JP2002372315A - Method and device for practically utilizing subterranean heat by utilizing foundation pile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To resolve a problem on a cost performance, such as installation cost and maintenance control cost, since clean subterranean heat of the subbase of a building, although stably obtained at a constant temperature throughout a year, is low in thermal efficiency. SOLUTION: The internal part of a foundation pile, not utilized heretofore, is utilized. By slowly and constantly circulating air high in safety, having stability, easily handled, and low in expenses, the cost performance is improved. The subterranean heat at the periphery of the foundation pile is recovered and stored under a floor, and is utilized for cooling, heating, and a feed of hot water, throughout a year.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for utilizing geothermal energy.

[0002]

2. Description of the Related Art Conventionally, foundation piles have been conceived only to support the load of a building and have been driven into the ground. In addition, there is a construction method in which a dedicated pipe is buried to circulate the refrigerant liquid in order to utilize geothermal energy. (For example, see Japanese Patent Application Laid-Open No. 06-137689)

[0003]

Although the calorific value is small,
It can provide stable and clean geothermal throughout the year at an inexpensive cost and simple and easy to maintain.

[0004]

SUMMARY OF THE INVENTION The present invention utilizes the inside of a foundation pile that has not been used in the past, and slowly and constantly circulates air that is safe, stable, easy to handle, and inexpensive. The geothermal energy around the pile is collected and stored under the floor, and used for cooling, heating and hot water supply throughout the year.

[0005]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a foundation pile laid on the entire building (1) a foundation pile at the lower part (2) a pipe for blowing air in a hollow part (3)
And air is circulated by blowing air from a blower (10) installed in a heat storage tank (4) under the first floor of the building to take in geothermal heat around the foundation pile, and heat insulating material with concrete (8) for heat storage ( A geothermal utilization method that uses a foundation pile that is stored in the heat storage tank (4) surrounded by 9) and blown directly from the blower fan (13) as needed, or used for cooling and heating or hot water supply of the building through a heat exchanger And take out the device and use it for air conditioning.

FIG. 2 is an enlarged sectional view of the building foundation (1) and the foundation pile (2) of FIG. The tip of the foundation pile (2) is closed and groundwater does not enter. The pile head is covered with a circulation ventilation pipe (6) having a cross section of about half the diameter of the foundation pile and a cap plate (5) in which a ventilation pipe (3) is integrated. In addition, for the shortage of the load receiving area due to the pipe attachment, the plane area of the cap plate (5) is increased, the reinforcing bracket (5-a) is attached to the head of the foundation pile, and the reinforcing steel bar (7) is inserted to secure the strength. The tip of the blower pipe (3) to be inserted into the foundation pile is wide, and holes for blower are opened on all sides. The connection of the cap plate (5) can be made by screwing. The same applies to the connection from the heat storage tank side.

[0008]

The present invention is embodied in the form described above, and has the following effects. (A) The cost is low because the inside of the foundation pile, which has not been used conventionally, is used. (B) The maintenance and management cost is low because air that is safe, stable, easy to handle, and inexpensive is used for the heat medium. (C) Clean, inexhaustible and free geothermal energy can be utilized throughout the year. (D) By sending and circulating the solar heat obtained from the roof and walls to the underfloor heat storage tank, a large amount of heat can be stored in the soil around the foundation pile, which is effective for nighttime heating in winter.

[Brief description of the drawings]

FIG. 1 is a sectional view of a foundation and an underground portion of a building incorporating the present invention.

FIG. 2 is an enlarged sectional view of a building foundation and a foundation pile portion of FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 building foundation 2 foundation pile 3 blower pipe 4 heat storage tank 5 cap plate 5-a reinforcing bracket 6 circulation ventilation pipe 7 reinforcing steel bar 8 heat storage concrete 9 heat insulating material 10 blower 11 soil 12 heat exchanger 13 blower fan

Claims (2)

[Claims] 1. A ventilation pipe (3) is inserted into a foundation pile (2), which is driven into the lower soil (11) of a building foundation (1) and whose tip is closed, and a heat insulating material ( The air inside the heat storage tank is forcibly sent from the blower (10) installed inside the heat storage tank (4) having the heat storage concrete (8) surrounded by the heat storage tank (9) to the blowing pipe (3) of each foundation pile. ,
Slowly circulate and capture and store geothermal heat with little temperature change throughout the year around the foundation pile, and direct blow fan (13)
A geothermal utilization method and equipment using foundation piles that are used for cooling or heating or hot water supply of buildings through a fan or through a heat exchanger. 2. The head of a foundation pile (2) that supports the load of a building is formed by integrating a ventilation pipe (6) having a cross section of about half the diameter of the foundation pile with a ventilation pipe (3) inside. Cover with the cap plate (5). In addition, the shortage of the load receiving area due to the installation of the pipe increases the flat area of the cap plate (5), and the reinforcing bracket (5-
a) A geothermal utilization method and device using a foundation pile to secure strength by attaching a reinforcing bar (7).