JP4929494B2 - Circulation type heat absorption / dissipation device using underground heat - Google Patents

Description

  The present invention relates to a circulation type heat absorbing / dissipating device using underground heat. More specifically, a concrete aquarium that can store the heat transfer fluid can be buried in the ground shallow to achieve a reduction in construction costs, while heat transfer from the relatively high temperature surrounding ground to the heat transfer fluid can be achieved. While it can be generated efficiently, heat transfer from the heat transfer fluid can be efficiently generated with respect to the surrounding ground with relatively low temperature. The present invention relates to a circulating heat absorbing / dissipating device using ground heat that can efficiently perform snow melting in a region to be heated and cooling in a region to be absorbed, such as a pavement.

  As a system for performing non-sprinkling snow melting using underground heat at a depth of 5 m from the ground surface, for example, a system disclosed in Japanese Patent Application Laid-Open No. 2006-2539 has been proposed.

  The system uses an existing septic tank that is no longer necessary as a means for storing the heat transfer fluid, and is laid in a snow melting area, and the heat absorbing and radiating pipe through which the heat transfer fluid flows, A septic tank that is embedded in the heat storage medium and can store the heat transfer medium liquid, and a pump that sends the heat transfer medium liquid in the septic tank to the inlet part of the heat absorption / radiation pipe and returns the heat transfer medium liquid from the outlet part of the heat absorption / radiation pipe The structure which comprises a part was adopted.

  When using such a non-sprinkling snow melting system, heat transfer from the surrounding ground having a relatively high temperature to the septic tank is utilized, and the heat transfer liquid cooled for snow melting in the process of passing through the heat absorbing and radiating pipe is When the temperature of the heat transfer liquid flowing into the septic tank and stored in the septic tank decreases, the heat transfer liquid is warmed by the heat transfer and snow melting is performed with non-sprinkling water.

However, since this non-sprinkling snow melting system was of a system that reuses an existing septic tank, the septic tank was only buried in the ground with its outer surface in direct contact with the soil, There was room for improvement in terms of heat transfer efficiency from the surrounding ground to the septic tank.
JP 2006-2539 A

  The present invention has been developed in view of the above-described conventional problems, and while achieving reduction in construction cost, it is possible to absorb heat from snow melting in a region to be radiated, such as a roadway or a parking lot, and a pavement. The present invention relates to a circulation type heat absorption / dissipation device using underground heat that can efficiently perform cooling in a power region.

In order to solve the above problems, the present invention employs the following means.
That is, the circulating heat absorbing / dissipating device using ground heat according to the present invention (hereinafter referred to as the circulating heat absorbing / dissipating device) has an upper surface portion at a depth of 0.5 to 2 m from the ground surface and a lower surface portion. A concrete water tank that is buried in the ground so as to exist at a depth of 5 m from the ground surface and can store the heat transfer liquid, and is embedded in an area to be radiated or an area to be absorbed, and the heat transfer liquid is The heat absorbing / dissipating pipe flowing inside, and the pump for sending the heat transfer medium in the water tank to the heat absorbing / dissipating pipe and returning the heat transfer medium in the heat absorbing / dissipating pipe to the water tank. And, excluding the upper surface portion of the water tank, a high heat conductive layer made of gravel and / or sand having a thermal conductivity of 5 W / (m · k) or more is provided so as to cover at least the side surface of the water tank, The high heat conductive layer is characterized in that the side surface covers at least a width portion of 50 to 80% forming a lower portion of the vertical width thereof.

  In the circulation type heat absorbing / dissipating device, it is preferable that the high heat conductive layer covering the side surface of the water tank is provided on a lower side portion of the side surface of the water tank except a range portion having a depth of 1 m from the ground surface.

  When the upper surface of the water tank is at a depth of 1 to 2 m from the ground surface, the high heat conductive layer covering the side surface of the water tank is thin and the upper part of the side surface of the water tank is thin and lower when viewed from the side. Should be thick.

  In each of the circulation type heat absorbing / dissipating devices, the foundation for installing the lower surface of the water tank is made of gravel and / or sand in the accommodating portion of the concrete foundation provided with the accommodating portion whose upper and lower ends are opened. It is preferable that the high thermal conductive layer is filled.

  In each of the circulation type heat absorbing / dissipating devices, a heat insulating material layer made of a synthetic resin foam may be provided on the upper surface of the water tank.

  In each of the circulation type heat absorbing / dissipating devices, it is preferable that an internal gap of a gravel layer constituting the high thermal conductive layer is filled with sand constituting the high thermal conductive layer.

  In each of the circulation type heat absorbing / dissipating devices, the concrete water tank is preferably configured using a mixture of gravel and sand having a thermal conductivity of 5 W / (m · k) or more as a main aggregate.

  In each of the circulation type heat sinks, it is preferable to use silica stone as the gravel and silica sand as the sand.

  A fireproof water tank can be used as the water tank.

The present invention has the following excellent effects.
(1) When using the circulation type heat absorbing / dissipating device according to the present invention, a concrete water tank that can store the heat transfer fluid may be buried in the ground shallowly, while achieving a reduction in construction cost, relatively Heat transfer from the surrounding ground having a high temperature to the heat transfer fluid can be efficiently generated, while heat transfer from the heat transfer solution to the surrounding ground having a relatively low temperature is efficiently generated. Thus, it is possible to efficiently perform snow melting in a region where heat is to be radiated, such as a roadway or a parking lot, and cooling in a region where heat is to be absorbed, such as a pavement.

(2) In the circulation type heat absorbing / dissipating device according to the present invention, the high heat conductive layer is provided on the lower portion of the side surface of the aquarium except for the range of a depth of 1 m from the ground surface without being affected by the surface heat. There is an advantage that geothermal heat can be used more efficiently.

(3) In the circulation type heat absorbing / dissipating device according to the present invention, when the upper surface of the water tank is at a depth of 1 to 2 m from the ground surface, the heat conduction layer covering the side surface of the water tank is By providing the upper part thin and the lower part thick, there is an advantage that the underground temperature can be effectively utilized while reducing the construction cost.

(4) A high heat conduction layer made of gravel and / or sand was filled in the receiving part of the concrete foundation provided with a receiving part with the upper and lower ends opened, as a foundation part for installing the lower surface part of the water tank. By adopting the configuration, efficient heat transfer through the lower surface of the water tank is also ensured.

(5) When a heat insulating layer made of a synthetic resin foam is provided on the upper surface of the water tank, the upper surface portion that is easily affected by surface heat can be effectively insulated, and the influence of surface heat can be blocked.

(6) When the internal gap of the gravel layer constituting the high heat conduction layer is filled with the sand constituting the high heat conduction layer, there is an advantage that the efficiency of heat transfer by the high heat conduction layer can be improved.

(7) If the water tank is made of concrete with a main aggregate of gravel (preferably silica) and sand (preferably silica sand) with a thermal conductivity of 5 W / (m · k) or more, the required thermal efficiency As a result, the water tank can be reduced in size while the circulation type heat absorbing / dissipating device can be configured more compactly.

  1 to 3, a circulation type heat absorbing / dissipating device 1 according to the present invention includes a concrete water tank 2 buried shallowly in the ground, and a region to be radiated or a region to be absorbed (hereinafter referred to as a heat absorbing / dissipating region) 3. And a pump 7 for circulating a heat transfer fluid (water, antifreeze liquid, etc.) 6 between the heat absorbing and radiating pipe 5 and the water tank 2, and an upper surface portion 9 of the water tank 2. Except for the above, the high heat conductive layer 11 on the side is provided so as to cover at least the side surface 10 of the water tank 2.

  The concrete water tank 2 may be made of ordinary concrete using ordinary aggregate, but in this embodiment, the aggregate has high thermal conductivity, for example, thermal conductivity of 5 W / (m · k) or more. The aggregate is preferably made of concrete having an aggregate of a mixture of quartzite and quartz sand having a thermal conductivity of about 6 W / (m · k). In the present embodiment, the ratio of silica stone and silica sand is set to 50:50, more preferably 46:54. Incidentally, the heat conductivity of ordinary concrete is about 1.6 W / (m · k), whereas the heat conductivity of concrete composed of a mixture of silica and silica sand is about 3.26 W / (m · k). k).

  For example, as shown in FIG. 3, the water tank 2 having such a configuration is constructed on the foundation portion 15 provided at the bottom of the construction space 13 formed by excavating the ground, and then backfilled with the earth and sand 16, In other words, it is buried shallowly. In this embodiment, as shown in FIGS. 1 to 3, the aquarium 2 has a plurality of precast concrete box-shaped culvert member-like intermediate members 17 on the foundation portion 15 to ensure watertightness. In addition, the end members 20 and 20 made of precast concrete are joined so as to close both ends of the joined body 19 of the intermediate member. For example, the intermediate member 17a located at one end includes a water tank. 2 is provided with a manhole 21 serving as an entrance and exit, and a cylindrical member 22 having a cylindrical shape is erected so as to communicate with the manhole 21, and the upper end of the cylindrical member 22 is closed with a lid 23. ing.

  In the present embodiment, as shown in FIGS. 1 to 4, the foundation portion 15 has a thermal conductivity of 5 W / (m) inside the two strip-shaped concrete foundations 26, 26 continuous along the long side. K) The high thermal conductive layer 11 composed of the above gravel 27 and / or sand 29 is filled and configured. The upper surface 30 of the base portion 15 is formed horizontally and is in close contact with the lower surface portion 31 of the water tank 2. Silica stone is used as the gravel 27, and silica sand is used as the sand 29. In this embodiment, the ratio of the silica stone and the silica sand is set to 50:50, more preferably 46:54. As shown in (B), sand 29 is filled in the internal gap 33 of the gravel layer 32 to improve the efficiency of heat transfer.

  The upper surface portion 9 of the water tank 2 constructed in this way is set to about 1 m in the present embodiment so as to be at a depth of 0.5 to 2 m from the ground surface 36. Further, the lower surface portion 31 of the water tank 2 is set to have a depth of about 3.4 m in the present embodiment so as to have a depth of 5 m from the ground surface 36.

  If the depth from the ground surface 36 is smaller than 0.5 m, the earth covering thickness is smaller than 0.5 m, so that the influence of the heat from the ground surface 36 is increased and the heat efficiency of the heat medium in the water tank 2 is poor. It is not preferable. Further, if the depth from the ground surface exceeds 2 m, the earth covering thickness exceeds 2 m and there is no influence of heat from the ground surface. And if the depth of the lower surface part 31 of a water tank exceeds 5 m from the ground surface 36, it will cause an increase in construction cost and is not preferable.

  In the present embodiment, as shown in FIGS. 2 and 5 to 6, the heat absorbing / dissipating region 3 is formed by arranging a required number of concrete panels 37 constituting a sidewalk surface 38 on a leveled walking board 39. The concrete panel 37 is an aggregate having a thermal conductivity of 5 W / (m · k) or more, preferably a mixture of silica and gravel (in this embodiment, the ratio of silica and silica sand is 50:50, more preferably Is set as 46:54) and is formed as a rectangular rectangular panel made of concrete. As shown in FIG. 7, the heat absorbing and radiating pipe 5 through which the heat transfer liquid 6 flows is embedded in the concrete panel 37 in a meandering state. As shown in FIGS. 5 to 6, a required number of concrete panels 37 having such a configuration are laid out on a leveled road board 39, and one end 40 of the heat absorbing / dissipating pipe 5 is buried underground. While connecting to one pipe body 41, the other end part 42 is connected to the other pipe body 43, and the heat absorption / radiation area 3 of a sidewalk is constructed.

  The end portion 41 a of the one tube body 41 and the end portion 43 a of the other tube body 43 are both disposed in the water tank 2 at a required interval and opened in the heat transfer liquid 6. . In the present embodiment, the opening 45 of one tube body 41 is positioned on the upper side, and the opening 46 of the other tube body 43 is positioned on the lower side. The pump 7 is disposed at an intermediate required portion of the one tube body 41 or the other tube body 43. In the present embodiment, the pump 7 is disposed on the other tube body 43. By driving the pump 7, the heat transfer fluid 6 in the water tank 2 is sent to one end 40 (FIG. 5) of the heat absorbing / dissipating pipe 5 and the other end 42 of the heat absorbing / dissipating pipe 5. Is returned to the water tank 2.

  In this embodiment, the water in the aquarium 2 is warm on the upper side and cold on the lower side. Therefore, in the winter season, the warm water is supplied to the upper opening 45 as the inlet by the forward drive of the pump 7. While feeding to the heat absorption and radiation pipe 5, the heat transfer fluid is returned into the water tank 2 from the opening 46 located below. On the contrary, in the summer, by reverse driving of the pump 7, the heat transfer fluid 6 in the water tank is supplied to the heat-absorbing and radiating pipe 5 from the inlet as the opening 46 positioned below and positioned above the The structure which returns a heat-medium liquid in the water tank 2 from the outflow port as the opening 45 to perform is employ | adopted.

  In the present embodiment, as shown in FIGS. 1 and 2, the side high thermal conductive layer 11 covering the side surface 10 of the water tank 2 is provided with a thin upper portion on the side surface 10 and a thick lower portion, for example, It is provided in steps. The thermal conductive layer 11 is made of gravel and / or sand having a thermal conductivity of 5 W / (m · k) or more. In this embodiment, as shown in FIG. 4B, the gravel layer 32 made of silica stone. The inner gap 33 is filled with sand 29 made of silica sand to improve heat transfer efficiency.

  When providing the high thermal conductive layer 11 having such a configuration, as shown in FIG. 8, at the bottom of the construction space 13, for example, the first high thermal conductive layer having a rectangular cross section of about 30 cm thickness and about 100 cm width is provided. 11 a is formed so as to surround the side surface 10. Thereafter, the earth and sand 16 is backfilled to the height of the upper surface 50 of the first stage high thermal conductive layer 11a. Thereafter, as shown in FIG. 9, a second high thermal conductive layer 11 b having a thickness of about 30 cm and a width of about 88 cm is formed on the upper surface 50 so as to surround the side surface 10. Then, the earth and sand 16 is backfilled to the height of the upper surface 51 of the second stage high thermal conductive layer 11b. This is sequentially repeated, and as shown in FIGS. 1 and 2 and FIG. 10, the third stage high thermal conductive layer 11c, the fourth stage high thermal conductive layer 11d, the fifth stage high thermal conductive layer 11e, and the sixth stage high thermal conductivity layer. The conductive layer 11f, the seventh-stage high heat conductive layer 11g, and the eighth-stage high heat conductive layer 11h are formed so as to become narrower as they go upward. The width of the eighth stage high thermal conductive layer 11h is set to about 13 cm. After forming the uppermost 8th stage high thermal conductive layer 11h, the earth and sand 16 is backfilled to the height of the upper surface 53 thereof.

  Thereafter, a heat insulating material layer (having a thermal conductivity of, for example, 0.028 W / (m · k)) 55 made of, for example, a synthetic resin foam having a thickness of 20 mm is provided on the upper surface portion 9 of the water tank 2. Since the upper surface portion 9 of the water tank 2 is easily affected by surface heat, in this embodiment, not only the high heat conductive layer 11 is not provided on the upper surface portion 9, but the heat in the water tank 2 moves to the surface 36 side. The heat insulating material layer 55 is positively provided to make it difficult to perform. In this embodiment, since the manhole 21 is provided as described above, the heat insulating material layer 55 is provided so as to cover the outer surface 56 of the cylindrical member 22, and the lower surface 57 of the lid 23 is covered. Thus, the heat insulating material layer 55 is provided.

  Thereafter, the earth and sand 16 is backfilled over the upper part of the water tank 2 and the entire periphery thereof. Thereby, the circulation type heat absorbing / dissipating device 1 in which the upper surface portion 9 of the water tank 2 exists at a depth of about 1 m from the ground surface 36 and the lower surface portion 31 of the water tank 2 exists at a depth of about 3.4 m from the ground surface 36 is configured. Will be.

  The operation of the circulation type heat absorbing / dissipating device 1 having such a configuration will be described based on FIG. 2 by dividing it into an operation at the time of snow melting in winter and an operation at the time of cooling the pavement in summer.

  That is, in the winter season, the underground temperature of the surrounding ground (hereinafter referred to as the surrounding ground) 58 in which the water tank 2 is embedded is the surface temperature of the heat absorbing / dissipating area 3 that requires snow melting (the pavement 59 by the concrete panel 37). Relative to the temperature of the surface 61). Therefore, when the pump 7 is driven, the heat medium liquid 6 that has been cooled for melting snow in the process of passing through the heat absorbing and radiating pipe 5 flows into the water tank 2, and thus the heat stored in the water tank 2. Although the temperature of the liquid medium 6 is lowered, heat transfer from the peripheral ground 58 having a relatively high temperature to the water tank 2 occurs, and the heat medium liquid 6 in the water tank 2 is gradually warmed. Then, the heating medium liquid warmed in this way is sent to the heat absorbing and radiating pipe 5. As described above, the heat transfer is performed in close contact with the side high heat conductive layer 11 provided to cover the side surface 10 of the water tank and the lower surface part 31 of the water tank, and the lower high heat conductive layer 11. Will be performed efficiently. According to the results of experiments conducted by the inventor, for example, in the Hokuriku region, the temperature of the surrounding ground was 6 to 8 ° C. in the winter and 6 to 14 ° C. in the summer.

  Conversely, in the summer, the underground temperature of the surrounding ground (peripheral ground) 58 where the water tank 2 is buried is the surface temperature of the region to be endothermic (the temperature of the surface 61 of the pavement 59 to be cooled). ) Is relatively lower. For this reason, when the pump 7 is driven, the liquid medium 6 raised in the process of cooling the surface 61 of the pavement through the heat absorbing and radiating pipe 5 flows into the water tank 2 and is stored in the water tank 2. However, heat transfer from the water tank 2 occurs with respect to the surrounding ground 58 having a relatively low temperature, and the heat medium liquid 6 in the water tank 2 gradually increases in temperature. Decreases. Then, the heat medium liquid 6 cooled in this way is sent to the heat absorbing and radiating pipe 5. As described above, the heat transfer is also performed in close contact with the side high heat conductive layer 11 provided to cover the side surface 10 of the water tank and the bottom surface part 31 of the water tank, and the lower high heat conductive layer 11. It will be done efficiently.

  In the present embodiment, as described above, the high thermal conductive layer 11 on the side portion provided so as to cover the side surface 10 of the water tank is provided with the upper part of the side face 10 of the water tank 2 being thin and the lower part being thick. The reason is as follows. That is, in this embodiment, the upper surface portion 9 of the water tank 2 is at a depth of 1 m from the ground surface 36 and the lower surface portion 31 of the water tank 2 is at a depth of 3.4 m from the ground surface 36. As the temperature is closer to the ground surface 36, the underground temperature tends to be lower in winter and higher in summer. Therefore, in view of the fact that the amount of heat transfer does not particularly increase even when the high thermal conductive layer 11 is formed thick, the gravel or sand (silica stone or The amount of silica sand) is being reduced.

  In the present embodiment, the water tank 2 is made of concrete using an aggregate having high thermal conductivity such as quartz stone. Therefore, unlike the water tank made of ordinary concrete, the heat transfer through the water tank 2 is further improved. It will be done efficiently.

  Further, in this embodiment, since the internal gaps of the gravel layer constituting the high heat conductive layer 11 are filled with sand, the high heat conductive layer 11 has almost no air layer as a heat insulating layer. The heat transfer is performed more efficiently.

  The present invention is by no means limited to those shown in the above-described embodiments, and it goes without saying that various design changes can be made within the scope of the claims. One example is as follows.

(1) FIGS. 11 to 12 and FIG. 13 show other modes when the side surface 10 of the water tank 2 is covered with the high thermal conductive layer 11.

  11 to 12 show a case where the upper surface portion 9 of the water tank 2 is at a depth of 0.5 to 1 m from the ground surface 36, and the high heat conductive layer 11 is from the ground surface of the side surface 10 of the water tank 2. It is provided in the lower portion 62 excluding the range portion having a depth of 1 m. FIG. 11 shows a case where the upper surface portion 9 is at a depth of 0.5 m from the ground surface 36, and the high heat conductive layer 11 is provided in the lower portion 62 that forms a width portion of 50% of the vertical width of the side surface 10. Yes. 12 shows the case where the upper surface portion 9 is at a depth of 0.8 m from the ground surface 36, and the high thermal conductive layer 11 is provided in the lower portion 62 which forms a width portion of 80% of the vertical width of the side surface 10. ing.

  FIG. 13 shows a case where the upper surface portion 9 of the aquarium 2 is at a depth of 1 to 2 m from the ground surface 36, for example, a depth of 2 m, and over the entire side surface 10 of the aquarium 2, The high thermal conductive layer 11 is provided with the same thickness in a side view.

  Thus, the structure which covers the side surface 10 of the water tank 2 with the high heat conductive layer 11 relates to the embedding depth of the water tank 2, and the upper surface portion 9 is at a depth of 0.5 to 1 m from the ground surface 36. Because of being easily affected by surface heat, the high heat conductive layer 11 is provided in the lower portion 62 of the side surface 10 of the water tank 2 except at least a range portion having a depth of 1 m from the ground surface. . 11 to 12 are provided in a single stage, but as shown in FIG. 14, they may be provided in a plurality of stages that are thinner toward the upper side as viewed from the side, or may be provided in a uniformly changed state as shown in FIG. Moreover, when the upper surface part 9 of the said water tank 2 exists in the depth of 1-2 m from the ground surface 36, as shown in the said FIG. 13, it has the same thickness by the side view over the whole side surface 10 of the water tank 2. The high heat conductive layer 11 is provided or, as shown in FIG. 16, the upper side of the side surface 10 of the water tank 2 is thin and the lower part is thick as viewed from the side. In any case, the high thermal conductive layer 11 is provided so as to cover at least the side portion 10 with a width portion of 50 to 80% forming the lower portion of the vertical width thereof.

(2) In the present invention, providing the upper part of the side surface 10 of the water tank 2 thinly and the thicker the lower part thereof is preferable in consideration of workability, as shown in FIGS. However, it may be provided in a uniform change state as shown in FIG. Moreover, when providing in step shape, as shown in FIG. 18, it may provide in two steps.

(3) In addition to being embedded in the concrete panel 37 as shown in FIG. 7, the heat absorbing / dissipating pipe 5 may be embedded in a concrete layer formed by in-situ casting.

(4) When installing the water tank 2, as shown in FIG. 19, only the square frame-shaped peripheral portion of the foundation portion 15 is configured as the concrete foundation 26, and the storage portion 64 with the upper and lower ends opened between them is heated. The case where the conductive layer 11 is filled is shown. FIG. 20 shows a case where two parallel concrete foundations 26 and 26 are provided in parallel, and the high heat conduction layer 11 is filled in the accommodating portion 64 between which the upper and lower ends are opened. In these cases, the concrete foundation 26 is composed of, for example, an aggregate having a thermal conductivity of 5 W / (m · k) or more, preferably silica stone having a thermal conductivity of about 6 W / (m · k). It is better to use foundation concrete with a mixture of silica sand.

  Further, the water tank 2 may be installed on the foundation portion 15 made of a concrete foundation 26 as shown in FIG. In this case, the concrete foundation 26 is made of, for example, an aggregate having a thermal conductivity of 5 W / (m · k) or more, preferably silica stone and quartz sand having a thermal conductivity of about 6 W / (m · k). It is better to use a concrete foundation with an aggregate of

  When the foundation portion 15 is formed using the concrete foundation 26, the concrete foundation 26 may be formed by laying a precast concrete plate in addition to being formed using the cast-in-place concrete.

(5) The water tank 2 may be installed on the foundation part which consists only of the high heat conductive layer 11 without the concrete foundation 26 being provided.

(6) Gravel and / or sand having a thermal conductivity of 5 W / (m · k) or more used in the present invention includes those using iron ore or granite.

(7) The high thermal conductive layer 11 includes those composed only of gravel such as silica.

(8) The water tank 2 may have a cubic shape, a cylindrical shape, or the like in addition to the rectangular parallelepiped shape described above. The water tank 2 may be constructed by on-site construction. Further, the lower surface portion 31 of the water tank 2 may be provided with a suction tube insertion recess for internal cleaning or the like.

(9) The water tank 2 can also be configured using a fireproof water tank.

It is a longitudinal cross-sectional view explaining the circulation type heat absorbing / dissipating device according to the present invention. It is a cross-sectional view explaining the circulation type heat absorbing / dissipating device according to the present invention. It is a perspective view which shows the water tank constructed | assembled on the foundation part provided in the bottom part of construction space. It is a perspective view which shows the structure of a base part. It is a top view explaining a heat absorption / radiation area. FIG. It is a perspective view which shows the concrete panel which comprises a heat absorption / radiation area. It is sectional drawing which shows the state in which the high heat conductive layer of the 1st step was formed. It is sectional drawing which shows the state in which the 2nd high heat conductive layer was formed. It is a fragmentary sectional view which shows the state which formed the whole high heat conductive layer and embedded the water tank in the ground. It is sectional drawing which shows the other aspect which covered the side surface of the water tank with the high heat conductive layer. It is sectional drawing which shows the other aspect which covered the side surface of the water tank with the high heat conductive layer. It is sectional drawing which shows the other aspect which covered the side surface of the water tank with the high heat conductive layer. It is a fragmentary sectional view which shows the other aspect which covered the side surface of the water tank with the high heat conductive layer. It is a fragmentary sectional view which shows the other aspect which covered the side surface of the water tank with the high heat conductive layer. It is a fragmentary sectional view which shows the other aspect which covered the side surface of the water tank with the high heat conductive layer. It is a fragmentary sectional view which shows the other aspect which covered the side surface of the water tank with the high heat conductive layer. It is a fragmentary sectional view which shows the other aspect which covered the side surface of the water tank with the high heat conductive layer. It is the perspective view and sectional drawing which show the foundation part which formed the concrete foundation in the shape of a square frame. It is a perspective view which shows the foundation part which provides the two concrete foundations in parallel. It is sectional drawing which made the whole lower surface part of a water tank contact state on the foundation part which consists of concrete foundations.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Circulation type heat absorption / radiation device 2 Water tank 3 Absorption / radiation area 5 Absorption / radiation pipe 6 Heat transfer fluid 7 Pump 9 Water tank upper surface part 10 Water tank side surface 11 High heat conduction layer 12 Aggregate 15 Foundation part 16 Earth and sand 26 Concrete foundation 27 Gravel 29 Sand 31 Bottom surface of water tank 32 Gravel layer 33 Internal gap 36 Ground surface 37 Concrete panel 41 One tube body 42 The other end portion 43 The other tube body 45 One tube body opening 46 The other tube body opening
55 Thermal insulation layer 58 Surrounding ground 59 Pavement 64 Storage

Claims (9)

Concrete tank that is embedded in the ground so that its upper surface part is at a depth of 0.5-2m from the ground surface and its lower surface part is at a depth of 5m from the ground surface, and can store heat transfer fluid And a heat absorbing / dissipating pipe embedded in a region to be radiated and a region to be absorbed, and the heat transfer fluid flowing inside, and sending the heat transfer fluid in the water tank to the heat absorbing / dissipating pipe and in the heat absorbing / dissipating pipe And a pump for returning the heat transfer fluid into the water tank,
Except for the upper surface portion of the water tank, a high heat conductive layer made of gravel and / or sand having a thermal conductivity of 5 W / (m · k) or more is provided so as to cover at least the side surface of the water tank. The layer covers at least the width side of 50 to 80% forming the lower side of the vertical width of the side surface.   2. The underground according to claim 1, wherein the high thermal conductive layer covering the side surface of the aquarium is provided in a lower portion of the side surface of the aquarium except a range portion having a depth of 1 m from the ground surface. Circulation type heat absorption / dissipation device using heat.   When the upper surface portion of the water tank is at a depth of 1 to 2 m from the ground surface, the high heat conductive layer covering the side surface of the water tank is provided with a thin upper portion on the side surface of the water tank and a thick lower portion in side view. The circulation type heat absorbing / dissipating device using geothermal heat according to claim 1, wherein   The foundation part for installing the lower surface part of the water tank is filled with gravel and / or sand with a high heat conductive layer in the accommodation part of the concrete foundation provided with the accommodation part with the upper and lower ends open. The circulating heat absorbing and radiating device using ground heat according to claim 1, 2, or 3.   4. The circulating heat absorption / dissipation device using geothermal heat according to claim 1, wherein a heat insulating material layer made of a synthetic resin foam is provided on an upper surface of the water tank.   4. The circulating heat absorption / dissipation using ground heat according to claim 1, wherein sand constituting the high thermal conductivity layer is filled in an internal gap of a gravel layer constituting the high thermal conductivity layer. apparatus.   The concrete water tank is configured by using a mixture of gravel and sand having a thermal conductivity of 5 W / (m · k) or more as a main aggregate. The circulation type heat absorbing / dissipating device described in 1.   The circulation type heat absorbing / dissipating device according to claim 1, wherein the gravel is silica stone and the sand is silica sand.   The circulation type heat absorbing / dissipating device according to claim 1, wherein a fireproof water tank is used as the water tank.

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