JP7175246B2 - SOLAR POWER GENERATION HOT WATER SUPPLY SYSTEM, HOUSING COMPLETE INCLUDING THE SAME, AND METHOD FOR MANUFACTURING SOLAR POWER GENERATION HOT WATER SUPPLY SYSTEM - Google Patents

Description

TECHNICAL FIELD The present invention relates to a solar power generation hot water supply system using a photovoltaic panel and a heat pump, a housing complex including the same, and a method for manufacturing a solar power generation hot water supply system.

It is known that the power generation efficiency of a photovoltaic power generation system decreases when the photovoltaic panel (hereinafter referred to as “photovoltaic panel”) becomes hot due to solar energy.
A system using a photovoltaic panel and a heat pump is disclosed in Patent Document 1, for example.

The "solar energy utilization system" of Patent Document 1 includes a first heat exchanger that cools a photovoltaic panel, a heat pump connected to the first heat exchanger, and a heat medium between the first heat exchanger and the heat pump. and a flow controller for changing the flow rate of the circulation pump. This is intended to improve the utilization efficiency of solar energy.

JP 2013-83397 A

In Patent Literature 1, since the heat medium needs to be circulated between the first heat exchanger and the gas heat exchanger of the heat pump, it is necessary to install piping for circulating the heat medium.
In addition, the water heater using the heat pump of Patent Document 1 (heat pump type water heater) has restrictions on the heat source temperature that can be boiled efficiently. On days with little solar radiation, such as cloudy weather, the temperature of the liquid heat transfer medium may drop too low or freeze, reducing the efficiency of the heat pump.

Moreover, since the heat pump of Patent Document 1 circulates the heat medium, if the heat capacity of the heat medium exceeds the cooling capacity of the heat pump, the heat medium cannot be cooled completely, and the temperature of the heat medium rises more and more. On the other hand, the heat pump also has an upper limit (for example, about 45° C. or higher) for the allowable temperature on the heat source side, and if the heat medium exceeds the allowable temperature, the heat pump may stop operating. Therefore, when the circulating heat medium accumulates too much heat capacity and becomes hot, and the heat pump stops, there is a possibility that the solar energy utilization system of Patent Document 1 cannot be used.
In addition, even if the heat pump does not stop operating, the heat capacity accumulates in the circulating heat medium, and the heat medium that has not been cooled is sent to the first heat exchanger, so the power generation efficiency of the photovoltaic panel increases. could have declined.
Therefore, there is a possibility that the efficiency of the solar energy utilization system of Patent Literature 1 may decrease even on days with high solar radiation such as fine weather.

Furthermore, on a day with a slight breeze or no wind, the cooling effect of the photovoltaic panel due to the air current of the natural wind cannot be expected, and there is a possibility that the power generation efficiency of the photovoltaic panel may decrease.

The present invention was created to solve the above problems. In other words, an object of the present invention is to provide a solar power generation hot water supply system capable of improving the conversion efficiency of solar energy throughout the year, a housing complex equipped with the solar power generation hot water supply system, and a method for manufacturing the solar power generation hot water supply system.

According to the present invention, a photovoltaic panel whose surface faces upward and generates electricity from sunlight received on the surface;
a heat pump type water heater installed adjacent to the photovoltaic panel, sucking ambient air, absorbing heat from the air, and using the heat to boil water;
The heat pump type water heater provides a solar power generation hot water supply system in which cold air in which the air is cooled by the heat absorption is applied to the rear surface of the photovoltaic panel.

Further, according to the present invention, a photovoltaic panel whose surface faces upward and generates electricity from sunlight received on the surface;
preparing a heat pump type water heater that draws in ambient air, absorbs heat from the air, and uses the heat to boil water;
The heat pump type water heater has a heat pump having an intake port for sucking the air from the surroundings and an exhaust port for sending cold air obtained by absorbing heat from the air and supplying cold air on different sides. can be,
The heat pump and the photovoltaic panel are arranged so that the cool air hits the back surface of the photovoltaic panel from one end.

According to the above-described present invention, even if the photovoltaic panel is heated by the sunlight on a day when the temperature is high, the cold wind containing cold exhaust heat from the heat pump is applied to the back surface of the photovoltaic panel to cool the photovoltaic panel. The power generation efficiency of the photovoltaic panel can be improved. As a result, the power generation efficiency of the photovoltaic panel can be improved more than when cold air is not applied.

Also, since the heat medium between the heat pump and the photovoltaic panel is gas (air), there is no risk of freezing even in a low temperature environment. Moreover, since the heat medium is air, the heat medium can be taken in from the atmosphere and released into the atmosphere, so that the heat medium is not circulated and the heat capacity is not accumulated in the heat medium. Therefore, according to the present invention, the heat pump is less likely to stop operating, and the power generation efficiency of the photovoltaic panel is less likely to decrease.

Therefore, since the heat pump can be operated throughout the year, cold wind can be applied to the photovoltaic panel throughout the year.
In addition, since the heat pump can be operated all year round, even on days when the wind does not blow, the cold wind can generate an air current and cool the photovoltaic panel.
Therefore, according to the present invention described above, the power generation efficiency of the photovoltaic panel can be improved all year round.

1 is an overall conceptual diagram of a solar power generation hot water supply system according to a first embodiment; FIG. It is a lineblock diagram of a heat pump of a 1st embodiment. 1 is a plan view of a housing complex in which the solar power generation hot water supply system of the first embodiment is installed; FIG. FIG. 10 is an explanatory diagram of a photovoltaic panel according to a second embodiment; FIG. 11 is an overall conceptual diagram of a solar power generation hot water supply system according to a third embodiment; FIG. 10 is a plan view of an apartment house in which a solar power generation hot water supply system according to a third embodiment is installed, which includes a heat pump with an air intake port provided on the front side surface and an exhaust port provided on the right side surface.

Preferred embodiments of the present invention will now be described with reference to the drawings. In addition, the same code|symbol is attached|subjected to the part which is common in each figure, and the overlapping description is abbreviate|omitted.

(First embodiment)
FIG. 1 is an overall conceptual diagram of a solar power generation hot water supply system 100 according to the first embodiment. In this figure, the flows of air 1 and cold air 2 are indicated by thick arrows. Thick arrows indicate that the darker the color, the higher the temperature, and the lighter the color, the lower the temperature.
In this figure, a solar power generation hot water supply system 100 includes a photovoltaic panel 10 and a heat pump water heater 20 .

As described above, in the photovoltaic power generation system, when the temperature of the photovoltaic panel 10 becomes high due to solar energy, the power generation efficiency decreases. The present inventor thought that the high-temperature photovoltaic panel 10 could be an effective heat source for the heat pump type water heater 20, and came up with the present invention.

The photovoltaic panel 10 is a flat panel, and generates electricity with the energy of the sunlight received on the surface 11 . The photovoltaic panel 10 is installed so that the surface 11 is exposed to sunlight. The obtained electric power may be supplied to the outside or may be used to drive a pump or the like that constitutes the solar power generation hot water supply system 100 . In this figure, the photovoltaic panel 10 is installed on the roof of a housing complex 200 such as a condominium or apartment with its surface 11 facing upward. However, the place where the solar power generation hot water supply system 100 is installed is not limited to the housing complex 200 . The place of installation may be the roof of a building, or the garden or the roof of a detached house.

The heat pump type water heater 20 is installed adjacent to the photovoltaic panel 10, and is a device that takes in ambient air 1, absorbs heat from the air 1, and uses the heat to boil water. In this figure, the heat pump water heater 20 has a heat pump 30 and a hot water storage tank 40 .
A heat pump 30 takes in ambient air 1, absorbs heat, and boils using the heat. The heat pump 30 cools the air 1 sucked from the intake port 33 by absorbing heat, and sends the cold air 2 from the exhaust port 34 . This figure shows an example of a heat pump 30 having an air inlet 33 on the front side (front) and an air outlet 34 on the rear side (back). However, the positions of the intake port 33 and the exhaust port 34 of the heat pump 30 are not limited to this, and may be provided on different sides. For example, the intake port 33 may be provided on the front side surface and the exhaust port 34 may be provided on the right side surface.

In the following description, of the ends of the photovoltaic panel 10 , the end to which the cool air 2 is supplied is referred to as one end 13 , and the opposite end is referred to as the other end 14 . The horizontal direction in which the edge of the one end portion 13 extends is defined as the left-right direction, and the horizontal direction orthogonal to the left-right direction is defined as the front-rear direction.

The photovoltaic panel 10 is installed so that the cool air 2 exhausted from the exhaust port 34 is sent from one end 13 of the photovoltaic panel 10 toward the rear surface 12 . Since the exhaust port 34 in this figure is provided on the rear side surface of the heat pump 30 , the heat pump 30 is installed with the rear side surface facing the photovoltaic panel 10 . The photovoltaic panel 10 may be installed such that the one end 13 is positioned above the exhaust port 34 . As a result, the cold air 2 discharged from the exhaust port 34 can be sent from the one end 13 of the photovoltaic panel 10 toward the rear surface 12 and applied to the rear surface 12 .
The method of sending the cold air 2 to the rear surface 12 of the photovoltaic panel 10 is not limited to this. For example, a duct extending below one end portion 13 of the photovoltaic panel 10 may extend from the air outlet 34 , and cool air 2 may be sent to the rear surface 12 of the photovoltaic panel 10 through the duct.

There are three reasons for blowing the cold air 2 to the rear surface 12 of the photovoltaic panel 10 instead of the front surface 11 as follows.
Firstly, the wind velocity tends to be lower in the lower part of the photovoltaic panel 10 than in the upper part, and the cool air 2 tends to stay.
Second, the front surface 11 of the photovoltaic panel 10 has a glass surface and the back surface 12 does not have a glass surface. Therefore, it is advantageous in terms of heat transfer to cool the rear surface 12 which has no glass surface.
Third, when trying to exhaust the cold air 2 toward the surface 11 of the photovoltaic panel 10 , the photovoltaic panel 10 is arranged below the exhaust port 34 of the heat pump 30 . Then, if the heat pump 30 is arranged on the south side of the photovoltaic panel 10 , the photovoltaic panel 10 will be in the shadow of the heat pump 30 . On the other hand, if the photovoltaic panel 10 and the heat pump 30 are arranged so that the cool air 2 is discharged to the rear surface 12 of the photovoltaic panel 10 as in the present embodiment, the heat pump 30 can be installed in any direction on the photovoltaic panel 10. This is because the photovoltaic panel 10 does not become a shadow even when the light is on.

The cool air 2 hitting the back surface 12 of the photovoltaic panel 10 flows to the right side of the drawing while maintaining the momentum of being exhausted. As a result, the photovoltaic panel 10 heated by the sunlight can be cooled by the cold air 2 from the rear surface 12.例文帳に追加As described above, the solar power generation hot water supply system 100 of the present embodiment can effectively use the cold heat that would otherwise be discharged into the air from the heat pump 30 to cool the photovoltaic panel 10, thereby increasing power generation efficiency.

In general, the photovoltaic panel 10 is often inclined with the surface 11 facing south in order to increase power generation efficiency. The photovoltaic panel 10 of this embodiment may be installed horizontally, but the surface 11 may be inclined as shown in this figure.

The one end 13 close to the upper side of the exhaust port 34 in this figure is the lower end of the photovoltaic panel 10, but is not limited to this. When the photovoltaic panel 10 is inclined, the one end 13 close to the air outlet 34 may be the upper end or the lower end of the photovoltaic panel 10 .

FIG. 2 is a configuration diagram of the heat pump 30 of the first embodiment.
The heat pump 30 heats the hot water 4 in the hot water storage tank 40 using the air 1 heated by the photovoltaic panel 10 as a heat source.

The heat pump 30 has an inlet 33 and an outlet 34 on different sides. The air 1 sucked from around the heat pump 30 is discharged from the exhaust port 34. - 特許庁In this figure, the heat pump 30 has a compressor 35, a liquid heat exchanger 36, an expander 37, a gas heat exchanger 38, and an air passage 39, inside which the heat medium 3 circulates. The heat carrier 3 may be, for example, heated air, carbon dioxide, water, steam, oil. The heat pump water heater 20 also includes a hot water storage tank 40 that holds the hot water storage 4 therein, and a circulation line 41 that circulates the hot water storage 4 between the hot water storage tank 40 and the liquid heat exchanger 36 to heat the hot water storage 4 with heat. And prepare.

The circulation path of the heat medium 3 is indicated by a→b→c→d→a in the figure. As a→b, the heat medium 3 is adiabatically compressed and the pressure and steam temperature rise. As b→c, the heat medium 3 is isothermally cooled and liquefied while maintaining a high pressure. As c→d, the heat medium 3 expands adiabatically, and the pressure and steam temperature decrease. At d→a, the heat medium 3 is isothermally heated and vaporized while maintaining a low pressure.
The condensation temperature TH in the liquid heat exchanger 36 may be set at 90-100°C, for example, and the evaporation temperature TL in the gas heat exchanger 38 may be set at 30-40°C, for example.

The air 1 sucked from the intake port 33 is sent to the gas heat exchanger 38 through the air passage 39 . In the gas heat exchanger 38, the air passage 39 is configured such that the air 1 is in contact with the pipe wall of the pipe through which the heat medium 3 at the evaporation temperature TL passes. The air 1 gives heat to the heat medium 3 while passing through the air passage 39 . The air 1 is thereby cooled while passing through the gas heat exchanger 38 .
With this configuration, the heat pump 30 can maintain the condensation temperature TH and the evaporation temperature TL, cool the air 1 with the gas heat exchanger 38 , and heat the hot water storage 4 with the liquid heat exchanger 36 . The air 1 that has been cooled by absorbing heat in the gas heat exchanger 38 is sent from the exhaust port 34 as cold air 2 .

Note that the heat pump 30 is not limited to the example described above, and may be another type of heat pump.

The hot water storage tank 40 holds the hot water storage 4 inside. This hot water storage 4 is used, for example, for domestic purposes (bath, kitchen, heating, etc.).

According to the solar power generation hot water supply system 100 of the first embodiment described above, the photovoltaic panel 10 is cooled from the back surface 12 by the cold exhaust heat of the heat pump 30, thereby improving the power generation efficiency (output) of the photovoltaic panel 10. be able to. For example, even in a season such as summer when the temperature is high, the photovoltaic panel 10 heated by the sunlight is cooled by the cold air 2 from the rear surface 12, so that the power generation efficiency of the photovoltaic panel 10 is higher than when the cold air 2 is not applied. can be improved. In addition, even on a day with a slight breeze or no wind, the cool air 2 is sent toward the rear surface 12 of the photovoltaic panel 10, and an air current is generated under the photovoltaic panel 10, so that the cooling effect can be maintained continuously. .

Moreover, since the heat medium between the heat pump 30 and the photovoltaic panel 10 is gas (air 1), there is no risk of freezing even in a low temperature environment. Moreover, since the heat medium is the air 1, the heat medium can be taken in from the atmosphere and released into the atmosphere, so that the heat medium is not circulated and the heat capacity is not accumulated in the heat medium. Therefore, the solar power generation hot water supply system 100 of the present embodiment can suppress the possibility that the heat pump 30 will stop operating and the possibility that the power generation efficiency of the photovoltaic panel 10 will decrease. Therefore, the heat pump 30 can be operated throughout the year, so the power generation efficiency can be improved throughout the year compared to simply generating solar power with the photovoltaic panel 10 .

Furthermore, in the solar power generation hot water supply system 100 of the present embodiment, the heat medium for cooling the photovoltaic panel 10 is the cold air 2 (air 1 containing cold waste heat) discharged into the air. Thus, there is no need to install piping for circulating the heat medium between the first heat exchanger and the heat pump. Therefore, the manufacturing cost can be reduced as compared with the system of Patent Document 1.

Next, a method for manufacturing the solar power generation hot water supply system 100 of this embodiment will be described.
FIG. 3 is a plan view of an apartment complex 200 in which the solar power generation hot water supply system 100 of the first embodiment is installed. In this figure, the flows of air 1 and cold air 2 are indicated by thick arrows. Thick arrows indicate that the darker the color, the higher the temperature, and the lighter the color, the lower the temperature. Also, the cold air 2 flows under the photovoltaic panel 10, but the arrow is shown above the photovoltaic panel 10 for the sake of explanation.

First, the photovoltaic panel 10 and the heat pump water heater 20 are prepared in a place exposed to sunlight.
The photovoltaic panel 10 is installed so that the surface 11 faces upward. At this time, it is preferable to install the surface 11 inclined to the south side from the horizontal. As a result, sunlight can be efficiently received on the surface 11, so power generation efficiency can be increased.

When installing the heat pump water heater 20 , the exhaust port 34 of the heat pump 30 is directed toward the photovoltaic panel 10 . At this time, the one end 13 of the photovoltaic panel 10 is brought close to the upper side of the exhaust port 34 so that the cool air 2 hits the rear surface 12 of the photovoltaic panel 10, and the photovoltaic panel 10 is adjacent to the heat pump 30.例文帳に追加
As a result, the photovoltaic panel 10 can be efficiently cooled by the exhaust gas (cold air 2) from the heat pump 30, so that the power generation efficiency of the photovoltaic panel 10 can be increased.
It is preferable that the hot water storage tank 40 is installed at a position where the piping for circulating the hot water 4 reaches the heat pump 30 and does not cast a shadow on the photovoltaic panel 10 .

When a plurality of heat pump water heaters 20 are installed, it is preferable to arrange the photovoltaic panels 10 adjacent to each other in the left-right direction (direction extending east-west in the figure) as shown in the figure. As a result, even if the cold air 2 flows over both ends of the photovoltaic panel 10 in the horizontal direction in the figure, the adjacent photovoltaic panel 10 can be cooled, so that the cold heat of the cold air 2 can be efficiently and effectively utilized.

(Second embodiment)
FIG. 4 is an explanatory diagram of the photovoltaic panel 10 of the second embodiment. FIG. 4(A) is a side view, and FIG. 4(B) is a CC arrow view of FIG. 4(A).
As shown in this figure, the photovoltaic panel 10 of this embodiment has a plurality of plate-like fins 15 extending downward from the back surface 12 . The fins 15 are preferably made of metal and extend from one end 13 facing the heat pump 30 toward the other end 14 . The other end portion 14 refers to the end portion of the photovoltaic panel 10 that faces the one end portion 13 .

As a result, the surface area of the back surface 12 of the photovoltaic panel 10 is increased, so that heat can be efficiently exchanged between the cold air 2 and the back surface 12 . Moreover, the direction in which the cold air 2 flows can be guided in the front-rear direction from the one end portion 13 to the other end portion 14 .
Other configurations, manufacturing methods, and effects of this embodiment are the same as those of the first embodiment.

(Third embodiment)
FIG. 5 is an overall conceptual diagram of a solar power generation hot water supply system 100 according to the third embodiment. In this figure, the flows of air 1 and cold air 2 are indicated by thick arrows. Thick arrows indicate that the darker the color, the higher the temperature, and the lighter the color, the lower the temperature.
The heat pump water heater 20 of the present embodiment includes a plurality of photovoltaic panels 10 and heat pump water heaters 20 each. For example, the drawing shows an example in which the heat pump 30 has an intake port 33 on the front side surface (front surface) and an exhaust port 34 on the rear side surface (back surface). When the heat pump 30 is used, the heat pump water heater 20 of this embodiment alternately arranges the plurality of photovoltaic panels 10 and the heat pump 30 in the front-rear direction. This point is different from the first embodiment and the second embodiment.

As shown in FIG. 5, the photovoltaic panel 10 of this embodiment is preferably inclined with the surface 11 facing south. As a result, sunlight can be efficiently received on the surface 11 of the photovoltaic panel 10, so that not only the power generation efficiency increases, but also the temperature of the photovoltaic panel 10 can be easily increased. As a result, the heating efficiency of the water supply of the heat pump 30 can be increased by the amount corresponding to the temperature rise of the photovoltaic panel 10 .

The heat pump 30 in this figure has an intake port 33 and an exhaust port 34 on opposite front and rear sides. In this case, the photovoltaic panel 10 has one end 13 above the exhaust port 34 of the heat pump 30 adjacent to one end (front), and the other end 14 adjacent to the other end (rear). It is preferably located above and in close proximity to the inlet 33 of the heat pump 30 . As a result, the rear surface 12 of the photovoltaic panel 10 extends from above the exhaust port 34 of the heat pump 30 in front thereof to the intake port 33 of the heat pump 30 in the rear thereof. The back surface 12 of the photovoltaic panel 10 may be installed so as to extend from the upper end of the exhaust port 34 of the heat pump 30 in the front to the upper end of the intake port 33 of the heat pump 30 in the rear.

With this configuration, the cold air 2 from the heat pump 30 installed on the front side flows from front to back along the rear surface 12 of the photovoltaic panel 10 through the gap between the photovoltaic panel 10 and the floor surface of the housing complex 200 . The cold air 2 is warmed by the heat of the photovoltaic panel 10 while flowing along the rear surface 12, and is heated toward the rear. The air 1 (original cold air 2) warmed by the photovoltaic panel 10 is sucked into the intake port 33 of the rear heat pump 30 while being mixed with the surrounding air 1. - 特許庁
Thus, the air 1 moves from front to back while passing under the air passage 39 in the heat pump 30 and the photovoltaic panel 10 . In the meantime, the cooling and heating of the air 1 are repeated, and the cold waste heat of the heat pump 30 can be given to the photovoltaic panel 10 on the rear side, and the heat of the photovoltaic panel 10 can be recovered by the heat pump 30 on the rear side.

If the positions of the intake port 33 and the exhaust port 34 attached to the heat pump 30 are different, the arrangement of the heat pump 30 and the photovoltaic panel 10 is not limited to that described above. For example, in the case of the heat pump 30 having the air inlet 33 on the front side surface and the air outlet 34 on the right side surface, the air inlet 33 is directed toward the other end 14 of the photovoltaic panel 10 in front, and cool air is blown through the duct. 2 may be carried from the exhaust port 34 to the rear below one end 13 of the photovoltaic panel 10 .

FIG. 6 is a plan view of an apartment complex 200 in which the solar power generation hot water supply system 100 of the third embodiment is installed and which includes the heat pump 30 having the air inlet 33 provided on the front side surface and the air outlet 34 provided on the right side surface. be. In this figure, the flows of air 1 and cold air 2 are indicated by thick arrows. Thick arrows indicate that the darker the color, the higher the temperature, and the lighter the color, the lower the temperature. Also, the cold air 2 flows under the photovoltaic panel 10, but the arrow is shown above the photovoltaic panel 10 for the sake of explanation. In addition, in this figure, illustration of piping for passing the stored hot water 4 between the heat pump 30 and the hot water storage tank 40 is omitted.
As shown in this figure, when the heat pump 30 is provided with an air inlet 33 and an air outlet 34 on adjacent sides, the air outlet 34 is directed toward the photovoltaic panel 10 at the rear and downward from one end 13 thereof. The cool air 2 may be sent directly from the exhaust port 34 .

Next, a method for manufacturing the solar power generation hot water supply system 100 of the third embodiment will be described.
First, a plurality of photovoltaic panels 10 and heat pump water heaters 20 are prepared, and the heat pumps 30 and photovoltaic panels 10 are arranged alternately. At this time, the exhaust port 34 of the heat pump 30 is installed close to one end 13 of the photovoltaic panel 10 adjacent to the rear thereof, or the intake port 33 of the heat pump 30 is installed to the other end of the photovoltaic panel 10 adjacent to the front thereof. It is installed so as to be close to the part 14 . If the exhaust port 34 is located away from the one end 13 of the photovoltaic panel 10 on the rear side, the exhaust port 34 and the lower side of the one end 13 of the photovoltaic panel 10 are connected with a duct.
As a result, both the power generation efficiency and the heating efficiency of the hot water storage 4 can be easily improved simply by arranging the photovoltaic panel 10 and the heat pump 30 as in the third embodiment.

According to the solar power generation hot water supply system 100 of the third embodiment described above, the air 1 is warmed by the photovoltaic panel 10 heated by sunlight, and the heat pump 30 absorbs heat from the warmed air 1 (hot air). 30 water boiling efficiency can be improved. In other words, this embodiment can obtain not only the effect of improving the power generation efficiency obtained by cooling the photovoltaic panel 10 with the cold air 2 of the heat pump 30 but also the effect of improving the heating efficiency of the hot water storage 4 .

In addition, since the intake port 33 of the heat pump 30 is positioned near the other end portion 14 of the photovoltaic panel 10, the intake port 33 is positioned at the location where the warmest air 1 gathers in the vicinity of the heat pump 30. can be installed. As a result, the heat of the photovoltaic panel 10 can be efficiently collected in the heat pump 30 and converted into the heat of the hot water storage 4 .

Furthermore, the solar power generation hot water supply system 100 of this embodiment repeats cooling and heating of the air 1 from the heat pump 30 in the front row to the photovoltaic panel 10 in the rearmost row to generate power and heat the hot water storage 4 . In collective housing 200, each household owns heat pump 30 and photovoltaic panel 10. FIG.
For example, if the heat pumps 30 are placed together in the front and the photovoltaic panels 10 are placed together in the rear, the heat pumps 30 having the air inlet 33 near the exhaust port 34 placed in front, and the heat pump 30 having the air inlet 33 in the rear or the center The efficiency of the located photovoltaic panel 10 is reduced. Therefore, even if the same device is used, the heating efficiency and power generation efficiency may vary depending on the installation position of the heat pump 30 and the photovoltaic panel 10, and the reduction rate of electricity charges may vary depending on the household, which may be unfair. have a nature.

However, the solar power generation hot water supply system 100 of this embodiment can similarly absorb heat from the air 1 warmed by the photovoltaic panel 10 and the floor surface of the roof regardless of the position of the heat pump 30 installed. . Similarly, the solar power generation hot water supply system 100 of this embodiment can generate power while being cooled by the cold air 2 of the heat pump 30 in the same manner regardless of the position of the photovoltaic panel 10 installed. Therefore, regardless of the positions where the heat pump 30 and the photovoltaic panel 10 are installed, their heating efficiency and power generation efficiency can be uniformed. This makes it possible to make the rate of reduction in electricity charges fair for each household.

Other configurations, manufacturing methods, and effects of this embodiment are the same as those of the first or second embodiment.

According to the above-described present invention, even if the photovoltaic panel 10 is heated by sunlight on a day when the temperature is high, the cold wind 2 containing cold exhaust heat from the heat pump 30 is applied to the back surface 12 of the photovoltaic panel 10 to generate photovoltaic power. Since the panel 10 is cooled, the power generation efficiency of the photovoltaic panel 10 can be improved. As a result, the power generation efficiency of the photovoltaic panel 10 can be improved more than when the cold air 2 is not applied.

Moreover, since the heat medium between the heat pump 30 and the photovoltaic panel 10 is gas (air 1), there is no risk of freezing even in a low temperature environment. Moreover, since the heat medium is the air 1, the heat medium can be taken in from the atmosphere and released into the atmosphere, so that the heat medium is not circulated and the heat capacity is not accumulated in the heat medium. Therefore, according to the present invention, the heat pump 30 is less likely to stop operating, and the power generation efficiency of the photovoltaic panel 10 is less likely to decrease.

Therefore, since the heat pump 30 can be operated throughout the year, cold air can be applied to the photovoltaic panel 10 all year round. Moreover, since the heat pump 30 can be operated all year round, the photovoltaic panel 10 can be cooled even on days when the wind does not blow, by generating an air current with cold air.
Therefore, according to the present invention described above, the power generation efficiency of the photovoltaic panel 10 can be improved all year round.

It goes without saying that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention.

1 air, 2 cold air, 3 heat medium, 4 hot water storage,
10 photovoltaic panel, 11 front surface, 12 back surface,
13 one end, 14 other end, 15 fin,
20 heat pump water heater, 30 heat pump,
33 intake port, 34 exhaust port,
35 compressor, 36 liquid heat exchanger, 37 expander,
38 gas heat exchanger, 39 air passage,
40 hot water storage tank, 41 circulation line,
100 solar power generation hot water system, 200 collective housing,
TH condensation temperature, TL evaporation temperature

Claims (6)

a plurality of photovoltaic panels tilted with their surfaces facing forward and upward and generating electricity from the sunlight received by the surfaces;
a plurality of heat pump type water heaters installed adjacent to the photovoltaic panel and using heat absorbed from the surrounding air to boil water;
The heat pump type water heater has a heat pump that draws in the air from the front and feeds rearward cold air obtained by cooling the air by absorbing heat from the air,
The heat pump and the photovoltaic panel are alternately arranged in the front-rear direction,
The heat pump sandwiched between the photovoltaic panels on its front and back absorbs heat from the air warmed by the heat of the photovoltaic panels positioned in front of it, and cools the air obtained by the absorption of heat into the air positioned behind the heat pump. A solar-powered water heating system that hits the back of a photovoltaic panel. The heat pump has an intake port for sucking the air and an exhaust port for sending the cold air on different sides ,
2. The solar power generation hot water supply system according to claim 1, wherein said cool air is blown from a front end portion of said photovoltaic panel toward said back surface. 3. The solar power generation hot water supply system according to claim 2 , wherein said photovoltaic panel has a plurality of plate-like fins extending from said front end portion toward its rear end portion and extending downward from said back surface thereof. The heat pump has a compressor, a liquid heat exchanger, an expander, a gas heat exchanger, and an air passage for sending the air sucked from the intake port to the gas heat exchanger, and has a heat medium inside. is circulated, and
Furthermore, the heat pump type water heater includes a hot water storage tank that holds hot water therein,
3. The solar power hot water supply system according to claim 2 , further comprising a circulation line that circulates the stored hot water between the hot water storage tank and the liquid heat exchanger and heats the stored hot water with the heat. A housing complex comprising the solar power generation hot water supply system according to any one of claims 1 to 4 on the roof. a plurality of photovoltaic panels tilted with their surfaces facing forward and upward and generating electricity from the sunlight received by the surfaces;
preparing a plurality of heat pump water heaters that draw in ambient air, absorb heat from the air, and use the heat to boil water;
The heat pump type water heater has a heat pump having an intake port for sucking the air from the front and an exhaust port for sending the cool air, which is cooled by absorbing heat from the air, to the rear. can be,
The heat pump and the photovoltaic panel are alternately arranged in the front-rear direction ,
The heat pump sandwiched between the photovoltaic panels on the front and back of the heat pump absorbs heat from the air warmed by the heat of the photovoltaic panel positioned in front of the heat pump, and cool air obtained by the heat absorption is supplied to the light positioned behind the heat pump. A method for manufacturing a solar power generation hot water supply system arranged so as to be in contact with the back surface of a power generation panel .

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