JP2003307355A - Radiation pipe device utilizing geothermal heat - Google Patents

Abstract

(57) [Problem] To provide an underground heat utilizing heat radiating pipe device which does not cause unevenness in snow melting, heating, etc. by freely supplying an appropriate amount of heat medium to all heat radiating pipes. SOLUTION: Underground heat is collected by a heat medium supplied to a heat exchanger 2 buried vertically in the ground, and the heat medium is meandered in a hairpin shape directly under a road surface S or the like.
In the underground heat utilization radiating pipe device for supplying the heat via the feed pipe 3 and the return pipe 4 and releasing the heat to melt snow and the like,
A header 5 is provided between the end portions of the feed pipe 3 and the return pipe 4 and each radiator pipe 1 with a flow control valve 6 interposed therebetween.

Description

Description: BACKGROUND OF THE INVENTION [0001] The present invention utilizes geothermal heat that can be collected stably and abundantly throughout the four seasons.
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to an underground heat utilization radiant pipe device capable of effectively performing snow melting and floor heating. [0002] In recent years, a heat exchanger for extracting underground heat has been buried underground, a heat medium has been circulated through the heat exchanger, and the underground heat has been collected with the heat medium to melt snow and floor. A radiator tube device for heating, spot cultivation, animal breeding, air conditioning or hot water supply, and for use in a heated pool has been considered. [0003] Among them, for example, in a radiating pipe device for melting snow, a large number of radiating pipes for releasing the collected ground heat are buried in a hairpin shape right below the road surface. I have. In this radiator tube device, each radiator tube is
It is connected to a feed pipe and a return pipe connected to a heat exchanger, and melts snow on a road by releasing heat of a heat medium circulating therein. [0004] However, since this conventional radiating pipe device is directly connected to the feed pipe and the return pipe, each radiating pipe is connected to the radiating pipe due to a difference in connection between the radiating pipe and the feed pipe. There is a problem that the amount of the heat medium to be sent is different and the snow melting becomes uneven. In addition, when used for floor heating, there is a problem that uneven heating occurs. SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an underground heat utilizing heat radiation pipe which does not cause unevenness in snow melting, heating, etc. by freely supplying an appropriate amount of heat medium to all the heat radiation pipes. It is an object to provide a device. A description will be given with reference to FIGS. 1 to 4. According to the present invention, a large number of radiating pipes 1 are provided, in which ground heat is collected by a heat medium supplied to a heat exchanger 2 buried vertically in the ground, and the heat medium is meandered in a hairpin shape directly under a road surface S or the like. Is supplied through a feed pipe 3 and a return pipe 4,
In the underground heat utilization radiating pipe device which releases the heat to melt snow or the like, a flow control valve 6 is provided between each of the radiating pipes 1 and both or one of the feed pipes 3 and the return pipes 4 and one end thereof. A header 5 to be interposed is provided. FIG. 1 to FIG. 4 show an embodiment of a radiating pipe device utilizing geothermal heat according to the present invention. In this method, the ground heat is collected by a heat medium supplied to a concentric double-pipe heat exchanger 2 buried vertically in the ground, and the heat medium is meandered in a hairpin shape directly under the road surface S. To the radiating pipe 1 through the feed pipe 3 and the return pipe 4, and radiates the heat to melt snow and the like. The heat radiation pipe device is characterized in that a header 5 having a flow control valve 6 interposed therebetween is provided between each of the heat radiation pipes 1 and both ends of the feed pipe 3 and the return pipe 4. . The concentric double-pipe heat exchanger 2 according to the present embodiment supplies a heat medium (antifreeze) at a rate of 20 to 25 liters per minute to its internal pipe 2a. The heat medium supplied to the inner pipe 2a moves downward, returns to the lower end thereof, enters the outer cylinder, collects the ground heat while rising, and reaches the heat radiation pipe 1 through the return pipe 4. In this embodiment, the inner tube 2a is formed of 56 mmφ hard polyethylene, and the outer tube 2b is formed of 90 mmφ hard polyethylene. The feed pipe 3 is provided with a heat medium supply pump 7. Two pumps 7 are provided for four to six heat exchangers 2, and one of them is reserved. The feed pipe 3 or the return pipe 4 includes an expansion tank 8, a pressure gauge 9, a pressure switch 10, a relief valve 11,
An air vent valve 12 and a flow meter 13 are attached.
The expansion tank 8 absorbs a change in the volume of the heat medium, and the pressure switch 10 detects a pressure drop due to leakage of the heat medium M or the like, and automatically stops the pump 7. The radiator tube 1 comprises a forward path 1a connected to the feed pipe 3 and a return path 1b connected to the return pipe 4.
The end of the forward path 1a and the start of the return path 1b are integrally connected. The lengths of the outward section 1a and the backward section 1b are set to be the same, and are provided so as to meander like a hairpin immediately below the road surface S, and the outward section 1a and the backward section 1b are arranged adjacently and parallel over the entire length. . Therefore, since the highest temperature portion and the lowest temperature portion are arranged in parallel, and the intermediate portion is arranged in parallel at the turn-back portion, the heat radiation amount is made uniform over the whole and the snow melting unevenness can be eliminated. The header 5 is formed at a terminal portion of the feed pipe 3 and the return pipe 4, and a flow rate adjusting valve 6 is provided between the feed pipe 3 and each of the outward paths 1a. Similarly, a flow control valve 6 is provided between them. In the underground heat utilization heat radiating pipe device having such a configuration, when the heat medium circulating pump 7 is driven, the heat medium is supplied to the feed pipe 3.
From the heat exchanger 2 to the inner pipe 2a and the outer pipe 2b.
, And passes through the feed pipe 3 to reach the radiator pipe 1. The heat medium radiates heat in the radiator tube 1 to melt snow on the road, reaches the return tube 4, and is sent again to the heat exchanger 2 through the feed tube 3. Thus, geothermal heat is repeatedly collected. Here, since the flow control valve 6 is provided between the feed pipe 3 and the return pipe 4 and each of the heat radiating pipes 1, the control valve 6 is adjusted to pass through each heat radiating pipe 1. The amount of the heat medium can be appropriately set. Therefore, for example, by uniformly setting the amount of the heat medium passing therethrough in all the radiator tubes 1, a uniform amount of heat can be supplied to the road, and uniform snow melting is performed over a wide range of the road surface S. be able to. Also, by supplying a larger amount of heat medium to the heat radiating pipe 1 located at a place with a large amount of snow than the heat radiating pipe 1 located at a place with a small amount of snow, the snow melting on the road surface S can be effectively performed. it can. The flow control valve 6 can be automatically controlled by a computer. The underground heat utilization radiating pipe device according to the present invention is not limited to the use of snow melting, but can be similarly used for floor heating, plant cultivation, animal breeding, air conditioning, and the like. The heat exchanger 2 used in the present invention is not limited to the concentric double tube type, but may be a so-called U-shaped type as shown in FIG. In the U-shape, a partition wall 2d is provided at the center of the tube main body 2c to form two passages 2e, and the heat medium supplied from one passage 2e is discharged from the other passage 2e. The pump 7 can be operated by a solar thermal power generator or an internal combustion engine power generator in addition to a commercial power supply. As shown in FIG. 6, the solar power generation device absorbs sunlight with a solar panel 14, stores electricity in a storage battery 17 in a storage battery box 15 via a control board 16 that operates when charging is required, and requires a controller 18 An amount of power is supplied to the pump 7. The underground heat utilization radiating pipe device according to the present invention is provided with the header 5 having the flow control valve 6 interposed between the feed pipe 3 and the return and each radiating pipe 1. The amount of heat released from each radiator tube 1 can be set freely.
Thus, for example, when used for melting snow, uneven snow melting can be eliminated, and when used for floor heating, uneven heating can be eliminated.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration diagram showing an embodiment of a geothermal heat utilization radiating pipe device according to the present invention. FIG. 2 is a configuration diagram of a main part of FIG. 1; FIG. 3 is a schematic sectional view taken along line AA in FIG. 2; FIG. 4 is a longitudinal sectional view showing a state in which the radiator tube of the embodiment shown in FIG. 1 is buried immediately below a road surface. FIG. 5 is a front sectional view showing another embodiment of the heat exchanger in the underground heat utilization radiator tube device according to the present invention. FIG. 6 is a flowchart of a solar thermal power generation device that operates a pump of the underground heat utilization heat radiation pipe device according to the present invention. [Explanation of Signs] 1 radiator pipe 1a forward pipe 1b return pipe 2 heat exchanger 2a inner pipe 2b outer pipe 2c pipe main body 2d partition wall 2e passage 3 feed pipe 4 return pipe 5 header 6 flow control valve 7 pump 8 expansion tank 9 pressure Total 10 Pressure switch 11 Relief valve 12 Air release valve 13 Flow meter 14 Solar panel 15 Battery box 16 Control board 17 Battery 18 Controller S Road surface

Claims (1)

Claims 1. Underground heat is collected by a heat medium supplied to a heat exchanger (2) buried vertically in the ground, and the heat medium is placed directly under a road surface (S) or the like. An underground heat utilizing radiating pipe device which supplies a large number of radiating pipes (1) meandering in a hairpin shape through a feed pipe (3) and a return pipe (4) and releases the heat to melt snow or the like. A header (5) having a flow control valve (6) interposed therebetween is provided between each of the feed pipe (3) and the return pipe (4) or at least one end thereof and each of the heat radiating pipes (1). Radiation pipe device utilizing geothermal heat.