KR200438722Y1 - Heat Exchanger for Solar Condensing Module - Google Patents

Abstract

The present invention relates to a heat exchanger for a solar light collecting module using heat energy of the transmitted sunlight after transmitting the collected solar light to the optical fiber.

The solar heat collecting module heat exchanger of the present invention comprises: a housing (21) having a coupling hole (H) through which an end of an optical fiber (F) through which solar light focused on a bottom surface is transmitted is inserted; A heat insulating member 22 surrounding the inner surface or the outer surface of the housing 21 except the coupling hole H; A heat absorbing body 23 installed on the bottom surface of the housing 21 centering on the coupling hole H and having a through hole H 'coinciding with the coupling hole H; Closely wound on the outer circumferential surface of the heat absorber 23, the both ends are composed of a heat exchange pipe 24 extending through the housing 21 to the outside.

The heat exchanger for solar condensing module of the present invention has a low energy loss because it can be used in a place where thermal energy is to be used after transferring the condensed solar light using an optical fiber, and is a direct medium using heat energy absorbed by a heat absorber. Because of the heating, there is an advantage that can maximize the energy efficiency.

Solar light, condensing, optical fiber, heat absorber, heat exchange pipe, insulation, vacuum

Description

Heat exchanger for solar condensing module {Heat transducer for solar concentrator module}

1 is a perspective view of a conventional solar light collecting module.

Figure 2 is a perspective view of a heat exchanger for solar concentrating module of the present invention.

Figure 3 is a cross-sectional view of the subject innovation heat exchanger.

Figure 4 is a partial cutaway perspective view of the subject innovation heat exchanger.

5 is a cross-sectional view of an embodiment of a housing of the present invention heat exchanger.

Figure 6 is a cross-sectional view of another embodiment of a housing of the present invention heat exchanger.

       ((Explanation of symbols for main part of drawing))

21. Housing 22. Insulation member 23. Heat absorber

24. Heat Exchanger Pipe

H. Hole H '. Through

The present invention does not convert solar light into thermal energy inside the module for condensing sunlight, and transmits the collected solar light to the optical fiber, and then absorbs the thermal energy of the transmitted sunlight to directly heat a medium such as air or water. The present invention relates to a heat exchanger for a solar light collecting module that can reduce energy loss of converted thermal energy and heat various media with the converted thermal energy.

The sun is an effective heat absorber of 5762K. The sun's surface emits energy of 6.25 × 107 W / ㎡, and the expansion angle between the earth and the sun has 0.27 °, so the amount of insolation reaching outside the Earth's atmosphere is about 1370 W / ㎡. The amount of direct solar radiation reaching the earth is about 800-1000 W / m2.

Since the energy density is too low to use such solar energy as it is, in order to obtain a high temperature from the solar energy, the density of the solar energy must be increased by collecting the low-density sunlight by tracking the position of the sun.

The condensing method of solar light can be classified into two methods, linear condensing and point condensing according to the condensed form of solar light. Condensing device for the high condensing angle with the most efficient condensing angle of the sun during the year As a method of tracking the sun only along one axis of east-west along the azimuth angle of the sun with a fixed angle of, the representative device is a Parabolic Trough Concentrator type condenser.

Point condensing is a two-axis solar tracking device that accurately tracks the altitude and azimuth of the sun at the same time, such as dish type, power tower type, heliostat type, and solar furnace.

The solar light collected by the conventional solar light collecting devices as described above is converted into electrical energy through initial thermal energy to chemical energy in the collector, or transmitted after thermal conversion in the collector, so that a large-scale solar absorber is integrated into the collector. Had to be installed.

However, when the solar heat absorber is installed in the light collector and is thermally converted, the opening surface of the absorber to which the collected solar light is irradiated may not only cause an increase in heat loss due to the error of the light collecting device, but also be converted through the absorber. There is a problem that the energy loss in the process of transmitting the thermal energy is increased because the transmitted thermal energy.

Therefore, the absorber and the heat conversion device built in the light collecting device are separated to simplify the light collecting device. In the light collecting device, only the solar light is collected, and the collected solar energy is transmitted to the absorber and the heat conversion device which are separated to the outside through the optical fiber. The method has been proposed, looking at the "photovoltaic condensing module" of the domestic patent registration No. 10-0420868 discloses an example as follows.

The solar collector module includes: a casing (11) comprising a base plate and sidewalls vertically erected along its periphery; A plurality of small dish type primary reflectors 12 which are densely arranged two-dimensionally in the casing 11; A transparent glass cover 13 for sealing an upper portion of the casing 11 to prevent contamination of reflective surfaces of the primary reflectors 12; A plurality of secondary reflectors (not shown) provided on the bottom surface of the transparent glass cover 13 at points corresponding directly to the center points of the primary reflectors 12; After passing through the center point of the base plate 11 and each of the primary reflectors 12 from the outside of the base plate of the casing 11, one end thereof is directly below the secondary reflectors provided on the bottom surface of the transparent glass cover 13. It is composed of an optical fiber (F) for receiving the sunlight reflected over the secondary and positioned in the absorber 14 provided at the other end of the optical fiber (F).

The solar light collecting module transmits the collected solar light to the optical fiber F while the solar light incident and reflected by the plurality of dish-type primary reflectors 12 is incident and reflected by the secondary reflector. In (14), it is a structure for thermal conversion.

However, as described above, in the related art, only intensive development of the module for condensing sunlight has been made, and development of an absorber or a heat exchanger is insufficient in order to more efficiently heat convert the collected and transmitted sunlight.

The present invention was devised to solve all the problems of the conventional solar light collecting module and the absorber and heat exchanger of the concentrated solar light, and the solar light collected and transmitted to the optical fiber is emitted to the heat absorber mounted inside the heat insulating space to heat An object of the present invention is to provide a heat exchanger for a solar light collecting module capable of heating an absorber and directly heating a medium by using the heat of the heated heat absorber.

The object of the present invention is achieved by a heat absorber for absorbing heat of sunlight transmitted to an optical fiber, and a housing for insulating the heat absorber from the outside.

The heat exchanger for solar condensing module of the present invention condenses solar light incident by a reflector or the like and radiates solar light transmitted to an optical fiber to a heat absorber having a high thermal energy absorption rate and heats the heat absorber, thereby heating the medium from the heated heat absorber. It can be directly heated.

That is, the heat exchanger for a solar light collecting module of the present invention, which is connected to the optical fiber of the solar light collecting module for transmitting the concentrated solar light to the optical fiber, the hermetic enclosure housing in which the end of the optical fiber is inserted through one side; A heat insulating member provided on the inner or outer surface of the housing; A heat absorber having a lower end opening, the lower end being tightly coupled to a bottom inner surface of the housing; It is composed of a heat exchange pipe which is penetrated from the outside of the housing to the inside of the heat absorber and then wound from the lower end of the heat absorber to the outside of the housing. Each component is as follows.

The housing has a structure such as a rectangular parallelepiped, a cylindrical shape or a spherical shape, and is made of a material of high rigidity such as metal or ceramic, and is not only resistant to heat and external shock, but also to pressure inside and outside the housing in which the inside is in a vacuum state. It is good to be able to withstand the car.

At this time, sealing the inside of the housing in a vacuum state is to prevent heat loss caused by heat release and heat exchange due to air convection.

The optical fiber end of the solar light collecting module is inserted into the bottom surface of the housing so that the light collected and transmitted is emitted into the housing through the optical fiber.

At this time, the optical fiber is a coupling hole is formed in the bottom surface of the housing in order to penetrate the bottom of the housing, the inner periphery of the coupling hole so that the housing can be sealed even when the end of the optical fiber is inserted through the coupling hole It is desirable to make it adhere to the outer peripheral edge of the additional optical fiber.

The heat insulating member is provided on the inner and outer surfaces of the housing to prevent heat from dissipating to the outside, and may be made of various materials such as asbestos, glass, fiber, cork, etc. It is good to protect the housing consists of.

The heat absorber is a housing having a lower end when opened in the longitudinal direction, and the open end is closely coupled to the inner surface of the bottom of the housing. At this time, the end of the optical fiber inserted and coupled to penetrate the bottom of the housing is opened. By being coupled to be located within the portion, all of the sunlight transmitted through the optical fiber end can be emitted inside the heat absorber.

That is, the solar light transmitted through the optical fiber end is diverted to the inner space of the heat absorber, and the heat absorber made of a material having a high heat absorption rate absorbs the heat energy of the emitted solar light and becomes a high temperature state.

At this time, the heat absorber is preferably made of a semi-dome like a sphere, egg-shaped or cup upside down having a circular or oval cross-sectional shape so as to absorb heat evenly by sunlight emitted from the optical fiber, that is, the heat absorber It is preferable that the entire surface of the body be composed of a curved surface.

As described above, in order to efficiently absorb the heat energy of the emitted solar light, the heat absorber is preferably made of a black body that completely absorbs all the radiant solar light and has a significantly low reflectance, but in reality there is no perfect black body. Produced by platinum black or the like, or coating a metal, such as copper, black paint, fabric, synthetic resin and the like with excellent heat absorption.

In this case, a predetermined amount of sunlight may be emitted to the outside of the heat absorber through the opening of the heat absorber, or sunlight may pass through the heat absorber, and thus, a reflector may be formed on the inner surface of the housing to absorb heat energy of the emitted sunlight again. It is good to have.

The reflector may reflect both the heat and the light to reflect the sunlight emitted from the heat absorber and return to the heat absorber, or to reflect the sunlight and heat passing through the heat absorber back to the heat absorber. It is desirable to have.

The heat exchange pipe is a tube which is penetrated from the outside to the inside of the housing and then wound from the lower end to the upper end of the heat absorber to the outside of the housing, and the portion wrapped around the heat absorber is in close contact with the outer circumferential surface of the heat absorber to absorb the heat absorber. It is configured to receive a row directly.

That is, when a medium such as air or water is introduced through the heat exchange pipe, the medium flowing along the pipe passes through a portion wound around the outer circumferential surface of the heat absorber and flows out along the pipe while receiving heat energy from the heat absorber. Bar, it is possible to directly apply the heat energy to the medium to increase the use efficiency of the heat energy.

The details of the purpose and technical constitution according to the present invention, including the effect thereof, will be clearly understood by the following description with reference to the drawings showing preferred embodiments of the present invention.

2 is a perspective view of the heat exchanger for solar concentrating module of the present invention, a cross-sectional view of the heat exchanger of the present invention in FIG. 3, and a partially cutaway perspective view of the heat exchanger of the present invention, in FIG. 6 is a cross-sectional view of another embodiment of the housing of the present invention heat exchanger.

As shown, the heat exchanger for the solar light collecting module of the present invention is connected to the optical fiber of the solar light collecting module for transferring the light collected by a reflector or the like to the optical fiber,

A housing 21 having a coupling hole H through which an end portion of the optical fiber F is inserted through a central portion of the bottom surface;

A heat insulating member 22 surrounding the inner or outer surface of the housing 21 except for the coupling hole H;

A heat absorbing body 23 installed on the bottom surface of the housing 21 centering on the coupling hole H and having a through hole H 'coinciding with the coupling hole H;

Closely wound on the outer circumferential surface of the heat absorber 23, both ends are composed of a heat exchange pipe 24 extending through the housing 21 to the outside.

At this time, the inside of the housing 21 by maintaining a vacuum state, it is good to prevent heat release and heat exchange by air, bar through the coupling hole (F) and the coupling hole (F) of the housing 21 To be tightly coupled to the optical fiber (F).

The heat insulating member 22 may be provided on only one surface of the inner surface or the outer surface of the housing 21, or may be provided on both the inner and outer surfaces thereof, and the inside of the housing 21 may have a high temperature by the heat absorber 23. In order to maintain the bar, it is preferable that the heat insulating member 22 is provided on the outer surface including the inner surface or the inner surface of the housing 21 so that the housing 21 is not directly heated from a high temperature.

The through hole H 'formed at the lower end of the heat absorber 23 is a portion through which the end portion of the optical fiber F passing through the coupling hole H of the housing 21 is inserted. And the diameter is configured to be equal to or larger than the diameter of the coupling hole (H).

The heat absorber 23 is absorbed and heated to absorb sunlight, and is preferably made of a material close to a black body such as platinum black in order to absorb sunlight efficiently, but completely absorbs all the radiant solar light and has no reflectance. Since it is practically difficult to fabricate a black body, in order to reflect the sunlight passing through the heat absorber 23 back to the heat absorber 23, the heat absorber 23 is spaced apart from the heat absorber 23 in the housing 21. It is desirable to have a reflector 25 that encloses 23.

That is, a part of the sunlight radiated into the heat absorber 23 is transmitted to the outside of the heat absorber 23, so that the transmitted sunlight is reflected and transferred back to the heat absorber 23, the heat absorber 23 It will be able to absorb the sunlight as much as possible to increase the efficiency.

The heat exchange pipe 24 has a structure in which both ends thereof penetrate the housing 21, and a central portion excluding both ends winds the outer circumferential surface of the heat absorber 23.

At this time, the center portion of the heat exchange pipe 24, that is, the portion winding from the lower end portion to the upper end portion of the outer circumferential surface of the heat absorber 23, is wound in close contact with the outer circumferential surface of the heat absorber 23, thereby directly transferring the heat of the heat absorber 23. It is preferable to receive the heat, and the heat absorber 23 may be made of a metal having high thermal conductivity and excellent heat resistance for efficient heat transfer to the medium flowing in the pipe as well as being efficiently transmitted.

In the heat exchange pipe 24 as described above, a medium such as air or water introduced through one end of the pipe flows along a pipe wound around the outer circumferential surface of the heat absorber 23 and receives heat from the pipe. As it flows out to the other end, the medium receives heat energy directly from the heat absorber 23 that absorbs heat energy of sunlight.

At this time, by making the heat absorber 23 into a spherical or oval shape having a circular or elliptical cross section, the length of the pipe wound around the outer circumferential surface of the heat absorber 23 is increased so that the medium flowing in the pipe is heat energy for a long time. Not only can be delivered, it is good to ensure that the light emitted from the optical fiber is evenly distributed to the heat absorber (23).

In addition, in order to maintain the vacuum state of the housing 21, when air is introduced into the housing 21, an air outlet 26 for releasing the introduced air may be additionally formed.

In addition, it is also desirable to additionally provide an aperture at the end side of the optical fiber (F), due to the seasonal characteristics of the country, the use of only a certain amount of sunlight in the summer using the aperture in the summer with a large amount of irradiation and a small amount of irradiation. In winter, the aperture can be opened to use all the sunlight.

At this time, even during the day, the irradiation amount of sunlight is different, it is possible to adjust the amount of sunlight by adjusting the aperture as needed.

As described above, the solar light collected through the optical fiber F is not only adjustable using an aperture, but also adjustable using the optical fiber F, in the through hole H ′ of one heat absorber 23. By inserting through a plurality of optical fibers (F) it can be made to emit a greater amount of sunlight at once.

In addition, by connecting large and small heat absorbers 23 to each of the plurality of optical fibers F, it is also possible to convert the collected solar light into a large amount of thermal energy at the same time, or to simultaneously use each of the heat absorbers 23 for various purposes. .

As described above, the heat exchanger for the solar light collecting module of the present invention does not convert and transmit the collected solar light into thermal energy, but transfers the collected solar light using an optical fiber and then heats it at the place where the thermal energy is to be used. Since energy is absorbed by the absorber and used as heat energy immediately, energy loss is low, and since the medium is directly heated by using the heat energy absorbed by the heat absorber, there is an advantage of maximizing energy efficiency.

In addition, since the collected solar light is transmitted to the optical fiber, the installation location is free.

Claims (4)

In the heat exchanger for a solar light collecting module that absorbs the solar light collected by a reflector and the like transmitted to the optical fiber as thermal energy, A housing 21 having a coupling hole H through which an end portion of the optical fiber F is inserted through a central portion of the bottom surface; A heat insulating member 22 surrounding the inner or outer surface of the housing 21 except for the coupling hole H; A heat absorbing body 23 installed on the bottom surface of the housing 21 centering on the coupling hole H and having a through hole H 'coinciding with the coupling hole H; Heat-exchanging module for a solar condensing module, characterized in that it comprises a heat-exchanging pipe (24) closely wound on the outer circumferential surface of the heat absorber (23), both ends penetrate through the housing (21). The heat exchanger for solar light collecting module, characterized in that the housing 21 is provided with a reflector 25 surrounding the heat absorber 23 in a state away from the heat absorber 23. The method of claim 1, The heat absorber (23) is a heat exchanger module for a solar light collecting module, characterized in that consisting of any one of a spherical, egg-shaped, dome-shaped having a circular or elliptical cross section. The method of claim 1, A heat exchanger for solar light collecting module, characterized in that an aperture is additionally provided at the end side of the optical fiber (F) passing through the housing (21).

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