KR100337747B1 - Heat pipe type solar collector using EPDM tube - Google Patents

Abstract

The present invention relates to a heat pipe-type solar heat collecting plate using an EPDM tube, the purpose of which is to increase the number of heat pipes inserted into the heat collecting plate of the same size to increase the thermal efficiency per unit area, to absorb the radiant energy of the sun without the absorber, The present invention provides a solar heat collecting plate capable of installing more heat pipes per unit area than a conventional solar heat collecting plate by inserting EPDM, which is a polymer compound outside the pipe.

The constitution of the present invention is a solar water heater including a hot water tank (1), a heat collecting plate (2) provided with a heat pipe (21) absorbing solar heat, and a glass plate (3) covering the heat collecting plate (2), wherein the heat collecting plate (2) EPDM tube 22 having a larger diameter than the heat pipe 21 surrounding the heat pipe 21 installed therein, and a plurality of supports inserted into the heat pipe 21 to support the heat pipe and the EPDM tube and having a space part. After filling water (fluid 22b) in the space formed by the ring 23 and the heat pipe and the EPDM tube, the seal 22a is formed at the bottom of the condenser 21a forming portion, and then the present invention is arranged in multiple arrangements. It should be the point of.

Description

Heat pipe type solar collector using EPDM tube

The present invention relates to a heat pipe type solar heat collecting plate using an EPDM tube, and more particularly, to a solar heat collecting plate provided by inserting a heat pipe into an EPDM tube.

In the solar water heater, the heat pipe method is a hot water tank in which the condenser 21a portion of the heat pipe 21 is arranged in a plurality of heat collecting plates 2, as shown in the overall perspective view of the conventional heat pipe method shown in FIG. Is inserted into (1) is configured to heat and use a fluid such as water and the heat collecting plate (2) is configured to cover the glass plate (3), Figure 8 is a plan view combined with the heat pipe and the absorber (24). .

The operating principle of the solar water heater configured in the conventional manner is as follows.

When the absorber 24 such as copper or aluminum sheet absorbing solar heat receives radiant energy from the sun, the absorber 24 is heated to contact the heat pipe 21 and the temperature of the connected heat pipe 21 rises, causing the working fluid inside the heat pipe. As the vaporization heat is heat exchanged with water in the portion of the condenser 21a inserted into the hot water tank 1, the vaporization heat is a principle of raising the temperature of the water inside the hot water tank.

However, the problem of the solar water heater in the above manner is to selectively coat the absorber 24 copper plate or aluminum plate with black-chromium plating or other material, the absorber (24) efficiently solar radiation energy Due to the spacing with a predetermined width in order to absorb the has the disadvantage that the number of heat pipes 21 per unit area of the heat collecting plate has to be constant.

An object of the present invention for solving the above problems is to increase the number of heat pipes inserted into the heat collecting plate of the same size to increase the thermal efficiency per unit area, to absorb the radiant energy of the sun without the absorber, polymer polymer outside the heat pipe The present invention provides a solar heat collecting plate capable of installing more heat pipes per unit area than a conventional solar heat collecting plate by inserting an EPDM.

1 is a perspective view of the present invention,

Figure 2 is a perspective view of the heat pipe combined with the EPDM tube of the present invention

Figure 3 is a perspective view showing a heat pipe inserted into the cut part of the EPDM tube of the present invention

Figure 4 is a vertical cross-sectional view of the present invention EPDM tube and heat pipe assembled state

5 is a plan view of a support ring for fixing the EPDM tube and the heat pipe of the present invention;

6 is a front view of a support ring for fixing the EPDM tube and the heat pipe of the present invention;

7 is an overall perspective view of a conventional heat pipe method;

8 is a plan view in which a heat pipe and an absorber are combined;

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

(1): hot water tank (2): heat collecting plate

(3): glass plate 21: heat pipe

21a: condenser 21b: working fluid

(22): EPDM tube (22a): sealing

(22b): water (fluid) (23): support ring

(23a): inner tube (23b): outer tube

(23c): connection

The constitution of the present invention is a solar water heater including a hot water tank (1), a heat collecting plate (2) provided with a heat pipe (21) absorbing solar heat, and a glass plate (3) covering the heat collecting plate (2), wherein the heat collecting plate (2) EPDM tube 22 having a larger diameter than the heat pipe 21 surrounding the heat pipe 21 installed therein, and a plurality of supports inserted into the heat pipe 21 to support the heat pipe and the EPDM tube and having a space part. After filling water (fluid 22b) in the space formed by the ring 23 and the heat pipe and the EPDM tube, the seal 22a is formed at the bottom of the condenser 21a, and then a plurality of the arrangements are arranged. do.

The method of sealing 22a is preferably a method such as heat fusion, but other sealing means may be used.

The support ring 23 is composed of an inner tube 23a for supporting the heat pipe 21 and an outer tube 23b for supporting the EPDM tube 22, and a plurality of connecting portions 23c are connected between both ends thereof. And a flow path is formed between the connecting portions 23c.

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

1 is an overall perspective view of the present invention, the heat condenser 21a of the heat pipe is inserted into the hot water tank (1) is extruded through which heat exchange is made.

In addition, a plurality of heat pipes 21 absorbing a plurality of solar heat are installed inside the flat heat collecting plate 2 that is in contact with the hot water tank 1, and the outside thereof is made of an EPDM (22) tube made of a polymer compound, and the arrangement thereof. The method may be multi-layered, as well as a single layer, so long as the solar light hits the top layer first and then the second reflected light reaches the bottom layer.

The heat collecting plate 2 is covered with a glass plate 3, wherein the space formed by the heat collecting plate 2 and the glass plate is preferably in a vacuum state, but may not be in a vacuum state.

The polymer compound used in the present invention is preferably EPDM, but any polymer compound may be used as long as it has an effect of heating the internal fluid by receiving heat from the outside.

Referring to the EPDM used in the present invention.

Among the high molecular compounds, EPDM has an excellent temperature and ozone resistance, weather resistance, heat resistance, oxidation resistance, low temperature characteristics, electrical properties, and polar properties. It is an automotive component such as water strips, body sealing, Radiator hoses, Heater hoses, Silencer mounts, Protectors, Radiator packing, Brake system, Lamp packing, Tires and tubes (Tire & tube), used for impact reinforcement materials such as bumper hose,

In addition, electric wires, electrical parts, roofing sheets, belts (used to cover heat-resistant belts), civil engineering (waterproof plates for waterproofing gas, protective pans, etc.) and rolls : A commercial EPDM that is used as a low hardness heat resistant roll for copying faxes, a heat resistant roll for steel making, etc.-bathroom hoses, sponges for building materials, etc.

In general, commercially available EPDM (Ethylene-Propylene-Dienemethylene) is composed of the following structural formula.

The general method for preparing EPDM having such a structure is made by copolymerizing ethylene and propylene with a Ziegler type catalyst, which can be vulcanized with sulfur, and since the double bonds have side chains, they are not significantly affected by ozone resistance and weather resistance. .

In this physical property, the EPDM is in the form of a tube, and when the solar heat is supplied from the outside, the physical property of the temperature of the fluid flowing inside the tube is not mentioned at all. It was used.

The present inventors made the EPDM in the form of a tube and filled the fluids such as water and experimented the data as shown in Table 1 below.

Table 1

Measuring time Collector plate temperature (℃) Insolation (W / m ³ ) Ambient temperature (℃) 07:40:28 18.747 68.75 18.727 07:59:28 19.025 114.19 19.574 08:18:28 19.277 137.5 19.521 08:37:28 19.537 143.99 19.597 08:56:28 19.949 132.78 20.233 09:15:28 20.224 173.79 20.265 09:34:28 20.625 351.42 21.782 09:53:28 21.374 336.08 21.252 10:12:28 22.2 367.36 21.47 10:31:28 23.996 408.37 22.822 10:50:28 24.656 393.32 22.205 11:09:28 25.977 905.26 22.678 11:28:28 28.003 914.12 23.474 11:47:28 29.754 349.95 23.956 12:06:28 30.254 764.52 22.878 12:25:28 31.689 1050.1 23.855 12:44:28 33.95 833.27 24.289 13:03:28 35.563 407.49 23.08 13:22:28 36.512 358.8 23.855 13:41:29 36.798 611.08 23.698 14:00:29 37.762 856.58 23.274 14:19:29 38.693 625.25 23.14 14:38:29 40.353 625.84 24.596 14:57:29 40.716 504.56 25.023 15:16:29 41.48 236.05 24.38 15:35:29 41.772 287.1 24.513 15:54:29 42.225 226.91 24.405

Data measured on a clear day is shown in Table 2 below.

TABLE 2

Measuring time Ambient temperature (℃) Collector plate temperature (℃) 8:20 16.2 22.5 8:47 18.5 31.4 9:05 22.5 42.1 9:16 24.2 46.4 9:35 28.6 49.6 9:45 26.2 50.8 9:55 23.4 50.2 10:20 24.1 41.7 10:40 25.1 51.2 10:50 24.7 52.7 11:20 24.8 41.7 11:35 29.2 77.6 11:45 25.1 78.9 11:50 27.9 80.1 12:05 30.1 77.2 12:20 24.2 71 12:30 25.5 70.4 12:58 23.1 64.3 13:30 21.6 61.5 13:45 21.6 67.3 14:00 21.7 60.1 14:15 28 60.1 14:35 28.1 60.2 14:45 23.1 60.5 15:10 23.8 54.3 15:25 24 55.5 15:40 27.4 53.1 16:10 25.9 52.3 16:15 26.6 50.9 16:25 26.9 46.2

As shown in the above table, when using the EPDM synthetic rubber of the present invention, the temperature increase result was about 80 ° C.

Therefore, it can be seen from the results that the present invention has no problem in using EPDM in the form of a tube to cover the water using solar heat.

In other words, making a heat collecting plate using EPDM synthetic rubber has the advantage of low production cost, ultra-light weight, easy maintenance, and almost no problem in production use.

And since it can be manufactured by direct heating type without using heat medium (antifreeze), it has considerably higher thermal efficiency than indirect heating type, and it has excellent low temperature characteristics, so it can solve the freezing problem of heat collecting plate due to winter temperature drop. Since it is excellent, there is almost no deformation of the material even when exposed to sunlight for a long time.

And because the material is flexible, it does not matter whether it is manufactured in any form (length width) or in any place.

2 is a perspective view in which the EPDM tube 22 and the heat pipe 21 of the present invention are coupled to each other, and FIG. 3 shows a heat pipe 21 inserted into the EPDM tube 22 of the present invention. As a perspective view, a plurality of support rings 23 are inserted in the bottom pipe. As described above, the support rings 23 support the inner tube 23a supporting the heat pipe 21 and the EPDM tube 22. It consists of an outer tube (23b), and the connection between the two ends by a plurality of connecting portions (23c), forming a flow path between the connecting portion 23c to move the water through this flow path.

FIG. 4 shows a vertical cross-sectional view of the present invention in which the EPDM tube 22 and the heat pipe 21 are assembled, and a certain amount of the working fluid 21b is filled in the heat pipe 21 which is empty. This working fluid 21b has a property of vaporizing when it receives heat above a predetermined temperature.

In addition, the EPDM tube 22 is filled with water 22b. When the EPDM tube 22 receives solar radiation, the temperature of the water 22b rises, and the working fluid 21b inside the heat pipe 21 is increased. Will transfer heat.

As such, since the water 22b is filled in the inside, the working fluid 21b of the heat pipe 21 is operated even if there is no sunlight. .

Also shown is a portion in which the EPDM tube 22 is sealed with the heat pipe 21 by a method such as heat fusion prior to the formation of the capacitor 21a.

5 is a plan view of a support ring for fixing the EPDM tube 22 and the heat pipe 21 of the present invention, Figure 6 is a support ring for fixing the EPDM tube 22 and the heat pipe 21 of the present invention. As the front view of (23), the inner tube 23a and the outer tube 23b which are the tubes of different diameter which have concentric circles are shown by the connection part 23c.

When the solar water heater of the present invention as described above is installed in the solar direction using a support or the like at a predetermined angle, the radiant energy of the sun is transmitted to the EPDM tube 22, and the radiant energy is transferred to the water inside the EPDM tube 22. 22b) and the like, the heated heat temperature vaporizes the working fluid 21b inside the heat pipe 21, and the heat of vaporization increases the temperature of the water in the hot water tank 1 in the condenser 21a portion. .

The present invention as described above can be equipped with a larger number of heat pipes 21 per area of the same stage than the heat collecting plate using the copper plate or aluminum plate of the conventional absorber by using the EPDM tube 22 having good heat exchange efficiency. It has the advantage of making a thermally efficient solar water heater.

In other words, even in the case of using a heat collecting plate having a small unit area in a narrow space, the heat efficiency can be exhibited as in the conventional method, and the manufacturing cost is low, the installation is simple, and the maintenance is easy.

Claims (2)

In the solar water heater comprising a hot water tank (1), a heat collecting plate (2) provided with a heat pipe (21) absorbing solar heat, and a glass plate (3) covering the heat collecting plate (2), An EPDM tube 22 having a larger diameter than the heat pipe 21 surrounding the heat pipe 21 installed inside the heat collecting plate 2 and the heat pipe 21 to support the heat pipe and the EPDM tube, After filling the plurality of support rings 23 and the space formed by the heat pipe and the EPDM tube (fluid 22b) and sealing them 22a at the bottom of the condenser 21a forming part, the plurality of arrays are arranged. Heat pipe type solar heat collecting plate using an EPDM tube characterized in that the configuration. delete