JP3166096B2 - Freezing control type low temperature storage facility and its construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for transferring cold heat in winter to the ground where a low-temperature storage room is constructed to form a frozen soil portion on the ground, and utilizing the latent heat of the frozen soil portion to cool the low-temperature storage room. The present invention relates to a low-temperature storage facility for maintaining a low temperature, and more particularly to a low-temperature storage facility for controlling the freezing point by adding a salt to water to control the freezing temperature of the low-temperature storage room.

[0002]

2. Description of the Related Art As a conventional low-temperature storage facility, a heat pipe is buried in the ground around the low-temperature storage room, and cold heat in winter is moved around the low-temperature storage room via the heat pipe to form the low-temperature storage room. It is known that the surrounding ground is frozen to form a frozen soil portion, and the latent heat of the frozen soil portion is used to maintain the low-temperature storage room at a low temperature.

In such a low-temperature storage facility, the freezing point of water in the ground is 0 ° C., and some of the crops and the like stored in the low-temperature storage room need to be stored at a lower temperature. For this reason,
It is conceivable to add a salt to the water in the ground to lower the freezing point of the water below 0 ° C. The freezing point of the water can be controlled by adjusting the salt concentration.

[0004]

However, in a conventional low-temperature storage facility in which salt is added to the water in the ground, when the water freezes, the salt is precipitated while forming the salt and becomes ice. In addition to this, depending on the freezing conditions, there is a possibility that a problem arises in that a positional distribution occurs in the salt concentration of ice and a positional distribution of freezing points occurs.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a freezing point control type low-temperature storage facility capable of suppressing a non-uniform distribution of salt concentration and thereby obtaining a uniform distribution of freezing points. The purpose is to provide.

[0006]

According to a first aspect of the present invention, there is provided a low-temperature storage facility having a controlled freezing point, wherein a water-absorbing polymer is mixed with water having a predetermined salt concentration on the outside of the side wall or the bottom surface of the low-temperature storage room. It is characterized by being filled with a gel material having a controlled freezing point.

According to a second aspect of the present invention, there is provided the low-temperature storage facility of the first embodiment, wherein soil such as gravel is mixed in the gel substance filled on the outer surface of the bottom wall. It is characterized by having.

According to a third aspect of the present invention, there is provided the low-temperature storage facility of the first or second aspect, wherein the low-temperature storage room is constructed above the ground.
A space filled with the gel material is formed between the low-temperature storage room and the ground, and a waterproof sheet is provided at a boundary between the space and the ground.

According to a fourth aspect of the present invention, there is provided a low-temperature storage facility with a freezing point control according to any one of the first to third aspects, wherein the water-stop sheet is provided on the side of the low-temperature storage room. A heat insulating material is provided.

According to a fifth aspect of the present invention, there is provided a low-temperature storage facility of the freezing point control type according to any one of the first to fourth aspects, wherein a heat-radiating end protrudes upward into the gel substance. Characterized in that the heat pipe is buried.

According to a sixth aspect of the present invention, there is provided a low-temperature storage facility having a freezing point control according to any one of the first to fifth aspects, wherein the gel filled in the outside of the side wall of the low-temperature storage chamber is provided. A heat insulating material is provided on an upper surface of the substance.

According to a seventh aspect of the present invention, there is provided a low-temperature storage facility of the freezing point control type according to the sixth aspect, wherein a water-stop sheet is provided on an upper surface of the heat insulating material. I do.

According to an eighth aspect of the present invention, there is provided a low-temperature storage facility of the freezing point control type according to any one of the first to eighth aspects, wherein the low-temperature storage room excavates the ground to a predetermined depth. An embankment is formed above the excavated trench and surrounds the low-temperature storage room at a predetermined distance from the low-temperature storage room.

According to a ninth aspect of the present invention, there is provided a method for constructing a low-temperature storage facility of the freezing point control type, wherein an excavation groove is excavated at a predetermined depth in the ground, and a water-stop sheet and a heat insulating material are sequentially provided on the bottom surface of the excavation groove. Laying, a water-absorbing polymer is mixed with water of a predetermined salt concentration, and a gel material whose freezing point is controlled is filled thereon, and a heat pipe is buried in the gel material by projecting a heat radiation end to the sky, A low-temperature storage room is constructed on the gel substance, and an embankment is constructed by surrounding the outside of the low-temperature storage room at a predetermined distance from the low-temperature storage room. A predetermined salt concentration is defined between the embankment and the low-temperature storage room. The water-absorbent polymer is mixed in the water, and the gel substance whose freezing point is controlled is filled, and the heat insulating material and the water-stop sheet are laid in this order on the upper surface of the gel substance.

[0015]

According to the low-temperature storage facility of the first aspect of the present invention, the water-absorbing polymer is mixed with water having a predetermined salt concentration on the outside of the side wall or the outer surface of the bottom wall of the low-temperature storage room to control the freezing point. Since the gel substance is filled with water, partial precipitation of salt when water is frozen is suppressed, and the salt concentration in the gel substance can be kept almost uniform. As a result, the freezing point of the gel substance can be reduced. It can be uniformly maintained at a constant value of 0 ° C. or less.

According to the low-temperature storage equipment of the second aspect of the present invention, since the gel substance filled on the outer surface of the bottom wall is mixed with soil such as gravel, the gel substance has sufficient strength. The low-temperature storage room can be reliably and stably constructed on the upper part.

According to the third aspect of the present invention, a space filled with the gel substance is formed between the low-temperature storage room and the ground, and a boundary between the space and the ground. Is provided with a water-stop sheet, so that water can be prevented from flowing out of the ground from the gel substance filled in the space.

According to the low-temperature storage equipment of the fourth aspect of the present invention, since the heat insulating sheet is provided with a heat insulating material on the side of the low-temperature storage chamber, heat is supplied from the filled gel substance. Emission to the ground is reduced,
The gel substance can be effectively frozen and the low-temperature storage room can be kept at a low temperature for a long time.

According to the low-temperature storage equipment of the fifth aspect of the present invention, since the heat pipe whose heat-radiating end protrudes above the air is buried in the gel substance, the cold substance can be efficiently cooled. And the gel substance can be frozen.

According to the low temperature storage equipment of the sixth aspect of the present invention, since the heat insulating material is installed on the upper surface of the gel material filled outside the side wall of the low temperature storage room, the filled gel material is provided. Therefore, the release of cold heat toward the atmosphere can be reduced, so that the gel substance can be effectively frozen and the low-temperature storage chamber can be kept at a low temperature for a long time.

According to the seventh aspect of the present invention, since the waterproof sheet is provided on the upper surface of the heat insulating material, rainwater can be prevented from penetrating into the gel substance. Dilution of the salinity of the gel material is prevented, thereby preventing controlled freezing fluctuations.

According to the eighth aspect of the present invention, the low-temperature storage room is constructed above an excavation trench excavating the ground to a predetermined depth, and the outside of the low-temperature storage room is defined by a predetermined amount. Since the embankment portion is formed so as to surround the space at a distance, the space for filling the gel substance can be constructed by a simple procedure, and the filled gel substance is stably held in the space. .

According to the method of constructing a low temperature storage type cold storage facility according to the ninth aspect of the present invention, an excavation groove is excavated at a predetermined depth in the ground, and a water-stop sheet and a heat insulating material are sequentially provided on the bottom surface of the excavation groove. Laying, a water-absorbing polymer is mixed with water of a predetermined salt concentration, and a gel material whose freezing point is controlled is filled thereon, and a heat pipe is buried in the gel material by projecting a heat radiation end to the sky, A low-temperature storage room is constructed on the gel substance, and an embankment is constructed by surrounding the outside of the low-temperature storage room at a predetermined distance from the low-temperature storage room. A predetermined salt concentration is defined between the embankment and the low-temperature storage room. The water-absorbent polymer was mixed into the water and filled with a gel substance whose freezing point was controlled, and on the top surface of this gel substance, a heat insulating material and a waterproof sheet were laid in this order, so that it was structurally stable in a very short time. It is possible to construct a freezing storage facility with a freezing point control structure. .

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a method for constructing a freezing-controlled low-temperature storage facility according to an embodiment of the present invention will be described with reference to FIGS.

First, as shown in FIG. 1, an excavation groove 2 having a predetermined depth is excavated in the ground 1.

Next, as shown in FIG. 2, a water-stop sheet 3 and a heat insulating material 4 are laid on the bottom surface of the excavation groove 2 in this order.

Next, as shown in FIG. 3, a gel material 5 having a freezing point controlled by mixing a water-absorbing polymer into water having a predetermined salt concentration is filled on the heat insulating material 4. Soil such as gravel is mixed into the gel substance 5 to have a desired strength. Further, the heat pipe 6 is buried in the gel substance 5 with the heat radiation end 6a protruding above the air.

When the ground 1 itself is used as a latent heat storage medium, its heat storage density is extremely low, about 1/5 of that of water. Therefore, in this embodiment, it is necessary to make the ground 1 contain water. However, in order to prevent the water from convection or leaking into the ground 1, a water-absorbing polymer is mixed into water having a predetermined salt concentration to provide convection prevention and water stopping functions.

Next, as shown in FIG. 4, a low-temperature storage room 7 is constructed on the gel material 5. A geotextile for retaining is attached to the front surface of the wall surface of the low-temperature storage room 7.

Next, as shown in FIG. 5, the embankment portion 9 is constructed by surrounding the low-temperature storage room 7 outside the low-temperature storage room 7 at a predetermined distance. After the embankment 9 is formed, the low-temperature storage room 7 may be constructed.

Next, as shown in FIG. 6, a gel material 10 having a freezing point controlled by mixing a water-absorbing polymer into water having a predetermined salt concentration between the embankment 9 and the low-temperature storage room 7 is filled. . At this time, a heat insulating material 11 having the same configuration as the heat insulating material 4 is laid on the inner peripheral surface of the embankment portion 9.

Finally, a heat insulating material 12 is provided on the upper surface of the gel substance 10.
And the water stop sheet 13 is installed in this order. This allows
The freezing point control type low temperature storage facility of the present embodiment is completed.

According to the above-described method for constructing a freezing point control type low temperature storage facility, it is possible to construct an extremely low temperature freezing point control type low temperature storage facility having a structurally stable structure.

In the low-temperature storage facility of the present embodiment,
Cold heat in winter is applied to the gel substances 5 and 10 through the heat pipe 6.
And the gel substances 5, 10 and the surrounding ground 1 are frozen. Then, after the cold heat stops moving, the inside of the low-temperature storage chamber 7 is kept at a predetermined low temperature by the latent heat of the gel substances 5 and 10.

As described above, the constructed freezing-point-control type low-temperature storage facility is a gel in which a water-absorbing polymer is mixed with water having a predetermined salt concentration on the outside of the side wall or the bottom surface of the low-temperature storage chamber 7 to control the freezing point. Since the substances 5 and 10 are filled, partial precipitation of salt when water is frozen is suppressed, and the salt concentration in the gel substances 5 and 10 can be kept substantially uniform. The freezing point of the substance can be kept uniformly below 0 ° C.

Further, according to the freezing point control type low temperature storage facility of the present embodiment, since the soil such as gravel is mixed in the gel material 5 filled on the outer surface of the bottom wall, the gel material 5 has sufficient strength. Even if the low-temperature storage room 7 is constructed on the upper part, the low-temperature storage room can be reliably and stably supported.

Further, according to the low-temperature storage facility of the present embodiment, the space filled with the gel substance (enclosed by the excavation trench 2 and the embankment 9) is provided between the low-temperature storage room 7 and the ground 1. (A space) is formed, and the waterproof sheet 3 is provided at the boundary between the space and the ground 1, so that it is possible to prevent water from flowing out from the gel substances 5, 10 filled in the space to the ground. .

Further, according to the freezing point control type low temperature storage equipment of this embodiment, since the heat insulating material 4 is provided on the low temperature storage room 7 side of the water stop sheet 3, the filled gel substances 5, 10 are filled.
, Heat is released to the ground 1, thereby effectively freezing the gel substances 5 and 10 and keeping the low-temperature storage chamber 7 at a low temperature for a long time.

Further, according to the freezing point control type low temperature storage equipment of the present embodiment, the heat pipe 6 having the heat radiation end 6a protruding above the air is buried in the gel substance 5, so that the heat can be efficiently transferred to the gel. The gel substance 5,
10 can be frozen.

Further, according to the freezing point control type low temperature storage equipment of the present embodiment, since the heat insulating material 12 is installed on the upper surface of the gel substance 10 filled on the outside of the side wall of the low temperature storage chamber 7, the filled gel is stored. The release of heat from the substances 5, 10 towards the atmosphere is significantly reduced, and thus effectively the gel substance 5,
10 can be frozen and the inside of the low-temperature storage room 7 can be kept at a low temperature for a long time.

Further, according to the freezing point control type low temperature storage equipment of the present embodiment, since the water stoppage sheet 13 is provided on the upper surface of the heat insulating material 12, rainwater can penetrate into the gel substances 5, 10. This can prevent the salt concentration of the gel substances 5 and 10 from being diluted, thereby preventing the controlled freezing point from fluctuating and performing stable low-temperature storage.

Further, according to the freezing point-controlled low-temperature storage facility of this embodiment, the low-temperature storage room 7 is constructed above the excavation groove 2 formed by excavating the ground 1 to a predetermined depth, and the outside of the low-temperature storage room 7 is provided. Since the embankment portion 9 is formed so as to be surrounded by a predetermined distance, the space for filling the gel substances 5 and 10 can be constructed by a simple procedure, and the filled gel substances 5 and 10 are stable. Is held in the space.

[0043]

As described above, according to the first aspect of the present invention,
According to the described low-temperature control type low-temperature storage facility, since the water-absorbing polymer is mixed with water having a predetermined salt concentration on the outside of the side wall or the outer surface of the bottom wall of the low-temperature storage room, the gel substance whose freezing point is controlled is filled. When the water is frozen, the partial precipitation of the salt is suppressed, and the salt concentration in the gel substance can be kept almost uniform. As a result, the freezing point of the gel substance can be uniformly reduced to 0 ° C.
It can be held below.

According to the low-temperature storage apparatus of the second aspect of the present invention, since the gel substance filled in the outer surface of the bottom wall is mixed with soil such as gravel, the gel substance has sufficient strength. The low-temperature storage room can be reliably and stably constructed on the upper part.

According to the third aspect of the present invention, a space filled with the gel substance is formed between the low-temperature storage room and the ground, and a boundary between the space and the ground. Is provided with a water-stop sheet, so that water can be prevented from flowing out of the ground from the gel substance filled in the space.

According to the low temperature storage equipment of the fourth aspect of the present invention, since the heat insulating sheet is provided with a heat insulating material on the side of the low temperature storage chamber, heat is supplied from the filled gel substance. Emission to the ground is reduced,
The gel substance can be effectively frozen, and the low-temperature storage room can be kept at a low temperature for a long time.

According to the low-temperature storage facility of the fifth aspect of the present invention, since the heat pipe whose radiating end protrudes upward in the gel substance is buried in the gel substance, the cold heat can be efficiently transferred to the gel substance. And the gel substance can be frozen.

According to the low temperature storage equipment of the sixth aspect of the present invention, since the heat insulating material is provided on the upper surface of the gel material filled outside the side wall of the low temperature storage room, the filled gel material is provided. , Heat is released to the atmosphere, thereby effectively freezing the gel substance and keeping the low-temperature storage room at a low temperature for a long time.

According to the seventh aspect of the present invention, since the waterproof sheet is provided on the upper surface of the heat insulating material, rainwater can be prevented from penetrating into the gel substance. Dilution of the salt concentration of the gel substance is prevented, thereby preventing the controlled freezing point from fluctuating.

According to the low-temperature storage facility of the eighth aspect of the present invention, the low-temperature storage room is constructed above a digging trench excavating the ground to a predetermined depth, and the outside of the low-temperature storage room is defined by a predetermined amount. Since the embankment portion is formed so as to surround the space at a distance, the space for filling the gel substance can be constructed by a simple procedure, and the filled gel substance is stably held in the space. .

According to the method of constructing a low temperature storage type cold storage facility according to the ninth aspect of the present invention, an excavation groove having a predetermined depth is excavated in the ground, and a water-stop sheet and a heat insulating material are sequentially formed on the bottom surface of the excavation groove. Laying, a water-absorbing polymer is mixed with water of a predetermined salt concentration, and a gel material whose freezing point is controlled is filled thereon, and a heat pipe is buried in the gel material by projecting a heat radiation end to the sky, A low-temperature storage room is constructed on the gel substance, and an embankment is constructed by surrounding the outside of the low-temperature storage room at a predetermined distance from the low-temperature storage room. A predetermined salt concentration is defined between the embankment and the low-temperature storage room. The water-absorbent polymer is mixed into the water and the gel material whose freezing point is controlled is filled, and the heat insulating material and the waterproof sheet are laid in this order on the upper surface of this gel material, so that it is structurally stable in a very short time. Construction of a freezing-controlled low-temperature storage facility with Kill.

[Brief description of the drawings]

FIG. 1 is a diagram showing one step of a method of constructing a freezing-point-controlled low-temperature storage facility according to one embodiment of the present invention.

FIG. 2 is a view showing one step of a method of constructing a freezing-point-controlled low-temperature storage facility according to one embodiment of the present invention.

FIG. 3 is a diagram showing one step of a method for constructing a freezing-controlled low-temperature storage facility according to one embodiment of the present invention.

FIG. 4 is a diagram showing one step of a method of constructing a freezing-controlled low-temperature storage facility according to one embodiment of the present invention.

FIG. 5 is a diagram showing one step of a method for constructing a freezing-controlled low-temperature storage facility according to one embodiment of the present invention.

FIG. 6 is a view showing one step of a method for constructing a freezing-controlled low-temperature storage facility according to one embodiment of the present invention.

FIG. 7 is a diagram showing one step of a method for constructing a freezing-controlled low-temperature storage facility according to one embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ground 2 Excavation groove 3 Water stop sheet 4 Heat insulation material 5 Gel substance 6 Heat pipe 7 Low temperature storage room 9 Filling part 10 Gel substance 11 Heat insulation material 12 Heat insulation material 13 Water stop sheet

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F25D 3/00 E02D 3/115 E02D 29/045 F25D 9/00

Claims (9)

(57) [Claims] 1. A low-temperature controlled low-temperature type low-temperature storage system characterized in that a water-absorbing polymer is mixed with water having a predetermined salt concentration and a gel substance whose freezing point is controlled is filled on the outside of the side wall or the outer surface of the bottom wall of the low-temperature storage room. Storage equipment. 2. The low-temperature storage facility with controlled freezing point according to claim 1, wherein soil such as gravel is mixed in the gel substance filled in the outer surface of the bottom wall. 3. The low-temperature storage room is constructed above the ground, and a space filled with the gel substance is formed between the low-temperature storage room and the ground, and a stop is formed at a boundary between the space and the ground. The freezing-point-controlled low-temperature storage facility according to claim 1 or 2, wherein a water sheet is provided. 4. A heat insulating material is provided on the low-temperature storage room side of the water-stop sheet.
4. The freezing point controlled cold storage facility according to any one of the above. 5. The freezing point-controlled low-temperature storage facility according to claim 1, wherein a heat pipe whose heat-radiating end protrudes upward is buried in the gel material. 6. The freezing-point-controlled low-temperature storage facility according to claim 1, wherein a heat insulating material is provided on an upper surface of the gel material filled outside the side wall of the low-temperature storage room. . 7. The low-temperature storage facility according to claim 6, wherein a water-stop sheet is provided on an upper surface of the heat insulating material. 8. The low-temperature storage room is constructed above a digging trench excavating the ground to a predetermined depth, and an embankment portion is formed so as to surround the outside of the low-temperature storage room with a predetermined distance therebetween. The freezing point control type low temperature storage facility according to any one of claims 1 to 8, wherein 9. A digging groove of a predetermined depth is excavated in the ground, a water-stop sheet and a heat insulating material are laid in the bottom of the digging groove in this order, and a water-absorbing polymer is mixed with water having a predetermined salt concentration on this. The gel material is filled with a controlled freezing point, and a heat pipe is buried in the gel material with the radiating end protruding upward, and a low-temperature storage room is constructed on the gel material. A surrounding area is constructed in a state of being spaced outward by a predetermined distance to form an embankment, and a gel material having a freezing point controlled by mixing a water-absorbing polymer into water having a predetermined salt concentration between the embankment and the low-temperature storage room. A method for constructing a freezing-controlled low-temperature storage facility, characterized by filling and laying a heat insulating material and a waterproof sheet on the upper surface of the gel substance in this order.