KR20100014203A - Horizontal multi-tube type solar collector - Google Patents

Abstract

PURPOSE: A horizontal multi-tube solar collector is provided to improve heat collection efficiency by heating a thermal medium with solar heat concentratively while the thermal medium is passing through heat collecting copper pipes. CONSTITUTION: A horizontal multi-tube solar collector comprises a case(2), a solar heat reflector(4), a horizontal multi-tube type heat collecting pipe(5), a diaphragm(7a) for flow path formation, and a tempered glass plate(10). The case is of a square box form in which a heat insulator is installed. The solar heat reflector is attached to the surface of the heat insulator in the case. The horizontal multi-tube type heat collecting pipe includes a thermal medium circulating pipe(6) with both ends closed, a thermal medium oil pipe(7) with both ends open, and a plurality of heat collecting copper pipes(8) which are horizontally installed between the thermal medium circulating pipe and the thermal medium oil pipe. The diaphragm for flow path formation is fixed in the middle portion of the thermal medium oil pipe to form a U-shaped flow path in the heat collecting copper pipes. The tempered glass plate is installed on the top of the case to form an air layer inside the case.

Description

Horizontal multi-tube solar collector {Horizontal multi-tube type solar collector}

The present invention relates to a horizontal multi-pipe solar heat collecting device, and more particularly, the heat medium filled in the horizontal multi-pipe heat collecting pipe is directly irradiated directly from the sun while passing through a plurality of heat collecting copper tubes forming a U-shaped flow path in a horizontal direction. Intensive heating is achieved by intensive heating by the solar heat reflected by the solar heat reflector and the solar reflector, and the compact structure is not only restricted by the installation location but also the roof of the building or the roof of the house as well as the veranda of the apartment. The present invention relates to a horizontal multi-pipe solar collector which can be easily installed even in a narrow installation area.

In general, solar energy refers to radiant energy in the form of heat and light from the sun that energizes the earth's climate and supports the life of living creatures. The solar energy is the most abundant energy among various energy sources, such as heating, cooling, and power generation. It is used as a circle.

Conventional solar heat collectors that intend to use such solar energy as an energy source such as heating are mainly configured to circulate water after raising the temperature of water or heat medium by using solar heat. Conventional solar heat collectors that heat and circulate them to be used for heating have to be equipped with a number of devices, including a device that can circulate water or a heat medium while maintaining a closed state, so the structure is very complicated and expensive. There was a problem.

In addition, the devices that want to heat water or heat medium to use as energy, the flow rate is reduced by the gas generated inside the panel filled with water or heat medium, resulting in non-uniform flow or pressure drop, etc. As the circulation is reduced and the circulation capacity of the fluid is reduced, there is a problem that the efficiency is significantly reduced.

On the other hand, conventional solar collectors are configured such that the heat collecting tube is installed in the vertical direction so that the water or heat medium filled in the heat collecting tube can be circulated by convection. Conventional solar collectors can be installed on the roof of a building or a roof of a detached house where a sufficient height for construction is secured as it is made vertically, but in places where a sufficient height for construction such as an apartment's veranda is not secured. Since it is impossible to install, there was a problem that the installation place is restricted.

Therefore, as the spread of apartments expands, there is an urgent need for the development of compact solar collectors that can be easily installed in places where the installation area is narrow, such as the roof of a building or the roof of a house, as well as a balcony of an apartment. .

The present invention is to solve the above problems, the case is provided with a rectangular box-shaped case in which the heat insulating material is installed on the inner surface and the solar reflector is installed on the surface of the heat insulating material installed on the inner surface of the case and both ends are provided inside the case. A horizontal multi-pipe collection pipe configured to be installed in parallel in the horizontal direction between the closed heat medium circulation pipe and the heat medium outflow pipe having both ends opened is fixedly installed, and the heat medium outflow pipe of the horizontal multi-pipe heat collecting pipe is stopped. The part is fixed to the flow path forming diaphragm for forming a U-shaped flow path in the interior of the plurality of heat collecting copper tubes, and the upper part of the case is configured to be provided with a tempered glass plate to form an air layer inside the case, horizontal multi-pipe type The heat medium filled inside the heat collecting tube is used to collect a plurality of heat collecting copper tubes that form a U-shaped flow path. It is concentrated not only by the solar heat irradiated directly from the sun while passing in the horizontal direction, but also by the solar heat reflected by the solar reflector. It is a technical problem to make it easy to install in places where the installation area is narrow, such as not only a roof of a house, but also a veranda of an apartment.

The present invention for achieving the above technical problem is provided with a case having a box-shaped case in which the heat insulating material is installed on the inner surface, the surface of the heat insulating material installed on the inner surface of the case is provided with a solar reflector plate, both ends of the inside of the case The horizontal multi-pipe heat collecting tube is configured to be installed in parallel between the heat medium circulation pipe is closed and the heat medium flow inlet pipe with both ends open in a horizontal direction, and the heat medium flow pipe of the horizontal multi-pipe heat collecting pipe The stop portion of the plurality of heat collecting copper pipes for forming a U-shaped flow path for fixing the inside of the copper pipe is installed, the upper part of the case is characterized in that the tempered glass plate is formed to form an air layer inside the case do.

In addition, the present invention is characterized in that the heat medium is filled in the interior of the horizontal multi-pipe collector pipe is configured to mix 30 to 60% by weight of propylene glycol and 40 to 70% by weight of water.

In addition, the present invention is characterized in that the solar selective absorption film is formed on the surface of the horizontal multi-pipe collector tube.

In addition, the present invention is characterized in that the solar reflector is in the form of a thin aluminum plate.

In addition, the present invention is characterized in that the tempered glass plate is made of low iron tempered glass.

The horizontal multi-pipe solar heat collector according to the present invention configured as described above is directly irradiated directly from the sun while the heat medium filled in the horizontal multi-pipe heat collecting pipe passes through a plurality of heat collecting copper tubes forming a U-shaped flow path in a horizontal direction. Intensive heating is achieved by intensive heating by the solar heat reflected by the solar heat reflector and the solar reflector, and it is not only limited to the installation location but also the roof of the building and the roof of the house as well as the veranda of the apartment. In addition, there is an effect that can be easily installed even in a small installation area.

Hereinafter, the present invention will be described in detail with reference to FIGS. 1 to 5 to achieve the above object.

1 is an explanatory view showing a state of use of the horizontal multi-pipe solar heat collector according to the present invention, Figure 2 is an exploded perspective view showing the configuration of the horizontal multi-pipe solar heat collector according to the present invention, Figure 3 is AA of FIG. 4 is a cross-sectional view taken along line BB of FIG. 1, and FIG. 5 is an explanatory diagram showing a heat medium circulation process inside a horizontal multi-pipe solar heat collector according to the present invention.

Horizontal multi-pipe solar heat collector according to the present invention is provided with a rectangular housing case 2 is provided with a heat insulating material (3) on the inner side as shown in Figs.

At this time, the case 2 is preferably formed of an aluminum material having a thickness of 3 ~ 4mm to facilitate handling and installation.

In addition, as the thermal insulation material 3 installed on the inner surface of the case 2, glass wool or a hard urethane thermal insulation material which is widely used as a building insulation material is used. When using the glass wool, a thickness of about 50 mm should be formed to have a predetermined thermal insulation effect. On the other hand, in the case of using a rigid urethane thermal insulation material, even if it is formed to a thickness of about 25mm, which is half of the glass wool, it can achieve a predetermined thermal insulation effect, as well as radiate heat blocking function and heat resistance that can block radiant heat as well. And it can be equipped with a flame retardant function, sound insulation function, moisture-proof layer function. Therefore, in order to make the solar heat collector 1 according to the present invention more compact and slim, it is preferable to use a rigid urethane thermal insulation.

In addition, a solar reflector 4 is provided on the surface of the heat insulating material 3 provided on the inner surface of the case 2, and it is preferable to use an aluminum thin plate having a thickness of about 80 μm as the solar reflector 4. Do.

At this time, the solar reflector 4 reflects the sunlight passing through the horizontal shell tube 5 to heat the rear portion of the horizontal shell tube 5 to further improve the heat collection efficiency. do.

In addition, a plurality of heat collecting copper tubes 8 are arranged in parallel in the horizontal direction between the heat medium circulation pipe 6 in which both ends are closed and the heat medium flow pipe 7 in which both ends are opened. Horizontal multi-pipe heat collecting pipe (5) is fixedly installed.

In addition, the inside of the horizontal multi-tubular heat collecting tube (5) is filled with a heat medium for transmitting solar heat, such heat medium is used as an automotive antifreeze 30 ~ 60 having a freeze protection function, corrosion prevention function, foam prevention function It is preferable to use a heat medium configured to mix 40% by weight of propylene glycol with 40% by weight of water.

At this time, the reason for limiting the mixing ratio of propylene glycol and water constituting the heat medium to 30 to 60% by weight of propylene glycol and 40 to 70% by weight of water is to increase the ratio of propylene glycol to 60% by weight or more and 40% by weight of water. If the ratio is lower than%, the efficiency of heat transfer is insignificant compared to the increase in manufacturing cost. Therefore, the effectiveness is lowered. If the ratio of propylene glycol is lowered to 30% by weight or less and the ratio of water to 70% by weight or more is reduced, the corrosion protection is deteriorated. This is because the durability of the heat collecting tube is significantly reduced.

In addition, it is preferable to coat the solar selective heat absorption film 5a on the surface of the horizontal multi-pipe heat collecting tube 5 as shown in FIGS. 3 and 4.

At this time, the solar selective heat absorbing film (5a) is formed on the surface of the horizontal multi-pipe collector 5 to induce an effective photothermal conversion of the solar energy to enhance the solar spectrum absorption function of the surface of the collector tube By minimizing thermal loss due to re-radiation, it plays a role of securing high absorption rate up to 95% and low emissivity of 5%. Such solar selective absorption film 5a has black chromium and black nickel with infrared emission less than 10%. , Copper oxide and the like are used.

For reference, the wavelength of the infrared portion of the sunlight is generated by the vibration movement when heat is absorbed by the metal or other objects. Therefore, the key issue of solar technology is to increase the absorption rate of light of solar wavelengths and to process the surface in a special way so that the wavelength of infrared part is not emitted.

Generally, black chromium, black nickle, copper oxide, etc. are coated on metal surface to make infrared emissivity less than 10%. It is called selective absorption film, and it is made by applying special paint to make infrared emissivity 10 ~ 30%. It is called a film, and a general black paint is applied to make infrared emissivity more than 50%.

In addition, the plurality of heat collecting copper tubes 8 constituting the horizontal multi-pipe heat collecting tube 5 have a large heat transfer effect, strong corrosion resistance to the heat medium to be used therein, and excellent ductility, 8 mm in diameter and thickness. It is preferable to use a copper tube of 0.76 mm.

In addition, a flow path forming diaphragm 7a is fixedly installed at the stop portion of the heat medium flow-out tube 7 of the horizontal multi-pipe heat collecting tube 5.

At this time, the flow path forming diaphragm 7a fixed to the middle portion of the heat medium flow-out tube 7 of the horizontal multi-pipe heat collecting tube 5 has a plurality of heat collecting copper tubes 8 as shown in FIG. 5. In order to form a U-shaped flow path (5b) in the interior of the U-shaped flow path (5b) is formed in the interior of the plurality of heat collecting copper tubes (8) by the flow path forming diaphragm (7a) as described above Since the heat medium filled in the heat collecting tube 5 can contact the plurality of heat collecting copper tubes 8 over a longer time while passing through the U-shaped flow passage 5b, the heat collecting efficiency can be further improved. .

And, the upper part of the case 2 is provided with a tempered glass plate 10 to form an air layer 9 inside the case (2).

At this time, as the tempered glass plate 10, it is preferable to use a low iron tempered glass plate which reduces the content of iron, which is an impurity contained in the glass, to improve solar transmittance.

The low iron tempered glass plate used as the tempered glass plate 10 is the low iron glass is reduced to less than 150ppm iron content by heat treatment to maximize the transmittance and condensation of solar light and minimize the reflectance and at the same time reach 2.5 times of ordinary glass It is manufactured to have strength, and is mainly used as a substrate of a photovoltaic module panel.

Referring to the functional relationship of the horizontal multi-pipe solar heat collector according to the present invention configured as described above are as follows.

The horizontal multi-pipe solar heat collector according to the present invention has a compact structure and can be easily installed in a place having a narrow installation area such as a roof of a building or a roof of a house as well as a veranda of an apartment without being restricted by an installation place.

After the horizontal multi-tubular solar heat collector 1 according to the present invention is installed on the roof of a building, the roof of a house, the veranda of an apartment, or the like, as shown in FIG. 1, the heat medium leaking out of the case 2 is shown. The heat medium circulation pipe 20 is connected to both ends of the inlet pipe 7, and the pipe 20 connected to the upper end of the heat medium outflow pipe 7, that is, the heat medium flows out, stores the heat storage tank 23. The pipe 20 is connected to one end of the coil-type heat exchanger 21 installed inside the pipe 20 connected to the lower end of the heat medium inflow pipe 7, that is, to the part through which the heat medium flows, through the circulation pump 22. It is connected to the other end of the furnace coil type heat exchange part (21).

Subsequently, the horizontal installed in the horizontal multi-tubular solar heat collector 1 through a valve (not shown) installed on one side of the pipe 20 connected between the horizontal multi-tubular solar heat collector 1 and the heat storage tank 23. When the heat medium is filled in the multi-pipe heat collecting tube 5 and the pipe 20 and the coil type heat exchange part 21, the installation work is completed.

When the solar light shines on the horizontal multi-tubular solar collector 1 according to the present invention installed as described above, the horizontal multi-tubular house installed inside the case 2 of the solar collector 1 by radiant heat of the sun. The heat pipe 5 starts to heat up.

At this time, the horizontal multi-pipe heat collecting pipe (5) installed in the case (2) is a plurality of heat collecting copper pipe (8) installed in the horizontal direction between the heat medium circulation pipe (6) and the heat medium flow pipe (7) Direct heating by the solar heat irradiated from the solar heat reflected by the solar reflector and the heat can be heated even more efficiently.

In addition, the horizontal multi-pipe collector 5 is heated by the solar selective absorbing film 5a formed on the surface thereof to increase the solar absorption rate and significantly lower the infrared emission rate, thereby enabling heating more efficiently.

In addition, the horizontal multi-pipe heat collecting tube (5) is formed inside the case (2) by the heat insulating material (3) installed on the inner surface of the case (2) and the tempered glass plate 10 installed on the case (2) As the heat retention state is maintained by the air layer 9, the heat can be heated even more efficiently.

In this way, when the horizontal multi-tubular heat collecting pipe 5 installed inside the case 2 of the solar heat collecting device 1 is heated by the sun's radiant heat, the power is supplied to the circulation pump 22 to be operated. The heat pipe filled in the horizontal multi-pipe heat collecting pipe 5 and the pipe 20 and the coil-type heat exchanger 21 installed inside the multi-pipe solar heat collector 1 is circulated. It heats through primary and secondary by solar heat, passing through the U-shaped flow path 5b formed in the inside of the heat collecting copper tube 8.

That is, the heat medium flows into the lower portion of the heat medium inflow pipe 7 with the stop portion closed by the flow path forming diaphragm 7a, as shown in FIG. After the first heating while moving to the heat medium circulation tube (6) through a plurality of heat collecting copper pipe (8) arranged in a plurality of heat collecting copper pipe arranged in a horizontal direction on top of the horizontal multi-pipe collector pipe (5) Through (8), it is heated secondary by moving to the upper part of the heat medium flow pipe 7 with the interruption | block part closed by the flow path forming diaphragm 7a.

In this way, the heat medium passing through the horizontal multi-pipe heat collecting pipe 5 is directly irradiated directly from the sun while passing through the plurality of heat collecting copper pipes 8 forming the U-shaped flow path 5b in the horizontal direction for the first and second times. Solar heat and solar heat reflected by the solar reflector are heated over a longer period of time, allowing for higher temperatures.

Subsequently, the heat medium heated to a high temperature while passing through the horizontal multi-pipe heat collecting pipe 5 is moved to the coil-type heat exchanger 21 installed inside the heat storage tank 23 through the pipe 20 to the heat storage tank 23. After the heat is transferred to the water stored therein, the circulation is repeated again through the circulation pump 22 and into the horizontal multi-pipe collector 5 of the solar heat collector 1.

As such, when the water stored in the heat storage tank 23 is heated above a predetermined temperature according to the circulation of the heat medium, the hot water of the heat storage tank 23 is directly drawn out or used to circulate through the heating pipe to heat the indoor space. It becomes usable.

As described above, the horizontal multi-pipe solar heat collector according to the present invention has a plurality of heat collecting copper tubes 8 in which the heat medium filled in the horizontal multi-pipe heat collecting pipe 5 forms a U-shaped flow path 5b. Intensive heating by solar heat reflected directly from the sun and solar heat reflecting from the solar reflector while not only improves the efficiency of heat collection, but it is also a compact structure that is not restricted by the installation location. In addition to the roof, it can be easily installed in places where the installation area is narrow, such as a veranda of an apartment.

1 is an explanatory view showing a state of use of the horizontal multi-pipe solar heat collector according to the present invention.

Figure 2 is an exploded perspective view showing the configuration of a horizontal multi-pipe solar heat collector according to the present invention.

3 is a cross-sectional view taken along the line A-A of FIG.

4 is a cross-sectional view taken along the line B-B in FIG.

5 is an explanatory view showing the heat medium circulation process inside the horizontal multi-pipe solar heat collector according to the present invention.

<Explanation of symbols for main parts of drawing>

1: solar heat collector 2: case

3: heat insulating material 4: solar reflector

5: horizontal multi-pipe collector 5a: solar selective absorption membrane

5b: U-shaped flow path 6: heat medium circulation tube

7: Heat medium outflow pipe 8: Copper pipe for heat collection

9: air layer 10: tempered glass plate

Claims (5)

The inner case is provided with a case 2 of a rectangular box shape in which the heat insulating material (3) is installed, On the surface of the heat insulating material 3 provided on the inner side of the case 2, a solar reflector plate 4 is installed, Inside the case 2, a plurality of heat collecting copper tubes 8 are horizontally arranged in parallel in a horizontal direction between the heat medium circulation pipe 6 with both ends closed and the heat medium outflow pipe 7 with both ends open. Tubular heat collecting pipe (5) is fixedly installed, A flow path forming diaphragm 7a for forming a U-shaped flow path 5b inside the plurality of heat collecting copper pipes 8 is fixed to the stop portion of the heat medium flow-out pipe 7 of the horizontal multi-pipe heat collecting pipe 5. Installed, Horizontal multi-tubular solar heat collecting device, characterized in that the upper part of the case 2 is provided with a tempered glass plate 10 to form an air layer (9) inside the case (2). The horizontal multi-pipe solar cell according to claim 1, wherein the heat medium filled in the horizontal multi-pipe heat collecting pipe 5 is configured to mix 30 to 60% by weight of propylene glycol and 40 to 70% by weight of water. Collector. The horizontal multi-pipe solar collector according to claim 1 or 2, wherein a solar selective heat absorption membrane (5a) is formed on the surface of the horizontal multi-pipe collector tube (5). 4. The horizontal multi-pipe solar collector according to claim 3, wherein the solar reflector is in the form of an aluminum sheet. The horizontal multi-tubular solar heat collecting device according to claim 4, wherein the tempered glass plate (10) is made of low iron tempered glass.

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