented by the following, and the following is merely to explain the preferred embodiment and not to limit the scope of the present invention, and thus any form of alteration of the creation of the present invention based on the inventive spirit of the present invention. Or modifications are intended to be within the scope of the invention.

10‧‧‧High thermal conductivity ceramics

11‧‧‧Quartz glass cover

12‧‧‧radiation receiving cavity

13‧‧‧High temperature selective absorption film

14‧‧‧thermal fins

15‧‧‧Insulating ceramic layer

20‧‧‧Porous heat exchanger

21‧‧‧Inlet

22‧‧‧Exit

40‧‧‧Disc concentrating unit

50‧‧‧Solar receiving unit

Fig. 1 is a schematic view showing the overall appearance of an embodiment of the present invention.

Fig. 2 is a partially enlarged cross-sectional view showing an embodiment of the present invention.

Fig. 3 is a schematic view showing the operation of a partially enlarged section of the embodiment of the present invention.

In order to provide a better understanding and understanding of the features and the efficacies of the present invention, the preferred embodiment and the detailed description are as follows: First, refer to Figures 1 to 3, The invention provides a high temperature resistant high efficiency solar heat receiver, comprising: a dish concentrating unit 40 and a solar receiving unit 50, The solar energy receiving unit 50 includes: a high thermal conductivity ceramic 10, an adiabatic ceramic layer 15, and a porous heat exchanger 20; the high thermal conductivity ceramic 10 is a hollow cylinder with a single side opening that is gradually widened downward, and is at the top of the outer surface. The heat-transfer fin 14 is provided, and inside the high-heat-conductive ceramic 10 is a radiation receiving cavity 12, a quartz glass cover 11 is disposed at the opening below the radiation receiving cavity 12, and a high-temperature selective absorption film 13 is further fixed. At the top of the inner surface of the radiation receiving cavity 12.

The porous heat exchanger 20 is fixed to each of the heat-transfer fins 14 on the top of the high-heat-conductive ceramics 10, and the energy absorbed by the high-temperature selective absorption film 13 is transmitted to the porous heat exchanger via the heat-transfer fins 14 . 20; wherein the porous heat exchanger 20 has a first-class inlet 21 at one end and a first-class outlet 22 at the opposite end, and the outlet 22 is parallel to the inlet 21; wherein, the high thermal conductivity ceramic 10 The surface of the insulating ceramic layer 15 serves to reduce the loss of thermal energy to the atmosphere.

The high temperature selective absorption film 13 can be fixed to the entire inner surface of the radiation receiving cavity 12.

Finally, the dish concentrating unit 40 is of a parabolic type and has an upward opening structure, and the solar receiving unit 50 is disposed at a focus position above the dish concentrating unit 40.

In operation, after the sunlight is irradiated to the dish concentrating unit 40, the light is reflected into the radiation receiving cavity 12 in the high thermal conductivity ceramic 10, and the high thermal conductive ceramic 10 is transmitted through the high temperature selective absorbing film 13. Each of the heat transfer fins 14 is conducted upward into the porous heat exchanger 20; the high temperature selective absorption film 13 can increase the radiant energy absorption amount to reduce the heat radiation loss, and the quartz glass is disposed at the opening of the radiation receiving cavity 12. a cover 11 to avoid energy loss caused by heat convection in the radiation receiving cavity 12; in addition, the heat insulating ceramic layer 15 on the outer surface prevents the heat receiving cavity 12 from being dissipated into the atmosphere; When the thermal energy is in the porous heat exchanger 20, the inflow port 21 at the lower end is introduced into a predetermined fluid (not shown), and the fluid may be water or other liquid having good endothermic characteristics, and the fluid enters. The porous heat exchanger 20 absorbs thermal energy into the fluid, and enters the porous heat exchanger 20 to absorb thermal energy, and then the fluid outlet 22 guides the fluid after absorbing thermal energy, and then the internal heat energy of the fluid is sufficient. Collecting and utilizing, such as: thermal power generation, thermal refrigeration, baking, sterilization, greenhouse and desalination, etc.; the industry that needs to use thermal energy can achieve the goal of application by the invention.

In summary, the present invention has the above-mentioned numerous efficiencies and practical values, and can effectively improve the overall economic efficiency. Therefore, the present invention is indeed an innovative invention, which can reduce heat radiation and heat convection energy at low cost. Loss, increase the light absorption rate, reduce the light reflection and use the characteristics of high temperature resistance and high conductivity; and the same or similar products are not used publicly in the same field technology, which should meet the requirements of the invention patent, and apply according to law, and Please give the invention patent.

10‧‧‧High thermal conductivity ceramics

11‧‧‧Quartz glass cover

12‧‧‧radiation receiving cavity

13‧‧‧High temperature selective absorption film

14‧‧‧thermal fins

15‧‧‧Insulating ceramic layer

20‧‧‧Porous heat exchanger

21‧‧‧Inlet

22‧‧‧Exit

50‧‧‧Solar receiving unit

Claims (4)

A high-temperature-resistant high-efficiency solar heat receiver comprising: a solar energy receiving unit comprising: a high thermal conductivity ceramic, an insulating ceramic layer, and a porous heat exchanger; wherein the high thermal conductivity ceramic is unilaterally widened downwardly a hollow cylinder, and a plurality of heat-transfer fins are arranged on the top of the outer surface, and the outer surface of the high-heat-conductive ceramic is the heat-insulating ceramic layer, and the inside is a radiation receiving cavity, and a high-temperature selectivity is fixed on the top surface of the radiation receiving cavity An absorbing film; and a quartz glass cover is fixed at an opening below the radiation receiving cavity; the porous heat exchanger is fixed on each of the heat conducting fins on the top of the outer surface of the high thermal conductive ceramic, and the high temperature selective absorbing film is disposed The absorbed heat energy is transferred to the porous heat exchanger via each of the heat-transfer fins, wherein the porous heat exchanger has a first-class inlet at one end and a first-class outlet at the opposite end, and the outlet is parallel to the inlet and outlet. . The high temperature resistant high efficiency solar heat receiver according to claim 1, wherein the high temperature selective absorption film is fixed to all inner surfaces of the radiation receiving cavity. The high-temperature-resistant high-efficiency solar thermal receiver according to claim 1, wherein the preset position below the solar receiving unit is provided with a dish concentrating unit, which is parabolic and has an upward opening. A high-temperature-resistant high-efficiency solar heat receiver according to claim 1, wherein a fluid having good heat absorption is introduced from the inlet.