JP2002081876A - Convenient heat storage tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a convenient heat storage tank which can be assembled and installed easily and inexpensively. SOLUTION: A large number of arcuate metallic wall elements 20, 21 are jointed in the vertical direction and circumferential direction to assemble a tubular tank body 2, thermal insulation layers 5a and 5b are provided on the bottom part and the inner circumferential surface of the tubular tank body 2, a water unpermeable bag body 3 having inner volume substantially equal to that of the tubular tank body 2 is contained in the tubular tank body 2, a cover 4 is applied to the opening at the upper end of the tubular tank body 2 through a thermal insulation layer 5c, and pipes 17a and 17b for supplying cold or hot water into the bag body 3 and pipes 16a and 16b for transmitting cold or hot water in the bag body 3 to the outside are laid to constitute a convenient heat storage tank.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simple heat storage tank which can be easily and inexpensively assembled and constructed.

[0002]

2. Description of the Related Art In recent years, an ice heat storage system that makes use of inexpensive nighttime electric power and discharges its latent heat during daytime cooling to prevent a temporary sharp increase in electric power used has been recommended.
The use of this system is advantageous for the business operator because the contract power can be reduced.

[0003]

However, the heat storage tank used in the above system is a small tank that can be loaded on a truck and transported, and many heat storage tanks must be installed to cool a large building or factory. This was inefficient because it had to be done, and was disadvantageous in terms of economy.

[0004] Such a problem can be solved by installing a large heat storage tank having a large capacity. However, it is difficult to construct such a large heat storage tank at the installation site without water leakage. In the case of building by connecting and joining panels made of steel, there is a problem that there is a risk of water leakage at the joint, and when building with concrete, there is a problem that the construction period is prolonged and a large construction cost is required .

SUMMARY OF THE INVENTION The present invention has been made to address the above problems, and an object of the present invention is to provide a simple heat storage tank which can be assembled and constructed at a low cost.

[0006]

In order to achieve the above object, a simple heat storage tank of the present invention comprises a cylindrical tank formed by joining a large number of metal wall elements curved in an arc shape in a vertical direction and a circumferential direction. Assembling the main body, providing a heat insulating layer on the bottom and inner peripheral surface of the cylindrical tank body, and placing an impermeable bag having an inner volume substantially equal to the inner volume of the cylindrical tank body inside the cylindrical tank body. It is housed, the lid is attached to the upper end opening of the cylindrical tank body via an insulating layer, and a water supply pipe for supplying cold water or hot water to the bag body and a water supply pipe for sending cold water or hot water inside the bag body to the outside are provided. It is characterized by the following.

[0007] In such a simple heat storage tank, since cold or hot water is stored in a bag housed in the cylindrical tank main body, a joint portion of a wall element constituting the cylindrical tank main body lacks watertightness. However, there is no need to worry about water leakage outside. Therefore, the simple heat storage tank does not need to be welded to the wall element in a watertight manner, and the wall element may be joined so as not to be separated and disassembled to assemble the cylindrical tank main body. It is possible to carry out construction in a short period of time and at low cost.

Further, a heat insulating layer is provided on the bottom and the inner peripheral surface of the cylindrical tank main body, and a lid is attached to the upper end opening of the cylindrical tank main body via the heat insulating layer. The simple heat storage tank has excellent heat insulating properties, and can store the heat of the cold water or the hot water supplied from the water supply pipe into the bag without almost releasing the heat to the outside of the tank. When the cold or hot water is supplied to, for example, a heat exchanger of an air conditioner through a water pipe, cooling and heating can be performed.

Further, when the tank body is cylindrical, as in this simple heat storage tank, water does not stagnate at the four corners as in a box-shaped tank, and the temperature of the cold or hot water in the tank is almost entirely reduced. It can be kept uniform.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view showing a simplified heat storage tank according to an embodiment of the present invention, FIG. 2 is a schematic sectional view of the heat storage tank, and FIG. 3A is a wall used for a cylindrical tank body of the heat storage tank. FIG. 3B is a perspective view of a lowermost wall element used in the cylindrical tank body, FIG. 4 is an enlarged perspective view of an end portion of the wall element, and FIG. 5 is a wall in the cylindrical tank body. FIG. 6 is an enlarged cross-sectional view of a vertical joining portion of a wall element in the cylindrical tank main body, and FIG. 6A is an enlarged cross-sectional view of a joining portion of the wall element in the cylindrical tank main body. (B) shows the state after bending to the inside. 7 is a partial perspective view showing a mounting structure of an open upper end portion of the bag body in the heat storage tank, FIG. 8 is a partial cross-sectional view showing a fixing structure of a cylindrical tank body in the heat storage tank, and FIG. It is sectional drawing of the water intake of the bag body bottom part in a tank.

1 and 2, reference numeral 2 denotes a cylindrical tank main body, and the cylindrical tank main body 2 is installed on the ground 1. Heat insulating layers 5a and 5b are provided on the bottom and the inner peripheral surface of the cylindrical tank body 2, and an impermeable bag 3 is accommodated inside the heat insulating layers 5a and 5b. The lid 4 is attached to the upper end opening of the cylindrical tank body 2 via a heat insulating layer 5c.

The cylindrical tank body 2 has a metal wall element 20 which is curved in an arc shape as shown in FIG. 3A and is joined in the circumferential direction, and the wall element 20 is halved in the circumferential direction. The cylindrical tank body 2 is assembled by being alternately displaced and vertically joined, and a wall element 21 shown in FIG. Both of these wall elements 20, 21
It is manufactured by bending a metal plate such as a galvanized steel plate, an aluminum-plated steel plate, and a stainless steel plate having a thickness of about 0.4 to 1 mm which can be easily bent at a construction site or a factory.

That is, the wall element 20 shown in FIG.
Is formed by bending the upper and lower ends of a metal plate curved into an arc shape obtained by dividing the circumference into three parts at right angles outwardly, thereby forming an upper end flange portion 20.
a and the lower end flange portion 20b, respectively,
The distal ends of the flange portions 20a and 20b are further bent at a right angle downward, and a short hanging edge 20c having a short vertical dimension is provided at the distal end of the upper flange portion 20a, and a hanging edge 20d having a vertical dimension longer than the vertical edge 20c is provided at the lower flange portion. Each of the connecting pieces 20e is formed at the right end of the wall element 20 at right and left ends of the wall element 20 at right and left sides, as shown in FIGS.
A plurality of bolt insertion holes 20f are drilled in the connecting piece 20e.

The specific dimensions of the wall element 20 are not particularly limited, and may be appropriately determined in consideration of the size of the cylindrical tank body 2 to be assembled and the weight of the wall element. In order to produce a large amount of heat storage tank, it is appropriate to set the diameter of the cylindrical tank body 2 to about 2.5 to 8.0 m, so that the radius of curvature of the wall element 20 is set to about 1.25 to 4.0 m. Set up and down dimensions 20 ~
It is desirable to set it to about 50 cm.

The wall element 21 shown in FIG. 3B, which is used for the lowermost stage of the cylindrical tank body 2, is formed by bending the upper end flange portion 21a and the wall element 21 in the same manner as the wall element 20 shown in FIG. A short hanging edge 21c with a short top and bottom dimension
And a wide lower end flange portion 21b and connecting pieces 21e and 20e at both left and right ends, but a drooping edge is not formed at the tip of the lower end flange portion 21b.
This is different from the wall element 20 of FIG.

As shown in FIG. 6 (a), the vertical joining of the wall element 20 is performed by replacing the lower end flange portion 20b of the upper wall element 20 with the upper end flange of the lower wall element 20. The lower part of the hanging edge 20d of the lower end flange portion 20b is folded upward so as to embrace the hanging edge 20c of the upper end flange portion 20a, and further inward as shown in FIG. 6 (b). It is performed by bending and crimping. And
This wall element 20 and the lowermost wall element 21 are also
They are joined in the vertical direction in the same manner as described above.

As shown in FIG. 5, the wall elements 20 are joined in the circumferential direction by connecting bolts to the bolt insertion holes of the connecting pieces 20e of the wall elements 20 adjacent to each other in the circumferential direction. 5a are inserted and fastened with a nut 5b. Then, joining of the lowermost wall element 21 in the circumferential direction is performed in the same manner.

As described above, the cylindrical tank body 2 is
While the wall elements 20 and 21 are not welded to each other in a watertight manner, the respective hanging edges 20c and 20d of the upper flange portion 20a and the lower flange portion 20b are bent, and the connecting pieces 20e and 20e are bolted with the nuts 5b. Since the wall elements 20 and 21 are assembled by joining the wall elements 20 and 21 in the vertical direction and the circumferential direction by a simple operation of simply connecting and fixing, the assembly can be performed in a shorter time and at a lower cost than in the case of welding. Moreover, the wall element 2
Reference numerals 0 and 21 denote an element which is curved into an arc shape divided into three parts. Therefore, as in the case of the three-link mechanism, the element is settled so as not to be deformed and retains the shape of the cylindrical tank body 2 unless the through hole is opened. It is strong enough to withstand water pressure from inside.

As shown in FIGS. 1, 2 and 8, the ground 1 surrounding the cylindrical tank body 2 has a length of 50 to 80 cm.
A plurality of base pipes 6 are buried vertically, and mortar 7 is injected into each base pipe 6 and anchor bolts 8 are planted. Then, the anchor bolt 8 is inserted into the bolt insertion hole of the lower end flange portion 21b of the lowermost wall element 21 and the nut 8
By tightening at a, the cylindrical tank body 2 is fixed to the ground 1 so as not to float.

When the lower end of the cylindrical tank body 2 is fixed to the ground 1 with the anchor bolts 8 and the nuts 8a as described above, the seismic resistance is improved, so that the cylindrical tank body 2 is hard to fall down even if an earthquake occurs, and a typhoon blows. Even so, there is almost no fear of falling due to wind pressure. In addition, since the anchor bolts 8 are obtained by injecting the mortar 7 into the foundation pipe 6 driven into the ground 1 and implanting the same, for example, a concrete foundation is formed and the cylindrical tank body 2 is fixed thereon. The construction is much easier than in such a case.

As shown in FIG. 2, this cylindrical tank body 2
A sand layer 9 for adjusting the height of the bottom by eliminating unevenness of the ground is provided on the bottom of the heat insulating layer 5.
a is laid, and a heat insulating layer 5b is also attached to the inner peripheral surface of the cylindrical tank body 2 with an adhesive or the like.

As the heat insulating layers 5a and 5b and the heat insulating layer 5c covering the upper end opening of the cylindrical tank body 2, resin foams such as polystyrene, polypropylene, and polyurethane are used. In particular, the expansion ratio is 10 to 50 times. Degree, thickness 3
A resin foam having closed cells of about 10 cm to about 10 cm is preferably used. Such a resin foam not only exerts an excellent heat insulating effect but also has a certain degree of cushioning property, so that even if the bag body 3 is pressed against the heat insulating layers 5a and 5b by water pressure, the bag body 3 is softly supported. It also serves to protect it from breaking.

The bag 3 housed inside the cylindrical tank body 2 is formed by heat-sealing the lower end of a cylindrical sheet having substantially the same diameter as the inner diameter of the cylindrical tank body 2 on the outer periphery of the circular bottom sheet. Impervious bag, which is manufactured by water-tightly fusing and integrating by means such as welding, high-frequency welding, and ultrasonic welding, and has an inner volume substantially equal to the inner volume of the cylindrical tank body 2. Have. Therefore, when cold water or hot water is stored inside the bag 3, the bag 3 abuts on the heat insulating layer 5b on the inner peripheral surface of the cylindrical tank body 2 without any gap, and the water pressure is increased via the heat insulating layer 5b. Since the bag 3 hangs over the main body 2, there is no fear that the bag 3 will burst due to water pressure.

The material of the circular bottom sheet and the tubular sheet of the bag body 3 includes EPDM and other various synthetic rubber sheets,
Tarpaulin or the like impregnated with a synthetic resin such as polypropylene, polyvinyl acetate, polyvinyl chloride, nylon or the like in a woven fabric is preferable, and those having a thickness of about 0.3 to 1.5 mm are particularly preferably used. . Of course, synthetic resin blown films and laminated films are also used as long as they have sufficient strength. These films and the above-mentioned tarpaulins may be used by overlapping two sheets, and when such two sheets are overlapped, even if one film is torn, water leakage can be prevented with another film. There are advantages.

As shown in FIGS. 2 and 7, the open upper end 3a of the bag body 3 has an upper end opening edge of the cylindrical tank body 2, that is, the uppermost wall element 2 of the cylindrical tank body 2.
0, it is folded outward and downward from the upper end flange portion 20a,
A large number of eyelets 3b are formed at regular intervals in the upper end 3a of the folded bag body 3. A number of eyebolts 12 are attached to the lower end flange portion 20b of the uppermost wall element 20 as wire holders, and ropes are attached to the eyebolts 12 and the eyelets 3b.
The upper end portion 3a of the bag body 3 is fixed by alternately tightening wires 13 having high tensile strength, such as a string and a wire. When fixed in this manner, the upper end 3a of the bag 3
Can fall into the inside of the cylindrical tank body 2 and leak water.

As the wire holder, other than the above-described eye bolt 12, a hook bolt or the like that can securely hold the wire can be used.

On the other hand, at the bottom of the bag 3, two water intakes 14a and 14b are provided as shown in FIG.
As shown in FIG. 9, the water inlet 14 a is inserted into the hole formed in the bottom of the bag body 3 from above with a male screw ring 141 with a flange and screwed into a female screw cylinder 142 with a flange on the back side. Flange and female screw cylinder 142
The water intake port 14b is provided by sandwiching the periphery of the hole of the bag body 3 from above and below in a watertight manner with the flange of FIG.
Are similarly provided.

The water intakes 14a and 14b are provided in FIG.
As shown in the figure, two water pipes 16a and 16b are connected in a watertight manner and are piped. One water supply pipe 16a is a pipe for sending cold water or hot water inside the bag body 3 to a heat radiation heat exchanger on the air conditioner side as described later, and the other water supply pipe 16b
Is a tube for sending cold water or hot water inside the bag body 3 to the endothermic heat exchanger as described later. These water pipes 16a,
16b is desirably covered with a heat insulating material 5 as shown in FIG.

As shown in FIGS. 1 and 2, the lid 4 attached to the upper end opening of the cylindrical tank body 2 is formed of a large number of metal frame pipes which extend obliquely downward from the top metal fitting 4a and extend radially. 4b and an opaque sheet 4 placed thereon
The light-transmitting sheet 4c is preferably made of a lightweight and tough canvas that does not allow light or rainwater to pass through. This lid 4 is
The pipe 4b is placed on the heat insulating layer 5c covering the upper end opening of the cylindrical tank body 2, and the ends of the pipes 4b are bolted by nuts (not shown) to the upper end flange of the uppermost wall element 20 of the cylindrical tank body 2. It is fixed to 20a and detachably attached.

Such a lid 4 has a simple structure and can be manufactured at a low cost, and can be easily attached to the upper end opening of the cylindrical tank body 2 and does not transmit light. Algae can be prevented from being generated in cold or hot water. The lid is not limited to the above-mentioned cap-shaped lid 4, and various shapes and structures such as a flat lid and a dome-shaped lid may be used as long as they do not transmit light and rainwater. It is possible.

Further, in this heat storage tank, as shown in FIGS. 1 and 2, two water supply pipes 17a and 17b penetrate through the opaque sheet 4c of the lid 4 and the heat insulating layer 5c, and have a cylindrical tank shape. It is inserted into the bag 3 in the main body 2. One water supply pipe 17a
Is a pipe for supplying cold water or hot water from an endothermic heat exchanger as described later, and the other water supply pipe 17b is a pipe for supplying water from a heat radiation heat exchanger on the air conditioner side described later. It is preferable that these water supply pipes 17a and 17b are covered with a heat insulating material (not shown) and further protected by further covering with a protective cylinder (not shown).

These water supply pipes 17a and 17b can be inserted from the side by penetrating the upper part of the cylindrical tank main body 2. However, when a hole is made in the cylindrical tank main body 2, the cylindrical tank main body 2 can be opened. Therefore, it is desirable to insert through the lid 4 as described above.

Next, an ice heat storage system using the simple heat storage tank will be described with reference to FIG.

This ice heat storage system is composed of a water supply pipe 1 that leads from an endothermic heat exchanger (supercooling heat exchanger) 31 to a heat storage tank T.
7a, an ice making machine 32 is provided, an ice nucleus removing filter 33 is provided in the middle of a water pipe 16b for supplying water from the heat storage tank T to the supercooling heat exchanger 31, and a heat storage tank T is provided in a heat exchanger 34 on the air conditioner side. The other water supply pipe 16a is connected to the water supply pipe 17b, and the water in the heat storage tank T is circulated to the supercooling heat exchanger 31 and the heat radiation exchanger 34 by pumps 35 and 36, respectively.

According to this ice heat storage system, the water in the heat storage tank T is sent to the subcooling heat exchanger 31 at night using inexpensive electric power at night in the summer, and minus 2 ° C. flowing through the heat exchanger 31. Heat exchange with brine of about minus 5 ° C to produce supercooled water of minus 2 ° C or less, and inject ice nuclei in the ice making machine 32 in the course of supplying this supercooled water to the heat storage tank T. To make ice water (cold water) of minus 2 ° C. or less, and supply this ice water to the heat storage tank T through the water supply pipe 17a. While the water in the heat storage tank T is being sent to the supercooling heat exchanger 31 again through the water pipe 17b, the ice nuclei are removed by the ice nucleus removing filter 33, and the water from which the ice nuclei have been removed is used by the supercooling heat exchanger 31. By repeating the process of forming supercooled water and further turning it into ice water by the ice making machine 32 and supplying it to the heat storage tank, cold heat is stored in the heat storage tank T.

When the heat is stored in this manner, the heat storage tank T exhibits an excellent heat insulating effect by the heat insulating materials 5a, 5b, 5c, so that the heat hardly escapes to the outside, and the loss is small. In addition, since the tank body 2 of the heat storage tank T is cylindrical, cold water does not stagnate at the four corners as in a box-shaped tank, and the temperature of the cold water in the tank T is almost uniformly around 0 ° C as a whole. Will be kept.

During the day when the power consumption increases, the cold water of about 0 ° C. stored in the heat storage tank T is pumped into the radiator heat exchanger 34 on the air conditioner side through the water pipe 16a. After the heat exchange with the cooling water of the air conditioner, the process of returning the heat to the heat storage tank T through the water supply pipe 17b is repeated, thereby performing the cooling with the power consumption minimized.

In this system, cold water (ice water) is stored in the heat storage tank T to store cold heat. Conversely, in the winter, hot water is stored in the heat storage tank T to store heat and perform heating. You may.

[0040]

As is apparent from the above description, the simple heat storage tank of the present invention is easy to assemble and can be constructed at a low cost. Since there is no partial stagnation of water in the tank, the water temperature can be kept substantially constant as a whole.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a simple heat storage tank according to an embodiment of the present invention.

FIG. 2 is a schematic sectional view of the heat storage tank.

FIG. 3A is a perspective view of a wall element used for a cylindrical tank main body of the heat storage tank, and FIG. 3B is a perspective view of a lowermost wall element used for the cylindrical tank main body.

FIG. 4 is an enlarged perspective view of an end of the wall element.

FIG. 5 is an enlarged sectional view of a circumferentially joined portion of a wall element in the cylindrical tank main body.

6A and 6B are enlarged cross-sectional views of a vertical joining portion of a wall element in the cylindrical tank main body, wherein FIG. 6A is a state before being bent inward, and FIG. This shows the state after the operation.

FIG. 7 is a partial perspective view showing a fastening structure of an open upper end of the bag body in the heat storage tank.

FIG. 8 is a partial sectional view showing a fixing structure of a cylindrical tank main body in the heat storage tank.

FIG. 9 is a cross-sectional view of a water intake at the bottom of the bag in the heat storage tank.

FIG. 10 is an explanatory diagram of an ice heat storage system using the heat storage tank.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ground 2 Cylindrical tank main body 20, 21 Wall element 3 Bag 3a Upper end part opened of bag 3b Eyelet hole 4 Lid 4a Top fitting 4b Frame pipe 4c Opaque sheet 5a, 5b, 5c Heat insulation layer 6 Foundation Pipe 7 Mortar 8 Anchor bolt 9 Sand layer 12 Eye bolt (Wire holder) 13 Wire 14a, 14b Intake 16a, 16b Water pipe 17a, 17b Water pipe 31 Supercooling heat exchanger (endothermic heat exchanger) 32 Ice machine 33 Ice core Removal filter 34 Heat radiation heat exchanger on air conditioner side T Simple heat storage tank

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) F28D 20/02 F28D 20/00 C

Claims (1)

[Claims] 1. A cylindrical tank body is assembled by joining a large number of metal wall elements curved in an arc shape in a vertical direction and a circumferential direction, and a heat insulating layer is provided on a bottom portion and an inner peripheral surface of the cylindrical tank body. An impervious bag having an inner volume substantially equal to the inner volume of the cylindrical tank body is housed inside the cylindrical tank body, and the lid is provided at the upper end opening of the cylindrical tank body via a heat insulating layer. A simple heat storage tank comprising a water supply pipe attached thereto and supplying cold or hot water into the bag body and a water supply pipe for sending cold or hot water inside the bag body to the outside.