JP4530174B2 - Thermal storage system for concrete structures - Google Patents

Description

The present invention comprises a heat storage body that accumulates natural energy such as solar heat and geothermal heat in a concrete structure such as a viaduct, and the energy from this heat storage body is used to melt snow on the road surface or to generate electric power in emergency and severe winter. The present invention relates to a heat storage system for a concrete structure that can be supplied to a heat source such as heating in the period.

As a first example of this type of conventional technology, there is a wind-based snow melting system disclosed in Japanese Patent Application Laid-Open No. 2003-35250 as shown in FIG. If it demonstrates about this, in this system, the wind power generator A is comprised by the Darrieus type | mold windmill 1 and the synchronous generator (alternator) 2. FIG. When the windmill 1 is rotated by the wind W, the rotating shaft of the synchronous generator 2 is rotated, and AC power is generated in the synchronous generator 2 by this rotation. The AC power is supplied to the electric heater through the power supply path 3. The power supply path 3 is provided with a transformer (voltage regulator) 3a, which can adjust the supply voltage. The electric heater 4 generates electric power and generates heat. For example, the electric heater 4 is configured using a planar heating element containing carbon. Further, since the planar heating element is installed outdoors, it is covered with a covering material made of resin or the like and waterproofed. A latent heat storage material 5 is provided on the electric heater 4 so as to be in contact therewith. The latent heat storage material 5 has a latent heat temperature set at a temperature at which the snow S melts, and the temperature shown in FIG. That is, the latent heat storage material 5 having the property of storing heat by spending heat applied at a temperature of about 5 ° C. for state change is used. As the latent heat storage material 5, a material obtained by sealing an inorganic hydrate salt in a resin bag (container) is used. And it is the structure by which the cover member 6 for covering this on the latent-heat storage material 5 is provided.

A second example of this type of conventional technology is a paved road storing a heat storage material, and there is a technology disclosed in Japanese Patent Laid-Open No. 7-243202 as shown in FIG. If it demonstrates about this, FIG. 4 has shown sectional drawing of the paved road which stored the thermal storage material B. FIG. In FIG. 4, a surface layer 7, a base layer 8, a roadbed 9, and a roadbed 10 are shown, and a storage container 11 storing the heat storage material B is embedded in the base layer 8. FIG. 4 shows the case of an asphalt paved road, but in the case of a concrete paved road, the surface layer 7 and the base layer 8 form the same layer. For example, the thickness of the surface layer 7 is 5 cm, and the thickness of the base layer 8 is also 5 cm. Of course, the thickness of each of the layers 7 and 8 is not limited, but the surface layer 7 to be scraped off when repairing a damaged or aged road surface is required to have a sufficient thickness. 11 are embedded in a base layer 8 provided at a depth that does not become an obstacle during repair. Therefore, in the case of a concrete paved road, it is provided at a depth of several cm to 7 cm to 8 cm from the upper surface of the surface layer 7. And as an effect | action of the said structure, when the thermal storage material B stored in the storage container 11 exists in a liquid state, if this thermal storage material B is cooled, it will become below a freezing point, and after that, the thermal storage material B is solid from a liquid. Change to phase. Depending on the heat storage material B, it may be supercooled, but when the phase changes from liquid to solid, solidification is continued while maintaining the freezing point temperature. Therefore, at this time, the heat storage material B releases latent heat and gives thermal energy to the road surface C, and as a result, the road surface C is prevented from freezing. In this second example, a heat storage material B that changes phase at a temperature slightly higher than the temperature at which the road surface C freezes is used. In some cases, even if the heat storage material B that changes phase at 1 to 8 ° C. is used, a certain effect can be obtained. Until all the heat storage material B changes to a solid phase, the heat energy is released and heat is applied to the road surface. The heat storage material B once changed into a solid state is given heat energy from the road surface. Return to liquid again. This is because the daytime temperature rises and the road surface temperature rises, and heat is transferred from the road surface C to the heat storage material B, so that the phase changes from solid to liquid. The heat storage material B, which has become latent heat as a liquid, changes the phase from liquid to solid again when the temperature drops at dawn, and heats the road surface C. In the second example, the road surface is prevented from freezing using the phase change of the heat storage material B.
Japanese Patent Laid-Open No. 2003-35250 Japanese Patent Laid-Open No. 7-243202

The conventional technique has the following problems because of the configuration and operation described above. That is, according to the wind-powered snow melting system as a first example in the prior art, the collected energy is directly used for snow melting, and the energy of the wind W rotates the windmill 1, The rotational force is converted into an electric signal by the synchronous generator 2, and this electric signal is directly introduced into the electric heater 4 to cause the electric heater 4 below the road surface to generate heat, and the snow S on the road surface through the latent heat storage material 5. It is necessary to provide the above-mentioned electric heater 4 and latent heat storage material 5 for each part of the road surface, and the snow melting device and the snow melting system become complicated, large-scale and expensive, and the snow melting effect is directly There was a problem that it was greatly affected by the large and small amounts of energy produced, and the snow melting efficiency was poor and not suitable for practical use.
Further, according to the paved road storing the heat storage material as the second example in the prior art, the heat storage material B has the property of changing phase from liquid to solid before and after several degrees Celsius. Freezing prevention technology that uses solidification heat generated at the time, which is not a technology that collects and derives thermal energy from the heat storage material B and uses it, but is not suitable for snow melting technology on the road surface positively There was a problem.

The heat storage system for a concrete structure according to the present invention is provided inside a concrete structure as natural energy such as wind energy, solar heat, geothermal heat, heat of decomposition of organic matter by microorganisms, kinetic energy such as vibration force, etc. as heat or electric energy. This is a heat storage system that actively accumulates in a heat storage body or condenser, etc., and the heat or electrical energy stored in the heat storage body of a concrete structure is used for, for example, a snow melting system to prevent snow accumulation and freezing on the road surface. By using a heat storage body etc. in the concrete structure, the space of the entire system can be saved, and it can be applied to urban areas and places where installation space cannot be secured, and construction costs can be reduced. Therefore, the stored heat or electrical energy is supplemented for systems that have high initial costs such as the use of underground heat. To the system to scale reduction by utilizing the initial cost to a reduced a little technique, holds the following configuration or means.
That is, according to the first aspect of the present invention, there is provided a heat storage member that is embedded or fixed in a predetermined portion of a concrete structure and collects and stores heat energy from the ground, and the heat storage member forms a closed loop. 1. Absorbs and stores heat energy from the second pipe and has a second pipe adjacent to and arranged in the first pipe, and pumps the heat conduction medium filled and sealed in the first and second pipes to the load.・ Characterized by flow.

According to invention of Claim 2, it is the 1st and 2nd thermal storage member which is embed | buried or fixed to the predetermined site | part of a concrete structure, and extract | collects and stores the underground thermal energy or solar thermal energy from the ground or sunlight. On the other hand, the first heat storage member has a first pipe constituting a closed loop and a second pipe that absorbs and stores thermal energy from the first pipe and is adjacent to and arranged in the first pipe. The heat conduction medium filled / encapsulated in the second pipe is pumped to the load, and on the other hand, the second heat storage member constitutes a closed loop for conducting and storing solar heat energy from the solar heat absorbing plate installed in the concrete structure. 1. It has a second heat pipe that absorbs solar thermal energy from the second heat pipe and is adjacent to / disposed to the first heat pipe, and is filled in the first and second heat pipes. The input and heat transfer medium, characterized in that Nagareoku to the load.

According to invention of Claim 3, it is a heat storage member which is embed | buried or fixed to the predetermined site | part of a concrete structure, and extract | collects and accumulate | stores the underground heat from the ground, Comprising: This heat storage member comprised the closed loop. The second pipe has a second pipe that is adjacent to and arranged in the first pipe and absorbs and stores heat energy from the second pipe, and the heat conduction medium filled and sealed in the first and second pipes is pumped to the load. A heat exchanging pile for burying the heat and converting the underground heat into warm water is buried in the ground, and the warm water is flowed to the load.

According to a fourth aspect of the present invention, in the second aspect of the present invention, the second heat storage member is constituted by capacitor means for converting solar thermal energy into electric energy and storing the energy.

Since the heat storage system for a concrete structure according to the present invention has the above-described configuration and action, the following effects can be obtained.
That is, according to the present invention described in claims 1 to 4, by installing a heat storage body or the like in a concrete structure, energy can be used secondarily other than the snow melting system. It is possible to supply electric power in emergency and heat sources such as heating in the severe winter season, and in the case of heat energy, the heat storage body is latent heat or sensible heat. Concrete structures such as underground beams, leveled concrete or pillars, water storage tanks, septic tanks, etc. are suitable. In addition to the snow melting system, energy is stored and stored in a complex structure with an energy storage function. In addition, energy can be used for multipurpose applications such as lighting and heating, etc. as a power source and heat source. System space saving and construction costs can be reduced, and combined with a conventional snow melting system such as the use of excavated piles, which has a large initial cost, reduces the energy burden of the conventional snow melting system. The initial cost of the system is reduced.

Embodiments of a concrete structure heat storage system according to the present invention will be described below in detail with reference to the accompanying drawings.
FIG. 1 is a vertical sectional view showing an example of an embodiment in a heat storage system for a concrete structure according to the present invention.
FIG. 2 is a system configuration diagram showing a heat or electric energy conduction path of the concrete structure heat storage system according to the present invention shown in FIG. 1.

Reference numeral 12 denotes a concrete structure such as a viaduct, a road bridge or a concrete slab. For example, when the concrete structure 12 is a viaduct, as shown in FIG. 1, a concrete slab 13, a plurality of piers or columns 14 fixed to the lower surface of the concrete slab 13, and the piers or columns 14 , And a pile 15 is fixed to the lower surface thereof, and the beam 16 is embedded in the ground R. The beam 16 may be constituted by footing.

A first heat storage member 17 is embedded in or fixed to the beam 16 at a predetermined site. The entire first heat storage member 17 is formed of, for example, a box-shaped case or a rectangular plate member, and the material thereof is made of a metal material that conducts electrical energy or heat energy. A first pipe 17A in which a reciprocating path (closed loop) is formed in or on the surface of the first heat storage member 17, and heat energy emitted from the first pipe 17A is absorbed and stored, and a reciprocating path (closed loop) is formed. It has the formed 2nd piping 17B. A fourth pipe 17D is connected to the output side of the second pipe 17B, and a heat conduction medium is pumped by the pump means 23 to the load 24 through the fourth pipe 17D as necessary. Further, the second pipe 17B is disposed adjacent to the first pipe 17A.

The first and second pipes 17A and 17B are constituted by pipes and have a function of collecting thermal energy from the ground R, and are constituted by metal steel pipes, polyethylene, vinyl chloride, etc. Alternatively, a heat conduction medium (not shown) such as gas or circulating water is filled and enclosed. As the heat conduction medium, one having a large heat capacity such as water in the case of sensible heat, paraffin, sodium sulfate or other aqueous solution is adopted in the case of latent heat. The heat conduction medium moves in the first and second pipes 17A and 17B, so that heat energy is transferred.
The circulating action of the circulating water as the heat conduction medium in the first and second pipes 17A and 17B is performed using, for example, a pump or a blower.

The first pipe 17A connects the third pipe 17C routed to the surface or inside of the pile 15 to form a closed loop, and a pump means 18 is interposed in a part of the first pipe 17A. The heat conduction medium in the third pipe 17C that has absorbed the heat energy from 15 is pumped into the first pipe 17A.
The first piping 17A and the third piping 17C may be integrally formed as shown in FIG. 1, and the first piping 17A is extended to the portion of the pile 15, and the first piping 17A is used as the third piping 17C. Can also be substituted.
The piping route to the second piping 17B, the fourth piping 17D and the load 24 means a heat utilization route in a normal time.

Reference numeral 19 denotes a solar heat absorbing plate, which is fixed to the side surface 13a of the concrete floor slab 13 of the concrete structure 12, for example. An input side heat pipe 20 has one end connected to the solar heat absorbing plate 19 and the other end connected to the second heat storage member 21. Here, the second heat storage member 21 has the same shape and configuration as the first heat storage member 17, and is embedded or fixed in a predetermined portion of the pier or column 14 of the concrete structure 12. Inside or on the surface of the second heat storage member 21, there is a first heat pipe 21A, a second heat pipe 21B that absorbs and stores heat energy that is diffused from the first heat pipe 21A. The solar heat absorbing plate 19 may be fixed to a part other than the concrete slab 13.

The first heat pipe 21 </ b> A and the second heat pipe 21 </ b> B serve to store the heat by conducting the solar heat energy from the solar heat absorbing plate 19 that has absorbed the solar heat energy from sunlight L through the input side heat pipe 20. The second heat pipe 21 </ b> B flows or conducts the stored solar thermal energy to the output side heat pipe 22. The output side heat pipe 22 sends the heat conduction medium in the output side heat pipe 22 to the load 24 as necessary.
Here, the first and second heat pipes 21A and 21B are, for example, a hollow tube made of a special fiber called wick in a metal tube, and filled with a heat conduction medium that is liquefied or vaporized at a temperature near room temperature. When the first and second heat pipes 21A and 21B are installed at an incline and the lower part is heated, the heat conductor evaporates to the upper part of the first and second heat pipes 21A and 21B. Moving. And if the upper part of said 1st and 2nd heat pipe 21A, 21B is cooled, the gaseous heat conductive medium will condense and liquefy, and has a function which flows in the said wick and moves to the lower part.
It should be noted that the heat conduction medium can be conducted to a load 24 other than the paved road with the snow melting mechanism, such as a roof or a floor, in an emergency or when necessary. The first heat storage member 17 has a first pipe 17A in which a reciprocating path (closed loop) is formed in or on the surface, and absorbs and stores heat energy emitted from the first pipe 17A and also stores the reciprocating path ( A second pipe 17B having a closed loop). A fourth pipe 17D is connected to the output side of the second pipe 17B, and a heat conduction medium is supplied to the load 24 through the fourth pipe 17D as necessary. It is good also as a structure pumped by the pump means 23. FIG.

For example, the load 24 shown in FIG. 1 is a paved road with a snow melting mechanism installed on the upper surface R <b> 1 of the ground R, and is pumped or sent from the fourth pipe 17 </ b> D and / or the output side heat pipe 22. The snow S1 accumulated on the surface of the paved road with a snow melting mechanism is melted by the heat conduction medium.

The first and second heat storage members 17 and 21 described above are buried in piles 15, water storage tanks, septic tanks or foundation concrete (not shown) instead of being embedded in the beams (footings) 16 and the piers or pillars 14. Even so, the object of the present invention can be achieved.

Next, operation | movement etc. are demonstrated about embodiment in the thermal storage system of the concrete structure which concerns on this invention.

The third pipe 17C provided with ground heat from the ground R on the surface of the pile 15 or the like, or the first pipe 17A of the first heat storage member 17 is collected by a temperature difference. This underground heat may be heat of decomposition due to microorganisms or organic substances in the ground R, or may be residual heat such as domestic wastewater. A heat conduction medium made of liquid or gas such as water, paraffin, sodium sulfate, or an aqueous solution filled and sealed in the third piping 17C and the first piping 17A of the first heat storage member 17 is The decomposition heat is received from the third and first pipes 17C and 17A, and is pumped in the direction of the arrow A1 shown in FIG. 2 by the pump 18 existing in the path of the third pipe 17C. The heat conduction medium in the third and first pipes 17C and 17A circulates in the pipe and conducts thermal energy from the first pipe 17A to the adjacent second pipe 17B. Thermal energy is transferred between the two pipes 17B. Thus, the first heat storage member 17 having the first pipe 17A and the second pipe 17B stores thermal energy.

When the load 24 is a paved road with a snow melting mechanism as shown in FIG. 2, when the snow S1 is snowed on this surface, the heat conduction medium in the fourth pipe 17D is from the direction of the arrow A2 shown in FIG. It is pumped to the load 24 by the pump means 23 to perform a snow melting operation.
Moreover, when the load 24 is arranged as a heating device on the roof or floor of a house, the heat storage system of the present invention functions as a heating system for the house.

On the other hand, when the solar heat absorbing plate 19 fixed to a predetermined part of the concrete structure 12 is irradiated with sunlight L, the solar heat absorbing plate 19 absorbs solar heat energy. Then, the absorbed solar thermal energy is converted into a heat conduction medium, and the heat conduction medium in the input side heat pipe 20 and the first heat pipe 21A is flowed as shown by the arrow B1 direction in FIG. The heat energy is absorbed by the second heat pipe 21B by the action of the heat conduction medium circulating in the first heat pipe 21A. Thus, the second heat storage member 21 including the first and second heat pipes 21A, 21B stores solar thermal energy.

When the load 24 is a paved road with a snow melting mechanism as shown in FIG. 2, when the snow S1 is snowed on this surface, the heat conduction medium in the output side heat pipe 22 is in the direction of the arrow B2 shown in FIG. To the load 24 to perform a snow melting operation.
Moreover, when the load 24 is arranged as a heating device on the roof or floor of a house, the heat storage system of the present invention functions as a heating system for the house.

The solar heat energy from the solar heat absorbing plate 19 described above is used in the present heat storage system when the snow S1 accumulated on the surface of the paved road with a snow melting mechanism as a load 24 is melted in an emergency or when necessary. Used for heating.

Next, Example 1 in the heat storage system for a concrete structure according to the present invention will be described.

The Example 1 is established by a configuration newly added to the components in the example of the embodiment in the above-described heat storage system for a concrete structure according to the present invention or a configuration obtained by changing a part thereof. In other words, in FIG. 1 and FIG. 2, the heat exchange pile 25 is embedded in the ground R in particular. The heat exchange pile 25 has, for example, a predetermined length, is formed of a metal such as iron or a hard resin, and includes a double cylinder of an outer cylinder and an inner cylinder. The heat exchanging piles 25 may be separated from each other by a single tube and provided with a heat exchanging function. The inner cylinder is heated by a load 24 such as a concrete floor slab or a paved road. The hot water is caused to flow through the first pipe and flowed to a predetermined depth of the ground R, and hot air is absorbed at the cooling temperature in the ground R to make cold water. And this outer cylinder pushes up this cold water, and flows in the inside of 2nd piping, and cools loads 24, such as a concrete floor slab and a paved road. Thus, the heat island phenomenon of the load 24 such as a paved road in the summer is prevented. In addition, the configuration of Example 1 may be a configuration in which either the first heat storage member 17 or the second heat storage member 21 is omitted from the components in the above-described embodiment.
The other constituent members in the first embodiment are substantially the same as the constituent members in the above-described embodiment, and are assigned the same reference numerals and symbols, and descriptions of their functions and operations are omitted.

Next, a second embodiment of the heat storage system for a concrete structure according to the present invention will be described.

In Example 2, the second heat storage member 21 shown in FIG. 1 and FIG. 2 is used as a heat storage function in the constituent elements in the embodiment of the heat storage system for a concrete structure according to the present invention described above. The first and second heat pipes 21A and 21B, the input side heat pipe 20 and the output side heat pipe 22 provided in the second heat storage member 21 are replaced with electric wires. With such a configuration, the solar thermal energy is converted into electric energy, the electric energy is stored by a capacitor (not shown), and is supplied to a load 24 such as a paved road with a snow melting mechanism in an emergency or when necessary, and snow S1 To melt. Thus, Example 2 can be used as an auxiliary heat source in this heat storage system.
The other constituent members in Example 2 are substantially the same as the constituent members in the above-described embodiment, and are given the same reference numerals and symbols, and descriptions of their functions and operations are omitted.
In the second embodiment, instead of the solar heat absorbing plate 19, another device for generating kinetic energy by wind energy or vibration can be provided, which can be converted into electric energy and used.

It is a vertical sectional view showing an example of an embodiment in a heat storage system for a concrete structure according to the present invention. It is a system block diagram which shows the conduction path | route of the heat | fever or electric energy of the thermal storage system of the concrete structure based on this invention shown in FIG. It is a figure which shows a wind-powered snow melting system as a 1st example in a prior art. It is a vertical sectional view which shows the paved road which stored the thermal storage material as a 2nd example in a prior art.

Explanation of symbols

12 Concrete structure 13 Concrete floor slab of concrete structure 13a Side of concrete floor slab of concrete structure 14 Bridge pier (column)
15 Pile 16 Beam 17 First heat storage member 17A First heat storage member first pipe 17B First heat storage member second pipe 17C First heat storage member third pipe 17D First heat storage member fourth pipe 18 Pump means 19 Solar heat Absorption plate 20 Input side heat pipe 21 Second heat storage member 21A First heat pipe 21B of second heat storage member Second heat pipe 22 of second heat storage member Output side heat pipe 23 Pump means 24 Load 25 Heat exchange pile S1 Snow L Sun Light R Ground R1 Top surface of ground

Claims (4)

A heat storage member that is buried or fixed in a predetermined part of a concrete structure and collects and stores heat energy from the ground, and the heat storage member absorbs heat energy from the first and second pipes constituting a closed loop and A concrete structure characterized by storing and having a second pipe adjacent to and arranged in the first pipe, and pumping / flowing a heat conduction medium filled and sealed in the first and second pipes to a load Heat storage system. First and second heat storage members that are buried or fixed in a predetermined part of a concrete structure and collect and store ground heat energy or solar heat energy from the ground or sunlight, on the one hand, the first heat storage member The first pipe constituting the closed loop and the second pipe that absorbs and stores heat energy from the first pipe and is adjacent to and arranged in the first pipe, and the heat filled and sealed in the first and second pipes The conductive medium is pumped to the load, and on the other hand, the second heat storage member transmits solar thermal energy from the first and second heat pipes that form a closed loop that conducts and stores solar thermal energy from the solar heat absorbing plate installed in the concrete structure. A second heat pipe that absorbs the first heat pipe and is disposed adjacent to the first heat pipe, and the heat conductive medium filled and enclosed in the first and second heat pipes is the load Heat storage system of the concrete structure, characterized by Nagareoku. A heat storage member that is buried or fixed in a specific part of a concrete structure and collects and stores underground heat from the ground, and the heat storage member absorbs heat energy from the first and second pipes constituting a closed loop. And storing and storing a second pipe adjacent to and disposed in the first pipe, the heat conduction medium filled and sealed in the first and second pipes being pumped / flowed to a load, and the ground to the ground A heat storage system for a concrete structure, wherein a heat exchange pile for converting heat into hot water is buried, and the hot water is flowed to the load. The heat storage system for a concrete structure according to claim 2, wherein the second heat storage member is constituted by capacitor means for converting solar heat energy into electric energy and storing the energy.

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