JPS6335327Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention uses gravel as a solar heat collector and heat storage material.
This invention relates to a solar heat storage device that connects a heat storage tank using sensible heat from solid materials such as soil, rocks, and sand through heat collection piping.

Conventionally, solar heat storage devices are known in which a solar heat collector and this type of heat storage tank are connected through a heat collection pipe to store solar heat in the heat storage tank and utilize the heat, but they are generally impractical and have limited practicality. Since it does not take into account these factors, it has not become widely available.
In particular, with conventional solar heat storage devices of this type, when a large amount of hot water is used at once, it is necessary to rapidly heat the water that is added later, but no measures have been taken to deal with this. Nakatsuta.
As a result, once the hot water previously heated in the heat storage tank has been used up, a problem occurs in which the hot water cannot be used again, making it possible to use solar heat easily and effectively. This was a factor that hindered the spread of solar thermal storage devices.

In view of the above-mentioned problems, the present invention aims to improve the practicality of solar thermal storage devices by making it possible to store heat normally and quickly heat the heat medium for heat utilization when necessary. No.
11 Arrange a heat dissipation pipe, put a large amount of heat storage material made of chestnut stone, crushed stone, etc. on top of it, arrange a second heat dissipation pipe on top of it, and then arrange a heat distribution pipe for heat utilization above or near it. and connect the heat collecting pipes to the first and second pipes.
It is characterized in that it is switchably connected to a heat dissipation pipe, and the diameters of the first and second heat dissipation pipes are larger than those of the heat collecting pipe.

Next, the present invention will be explained based on the drawings. FIG. 1 is a conceptual partial longitudinal sectional side view of the solar heat storage device according to the present invention. In FIG. 1, a heat storage tank 1 is formed under the floor of a building. That is, the four side walls 2 of the heat storage tank 1 also serve as the foundation of the building, and almost the lower half is buried underground (Fig. 2). The upper end of the heat storage tank 1 is covered with a floor panel 3 made of hollow perforated concrete, and the floor panel 3 serves both as a cover and as the floor of the building. A heat insulating material 4 made of polyurethane foam, styrene foam, etc. is provided on the bottom surface of the heat storage tank 1 and inside the side wall 2 and floor panel 3 to form one closed space. A first heat dissipation pipe 6 embedded in a concrete layer 5 is disposed on the heat insulating material 4a on the bottom surface, and a heat storage material 7 made of a large amount of chestnut stone, crushed stone, etc. forms a heat storage layer on top of the first heat dissipation pipe 6. A horizontal plate-shaped concrete layer 8 is provided on the heat storage material 7,
A second heat radiation pipe 9, a hot water supply pipe 10, and a heat storage pipe 11 for hot water heating are embedded in the concrete layer 8 from the bottom. Furthermore, the concrete layer 8 and the upper insulation material 4b
A concrete plate 12 with hollow holes is installed between the hollow holes 13 of the plate 12 and the pipe 1.
0 and 11 form a heat distribution pipe 14.

A solar heat collector 16 installed in a place suitable for collecting solar heat, such as a rooftop, is connected to a first heat radiation pipe 6 and a second heat radiation pipe through a supply side heat collection pipe 19 having a cushion tank 17 and a circulation pump 18 in the middle. 9
The outlets of both heat dissipation pipes 6 and 9 are connected via valves 20 and 21, respectively, to a discharge side heat collection pipe 22 that communicates with the solar heat collector 16.
A heat medium such as water or oil is circulated between the collector 16 and the heat radiation tubes 6 and 9. 23
is a safety valve.

The inlets of the hot water supply pipe 10 and the heat storage pipe 11 are connected via a valve 24 to a water storage tank 25 in which tap water is stored, via a pipe 26.
The outlet is connected via a pipe 27 to a faucet 28 for bathing, cooking, etc. The outlet of the heat storage pipe 11 is
It communicates with a boiler 30 that also serves as a bath and a three-way valve 31 via a pipe 29, and the three-way valve 31 further communicates with a hot water outlet of the boiler 30 and a hot water inlet of an air conditioner 32. 3-way valve 31 and air conditioner 3
A circulation pump 33 is provided between the
Further, the hot water outlet of the air conditioner 32 is communicated with the piping 26. Here, the water storage tank 25 is installed at a sufficiently high position, so that when the hot water is circulated between the heat storage pipe 11 and the air conditioner 32 by the pump 33, the hot water will not flow back into the water storage tank 25, and the water will not flow back into the water storage tank 25. Supply is carried out smoothly due to the head difference. Note that 34 is a bathtub, which can be heated by a boiler 30.

The outlet of the hollow hole 13 in the concrete plate 12 is connected to a pipe 36 having a fan 35 in the middle, and the tip of the pipe 36 is connected to the inlet of the hollow hole 15 in the floor panel 3. Further, the outlet of the hollow hole 15 and the inlet of the hollow hole 13 are connected by a pipe 37 to form a closed circuit for air circulation between the two hollow holes 13 and 15.

As is clear from FIG. 2, the heat dissipation pipes 6 and 9, the pipes 10 and 11, and the hollow holes 13 and 15 are each arranged in parallel in large numbers, and they meander in a substantially horizontal plane to form long routes. Improves heat exchange efficiency. Further, the heat radiation pipes 6, 9, the pipes 10, 11, and the hollow holes 13, 15 are connected to the pipes 19, 22, and the pipe 2, respectively.
6, 27, 29, and the pipes 36, 37, and has a diameter larger than that of the pipes 36, 37, and the inside of the heat storage tank 1 for the heat medium and the floor panel 3.
Consideration has been taken to increase heat exchange efficiency by increasing the residence time within the chamber. Furthermore, as is clear from Fig. 2, the diameter of the hot water supply pipe 10 is set to be extremely large compared to other pipes, and the volume inside the hot water supply pipe 10 is large enough to accommodate hot water used at one time, such as in a bath. It has a volume greater than the amount of hot water normally used, and the hot water supply pipe 10 also serves as a hot water storage tank.

Next, the operation will be explained. In FIG. 1, the heat medium (for example, water) that has become hot in the solar heat collector 16 due to sunlight is passed through the cushion tank 17 and the pump 18 through the heat collection pipe 19 to the first heat radiation pipe 6, and the heat is stored in the upper part. Heat is radiated through the material 7, and the radiated heat medium returns to the collector 16 via the heat collection pipe 22. Heat is stored by repeating this operation. In order to adjust the circulation of the heat medium depending on the amount of solar radiation, the pump 18 is controlled by a sensor (not shown). Here, since the inner diameter of the first heat dissipation pipe 6 is slightly thicker than that of the heat collection pipes 19 and 22, the flow rate of the high-temperature heat medium in the tank 1 is reduced, and since the heat dissipation area is wide, Heat dissipation efficiency is good.

The heat released to the heat storage material 7 (chestnut stone, crushed stone, etc.) is
The gap (air portion) of the heat storage material 7 is moved upward (mainly due to air convection), and the hot water supply pipe 10 in the tank 1 is
The water in the heat storage pipe 11 for hot water heating is heated. Further heat is transferred to the uppermost concrete plate 12, warming the air within the holes 13. This air is circulated into the floor panel 3 by turning the fan 35 during the winter and is used for floor heating.

The water in the hot water supply pipe 10 is supplied to the faucet 2 at the end when necessary.
From 8 onwards, it is used as hot water. The hot water supply pipe 10 in the heat storage tank has a diameter of, for example, 100φ, and has a volume that can store hot water, for example, for a bath, which is normally required by a general household at one time. However, when the faucet 28 is opened, the hot water filling the hot water supply pipe 10 is pushed out by the water from the pipe 26, so the hot water and water do not mix.

The hot water heated in the heat storage pipe 11 radiates heat for heating in the air conditioner 32 by the circulation pump 33, and then returns to the heat storage pipe 11 via the pipe 26 and circulates. If the temperature of the hot water is insufficient, the three-way valve is switched to circulate the hot water through the boiler 30, and the boiler 30 reheats the hot water to raise the temperature to a temperature sufficient for heating. In this process, if the temperature of the hot water discharged from the air conditioner 32 to the piping 26 is higher than the temperature of the heat storage tank 1, the heat storage tank 1 will receive heat, and the floor heating by the floor panel 3 etc. I am ready to assist.

When there is a need for urgent high-temperature hot water supply due to the temporary use of a large amount of hot water, the heat medium from the collector 16 is circulated through the second heat radiation pipe 9 by closing the valve 20 and opening the valve 21. Second heat sink 9
Since it is close to the heat distribution pipe 14 and directly heated without using the heat storage material 7, rapid heating is possible. Furthermore, when both valves 20 and 21 are opened, the flow area of the heat medium is doubled, which not only increases the heat storage rate but also prevents boiling in the collector 16 during high-temperature heat collection in the summer. Furthermore, both valves 2
By adjusting the opening degrees of 0 and 21, it is possible to control the distribution ratio of the heat amount of the heat medium to the heat storage material 7 and the heat distribution pipes 14.

Note that within the heat storage layer formed by the heat storage material 7, heat transfer to the upper part is accelerated by natural convection of heated air, and the heat is also stored in the heat storage material 7. In this case, if a material with few air spaces, such as earth and sand, is used as the heat storage material 7 instead of chestnut or crushed stone, the heat transfer will be extremely small, resulting in poor efficiency. Chestnut stone, crushed stone, etc. have the property of being difficult to cool down once heated, so they can stably supply heat even if the intensity of solar radiation changes. Of course, the heat storage material 7 is not limited to chestnut stone or crushed stone, and any material having similar properties may be used, for example, metal balls may be used.

As explained above, according to the present invention, the first heat dissipation pipe 6 is arranged at the bottom of the heat storage tank, the heat storage material 7 is placed on top of it, the second heat dissipation pipe 9 is arranged on top of it, and the second heat dissipation pipe 9 is arranged above it or near it. The heat distribution pipes 14 for heat utilization are placed in the radiator pipes 14, and the heat collecting pipes 19 and 22 are freely connected to the heat radiating pipes 6 and 9, so that in addition to normal heat storage,
Since the heat medium for heat utilization (for example, bath water) can be rapidly heated when necessary, there is an advantage that the practicality of the solar heat storage device is improved. Also heat collection piping 19,2
Since the diameters of both the heat dissipation tubes 6 and 9 are made larger than in the case of No. 2, the heat storage efficiency is improved by reducing the flow velocity of the heat medium and increasing the heat dissipation area.

Note that the pipes 6, 9, 10, 11 in the heat storage tank 1 do not need to be embedded in the concrete layers 5, 8.
Further, instead of the concrete plate 12, ordinary piping may be used. However, in these cases, it is necessary to prevent each tube from rubbing against the heat storage material 7 and being damaged as a result of expansion and contraction due to heat. Furthermore, in order to make effective use of the air conditioner 32 even when the heat storage tank 1 is not used, a bypass is provided to connect the outlet of the air conditioner 32 and the inlet of the boiler 30, and the bypass and the circuit inside the heat storage tank 1 are connected. It may be possible to switch freely using a three-way valve or the like.

[Brief explanation of drawings]

FIG. 1 is a partial vertical cross-sectional conceptual side view of a solar heat storage device according to the present invention, and FIG. 2 is a partial cross-sectional view of FIG. 1. 1... Heat storage tank, 6... First heat radiation pipe, 7... Heat storage material, 9... Second heat radiation pipe, 14... Heat distribution pipe, 16...
...Solar heat collector, 19,22...Heat collection piping.

Claims (1)

[Scope of utility model registration request] In a solar heat storage device in which a solar heat collector and a heat storage tank are connected by a heat collection pipe, a first heat dissipation pipe is arranged at the bottom of the heat storage tank, a large amount of heat storage material made of chestnut stone, crushed stone, etc. is placed on top of the first heat radiation pipe, and a 2 heat dissipation pipes are arranged, further a heat distribution pipe for heat utilization is disposed above or near it, and the heat collection pipe is switchably connected to the above first and second heat dissipation pipes, and from the above heat collection pipe. A solar heat storage device characterized in that the diameters of the first and second heat dissipation tubes are increased.