CN110890864A - A high-efficiency solar power generation heat collection and radiant cooling parabolic device - Google Patents

Abstract

The invention discloses a parabolic device for high-efficiency solar power generation, heat collection and radiation cooling, comprising a parabolic box, a selectively permeable membrane, a first photovoltaic cell, a first heat collector plate, a microchannel heat exchange component, a collector tube, the second heat collector plate, the second photovoltaic cell, the air flow channel and the parabolic reflective layer, the selective transmission membrane is arranged on the top of the box, and the selective transmission membrane is arranged on the lower surface of the selective transmission membrane a photovoltaic cell. Beneficial effect: When making cold air mode at night, close the water inlet and outlet, open the air inlet and outlet, the hot air enters the air flow channel from the air inlet, and a part of the hot air directly conducts radiation heat exchange with outer space to transfer the heat It is transmitted to the atmosphere and outer space, and another part of the hot air projects the emitted infrared band radiant heat to the parabolic reflective layer and then reflects it to outer space for radiative cooling. device or place.

Description

A high-efficiency solar power generation heat collection and radiant cooling parabolic device

technical field

The invention relates to the field of solar energy, in particular to a parabolic device for high-efficiency solar power generation, heat collection and radiation cooling.

Background technique

In recent years, the comprehensive utilization of solar photovoltaic (PV/T) technology has received extensive attention and research due to its good comprehensive utilization efficiency of solar photovoltaics. The PV/T system effectively improves the comprehensive utilization efficiency of photovoltaic light and heat per unit area; on the other hand, the lower temperature heat transfer medium flows through the heat collector plate to take away heat, reducing the temperature of the heat collector plate and photovoltaic cells, thereby The photovoltaic efficiency is improved, but the existing PVT can only generate electricity and heat during the day and be idle at night, and the radiant cooling device can only perform cooling at night and be idle during the day.

For the problems in the related technologies, no effective solutions have been proposed so far.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a high-efficiency solar power generation heat collection and radiant cooling parabolic device to solve the problems raised in the above background technology.

To achieve the above object, the present invention provides the following technical solutions:

A parabolic device for high-efficiency solar power generation heat collection and radiation cooling, comprising a parabolic box, a selective permeable membrane, a first photovoltaic cell, a first heat collector plate, a microchannel heat exchange component, a header, a second a heat collector plate, a second photovoltaic cell, an air flow channel and a parabolic reflection layer, the selective transmission film is arranged on the top of the box body, and the first photovoltaic cell is arranged on the lower surface of the selective transmission membrane, The first heat collector plate is arranged on the lower surface of the first photovoltaic cell, the microchannel heat exchange component is arranged on the lower surface of the first heat collector plate, and the two ends of the microchannel heat exchange component are respectively connected with the The headers are connected, one end of one of the headers protrudes out of the box to form a water inlet, and one end of the other header extends out of the box to form a water outlet. The second heat collecting plate is disposed on the lower surface of the microchannel heat exchange assembly, the second photovoltaic cell is disposed on the lower surface of the second heat collecting plate, and the parabolic reflective layer is disposed in the box body, An air flow channel for the interior of the box is formed between the upper surface of the parabolic reflective layer and the lower surface of the second photovoltaic cell, and both ends of the air flow channel are respectively provided with an air inlet and an air outlet. Both the air outlet and the air outlet are arranged on the side wall of the box body, and the space between the lower part of the parabolic reflective layer and the bottom of the box body and the inner wall around the box body are provided with a thermal insulation layer.

Further, both the air inlet and the air outlet are arranged on the side wall of the box.

Further, the space between the lower part of the parabolic reflective layer and the bottom of the box body and the inner side walls around the box body are also provided with a thermal insulation layer.

Further, the upper surface of the box body is rectangular, the periphery and the bottom are surrounded by a paraboloid, and the paraboloid is semi-elliptical.

Further, the parabolic reflective layer is a parabolic surface, and the parabolic surface of the parabolic reflective layer is a semi-elliptical shape.

Further, the parabolic reflection layer is made of a high-reflection mirror aluminum plate.

Further, the first photovoltaic cell and the second photovoltaic cell are thin-film solar cells, and the materials of the first heat collecting plate and the second heat collecting plate are both aluminum plates.

Further, exchanges between the selective transmission film and the first photovoltaic cell, between the first photovoltaic cell and the first heat collecting plate, and between the first heat collecting plate and the microchannel are exchanged. The heat components, between the microchannel heat exchange component and the second heat collecting plate, and between the second heat collecting plate and the second photovoltaic cell are tightly bonded by hot melt adhesive.

Further, the thermal insulation material of the thermal insulation layer is phenolic foam.

Further, the micro-channel heat exchange component is a flat tube with a close-packed structure of several micro-channels and an equivalent channel diameter of 10-1000 μm.

Compared with the prior art, the present invention has the following beneficial effects:

In the mode of making hot water during the day, open the water inlet and outlet, close the air inlet and outlet, the first heat collecting plate absorbs the solar radiation energy facing the sky, and the second heat collecting plate absorbs the reflection from the parabolic reflective layer. The cold water enters the micro-channel heat exchange component from the water inlet to absorb the heat obtained by the first heat collecting plate and the second heat collecting plate from the solar radiation energy, and the heated hot water flows out from the water outlet. At the same time, the first photovoltaic cell absorbs the solar radiation energy of the part facing the sky, the second photovoltaic cell absorbs the solar radiation energy reflected from the parabolic reflective layer, and the first photovoltaic cell and the second photovoltaic cell absorb part of the solar radiation. The radiant energy is converted into electrical energy output;

When making hot air mode during the day, close the water inlet and outlet, open the air inlet and air outlet, and the cold air enters the air flow channel from the air inlet, and absorbs the solar heat from the part facing the sky and the reflected light from the parabolic reflective layer. Solar heat, the heated hot air flows out from the air outlet and is sent to the device or place that needs hot air. At the same time, the first photovoltaic cell absorbs the solar radiation energy facing the sky, and the second photovoltaic cell absorbs the reflection from the parabolic reflective layer. The solar radiation energy, the first photovoltaic cell and the second photovoltaic cell convert part of the solar radiation energy into electrical energy output;

When making cold water at night, open the water inlet and outlet, close the air inlet and outlet, and the hot water enters the microchannel heat exchange component from the water inlet to transfer the heat to the first and second collector plates, cooling The last cold water flows out from the water outlet and enters the device or place that needs to provide cold water. The first heat collecting plate directly conducts radiation heat exchange with outer space, and transfers the heat to the atmosphere and outer space. The second heat collecting plate will emit the infrared band. The radiant heat is projected to the parabolic reflective layer and then reflected to outer space for radiative cooling;

When making cold air at night, close the water inlet and outlet, open the air inlet and outlet, and the hot air enters the air flow channel from the air inlet, and a part of the hot air directly conducts radiation heat exchange with outer space, transferring the heat to the atmosphere and outer space, another part of the hot air projects the emitted infrared band radiant heat to the parabolic reflection layer and then reflects it to outer space for radiative cooling. The cooled cold air flows out from the air outlet and is sent to the device or place that needs cold air. .

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some of the present invention. In the embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

1 is a schematic main diagram of the structure of a parabolic device for high-efficiency solar power generation heat collection and radiation cooling according to an embodiment of the present invention;

FIG. 2 is a cross-sectional sectional view of the main diagram according to the structural schematic diagram of FIG. 1 .

Reference number:

1. Box body; 2. First photovoltaic cell; 3. Micro-channel heat exchange assembly; 4. Second photovoltaic cell; 5. Water inlet; 6. Water outlet; 7. Air inlet; 8. Air outlet; 9. Air 10. The first heat collecting plate; 11. The second heat collecting plate; 12. The selective transmission film; 13. The parabolic reflection layer;

Detailed ways

Below, in conjunction with the accompanying drawings and specific embodiments, the invention is further described:

In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments may be combined with each other in the case of no conflict.

Many specific details are set forth in the following description to facilitate a full understanding of the present invention, however, the present invention may also be implemented in other ways than those described herein, and therefore, the present invention is not limited to the specific embodiments disclosed in the following description. limit.

Example 1:

Please refer to FIGS. 1-2 , according to an embodiment of the present invention, a parabolic device for high-efficiency solar power generation, heat collection and radiant cooling includes a parabolic box 1 , a selective transmission film 12 , a first photovoltaic cell 2 , and a first photovoltaic cell 2 . A heat collector plate 10, a microchannel heat exchange assembly 3, a header (not shown in the figure), a second heat collector plate 11, a second photovoltaic cell 4, an air flow channel 9, a parabolic reflective layer 13 and a thermal insulation layer 14, all of which are The top of the box body 1 is provided with the selective transmission film 12 , the lower surface of the selective transmission film 12 is provided with the first photovoltaic cell 2 , and the lower surface of the first photovoltaic cell 2 is provided with the first photovoltaic cell 2 . The heat collecting plate 10, the microchannel heat exchange assembly 3 is disposed on the lower surface of the first heat collecting plate 10, and the two ends of the microchannel heat exchange assembly 3 are respectively communicated with the headers, and one of the One end of the header protrudes out of the box 1 to form a water inlet 5, and one end of the other header protrudes out of the box 1 to form a water outlet 6. The microchannel heat exchange assembly The lower surface of 3 is provided with the second heat collecting plate 11 , the lower surface of the second heat collecting plate 11 is provided with the second photovoltaic cell 4 , and the parabolic reflection layer 13 is provided in the box body 1 , between the upper surface of the parabolic reflective layer 13 and the lower surface of the second photovoltaic cell 4, an air flow channel 9 for the interior of the box 1 is formed, and the two ends of the air flow channel 9 are respectively provided with air inlets 7 And the air outlet 8, the air inlet 7 and the air outlet 8 are both arranged on the side wall of the box 1, the space between the lower part of the parabolic reflective layer 13 and the bottom of the box 1 and the A thermal insulation layer 14 is arranged on the inner side walls around the box body 1 .

Embodiment 2:

Please refer to FIG. 1-2 , for the box 1, the upper surface of the box 1 is rectangular, and the periphery and the bottom are surrounded by a paraboloid, and the paraboloid is semi-elliptical.

Through the above scheme of the present invention, the beneficial effects are as follows: the upper surface of the box body 1 is rectangular, and the periphery and the bottom are surrounded by a paraboloid, and the paraboloid is semi-elliptical, which is arranged to better absorb sunlight.

Embodiment three:

Please refer to FIG. 2 , for the parabolic reflective layer 13 , the parabolic reflective layer 13 is a parabolic surface, the parabolic surface of the parabolic reflective layer 13 is a semi-elliptical shape, and the parabolic reflective layer 13 is made of a high-reflection mirror aluminum plate .

Embodiment 4:

1-2, for the first photovoltaic cell 2, the first photovoltaic cell 2 and the second photovoltaic cell 4 are thin film solar cells, the first heat collector 10 and the second collector The material of the hot plate 11 is all aluminum plate.

Through the above solution of the present invention, the beneficial effects are as follows: the thin film solar cell has good stability, good radiation resistance and low cost, thus reducing the overall cost of the device.

Embodiment 5:

Referring to FIGS. 1-2 , for the selective transmission film 12 , between the selective transmission film 12 and the first photovoltaic cell 2 , between the first photovoltaic cell 2 and the first heat collector between the plates 10, between the first heat collecting plate 10 and the microchannel heat exchange assembly 3, between the microchannel heat exchange assembly 3 and the second heat collecting plate 11, and between the second heat collecting plate 11 and the second heat collecting plate 11. The hot plate 11 and the second photovoltaic cell 4 are tightly bonded by hot melt adhesive.

Embodiment 6:

Please refer to FIG. 2 , for the thermal insulation layer 14, the thermal insulation material of the thermal insulation layer 14 is phenolic foam, and the micro-channel heat exchange assembly 3 is a micro-channel heat exchange assembly 3 having a close-packed structure of several fine flow channels and an equivalent channel diameter of 10-1000 μm. flat tube.

Through the above solutions of the present invention, the beneficial effects are as follows: the thermal insulation material of the thermal insulation layer 14 is phenolic foam, and the most prominent advantages are fire prevention and thermal insulation, thus improving the safe usability of the device.

In order to facilitate the understanding of the above-mentioned technical solutions of the present invention, the working principle or operation mode of the present invention in the actual process is described in detail below:

In practical application, in the mode of making hot water during the day, open the water inlet 5 and the water outlet 6, close the air inlet 7 and the air outlet 8, the first heat collecting plate 10 absorbs the solar radiation energy facing the sky, the second The heat collecting plate 11 absorbs the solar radiation energy reflected from the parabolic reflective layer 13, and the cold water enters the microchannel heat exchange assembly 3 from the water inlet 5 to absorb the solar radiation energy obtained by the first heat collecting plate 10 and the second heat collecting plate 11. Heat, the heated hot water flows out from the water outlet 6 and enters the device or place that needs to provide hot water. At the same time, the first photovoltaic cell 2 absorbs the solar radiation energy facing the sky, and the second photovoltaic cell 4 absorbs from the parabolic reflective layer. 13 The reflected solar radiation energy, the first photovoltaic cell 2 and the second photovoltaic cell 4 convert part of the solar radiation energy into electrical energy output;

When making hot air mode during the day, close the water inlet 5 and the water outlet 6, open the air inlet 7 and the air outlet 8, and the cold air enters the air flow channel 9 from the air inlet 7, and absorbs the solar heat and heat from the part facing the sky at the same time. The solar heat reflected from the parabolic reflective layer 13, the heated hot air flows out from the air outlet 8 and is sent to the device or place that needs hot air. At the same time, the first photovoltaic cell 2 absorbs the solar radiation energy facing the sky, Two photovoltaic cells 4 absorb the solar radiation energy reflected from the parabolic reflective layer 13, and the first photovoltaic cell 2 and the second photovoltaic cell 4 convert part of the solar radiation energy into electrical energy output;

When making cold water at night, open the water inlet 5 and the water outlet 6, close the air inlet 7 and the air outlet 8, the hot water enters the microchannel heat exchange component 3 from the water inlet 5 and transfers the heat to the first heat collecting plate 10 and In the second heat collecting plate 11, the cooled cold water flows out from the water outlet 6 and enters the device or place that needs to provide cold water. The first heat collecting plate 10 directly conducts radiation heat exchange with outer space, and transfers the heat to the atmosphere and outer space, The second heat collecting plate 11 projects the emitted infrared band radiant heat to the parabolic reflective layer 13 and then reflects it to outer space for radiative cooling;

When making cold air at night, close the water inlet 5 and the water outlet 6, open the air inlet 7 and the air outlet 8, the hot air enters the air channel 9 from the air inlet 7, and a part of the hot air directly conducts radiation heat exchange with outer space , transfer the heat to the atmosphere and outer space, and another part of the hot air projects the emitted infrared band radiant heat to the parabolic reflector layer 13 and then reflects it to outer space for radiation cooling. The cooled cold air flows out from the air outlet 8 and sends into a device or place that requires cold air.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, and substitutions can be made in these embodiments without departing from the principle and spirit of the invention and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (10)

1. The efficient solar power generation heat collection and radiation refrigeration paraboloid device is characterized by comprising a paraboloid box body (1), a selective transmission membrane (12), a first photovoltaic cell (2), a first heat collection plate (10), a micro-channel heat exchange assembly (3), a collecting pipe, a second heat collection plate (11), a second photovoltaic cell (4), an air flow channel (9) and a paraboloid reflection layer (13), wherein the selective transmission membrane (12) is arranged at the top of the box body (1), the first photovoltaic cell (2) is arranged on the lower surface of the selective transmission membrane (12), the first heat collection plate (10) is arranged on the lower surface of the first photovoltaic cell (2), the micro-channel heat exchange assembly (3) is arranged on the lower surface of the first heat collection plate (10), and two ends of the micro-channel heat exchange assembly (3) are respectively communicated with the collecting pipe, one end of one of the collecting pipes extends out of the box body (1) to form a water inlet (5), one end of the other collecting pipe extends out of the box body (1) to form a water outlet (6), the second heat collecting plate (11) is arranged on the lower surface of the micro-channel heat exchange assembly (3), the second photovoltaic cell (4) is arranged on the lower surface of the second heat collecting plate (11), the parabolic reflecting layer (13) is arranged in the box body (1), an air flow channel (9) used for the interior of the box body (1) is formed between the upper surface of the parabolic reflecting layer (13) and the lower surface of the second photovoltaic cell (4), and an air inlet (7) and an air outlet (8) are respectively arranged at two ends of the air flow channel (9).

2. An efficient solar heat collection and radiation refrigeration parabolic device according to claim 1, wherein the air inlet (7) and the air outlet (8) are both arranged on the side wall of the box body (1).

3. The parabolic device for efficient solar power generation and heat collection and radiation refrigeration as claimed in claim 1, wherein the space between the lower part of the parabolic reflecting layer (13) and the bottom of the box body (1) and the inner side wall of the periphery of the box body (1) are further provided with insulating layers (14).

4. The parabolic device for high-efficiency solar power generation and heat collection and radiation refrigeration as claimed in claim 1, wherein the upper surface of the box body (1) is rectangular, the periphery and the bottom of the box body enclose a parabolic shape, and the parabolic shape is semi-elliptical.

5. The parabolic device for solar heat collection and radiant cooling with high efficiency as claimed in claim 1, wherein the parabolic reflector (13) is parabolic and the parabolic reflector (13) is semi-elliptical.

6. An efficient solar heat collection and radiant cooling parabolic device as claimed in claim 1, wherein the parabolic reflector (13) is made of high reflective mirror aluminum sheet.

7. The parabolic device for high efficiency solar power generation heat collection and radiant cooling as claimed in claim 1, wherein the first photovoltaic cell (2) and the second photovoltaic cell (4) are thin film solar cells, and the first heat collection plate (10) and the second heat collection plate (11) are made of aluminum plates.

8. The parabolic device for efficient solar power generation and heat collection and radiant cooling as claimed in claim 1, wherein the selective transmission membrane (12) and the first photovoltaic cell (2), the first photovoltaic cell (2) and the first heat collection plate (10), the first heat collection plate (10) and the micro-channel heat exchange assembly (3), the micro-channel heat exchange assembly (3) and the second heat collection plate (11), and the second heat collection plate (11) and the second photovoltaic cell (4) are tightly combined through hot melt adhesive.

9. The parabolic device for high efficiency solar power generation heat collection and radiation refrigeration as claimed in claim 1, wherein the heat insulation material of the heat insulation layer (14) is phenolic foam.

10. The parabolic device for high-efficiency solar power generation and heat collection and radiation refrigeration as claimed in claim 1, wherein the micro-channel heat exchange assembly (3) is a flat tube with a plurality of fine flow channels in a close-packed structure and equivalent diameter of the channels being 10-1000 μm.

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