JPS59157442A - Geothermal system - Google Patents

Abstract

PURPOSE:To save energy by a method wherein the lowering of the temperature in the space under the floor of a building or in a hot house is prevented by utilizing geothermal heat. CONSTITUTION:A pipe A is made of a material having a high heat transfer efficiency and subject to the transmission of geothermal heat and the lower end of the pipe A is sealed against the entry of water or moisture in the ground and embedded vertically into the ground. A pipe B is insulated from heat to a sufficient degree so that no heat exchange takes place between air flowing through the pipe B and air flowing through a gap (d) between the pipes A and B. The lower end of the pipe B is provided with a recess 1 and the pipe B is so inserted into the pipe A that the space within the pipe B communicates with the gap (d) through the recess 1. The upper end of the pipe B is sealed and provided with a plurality of vent pipes 2 so that the air moving downward through the pipe B and the air moving upward through the gap (d) are prevented from being short-cycled. Consequently, when the temperature in the underfloor space or in the hot house above the ground is lower than that in the ground, the chill above the ground flows down within the pipe B through the vent pipes 2 and the air within the gap (d) is heated due to the temperature in the ground 3 through the pipe A and moves upward above the ground.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is intended to prevent the temperature of spaces under floors of buildings, greenhouses, etc. from dropping during the winter by utilizing underground heat.

In winter, the temperature of spaces under the floors of buildings, greenhouses, etc. usually decreases with the drop in outside temperature, but on the other hand, the temperature underground varies somewhat depending on the region, but even in winter the temperature below ground level is about 2 to 3 meters above ground. The temperature is maintained at around 10℃ to 15℃. The purpose is to provide a system that utilizes this underground heat to prevent a drop in temperature in the floor spaces of buildings, greenhouses, etc. and contributes to energy conservation.

To explain in detail based on the drawings, FIG. 1 is a cross-sectional view of the present invention; FIG. 2 is a cross-sectional view taken along the line x-x' of FIG. 1. Pipe A is made of a material with high thermal conductivity, such as aluminum or copper, so that it can easily conduct heat underground. The lower end of pipe A is sealed to prevent moisture from entering the soil.
It is buried vertically into the soil. Pipe B is sufficiently insulated, and is designed to prevent heat exchange between the air flowing within pipe B and the gap d formed between pipe A and pipe 8. A plurality of notches 1 are provided at the lower end of the pipe B, and a gap in the pipe B and a gap d are communicated through the notches 1, and the vibe Ba is inserted into the vibe A. The upper end of the pipe B is shaded, and a plurality of ventilation pipes 2 are provided around a part of the pipe B to prevent a short cycle between the descending air and the ascending air.

FIG. 2 is a sectional view taken along the line x-x' in FIG. 1. In addition, Figures 3 and 14 show the implementation using At with fins provided inside and outside of the outer heat exchange pipe A and A2 with a wavy structure in order to obtain a larger amount of heat from the soil. FIG. 3 is an example cross-sectional view.

Let's take a look at the effects of the embodiment of the present invention configured in this way.

When the temperature above ground, such as in an underfloor space or a greenhouse, decreases and becomes lower than the temperature underground, the cold air above the ground passes through the ventilation pipe 2,
It begins to descend inside the insulated pipe B. On the other hand, the void d
The air inside the soil is heated by the conduction of the temperature in the soil through pipe A, which has good thermal conductivity, and begins to rise to the ground, causing it to rise to the ground as shown in Figure 1. A sequence of events in which the cold air from Yu descends through the insulated pipe B through the ventilation vibrator 2, rises through the gap d through the notch 1, is warmed by the underground temperature, and returns to the ground as warm air. This system generates air circulation that warms the cold air above the ground using heat from the ground, preventing the temperature in the underfloor space, greenhouse, etc. from dropping, and contributing to energy savings.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of an embodiment of the present invention, and Fig. 2 is a cross-sectional view of the embodiment of the present invention.
-x' cross-sectional view, Figures 3 and 4 are cross-sectional views of other embodiments of the present invention A...heat exchange pipe, B...insulated pipe, d...
Gap, AI/A2... Heat exchange pipe 1... Notch 2... Ventilation pipe 3... Underground ground 4... Ground space such as underfloor space Patent applicant... Air Cycle Co., Ltd. Systems Representative Director 1) Keiaki Naka Co., Ltd. Orii Architects Representative Director Tsunekazu Orii

Claims (1)

[Claims] A pipe A with good thermal conductivity, the bottom of which is sealed and the top end is open, is buried vertically in the ground such as the floor F of a building, and a vibrator B is placed so that a void d is formed around the inside of the pipe A. A ventilating notch 1 is provided at the bottom, and an insulated pipe B, which has a plurality of vent pipes 2 sealed at one end and communicating horizontally between the pipes, is inserted into the pipe A, and the pipe A is inserted into the pipe A, and the bottom end is sealed. −
When the temperature of Since the temperature of 5 degrees in the soil is conducted through pipe A, which has good thermal conductivity, the air that has entered the gap d is warmed.
A geothermal utilization system that raises warm air and returns it to the ground, preventing the temperature of the space under the floor from dropping.