JP5389744B2 - Heat recovery system - Google Patents

Description

  The present invention relates to a heat recovery system installed on the back surface of a solar cell panel.

In some cases, radiant energy from the sun that does not release carbon dioxide is converted into general-purpose energy.
For example, solar power generation generates power by receiving sunlight from a solar cell panel spread over a predetermined range.

  Since the amount of power generated by solar power generation is determined by the installation area of the solar cell, it is necessary to increase the installation area of the solar cell in order to obtain a larger amount of power generation. However, since the range in which solar cells can be installed is limited, there is a limit to the use efficiency of radiant energy only by solar power generation.

  Therefore, as shown in Patent Document 1, Patent Document 2, and the like, for the purpose of more efficiently using radiant energy from the sun, a solar panel is provided with a heat collecting panel on the back of the solar cell to collect solar heat together with solar power generation. Heating power collection systems have been developed.

Japanese Patent Laid-Open No. 10-62017 JP 56-64474 A

Conventional power generation and heat collection systems generally move solar heat collected by a heat collection panel to a hot water storage tank via a pipe, but there is a risk that heat will be dissipated when the solar heat moves.
In addition, since a conventional power generation and heat collection system is a panel in which a solar cell and a heat collection panel are integrally formed, when the solar cell is installed in advance, an existing solar power generation system is used. The system had to be removed and re-installed.

  From such a viewpoint, an object of the present invention is to propose a heat recovery system capable of efficiently recovering solar heat using an existing solar cell panel.

  In order to solve the above problems, a heat recovery system of the present invention is connected to a heat collection unit installed on the back side of a solar cell panel, a lid member covering the back surface of the heat collection unit, and the heat collection unit. A heat transporting unit, and the heat collecting unit has a flat plate that is in close contact with the back surface of the solar cell panel and a heat insulating material that covers the back surface of the flat plate, and the heat transporting unit is a refrigerant. It has the heat conduction member which connects a pipe | tube, the said flat plate, and the said refrigerant | coolant pipe | tube, The periphery of the said cover member is comprised so that it may closely_contact | adhere to the said frame member, It is characterized by the above-mentioned.

According to such a heat recovery system, since the flat plate and the heat transporting part are covered with the heat insulating material, the recovered heat is prevented from being dissipated during movement. Therefore, the radiation energy from the sun can be efficiently recovered.
In addition, because it is configured so that it can be installed in an existing solar cell using the inside of the solar cell panel, compared with the conventional technology that newly installs a power generation and heat collection system, Cost can be reduced.
Furthermore, since it is shielded by the lid member, it is possible to prevent rainwater or the like from entering the heat insulating material and to suppress heat dissipation.

  In the heat recovery system, the heat conducting member includes a first sheet material interposed between a back surface of the flat plate and the heat insulating material, and a second sheet circumferentially provided on the outer surface of the refrigerant pipe. More efficient heat collection is possible.

  Furthermore, if the said cover member is comprised by the non-thermally conductive member, the thermal radiation of the collected solar heat can be suppressed more efficiently.

  According to the heat recovery system of the present invention, it is possible to efficiently recover solar heat using an existing solar cell panel. Furthermore, it becomes possible to suppress the fall of the power generation efficiency by a solar cell panel by suppressing the temperature rise of a solar cell panel.

It is sectional drawing which shows typically the heat recovery system which concerns on the 1st Embodiment of this invention. It is sectional drawing which shows the heat recovery system and solar cell system which are shown in FIG. It is a disassembled perspective view which shows the heat recovery system of this embodiment. It is a disassembled perspective view which shows the heat recovery system which concerns on the 2nd Embodiment of this invention. It is sectional drawing which shows the heat recovery system which concerns on the 3rd Embodiment of this invention. It is sectional drawing which shows the modification of a heat recovery system. It is sectional drawing which shows the other modification of a heat recovery system.

<First Embodiment>
As shown in FIG. 1, the heat recovery system 10 of the first embodiment is attached to the back side of the solar cell panel (solar cell module) 20 (the side opposite to the surface irradiated with sunlight S), The solar battery panel 20 absorbs the thermal energy E of the sunlight S irradiated on it.

  Although this embodiment demonstrates the case where the heat recovery system 10 is installed in the existing solar cell panel 20 previously installed on the rooftop etc. of a building, the solar cell panel 20 which installs the heat recovery system 10 is installed ( In service) or a new one.

  As shown in FIG. 1, the heat recovery system 10 includes a heat collecting unit 10 a installed on the back side of the solar cell panel 20, a lid member 10 b that covers the back surface of the heat collecting unit 10 a, and a heat collecting unit 10 a. And the heat transport part 10c connected to each other.

  As shown in FIG. 2, the heat collector 10 a includes a flat plate 11 disposed on the solar cell panel 20 side, and a first heat insulating material (heat insulating material) 12 that covers the back surface of the flat plate 11. .

The flat plate 11 is composed of a member having high thermal conductivity, and collects the thermal energy E of the sunlight S irradiated to the solar cell panel 20 from the back surface of the solar cell panel 20 to the heat conductive member 14 described later. introduce.
In this embodiment, a metal plate is used as the flat plate 11, but the material constituting the flat plate is not limited.

As shown in FIG. 3, the flat plate 11 is a plate member having a rectangular shape in plan view, and has a planar shape equivalent to the support plate 22 of the solar cell panel 20.
As shown in FIG. 1, the flat plate 11 is housed inside the frame member 24 in a state of being in close contact with the back surface of the support plate 22.

  As shown in FIG. 3, the first heat insulating material 12 is formed in a rectangular shape in plan view. In the first heat insulating material 12, a slit 12 a for inserting the heat conducting member 14 is formed.

As shown in FIG. 1, the first heat insulating material 12 covers the back surface (surface opposite to the solar cell panel 20) of the flat plate 11 inside the frame member 24.
By disposing the first heat insulating material 12 in this way, the heat energy E collected by the flat plate 11 is prevented from being released from the back surface of the flat plate 11.

The lid member 10b is a plate member 19 made of a non-thermally conductive member, and is formed in a rectangular shape in plan view as shown in FIG.
In the lid member 10b, a slit 19b for inserting the heat conducting member 14 is formed corresponding to the position of the heat transport portion 10c.

  The lid member 10 b has an area equivalent to or larger than the outer shape of the frame member 24. Therefore, as shown in FIG. 1, the peripheral edge on the surface side (solar cell panel 20 side) of the lid member 10 b is in close contact with the end surface of the frame member 21. As a result, the lid member 10b shields the opening of the frame member 24 to prevent water from entering the frame member 24 (first heat insulating material 12), and to prevent heat from being released from the flat plate 11. To do.

  As shown in FIGS. 1 and 2, the lid member 10 b is fixed to the frame member 24 via the holding means 30. The configuration of the holding member 30 for fixing the lid member 10b to the frame member 24 is not limited and may be appropriately selected from known means. In this embodiment, the holding member 30 is fastened by a bolt 31. ing.

As shown in FIG. 2, a plurality of bolt holes 19 b and 19 b are formed in the plate material 19 corresponding to the positions of the female screw holes 24 a and 24 a formed in the frame member 24. The bolt 31 passes through the bolt holes 19 b and 19 b and is screwed into the female screw holes 24 a and 24 a, thereby fixing the plate material 19 (lid member 10 b) to the frame member 24.
Note that the number and arrangement of the bolt holes 19b (bolts 31) are not limited and can be set as appropriate. Here, reference numeral 32 in FIG. 2 denotes a washer.

  As shown in FIG. 2, the heat transport unit 10 c includes a refrigerant pipe 13, a heat conductive member 14 that connects the flat plate 11 and the refrigerant pipe 13, a second heat insulating material 15 that covers the outer peripheral surface of the refrigerant pipe 13, have.

  The refrigerant pipe 13 is a pipe connected by a material having high thermal conductivity, and the refrigerant flows through the inside. As shown in FIG. 2, the refrigerant pipe 13 is connected to the flat plate 11 via a heat conducting member 14. In the present embodiment, the refrigerant pipe 13 is constituted by a metal pipe, but the material constituting the refrigerant pipe 13 is not limited.

  The refrigerant pipe 13 is connected to a hot water tank or the like (not shown). Therefore, the thermal energy E transmitted to the heat transport unit 10 c is transported to the hot water storage tank via the refrigerant flowing through the refrigerant pipe 13.

  The heat conducting member 14 is made of a material having high heat conductivity, and transmits the heat energy E of the sunlight S collected by the flat plate 11 to the refrigerant pipe 13. In this embodiment, although the heat conductive member 14 is comprised with a metal plate, the material which comprises the heat conductive member 14 is not limited.

  As shown in FIG. 3, the heat conducting member 14 has a flat plate 11 side end (one end) formed wide (wide portion 14a) and has a T-shaped cross section. As shown in FIG. 2, the heat conducting member 14 penetrates the lid member 10 b and the slits 12 a and 19 a of the first heat insulating material 12, the wide portion 14 a on one end side is in close contact with the flat plate 11, and the other end side is a refrigerant. The tube 13 is in close contact.

The second heat insulating material 15 covers the outer peripheral surface of the refrigerant pipe 13, thereby suppressing the heat radiation of the refrigerant pipe 13.
In addition, you may prevent the 2nd heat insulating material 15 getting wet with rain etc. by covering the outer peripheral surface of the 2nd heat insulating material 15 with a water-impermeable member.

  As shown in FIGS. 2 and 3, the solar cell panel 20 includes a plurality of solar cells 21, 21,..., A support plate 22, a protective cover 23, and a frame member 24. .

  The solar battery cell 21 is an element that converts light energy into electric power. In addition, the shape of the photovoltaic cell 21 is not limited. Moreover, the number of the photovoltaic cells 21 which the solar power generation system 1 has is not limited.

The support plate 22 is a plate material that fixes the plurality of solar cells 21, 21,.
In the present embodiment, the support plate 22 is composed of a thermally conductive member. The solar radiation energy (heat energy E of sunlight S) radiated to the surface of the support plate 22 (the surface on which the solar cells 21 are fixed) is transmitted to the flat plate 11 in close contact with the back surface.

The protective cover 23 is a plate material disposed so as to cover the surface of the solar battery cell 21. The solar battery cell 21 is sandwiched between the support plate 22 and the protective cover 23.
The material constituting the protective cover 23 is not limited as long as it is made of a material that transmits sunlight S. For example, glass, polycarbonate resin, acrylic resin, ETFE (tetrafluoroethylene / ethylene copolymer) ), PVC (vinyl chloride resin), PVDF (polyvinylidene fluoride) and the like are employed.

The frame member 24 is formed in a rectangular shape and covers the outer periphery of the support plate 22 and the protective cover 23.
The frame member 24 has a height that is greater than the thickness of the support plate 22 and the protective cover 23 that are overlapped with each other. A space capable of accommodating 10a is formed.

  The frame member 22 is formed with a plurality of female screw holes 24a, 24a at predetermined intervals so that the bolts 31 can be screwed together. In addition, what is necessary is just to set suitably the number and arrangement | positioning of the female screw hole 24a according to the shape and scale of the solar cell panel 20 so that the heat recovery system 10 can be fixed to the solar cell panel 20. Further, the female screw hole 24 a may be omitted depending on the holding method by the holding means 30.

According to the heat recovery system 10 of the present embodiment, by attaching to the existing solar cell panel 20, it is possible to recover and use the thermal energy together with solar power generation.
Therefore, the cost can be reduced by using an existing apparatus without installing a new apparatus.

Moreover, since the location used for photovoltaic power generation is used, it is not necessary to secure a new site. Therefore, in addition to the power generation by the solar cell panel 20, the amount of energy collected can be increased by converting the radiation energy from the sun into the thermal energy E and using it.
As a result, it is possible to use general-purpose energy without releasing carbon dioxide.

Although the temperature of the solar cell panel 20 is increased by the irradiation with the sunlight S, the thermal energy E is transferred to the refrigerant pipe 13 via the flat plate 11 and the heat conducting member 14 due to a temperature difference with the refrigerant having a low temperature stably. Moving.
Since the flat plate 11 and the heat conducting member 14 are covered with the first heat insulating material 12, heat dissipation loss during movement of the thermal energy E is suppressed.

  By collecting the radiant energy of the sunlight S, it is possible to prevent the temperature of the roof and the wall surface of the building where the solar cell panel 20 is disposed from rising, so that the building can be cooled.

In addition, by using the thermal energy recovered by the heat recovery system 10 for hot water supply or air conditioning, it is possible to reduce the energy used.
In addition, with the reduction of energy used, CO ₂ emissions can be reduced.

  Moreover, in order to absorb heat in the back surface of the solar cell panel 20, the temperature rise of a solar cell module (solar cell 21) is suppressed, and it is prevented that the power generation efficiency by the solar cell 21 falls.

In addition, it is said that about 10% of the radiant energy from the sun is converted into electric energy in a crystalline solar cell that is currently popular. According to the heat recovery system 10 according to the present embodiment, in addition to the power generation by the solar cell, the solar heat is absorbed, so that the utilization ratio of the entire energy is further improved. In addition, by effectively using the radiant energy from the sun, it is possible to reduce the amount of CO ₂ emission and to construct an environment-friendly structure.

According to the heat recovery system 10 of the present embodiment, when installed in an area of 1000 m ² , the running cost of the power plant etc. is reduced by about 5.3 million yen / year, and the CO ₂ reduction is about 200 CO _{2. 2-} t / year is expected. In addition, the power generation efficiency by the solar cell panel 20 by the radiant energy of the sunlight S is 15%, and the recovery rate of the thermal energy E by the heat recovery system 10 is 30%.

<Second Embodiment>
As shown in FIG. 4, in the heat recovery system 10 of the second embodiment, the heat conductive member 14 includes a first heat conductive sheet material 16, a second heat conductive sheet material 17, and a third heat. It is different from the heat recovery system 10 shown in the first embodiment in that the conductive sheet material 18 is provided.

  The first heat conductive sheet material 16 is interposed between the back surface of the flat plate 11 and the first heat insulating material 12. In the present embodiment, the heat transfer sheet 16 is disposed over the entire back surface of the flat plate 11 by disposing a plurality of strip-shaped first heat conductive sheet materials 16 at predetermined intervals. Thereby, the thermal energy E can be collected from a wide range, and the thermal energy E can be transmitted to the refrigerant pipe 13 more efficiently.

  The second heat conductive sheet material 17 is provided around the outer surface of the refrigerant tube 13 and transmits the thermal energy E transmitted from the first heat conductive sheet material 16 from the periphery of the refrigerant tube 13 to the refrigerant.

  The 3rd heat conductive sheet material 18 connects the 1st heat conductive sheet material 16 and the 2nd heat conductive sheet material 17, and efficiently uses the thermal energy E collect | recovered by the 1st heat conductive sheet material 16. This is transmitted to the second heat conductive sheet material 17.

  Since the configuration of the heat recovery system 10 of the other second embodiment is the same as the contents shown in the first embodiment, detailed description thereof is omitted.

As mentioned above, according to the heat recovery system 10 of 2nd Embodiment, since the heat conductive member 14 is arrange | positioned in the back surface side whole region of the flat plate 11 which absorbed heat, it can collect | recover heat | fever more efficiently. it can.
In addition, since the effect of the heat recovery system 10 according to the second embodiment is the same as the contents shown in the first embodiment, detailed description thereof is omitted.

<Third Embodiment>
As shown in FIG. 5, in the heat recovery system 10 of the third embodiment, a flat plate that is in close contact with the back surface of the solar cell panel 20 and a heat conductive member that connects the flat plate and the refrigerant pipe 13 are integrated. It is different from the heat recovery system 10 (see FIG. 2) of the first embodiment in which the flat plate 11 and the heat conductive member 14 are configured by separate members in that the heat collecting conductive member 11 ′ is provided. .

  The heat collecting conductive member 11 ′ is configured by bending a member having high thermal conductivity (for example, a metal plate or a heat conductive sheet).

  As shown in FIG. 5, the heat collecting conductive member 11 ′ of the present embodiment is wound around the outer peripheral surface of the refrigerant tube 13, and then both end portions of the slit 19 a of the lid member 10 b and the first heat insulating material 12. It penetrates through the slit 12a in the direction of the solar cell panel 20 (upward in FIG. 5). The portions penetrating the slits 12a and 19a (both ends of the heat collecting conductive member 11 ′) are bent at the surface of the first heat insulating material 12, and one end (the left end in FIG. 5) is the first heat insulating material 12. It arrange | positions along the surface of the 1st heat insulating material 12 so that it may correspond with one end and the other end (right front-end | tip in FIG. 5) may correspond with the other end of the 1st heat insulating material 12. FIG. The installation form of the heat collecting conductive member 11 ′ is not limited to the above.

  Since the configuration of the heat recovery system 10 of the other third embodiment is the same as that shown in the first embodiment, detailed description thereof is omitted.

As described above, according to the heat recovery system 10 of the third embodiment, heat collection and heat conduction to the refrigerant pipe 13 are performed by one member, so that more efficient heat recovery can be achieved.
In addition, since the operational effects of the heat recovery system 10 according to the third embodiment are the same as the contents shown in the first embodiment, detailed description thereof is omitted.

The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and the above-described constituent elements can be appropriately changed without departing from the spirit of the present invention.
For example, the installation location of the heat recovery system of the present invention is not limited as long as the solar cell panel is installed.

  In each of the embodiments described above, the case where one refrigerant pipe 13 is provided has been described. However, the number of refrigerant pipes 13 is limited, for example, two refrigerant pipes 13 and 13 are provided as shown in FIG. What is necessary is just to set suitably according to the scale of the heat recovery system 10 and the solar cell panel 20, not what is carried out. That is, more efficient heat recovery may be achieved by appropriately setting the number and arrangement of the refrigerant tubes 13.

Moreover, in each said embodiment, although the refrigerant pipe 13 shall be piping along the outer surface of the cover member 10b, the heat-transport part 10c is arrange | positioned in the internal space of the frame member 24, ie, the 1st heat insulating material 12 ( The refrigerant pipe 13 may be piped inside the heat collecting part 10a) (see FIG. 7).
In each of the above embodiments, the refrigerant pipe 13 is piped close to one side (right side in the drawing), but the arrangement of the refrigerant pipe 13 is not limited, and the efficiency of heat recovery and other equipment What is necessary is just to set suitably according to the positional relationship with the attachment member to an apparatus, a building, etc.

DESCRIPTION OF SYMBOLS 10 Heat recovery system 10a Heat collection part 10b Cover member 10c Heat transport part 11 Flat plate 12 1st heat insulating material (heat insulating material)
DESCRIPTION OF SYMBOLS 13 Refrigerant tube 14 Heat conductive member 15 2nd heat insulating material 16 1st heat conductive sheet material 17 2nd heat conductive sheet material 20 Solar cell panel 24 Frame member E Thermal energy S Sunlight

Claims (3)

A heat collecting part installed on the back side of the solar cell panel;
A lid member covering the back surface of the heat collecting part;
A heat recovery system configured integrally with a heat transport section connected to the heat collection section,
The heat collecting part has a flat plate closely attached to the back surface of the solar cell panel, and a heat insulating material covering the back surface of the flat plate,
The heat transport section includes a refrigerant pipe, and a heat conduction member that connects the flat plate and the refrigerant pipe,
The heat recovery system is characterized in that a peripheral edge of the lid member is configured to be in close contact with a frame member of the solar cell panel.   The heat conduction member is a first heat conduction sheet material interposed between a back surface of the flat plate and the heat insulating material, and a second heat conduction sheet material circumferentially provided on the outer surface of the refrigerant pipe. The heat recovery system according to claim 1, comprising:   The heat recovery system according to claim 1, wherein the lid member is formed of a non-thermally conductive member.

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