JP2014044008A - Snow melting speed adjustment system and snow melting speed adjustment method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and precisely adjust a snow melting speed by supplying outside air directly to an air layer in contact with a snow mountain through a simple, low-cost structure.SOLUTION: A snow melting speed adjustment system includes: a protection sheet 3 which covers a snow mountain 2 such that an air layer E can be formed in a sealed state with the snow mountain 2; a first air blowing fan 4 which links the inside and outside of the protection sheet 3 and supplies first outside air R1 directly to the air layer E; and an indirect air blowing part 5 which links the inside and outside of the protection sheet 3 through a heat exchange pipe 6 buried in the ground G right under the snow mountain, and supplies second outside air R2 to the air layer E indirectly by making use of heat exchange.

Description

  The present invention relates to a snow melting speed adjustment system and a snow melting speed adjustment method used in a cold storage facility using snowy mountains.

  Conventionally, it has been known that snow is created in the shape of a snowy mountain, and the entire snowy mountain is covered with a heat insulating material such as a chip made of straw or rice husk, and such a snowy mountain is stored until use in summer. In summer, snowmelt water is used. In this case, in order to reduce the amount of natural melting of snow, it is necessary to increase the thickness of the heat insulating material. However, if the thickness is increased, a sufficient amount of snow melting (cold heat) cannot be obtained during summer use. In addition, a method of adjusting the thickness of the heat insulating material in the summer has been implemented, but there are cases where cavities are generated due to uneven snow melting inside the snowy mountains, which makes the work unstable and reduces work efficiency. It was.

Therefore, a storage facility configured to cover a snowy mountain with a balloon to which air is supplied is disclosed, for example, in Patent Document 1 instead of the above-described storage covering the heat insulating material.
In Patent Document 1, the side and top surfaces of the stacked snowy mountains are covered by arranging a large number of balloons such as resin closely, and the air in the balloons is supplied and exhausted to control the melting speed of the snowy mountains. On the other hand, it describes a cooling device that uses the cold heat of a snowy mountain as a cooling heat source.

JP 2009-174814 A

However, the snow mountain storage facility using the above-described conventional balloon has the following problems.
That is, in Patent Document 1, the snow mountain is covered with a structure in which a large number of balloons are brought into close contact with each other, and air is supplied to and exhausted from the individual balloons. Therefore, there is a problem that the structure is complicated and the equipment cost increases.
In Patent Document 1, the amount of air supplied to each of a large number of balloons is varied, and the air temperature and the balloon thickness in the balloon are adjusted to adjust the heat insulation performance of the entire balloon, and the melting rate of the snow mountain is adjusted. I have control. In addition, it is necessary to control the snow mountain temperature through the air layers in many balloons at the same time, and it is necessary to keep the internal pressure of each balloon constant. There is a problem that it is difficult to manage the amount of air to be performed and that it cannot be managed with high accuracy.

  The present invention has been made in view of the above-mentioned problems, and by supplying the outside air directly to the air layer in contact with the snowy mountain with a simple and low-cost structure, the snow melting speed can be easily and It is an object of the present invention to provide a snow melting speed adjustment system and a snow melting speed adjustment method that can be adjusted with high accuracy.

  In order to achieve the above object, the snow melting speed adjustment system according to the present invention is a snow melting speed adjustment system used in a snow mountain storage unit that uses the cold heat of a snow mountain as a cooling heat source, and an air layer is sealed between the snow mountain and the snow mountain. A protective sheet that covers the outer surface of the protective sheet, a first supply unit that communicates the inside and outside of the protective sheet and directly supplies outside air to the air layer, and the inside and outside of the protective sheet are embedded in the ground directly below the snowy mountain. And a second supply unit that communicates via the heat exchange pipe to supply outside air to the air layer.

  Further, in the snow melting speed adjusting method according to the present invention, a protective sheet for covering the air layer in a hermetically sealed state with the snow mountain is provided, and the snow melting speed adjusting method for the snow mountain storage unit using the cold heat of the snow mountain as a cooling heat source. The process of supplying the outside air directly to the air layer inside the protective sheet when the snow melts in the snow mountain, and the inside and outside of the protective sheet are passed through the ground directly under the snow mountain when the snow mountain is kept warm. And a step of supplying outside air to the air layer after exchanging heat with each other.

  In this invention, the pressure in a protection sheet can be kept constant by supplying external air directly or via heat exchange piping into the inside of the protection sheet which covers an snowy mountain by providing an air layer. And, as a supply means of the outside air, by selecting the first supply part to be supplied directly and the second supply part to be supplied after passing through the heat exchange pipe, and by changing the amount of air blown in the protective sheet, The temperature of the air layer can be adjusted. In the second supply section, for example, outside air at room temperature or higher passes through a heat exchange pipe embedded in the ground cooled by snowmelt water just below the snowy mountain, so that heat exchange is performed between the low-temperature soil and the outside air. The cooled low temperature outside air can be supplied into the protective sheet. As a result, the temperature of the air layer can be kept low and the snow melting speed of the snow mountain can be delayed.

For example, in the summer, when the cold heat of snowmelt water is used as a cooling heat source, the outside air can be directly supplied into the protective sheet by the first supply unit to promote snowmelt in the snowy mountains.
On the other hand, when storing the snowy mountain when the outside air temperature is high, the outside air is passed through the heat exchange pipe of the second supply unit, and the low temperature outside air heat-exchanged in the ground directly under the snowy mountain is put in the protective sheet. By supplying and adjusting the temperature of the air layer to a low temperature, the snow melting speed can be delayed, and the snow mountain can be stored for a long time. For example, when storing snowy mountains in winter or early spring, low temperature outside air is directly supplied into the protective sheet by the first supply unit, and the internal pressure of the protective sheet is kept constant, and the temperature of the air layer is maintained. Can also be maintained at a low temperature to suppress the melting of snow in the snowy mountains.

  And in this invention, in addition to selection of the said 1st supply part and a 2nd supply part, an air layer can be easily adjusted to desired temperature by changing each ventilation volume. Therefore, appropriate snow melting speed adjustment can be performed according to the weather conditions outside the protective sheet.

  Further, in the present invention, since the outside air is supplied to the inside of the protective sheet, complicated control for sending air to a plurality of partitioned air layers is unnecessary, and the structure is simplified. , Equipment costs can be reduced.

  In the snow melting speed adjustment system and the snow melting speed adjustment method according to the present invention, it is preferable that supply amount control means for adjusting the supply amounts of the first supply unit and the second supply unit is provided.

  In the snow melting speed adjusting method according to the present invention, it is preferable to adjust the supply amount of outside air according to the outside air temperature.

  According to the present invention, by controlling the amount of outside air supplied by the first supply unit and the second supply unit according to the temperature, internal pressure, etc. in the protective sheet, the snow melting speed is adjusted accurately and steplessly. be able to. And the temperature, pressure, etc. in the said protection sheet can be automatically controlled based on the detection value by a sensor, adjustment and operation by an operator can be reduced, and it becomes possible to aim at cost reduction. .

  In the snow melting speed adjustment system according to the present invention, it is preferable that the first supply unit and the second supply unit are provided with check valves that restrict the flow from the inside of the protective sheet to the outside.

  In this case, the air supplied into the protective sheet does not escape to the outside of the protective sheet by the check valve, so the internal pressure of the protective sheet is maintained, the air layer is maintained at a constant amount, and the temperature adjustment of the air layer is stable. Can be made.

  In the snow melting speed adjustment system according to the present invention, it is preferable that the heat exchange pipe has annular ribs formed on the outer peripheral surface at regular intervals along the length direction.

  In this case, the surface area of the outer peripheral surface of the heat exchange pipe is increased by the plurality of annular ribs, and the contact area with the snowmelt water in the ground immediately below the snowy mountain is increased, so that the heat exchange efficiency can be further improved.

  In the snow melting speed adjustment system according to the present invention, it is preferable that the protective sheet is provided with a release valve that allows air to flow from the inside of the protective sheet to the outside in accordance with an increase in pressure in the protective sheet. .

  In the snow melting speed adjusting method according to the present invention, it is preferable to release air from the inside of the protective sheet to the outside in accordance with an increase in pressure in the protective sheet.

  In this invention, when the internal pressure of a protection sheet rises by direct sunlight etc., the air of an air layer can be discharge | released outside the protection sheet.

  In the snow melting speed adjustment system according to the present invention, it is preferable that the heat exchange pipe is provided with a dew condensation water discharge unit for discharging the dew condensation water inside.

  In this case, the dew condensation water generated by heat exchange in the heat exchange pipe can be discharged out of the heat exchange pipe by the dew condensation water discharge part, and the heat exchange efficiency is reduced due to the accumulation of dew condensation water in the pipe. Can be prevented.

  Further, in the snow melting speed adjustment system according to the present invention, the second supply unit is provided with an air supply fan for blowing outside air to the air layer, and the air supply fan is located upstream of the heat exchange pipe. It is preferable to be provided on the outside air intake portion side which is disposed outside the protective sheet.

  In this case, since the air supply fan is disposed on the outside air intake side, the dew condensation water in the heat exchange pipe can be guided to the dew condensation water discharge unit together with the outside air sent by the air supply fan. Condensed water can be discharged well.

  According to the snow melting speed adjusting system and the snow melting speed adjusting method of the present invention, the snow melting speed can be easily adjusted by supplying the outside air directly to the air layer in contact with the snow mountain with a simple and low cost structure. And it can be adjusted with high accuracy.

It is a figure showing the whole snow melting speed adjustment system composition by an embodiment of the invention. It is the figure which showed typically the snow melting speed adjustment system of FIG. It is a figure for demonstrating the snow melting speed adjustment method, Comprising: (a) is a figure which shows the time of preservation | save of a snowy mountain, (b) is a figure which shows the time of the cold use of a snowy mountain.

  Hereinafter, a snow melting speed adjustment system and a snow melting speed adjustment method according to embodiments of the present invention will be described with reference to the drawings.

Reference numeral 1 in FIG. 1 denotes a snow melting speed adjustment system according to the present embodiment, which uses a cold heat of a snow mountain 2 formed in the winter as a cooling heat source and sends the cold heat to a building (not shown). Used for P.
In addition, as the snow mountain 2, the snow by snow removal can be used, and it accumulates by the magnitude | size according to the utilization purpose of cold heat.

  Specifically, the snow melting speed adjustment system 1 communicates the protective sheet 3 that covers the air layer E so that it can be formed in a sealed state between the snow mountain 2 and the inside (the air layer E) of the protective sheet 3 and the outside. , Heat exchange in which the first air supply fan 4 (first supply unit) that directly supplies outside air (first outside air R1) to the air layer E and the inside and outside of the protective sheet 3 are embedded in the ground G directly under the snowy mountains. An indirect air supply unit 5 (second supply unit) that communicates with the pipe 6 and supplies the outside air (second outside air R2) indirectly to the air layer E by heat exchange is provided.

The protective sheet 3 is a material having a function of a heat insulating material (heat shielding material) that delays the melting of the snowy mountain S, and a non-water-permeable flexible thin resin sheet can be used. The thing of the magnitude | size which can open and cover all the upper surfaces and side surfaces of a predetermined space (the above-mentioned air layer E) is used. The protective sheet 3 may be one sheet or may be divided into a plurality of parts. In this case, the connecting portions are connected in an airtight manner by adhesion or welding.
Further, the outer peripheral edge 3a of the protective sheet 3 is provided in an airtight state with respect to the ground G by anchors (not shown) over the entire circumference. The air layer E inside the protective sheet 3 is supplied and exhausted with constant air so that a predetermined internal pressure is maintained.

  As shown in FIG. 2, the first air supply fan 4 is disposed so as to penetrate the protective sheet 3 in an airtight manner. The first blowing part 41 of the first air supply fan 4 is provided with a check valve (not shown) that restricts the flow from the inside of the protective sheet 3 to the outside.

  The indirect air supply unit 5 communicates the inside and the outside of the protective sheet 3, and the heat exchange pipe 6 embedded in the ground G directly under the snowy mountain, and the external end of the heat exchange pipe 6 ( An outside air intake section 7 provided at the upstream end), a second air supply fan 8 arranged outside the protective sheet 3 at a position downstream of the outside air intake section 7 of the heat exchange pipe 6, and a heat exchange pipe 6 and a second blow-out portion 9 provided at the inner end (downstream end).

The heat exchange pipe 6 is a pipe material for passing outside air through the cooled ground directly under the snowy mountains and sending it into the protective sheet 3. For example, a hard polyvinyl chloride pipe often used in sewers is used. An annular rib 6a is formed on the outer peripheral surface at regular intervals along the length direction. That is, the heat exchange pipe 6 has an upstream end 6b protruding toward the ground outside the protective sheet 3 and a downstream end 6c disposed inside the protective sheet 3, and an intermediate portion in the pipe length direction. Is embedded in the ground G with the extending direction substantially horizontal.
In addition, the heat exchange piping 6 of the part embed | buried in the ground G is not limited to a straight line, You may meander and arrange | position in the plane area directly under the snowy mountain S.

Further, the heat exchange pipe 6 is provided with a dew condensation water discharge pipe 11 (a dew condensation water discharge part) for discharging the dew condensation water generated in the pipe. Thereby, the dew condensation water generated by heat exchange in the heat exchange pipe 6 can be discharged to the outside of the heat exchange pipe 6 by the dew condensation water discharge pipe 11, and the heat exchange efficiency decreases due to the dew condensation water accumulating in the pipe. Can be prevented.
Furthermore, since the 2nd air supply fan 8 is arrange | positioned at the external air intake part 7 side, the dew condensation water in the heat exchange piping 6 is guided to the dew condensation water discharge pipe 11 with the external air sent by the 2nd air supply fan 8. This has the advantage that the condensed water can be discharged efficiently.

  The 2nd blowing part 9 is arrange | positioned inside the protection sheet 3, and the non-return valve (illustration omitted) which regulates the distribution | circulation from the inside of the protection sheet 3 to the exterior (outside air intake part 7 side) via the heat exchange piping 6. Is provided.

  Further, the protective sheet 3 is provided with a release valve 12 for circulating air from the air layer E in the protective sheet 3 to the outside. The release valve 12 discharges the air inside the protective sheet 3 to the outside when the pressure in the protective sheet 3 becomes higher than a set pressure, and keeps the pressure inside the protective sheet 3 properly. is there.

  As shown in FIG. 1, in the snow melting speed adjustment system 1 of the present embodiment, a supply amount control unit 10 (supply amount control means) that adjusts the supply amounts of the first air supply fan 4 and the indirect air supply unit 5. Is provided. Specifically, the supply amount control unit 10 is connected to the first air supply fan 4 and the second air supply fan 8, and the first air supply air according to the temperature detected by the temperature sensor 13 provided in the protective sheet 3. Either the supply means by the fan 4 or the supply means by the second air supply fan 8 is selected, and the amount of air supplied to the air layer E by the selected one air supply fan 4 (or 8) Is controlling. Here, the quantity, attachment position, etc. of the temperature sensor 13 can be set arbitrarily.

  In the present embodiment, the on / off operation of the first air supply fan 4 or the second air supply fan 8 is automatically performed by the supply amount control unit 10 and the air supply amount is set, but it is automatic. It is not limited to. For example, the supply amount control unit 10 controls the selection of the air supply fans 4 and 8 and displays the air flow rate on a monitor or the like, and the operator manually operates the air supply fan 4 based on the control result (display result). , 8 may be turned on / off.

  Further, the supply amount control unit 10 controls the air supply amount of the air supply fans 4 and 8 and the discharge valve 12 in a well-balanced manner according to detection by a pressure sensor (not shown) provided in the protective sheet 3. Has also been done.

According to the snow melting speed adjusting system and the snow melting speed adjusting method according to the present embodiment described above, the following operational effects are obtained.
As shown in FIG. 1 and FIG. 2, in the present embodiment, by supplying outside air directly or via a heat exchange pipe 6 to the inside of the protective sheet 3 that covers the snowy mountain 2 by providing the air layer E, The pressure in the protective sheet 3 can be kept constant. Then, as the outside air supply means, the first air supply fan 4 to be directly supplied and the indirect air supply section 5 (second air supply fan 8) to be supplied after passing through the heat exchange pipe 6 are selected, and The temperature of the air layer E can be adjusted by changing the amount of air blown in the protective sheet 3.
In the indirect air supply unit 5, for example, the second outside air R <b> 2 having a temperature equal to or higher than normal temperature passes through the heat exchange pipe 6 embedded in the ground G cooled by the snowmelt water immediately below the snowy mountain, so that the low temperature soil and the outside air Heat exchange is performed between them, and the cooled low temperature outside air can be supplied into the protective sheet 3. As a result, the temperature of the air layer E can be kept low and the snow melting speed of the snow mountain 2 can be delayed.

As shown in FIG. 3A, when the snowy mountain 2 is stored when the outside air temperature is high, the outside air is passed through the heat exchange pipe 6 from the second air supply fan 8 as shown in FIG. By supplying the low temperature outside air heat-exchanged in the ground G directly under the snowy mountain into the protective sheet 3 and adjusting the temperature of the air layer E to a low temperature, it becomes possible to delay the snow melting speed, and long-term storage of the snowy mountain 2 Is possible. For example, when storing the snowy mountain 2 in winter or early spring, for example, low temperature outside air is supplied directly into the protective sheet 3 by the first air supply fan 4 to keep the internal pressure of the protective sheet 3 constant, The temperature of the air layer E can also be maintained at a low temperature, and the promotion of snow melting in the snowy mountain 2 can be suppressed.
In addition, as shown in FIG. 3 (b), in the summer, when using the cold heat of snowmelt water as a cooling heat source, the outside air is directly supplied into the protective sheet 3 by the first air supply fan 4, and the snow mountain 2 It can promote snow melting.

  And in addition to selection of the 1st air supply fan 4 and the indirect air supply part 5 (2nd air supply fan 8), the air layer E is easily adjusted to desired temperature by changing each ventilation volume. Can do. Therefore, an appropriate snow melting speed can be adjusted according to the weather conditions outside the protective sheet 3.

  In the present embodiment, since the outside air is supplied to the inside of the protective sheet 3, complicated control for sending air to a plurality of partitioned air layers is unnecessary, and the structure is simple. As a result, the cost of the equipment can be reduced.

  Further, according to the present embodiment, as shown in FIG. 1, the supply amount control unit 10 controls the supply amount of outside air by the first air supply fan 4 and the indirect air supply unit 5 (second air supply fan 8). By controlling according to the temperature and the internal pressure in the protective sheet 3, the snow melting speed can be adjusted accurately and steplessly. And the temperature and pressure in the said protective sheet 3 can be automatically controlled based on the detection value by a sensor, adjustment and operation by an operator can be decreased, and it becomes possible to aim at cost reduction. .

  Further, since the air supplied into the protective sheet 3 does not escape to the outside of the protective sheet 3 by the check valve, the internal pressure of the protective sheet 3 is maintained, the air layer E is maintained at a constant amount, and the air layer E The temperature adjustment can be stabilized.

  Furthermore, since the annular rib 6a is formed on the outer peripheral surface of the heat exchange pipe 6 at regular intervals along the length direction, the surface area of the outer peripheral surface of the heat exchange pipe 6 is increased by the plurality of annular ribs 6a. Since the contact area with the snowmelt water in the ground directly below the snowy mountain increases, the heat exchange efficiency can be further improved.

  In addition, since the release valve 12 is provided in the protective sheet 3, the air in the air layer E can be released to the outside of the protective sheet 3 when the internal pressure of the protective sheet 3 is increased by direct sunlight or the like.

  As described above, in the snow melting speed adjustment system and the snow melting speed adjustment method according to the present embodiment, the snow melting speed can be adjusted easily and accurately by supplying outside air directly to the air layer E in contact with the snowy mountain 2. can do.

The embodiments of the snow melting speed adjustment system and the snow melting speed adjustment method according to the present invention have been described above. However, the present invention is not limited to the above embodiments, and can be appropriately changed without departing from the spirit of the present invention. It is.
For example, in the present embodiment described above, hard vinyl chloride having annular ribs 6a at regular intervals on the outer peripheral surface is adopted as the heat exchange pipe 6, but this is limited to such a configuration. For example, the annular ribs 6a may not be at regular intervals, and the ribs are not limited to being annular. Further, it may be a pipe in which the rib itself is omitted.

  Moreover, although the 1st air supply fan 4 is arrange | positioned through the protection sheet 3 in this Embodiment, it is not limited to this position. For example, it is also possible to arrange the first air supply fan 4 between the protective sheet 3 and the ground. Alternatively, the first air supply fan 4 may be disposed outside the protective sheet 3, and the blowout end portion of the pipe connected to the first air supply fan 4 may be disposed inside the protective sheet 3.

  Further, the shape, size, and the like of the snow mountain 2 can be arbitrarily set, and the positions and configurations of the first supply unit and the second supply unit may be determined corresponding to the snow mountain 2.

  In addition, it is possible to appropriately replace the components in the above-described embodiments with known components without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Snow melting speed adjustment system 2 Snow mountain 3 Protection sheet 4 1st air supply fan (1st supply part)
5 Indirect air supply section (second supply section)
6 Heat Exchange Piping 6a Annular Rib 7 Outside Air Intake Unit 8 Second Air Supply Fan 9 Second Blowing Unit 10 Supply Amount Control Unit (Supply Amount Control Unit)
11 Condensate drain pipe (condensate drain)
12 Release valve 13 Temperature sensor 41 First outlet E Air layer

Claims (10)

A snow melting speed adjustment system used in a snow mountain storage unit that uses the cold heat of a snow mountain as a cooling heat source,
A protective sheet that covers the air layer so that it can be formed in a sealed state with the snowy mountain;
A first supply unit that communicates the inside and the outside of the protective sheet and directly supplies outside air to the air layer;
A second supply unit that communicates the inside and outside of the protective sheet via a heat exchange pipe that is embedded in the ground directly below the snowy mountain, and supplies outside air to the air layer;
A snow melting speed adjustment system characterized by comprising:   The snow melting speed adjustment system according to claim 1, further comprising supply amount control means for adjusting a supply amount of the first supply unit and the second supply unit.   The snow melting speed according to claim 1 or 2, wherein the first supply unit and the second supply unit are provided with a check valve for restricting the flow from the inside of the protective sheet to the outside. Adjustment system.   4. The snow melting speed adjustment system according to claim 1, wherein ribs are formed on the outer circumferential surface of the heat exchange pipe at intervals along the length direction. 5.   5. The discharge valve according to claim 1, wherein the protective sheet is provided with a release valve that circulates air from the inside of the protective sheet to the outside in response to an increase in pressure in the protective sheet. The snow melting speed adjustment system according to item 1.   6. The snow melting speed adjustment system according to claim 1, wherein the heat exchange pipe is provided with a dew condensation water discharge unit that discharges internal dew condensation water. The second supply unit is provided with an air supply fan for blowing outside air to the air layer,
7. The snow melting speed adjustment according to claim 6, wherein the air supply fan is located on an upstream side of the heat exchange pipe and is provided on an outside air intake portion side disposed outside the protective sheet. system. A method for adjusting a snow melting speed of a snowy mountain storage unit provided with a protective sheet that covers an air layer in a hermetically sealed state with a snowy mountain, and uses the cold heat of the snowy mountain as a cooling heat source,
Supplying the outside air directly to the air layer inside the protective sheet when the snow mountain melts;
Supplying heat to the air layer after heat exchange between the ground and the outside air by passing the inside and outside of the protective sheet through the ground directly under the snow mountain when the snow mountain is kept warm; ,
A method of adjusting a snow melting speed, comprising:   The method for adjusting a snow melting speed according to claim 8, wherein the supply amount of the outside air is adjusted according to an outside air temperature.   The snow melting speed adjusting method according to claim 8 or 9, wherein air is discharged from the inside of the protective sheet to the outside in accordance with an increase in pressure in the protective sheet.

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