KR20030028869A - Double vacuum tube type solar collector using ample and thermal expansion absorbing apparatus - Google Patents

Abstract

PURPOSE: A double vacuum tube type solar collector is provided to minimize thermal resistance and prevent thermal shock, while preventing the overall system from being influenced by the breakage of heat collector tube. CONSTITUTION: A plurality of amples(1,1') are accommodated into a heat collector tube(46), and the heat collector tube is filled with an anti-freeze liquid(2). The gap formed between an outer tube(45) and the heat collector tube is vacuumed. A thermal expansion absorbing device(6) having an air vent hole(5) is inserted into a guide groove formed at an upper cap(3) protruded from the top of the heat collector tube, so that the air vent hole of the thermal expansion absorbing device corresponds to a cap air vent hole(3a) formed at the upper cap. The upper cap has a mesh net(7) arranged at the bottom of the upper cap so as to prevent the amples from moving up to the upper cap when the anti-freeze liquid is heated. The protruded upper cap is inserted into a heat accumulator or a pipe of heat exchanger.

Description

Double vacuum tube type solar collector using ample and thermal expansion absorbing apparatus}

The present invention is a dual vacuum tube type solar collector using an ampoule and a thermal expansion absorber for effectively utilizing the thermal performance of solar heat as a solar collector and providing economic efficiency and convenience of solar heat use. More specifically, the present invention relates to the use of the ampoules by filling a plurality of ampoules between the outer tube and the heat collecting tube into the inner side of the vacuumed glass double tube to fill the antifreeze. It is inserted in accordance with the ventilation hole and sealed at the bottom with a top stopper formed with a mesh to insert the protruding plug into the heat storage tank and the heat exchanger pipe to maximize the heat collection effect of solar heat.

In general, a solar collector for using solar heat is classified into two types, a flat panel and a vacuum tube solar collector, in consideration of its external structure and applicability.

The most widely used flat panel solar collector is configured in the form of a rectangular flat plate, and a heat collecting plate having a special chemical treatment on the surface of the thin metal plate made of copper or aluminum to absorb as much as possible the sun as shown in FIG. 31) was formed and welded to the surface of one side of the heat collecting plate 31, a plurality of thin paper tubes 32 (32 ') of the same material at regular intervals, inserted into a rectangular frame and covered with a transparent cover.

In the flat solar collector P as described above, a solar heat beam primarily heats the heat collecting plate 31, and a heat transfer medium (or water) transfers heat energy from the heated heat collecting plate 31 to the inside of the branch pipes 32 and 32 ′. Receives to join in the main building 33 of the upper flows to the heat storage tank 34 or heat exchanger.

The plate-type collector P may be used by directly heating water in the collector, but in an area where the cold weather is present, an antifreeze is used as a heat medium rather than water, and the antifreeze heated while passing through the collector heats the water secondarily. It is applied.

The flat plate collector P mainly uses solar heat of a low temperature range, that is, 80 ° C. or less, and heat loss from the heat collecting plate 31 to the outside due to convection from the heat collecting plate 31 is large. There was a problem such as low heat collection efficiency to about 50%.

And the vacuum tube solar collector (V) has a glass tube shape and is able to block the heat loss due to convection by vacuuming the closed space in contact with the solar heat collector surface, Figure 4 (a), (b) As in, there is a method using one glass tube and two glass tubes in the form of a double vacuum tube.

In the method of using one glass tube, the heat pipe 42 having the heat pipe 42 mounted therein is inserted into the glass tube 41, and the heat pipe 42 protrudes from the upper end of the glass tube 41. In the metal stopper 44 is sealed and the inside is vacuumed to block the annual loss of solar heat collected from the surface of the heat collecting plate 43 to the outside by convection.

Vacuum tube solar collector (V) of the type described above requires a fairly complicated process due to the glass and metal bonding problem in sealing the upper end of the glass tube 41 with a metal stopper 44, resulting in durability And economics.

In addition, the vacuum tube-type solar collector (V), which uses two glass tubes in the form of a double vacuum tube, is a glass double tube vacuum-treated between the outer tube 45 and a special surface-treated collector tube 46 for solar heat collection. To form a heat medium (liquid, water, etc.) inside the heat collecting tube 46 and seal the upper portion of the double tube with a heat insulating plug 47 to heat the heat medium filled inside the heat collecting tube 46 to circulate heat energy. The vacuum between the outer tube 45 and the collecting tube 46 was vacuumed to block heat loss to the outside due to convection of air.

The above method does not have a problem in the production of the collector body, but if the heating medium (water) is filled directly into the heat collecting tube 46 and heated, if the water suddenly flows into the heat collecting tube 46 heated by the winter heat and cold weather and solar heat There is a problem that the heat collecting phenomenon of the heat collecting tube 46 is damaged due to thermal stress, and the material of the outer tube 45 and the heat collecting tube 46 is made of glass and is directly connected to the heat storage tank. If there is a risk that water in the heat storage tank leaks into the broken tube.

In addition, a heat collecting device such as a heat pipe may be mounted inside the heat collecting tube 46 as shown in FIG. 4A, but in this case, heat energy is retained from the heat collecting surface (inner side of the heat collecting tube 46) to the heat transfer device. When the collection surface and the heat transfer device is not in perfect contact with the heat resistance occurs and there was a problem that the heat collection efficiency is lowered.

In order to secure the above problems, the solar heat is collected by using a glass double tube as in the case of FIG. 5 (a) (b) (c).

In the case of (a) of FIG. 5, the fully glass evacuated solar collector V composed of an outer tube 45 and a collecting tube 46 is heated by directly filling the collecting tube 46 with water, and (b) (c). The copper plate 48 is rolled into the collecting tube 46 to be in close contact with the inner surface of the collecting tube 46, and then the “U” shaped copper pipe 42 ′ or the heat pipe 42 is inserted into the collecting tube 46. The method of sandwiching between the used copper plates 48 is applied.

The method of (a) has a functional and design problem having the same problem as that of FIG. 4 (b), and the method of inserting the copper plate 48 as shown in (b) (c) is manufactured with the complexity of using a system. There is a problem that an increase in cost and an increase in heat resistance due to a poor contact between the copper plate 48 and the "U" copper pipe 42 'or the heat pipe 42 and the resulting heat collection efficiency are lowered (a). Since the method directly heats the water in the collecting tube 46, the heat capacity of the water is large, so the size of the collecting tube 46 is increased so that the collection area cannot be expanded.

Therefore, the present invention has been created for the purpose of solving the conventional problems as described above, there is no need to separately manufacture the heat pipe, copper plate and the "U" shaped copper tube, and heat the antifreeze directly from the heat collecting tube to minimize the thermal resistance and heat medium Phosphorus antifreeze and the fluid (water, etc.) to use solar energy are separated and thermal shock does not occur, and even if the collection tube is damaged, a large number of ampoules are inserted inside the system and the amount of antifreeze is adjusted. It is to provide a flexible double vacuum tube solar collector which can vary the system design specification for heating temperature and heat response of heating medium as well as the solar heat collecting area of the collecting tube as needed.

In order to provide the above double vacuum tube solar collector, a solar collector using a glass double tube which is vacuum-treated between the outer tube and the black-colored collecting tube toward the outer tube, inserts a plurality of ampoules into the inside of the collecting tube to fill the antifreeze solution. At the top, insert the thermal expansion absorber with perforated holes in the guide groove of the plug in line with the plug vent.The bottom is sealed with the top stopper with a mesh, and the stopper protruding about 10cm is inserted into the pipe of the heat storage tank and heat exchanger. Will be able to provide a device that can maximize the heat collection effect.

1 is an exploded perspective view showing the overall structure of the present invention;

2 is a cross-sectional structural view of the present invention

3 is a structural diagram of a conventional flat solar collector

Figure 4 (a) is a structural diagram of a conventional single vacuum tube solar collector

(b) is a structural diagram of a conventional double vacuum tube solar collector

Figure 5 (a) (b) (c) is a structural diagram of a double vacuum tube solar collector using a heat pipe

<Description of the symbols for the main parts of the drawings>

(1) (1 ') ampoule (2) Antifreeze

(3) upper plug (3a) plug vent

(4) Guide groove (5) Thermal expansion absorber vent

(6) Thermal expansion absorbers (7) mesh

(45) Outer Tube (46) Collecting Tube

Hereinafter, the configuration and operation of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 is an exploded perspective view showing the entire structure of the present invention showing a state in which the double tube, the thermal expansion absorber, the ampoule and the upper plug is separated, Figure 2 is a full cross-sectional structural diagram of the present invention the ampoule in the double vacuum tube solar collector The cross section of the inserted and coupled thermal expansion absorber is shown.

In the solar heat collector using a glass double tube vacuum-treated between the outer tube 45 and the collecting tube 46 painted black on the outer tube 45 side,

Thermal expansion in which a plurality of ampoules (1) (1 ') are inserted into the collecting tube (46) of the double pipe and the antifreeze (2) is filled and the vent hole (5) is perforated in the guide groove (4) of the stopper (3) at the top. The absorber 6 is inserted into the plug vent hole 3a and sealed with an upper plug 3 having a mesh 7 formed at the bottom thereof. The protruding plug is inserted into a pipe of a heat storage tank and a heat exchanger.

In the present invention as described above, when solar energy is irradiated to the black-colored collecting tube 46 through the outer tube 45 during the sunshine time, the collecting tube 46 is heated, thereby transferring heat energy to the inner antifreeze 2. When the antifreeze (2) is heated to move to the top of the collecting tube 46, and the temperature of the total antifreeze (2) by natural circulation increases, the volume is expanded to increase the pressure in the collecting tube 46, this pressure is It is delivered to the thermal expansion absorber 6 placed in the guide groove 4 of the upper cap 3, the thermal expansion absorber 6 is immediately compressed to absorb it to prevent excessive pressure rise in the heat collecting tube 46. The pressure in the thermal expansion absorber (6) is always at atmospheric pressure, which means that the air in the thermal expansion absorber (6) and the plug (3) vents (5) even if the air therein is heated and expanded during solar heat collection or contracted upon cooling the collector. ) (3a) When the pressure in the collecting tube 46 increases, the thermal expansion absorber 6 contracts and absorbs it. If the pressure in the collecting tube 46 decreases after sunset, the thermal expansion absorber 6 again. Will return to its original state.

On the other hand, the heated antifreeze (2) of the inner top of the heat collecting tube 46 is to transfer the heat energy to the fluid (water, etc.) in the heat storage tank or the pipe of the heat exchanger through the outside of the protruding stopper (3).

And the ampoule (1) (1 ') inserted into the collecting tube 46 to adjust the amount of the antifreeze (2) to be filled to improve the heat collection effect of the solar heat, and the inserted ampoules (1) (1') It is made of glass and air is contained therein. When the antifreeze 2 is heated, some of them may move upward in the heat collecting tube 46, but may be closed by a net 7 installed at the bottom of the upper plug 3. It does not rise to the protruding part of 3) and the stopper 3 is installed to protrude about 10 cm above the height of the collecting tube 46 to facilitate insertion and insertion into the pipe of the heat storage tank and the heat exchanger.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

Therefore, the present invention does not need to separately manufacture heat pipes, copper plates, and "U" shaped copper pipes mounted in a conventional solar collector, and heats the antifreeze directly from the collecting tube to minimize thermal resistance, and utilizes a heat medium antifreeze and solar energy. Heat shock does not occur due to separation of the fluid (water, etc.) and the collecting tube is damaged, and it does not affect the whole system. In addition to the castle, it has the effect of having the elasticity to change the system design specifications for adjusting the solar heat collecting area of the heat collecting tube as needed.

Claims (1)

In the solar heat collector using a glass double tube vacuum-treated between the outer tube 45 and the collecting tube 46 painted black on the outer tube 45 side, Thermal expansion in which a plurality of ampoules (1) (1 ') are inserted into the collecting tube (46) of the double pipe and the antifreeze (2) is filled and the vent hole (5) is perforated in the guide groove (4) of the stopper (3) at the top. It is characterized in that the absorber 6 is inserted in accord with the plug vent hole 3a and sealed at the bottom with an upper plug 3 having a mesh 7 formed therein so as to insert the protruding plug into the pipe of the heat storage tank and the heat exchanger. Double tube type solar collector using ampoule and thermal expansion absorber.