JP2636608B2 - Underground thermal storage tank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground heat storage tank for improving the thermal efficiency of a cooling / heating device in a structure.

[0002]

2. Description of the Related Art Conventionally, a cooling and heating apparatus for a structure is set to have a capacity in time for the maximum peak during operation. However, this is uneconomical, and the capacity of the apparatus is not sufficient for the maximum peak. In addition, the shortage is converted to cold or hot water at midnight when cooling and heating are not used, and a heat storage tank is provided in a double-layered underground floor and stored as a heat source during peak times. For example, as shown in FIG.
The water 17 of the heat medium is stored in a pit 16 provided in the underground part of the structure, and the underground part of the structure is used as a heat storage layer.

[0003]

However, in the above-mentioned heat storage layer, there is a problem that a large space is required to make the pits 16 a heat storage layer and the cost increases.
In addition, there is a defect that thermal stress is generated by the water 17 of the heat medium and cracks are generated on the wall surface of the concrete frame 15.

[0004] The present invention has been made in view of the above problems, and provides an underground heat storage tank that effectively uses a ground layer as a heat storage layer without requiring a large space under the structure. With the goal.

[0005]

The gist of the present invention to solve the above-mentioned problems and achieve the above-mentioned object is to form a lower end of a continuous underground wall which is provided as a ground retaining by cutting off the ground when constructing a structure. Part extending to the water-impermeable layer of the ground to surround the lower soil layer of the structure ,
A heat insulating layer is provided on the side to insulate the surrounding soil layer, and the surroundings are connected to the heat source equipment and the air conditioner by the continuous wall and in the vertical direction, the soil layer surrounded by the underground skeleton of the structure and the impermeable layer. That is, one end of the discharge pipe and one end of the water absorption pipe are penetrated.

[0006]

According to the underground heat storage tank of the present invention, since the heat medium supplied from the heat source equipment is stored in the underground soil layer, the heat storage capacity is increased, and the temperature difference of the heat medium is large as compared with the conventional heat storage method. do not need. Also, inside the continuous underground wall of the structure
Since the heat insulation layer is formed in the
Heat medium stored in the underground heat storage tank without heat
Can be used. In addition, continuous
Since the underground wall is used as it is as an underground heat storage tank, there is no need to construct a double pit as a heat storage tank, which saves time and effort and reduces the weight of the structure itself.

[0007]

Next, the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view of an underground heat storage tank according to the present invention. In the figure, reference numeral 1 indicates an underground heat storage tank, 2 indicates a continuous underground wall,
3 is an impermeable layer, 4 is a soil layer as a heat storage tank, 5 is a heat source equipment, 6 is an air conditioner, 7 is a discharge pipe, 8 is a water absorption pipe, 9 is a ground,
Reference numeral 10 denotes a support layer, 11 denotes a concrete structure, and 12 denotes a heat insulating layer provided inside the continuous underground wall.

In the underground heat storage tank 1 according to the present invention, the lower end 2a of the continuous underground wall 2 is connected to the impermeable layer of the ground 9 when the continuous underground wall 2 is constructed by cutting the ground 9 and retaining the ground. Extend until you reach 3. Then, a heat insulating layer 12 is formed inside the continuous underground wall 2 with a heat insulating material. In order to surround the formation 4 with the continuous underground wall 2, the underground wall 2 may be provided so that the formation 4 is finely divided in a plan view.

When the underground part of the structure 11 is constructed, one end of the discharge pipe 7 and the water absorption pipe 8 communicating with the heat source equipment 5 and the air conditioner 6 are surrounded by the continuous underground wall 2. Penetrate the soil layer 4. Water as a heat medium is injected or absorbed from the ends of the discharge pipe 7 and the water absorption pipe 8, respectively.

In the example shown in FIG. 1, the discharge pipe 7 penetrates deeply between the lower portions of the stratum 4, and the water absorption pipe 8 penetrates shallowly into the stratum 4. Of course, the stratum 4 must be permeable because it is necessary to ensure the inflow and outflow of water.

By constructing the underground heat storage tank 1 in this way, the heat source equipment 5 discharges the continuous underground wall 2 and the formation 4 watertightly surrounded by the bottom of the structure 11 and the impermeable layer 3. The water of the heat carrier is accumulated via the pipe 7. The water accumulated in this stratum 4 is the heat insulating material provided inside the continuous underground wall.
Since the heat insulating layer 12 formed is less susceptible to the heat of the surrounding soil layer , the temperature of the water changes little. Moreover, since the entire formation 4 is used, the heat capacity is large.

The air conditioner 6 is provided with a water suction pipe for cooling and heating.
The water absorbed from 8 keeps substantially the same temperature as the water discharged from the heat source equipment 5, so that the heat is efficiently exchanged by the air conditioner 6 and the size of the device can be reduced. The relationship between water injection and water absorption may be reversed between the discharge pipe and the water absorption pipe 8 depending on the cooling and heating conditions as most convenient.

The soil layer 4 uses the soil of the ground 9 as it is. However, depending on the conditions of the ground, a layer of sand, gravel or gravel may be constructed.

[0014]

As described above, the underground heat storage tank of the present invention is constructed such that the lower end of a continuous underground wall provided as a mountain retaining structure by cutting the ground when constructing a structure is formed by impermeable layer of the ground. It surrounds the bottom of the soil layer of the structure by extending to a result DOO
A heat insulation layer that insulates the surrounding soil layer inside the continuous underground wall
The provided, one end of the soil layer surrounded by the underground building frame and the impermeable layer of the structure in the continuous wall a and the vertical direction around the discharge tube and the suction pipe communicating with the heat source equipment and the air conditioner The thermal shadow of the soil layer around the underground thermal storage tank
The air conditioner is not affected, and a large amount of the heat medium used for the heat source equipment is accumulated and used underground at a temperature close to the use temperature, so that the cooling and heating device can be small.

In addition, since the soil layer of the ground is used as it is as a heat storage tank, the construction cost is low and the weight of the structure can be reduced.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an underground heat storage layer according to the present invention.

FIG. 2 is a longitudinal sectional view of an underground heat storage layer according to a conventional example.

[Explanation of symbols]

1 Underground thermal storage tank, 2 continuous underground wall, 3 impermeable layer, 4
Soil layer as heat storage tank, 5 heat source equipment, 6 air conditioner, 7 discharge pipe, 8 water absorption pipe, 9 ground, 10 support layer, 11 concrete structure, 12 heat insulation layer.

Claims (1)

(57) [Claims] When a structure is constructed, the lower end of a continuous underground wall provided as a mountain retaining structure by cutting the ground to extend to the water-impermeable layer of the ground to form a lower soil layer of the structure. It is surrounded
And insulate the surrounding soil layer inside the continuous underground wall
A heat insulation layer is provided, the periphery of which is the continuous wall and, in the vertical direction, the soil layer surrounded by an underground skeleton of the structure and an impermeable layer,
An underground heat storage tank characterized in that one end of a discharge pipe and one end of a water suction pipe connected to a heat source facility and an air conditioner are penetrated.