JP6202730B2 - Snow and ice cold heat source system and cooling system using this as a cold heat source - Google Patents

Description

  The present invention relates to a snow and ice cooling heat source system that uses cold energy of snow and ice as a cooling heat source and a cooling system that uses this as a cooling source.

  Conventionally, snow produced by snow removal in a snowfall area has been piled up and a huge amount of cold energy has been left unused. On the other hand, in recent years, in the midsummer when power demand peaks, the power supply and demand in the Tokyo metropolitan area, etc. are tightened, and various power saving measures such as raising the set temperature of cooling are implemented, and a certain effect is achieved.

In recent years, as shown in Patent Documents 1 to 3 below, various techniques for using snow accumulated in a snowfall area in winter as a heat source for cooling have been developed. In order to realize such technology in areas with relatively mild snowfall, such as the Tokyo metropolitan area, technology for transporting snow accumulated in snowfall areas is necessary. Ships and trailers carrying goods have the problem of single cargo transportation where the return route is returned with empty cargo, and as an idea to eliminate the waste, return to the metropolitan area with snow accumulated in the snowfall area instead of returning with empty cargo draft proposed and is becoming attention as friendly technologies in environment such as CO ₂ reduction.

  In the following Patent Document 1, sherbet-shaped ice stored in an ice storage tank is exposed on the surface of cold water at least 30% of the height, and water is sprinkled on the sherbet-shaped ice exposed on the water surface. And the method of taking out cold water by melting the said sherbet-like ice is disclosed. Moreover, in the following patent document 2, the temperature of the cold water taken in from the water intake provided below the ice heat storage tank is monitored, and according to the temperature change, a water spray nozzle is used using a bypass pipe or a temperature control means. An ice heat storage system is disclosed that can adjust the amount and / or temperature of the return water sprayed from the water.

  Furthermore, in Patent Document 3 below, a permeable pavement that allows cold water generated from snow and ice to pass therethrough is provided on the surface, and a heat exchange circuit pipe that circulates a refrigerant that exchanges heat with the cold water is laid inside the permeable pavement. And a circulation pump that sends the refrigerant in the heat exchange circuit pipe to the cold demand destination and circulates the refrigerant deprived of the cold heat at the cold demand destination into the heat exchange circuit pipe. A cold energy recovery system for snow and ice cooling is disclosed.

JP 7-63377 A JP-A-7-91693 JP 2011-7029 A

  However, in the method of taking out the cold water by melting the ice by sprinkling water from the watering nozzle described in Patent Documents 1 and 2, the melting of the ice proceeds only in the portion directly hit by the water sprayed from the watering nozzle, and as a result, the water is sprayed. There is a concern that a bypass path may be formed in which the water flows without contacting the ice, and there is a concern that the cooling energy recovery efficiency is lowered and a stable cooling output cannot be obtained.

  Moreover, in the said patent document 3, although the permeable pavement which allows the cold water generated from snow and ice to pass through is provided, since a large amount of earth and sand are mixed in the melted snow, the permeable pavement is clogged and cold water is generated. It becomes difficult to pass through, and there is a possibility that the efficiency of cold energy recovery will be reduced.

  In addition, when heat exchange equipment is placed directly in the melting zone of snow and ice, earth and sand mixed with snow and ice adheres to the surroundings of the heat exchange equipment, preventing contact with cold water, reducing the heat recovery efficiency and stabilizing There is a risk that the chilled heat output cannot be obtained. In addition, since snow and ice contain earth and sand such as mud and garbage, it is difficult to send cold water obtained by melting snow and ice directly to the cooling equipment.

  Accordingly, a main object of the present invention is to provide a snow and ice cold heat source system that can efficiently collect cold energy from snow and ice and that can stably obtain a cold output and a cooling system that uses this as a cold source.

In order to solve the above-mentioned problem, as the present invention according to claim 1, the circulating water is stored, and the circulating water is cooled by melting the snow and ice while the snow and ice are poured into the stored circulating water. A heat exchange tank provided with a heat exchanger that is installed in a stage subsequent to the melting tank and performs heat exchange between the circulating water and the refrigerant of the cooling facility,
Between the melting tank and the heat exchange tank is provided an overflow weir configured so that the circulating water of the melting tank that has reached a predetermined water level flows out to the heat exchange tank side ,
Circulating water that has flowed into the melting tank flows in the horizontal direction on the surface layer of the melting tank, proceeds to the downstream side while melting the snow and ice to obtain cold water, and partly overflows from the overflow weir and the heat exchange A snow and ice cooling heat source system is provided, wherein a water flow in the melting tank flowing out into the tank is formed .

  In the first aspect of the invention, as the snow and ice cooling heat source system, a melting tank in which the introduced snow and ice are melted in order from the upstream side of the circulating water, and a heat exchange tank in which a heat exchanger of the cooling equipment is disposed. Separately installed. For this reason, only the cold water melted in the melting tank flows into the heat exchange tank as circulating water, and the heat exchanger can efficiently recover the cold energy and obtain a stable cold output. Moreover, since the earth and sand mixed in snow and ice settle in the melting tank, and the separation of the cold water and the earth and sand can be performed efficiently, the amount of earth and sand adhering to the heat exchanger is greatly reduced, and the recovery efficiency of the cold energy is improved.

  Further, in the snow and ice cold heat source system, an overflow weir is provided between the melting tank and the heat exchange tank so that the circulating water of the melting tank that has reached a predetermined water level flows out to the heat exchange tank side. Because it is configured, as will be described in detail later, when flowing from the melting tank to the heat exchange tank, cold water does not concentrate and flows in a wide range, so heat exchange in the heat exchange tank Efficiency can be improved.

As this invention which concerns on Claim 2, the circulating water injection tank in which the said circulating water is injected in the front | former stage of the said melting tank is provided,
2. An overflow weir is provided between the circulating water injection tank and the melting tank so that the circulating water of the circulating water injection tank reaching a predetermined water level flows out to the melting tank side. A snow and ice cold heat source system as described is provided.

  In the invention according to the second aspect, a circulating water injection tank is provided in front of the melting tank, an overflow weir is provided between the circulating water injection tank and the melting tank, and the circulation reaches a predetermined water level. Circulating water in the water injection tank flows out to the melting tank side. For this reason, as will be described in detail later, the flow of the circulating water flowing into the melting tank from the circulating water injection tank is gentle with respect to the entire flow rate, and the circulating water flowing into the melting tank over the overflow weir is melted. It flows in the horizontal direction on the surface of the tank. Therefore, the circulating water flowing through the surface layer contacts the snow ice to melt the snow ice, and the cold water just after melting easily flows from the downstream overflow weir to the heat exchange tank side. For this reason, cold energy can be efficiently recovered from snow and ice.

  According to a third aspect of the present invention, there is provided the snow and ice cold heat source system according to the second aspect, wherein each of the overflow weirs is provided over substantially the entire width of the circulating water injection tank, the melting tank, and the heat exchange tank. The

  In the invention according to the third aspect, since the overflow weir is provided over almost the entire width of the circulating water injection tank, the melting tank, and the heat exchange tank, the contact opportunity between the snow ice and the circulating water in the melting tank. Thus, snow and ice can be easily melted and cold water can be easily obtained, and in the heat exchange tank, the circulating water cooled in the melting tank can easily come into contact with the heat exchanger, thereby improving the heat exchange efficiency.

According to a fourth aspect of the present invention, there is provided a melting tank in which circulating water is stored, snow and ice are poured into the stored circulating water and the circulating water is cooled by melting the snow and ice, and the melting tank A heat exchange tank installed in a rear stage and provided with a heat exchanger for exchanging heat between the circulating water and the refrigerant of the cooling facility, and the circulating water provided in the front stage of the melting tank are poured. And a circulating water injection tank
An overflow weir is provided between the melting tank and the heat exchange tank so that the circulating water of the melting tank that has reached a predetermined water level flows out to the heat exchange tank side, and the circulating water injection tank And an overflow weir configured so that the circulating water of the circulating water injection tank that has reached a predetermined water level flows out to the melting tank side,
The head of the circulating water overflowing the overflow weir between the melting tank and the heat exchange tank is the circulating water overflowing the overflow weir between the circulating water injection tank and the melting tank. There is provided a snow and ice cooling heat source system characterized by being set to be larger than a head.

  In the invention according to claim 4, heat exchange is performed by setting a drop when the circulating water flows from the melting tank to the heat exchange tank to be larger than a drop when flowing from the circulating water injection tank to the melting tank. The convection of the circulating water in the tank is promoted, the stirring efficiency outside the heat exchanger is improved, and the heat exchange efficiency by the heat exchanger is increased.

As the present invention according to claim 5, circulating water is stored, and a melting tank in which snow and ice are poured into the stored circulating water and the circulating water is cooled by melting the snow and ice, and the melting tank A heat exchange tank installed in a subsequent stage and provided with a heat exchanger for exchanging heat between the circulating water and the refrigerant of the cooling facility,
Between the melting tank and the heat exchange tank is provided an overflow weir configured so that the circulating water of the melting tank that has reached a predetermined water level flows out to the heat exchange tank side,
A pipe for pouring the circulating water is disposed in the melting tank,
The pipe includes a vertical pipe lowered to the upper surface of the melting tank, and a plurality of openings or slits extending horizontally from the lower end of the vertical pipe and allowing the circulating water to flow out in the horizontal direction on the pipe peripheral surface. There is provided a snow and ice cold heat source system characterized by comprising a formed horizontal tube.

  The invention according to claim 5 is a snow and ice cooling heat source system according to another embodiment, and when water is circulated into a melting tank, water is directly injected through a pipe. The pipe includes a vertical pipe that is lowered to the upper surface of the melting tank, and a plurality of openings or slits that extend in the horizontal direction from the lower end of the vertical pipe and that allows the circulating water to flow out in the horizontal direction on the pipe peripheral surface. What consists of the horizontal pipe | tube in which was formed is used. As a result, the water flowing in the horizontal direction on the surface of the melting tank is generated by the circulating water flowing out from the opening or slit of the horizontal pipe, the contact opportunity between the circulating water and snow and ice is increased, and the cold water can be easily taken out. The efficiency of cold energy recovery in the exchange tank can be improved.

According to a sixth aspect of the present invention, there is provided a melting tank in which circulating water is stored, snow and ice are poured into the stored circulating water and the circulating water is cooled by melting the snow and ice, and the melting tank A heat exchange tank installed in a subsequent stage and provided with a heat exchanger for exchanging heat between the circulating water and the refrigerant of the cooling facility,
Between the melting tank and the heat exchange tank is provided an overflow weir configured so that the circulating water of the melting tank that has reached a predetermined water level flows out to the heat exchange tank side,
Depth of the heat exchanger vessel, snow ice cold heat source system characterized in that it is set smaller than the depth of the molten bath is provided.

  In the invention according to claim 6, by setting the water depth of the heat exchange tank relatively small, the flow rate of circulating water in the heat exchange tank is increased, the stirring efficiency outside the heat exchanger is improved, The heat exchange efficiency by the exchanger is increased.

As the present invention according to claim 7, circulating water is stored, snow and ice are poured into the stored circulating water, and the circulating water is cooled by melting the snow and ice, and the melting tank A heat exchange tank installed in a subsequent stage and provided with a heat exchanger for exchanging heat between the circulating water and the refrigerant of the cooling facility,
Between the melting tank and the heat exchange tank is provided an overflow weir configured so that the circulating water of the melting tank that has reached a predetermined water level flows out to the heat exchange tank side,
The water depth of the melting tank is set to a depth at which the introduced snow and ice floats on the water, and a snow and ice cooling heat source system is provided.

  In the invention according to claim 7, the water depth of the melting tank is set to a depth at which the introduced snow ice floats in the water, so that even if the snow ice melts and becomes smaller, the water flow causes the downstream side Therefore, it is difficult to bypass the water channel so that the circulating water does not come into contact with the snow and ice but flows into the heat exchange tank, increasing the chance of contact between the circulating water and the snow and ice, and melting the snow and ice. Cold energy can be recovered without waste until it runs out. Moreover, by making the snow and ice float in the melting tank, the earth and sand mixed in the snow and ice can easily settle, and only the melted cold water easily flows into the heat exchange tank on the downstream side.

As the present invention according to claim 8, circulating water is stored, and snow and ice are poured into the stored circulating water and the circulating water is cooled by melting the snow and ice, and the melting tank A heat exchange tank installed in a subsequent stage and provided with a heat exchanger for exchanging heat between the circulating water and the refrigerant of the cooling facility,
Between the melting tank and the heat exchange tank is provided an overflow weir configured so that the circulating water of the melting tank that has reached a predetermined water level flows out to the heat exchange tank side,
In the molten bath, and characterized in that it is turned snow ice is so as not to contact the overflow weir downstream, the fence member spaced from the downstream side of the overflow weir prevents the entry of snow and ice is provided A snow and ice cold heat source system is provided.

  In the invention of claim 8, when snow and ice contact the downstream overflow weir in the melting tank, the overflow of the circulating water in the contacted portion is blocked, and the flow from the overflow weir is not uniform, In order to prevent snow and ice from coming into contact with the overflow weir, a fence member such as a wire mesh is provided to prevent the entrance of snow and ice at a distance from the overflow overflow weir on the downstream side.

  The present invention according to claim 9 provides a cooling system characterized in that the snow and ice cooling heat source system according to any one of claims 1 to 8 is used as a cooling heat source.

  As described above in detail, according to the present invention, it is possible to provide a snow and ice cooling heat source system that can efficiently recover cooling energy from snow and ice, and a cooling system that uses this as a cooling heat source.

1 is a configuration diagram of a cooling system 1 according to the present invention. It is sectional drawing which shows the flow in the melting tank 6 of this snow ice cold heat source system 2. FIG. It is sectional drawing which shows the flow in the melting tank when not using an overflow weir. It is sectional drawing which shows the snow-ice-cooling heat source system 2 which concerns on another example. It is a graph which shows a performance test result at the time of using this snow and ice cold heat source system. It is a graph which shows the performance test result at the time of not using this snow ice cold heat source system 2. FIG. It is sectional drawing which shows the snow-ice-cooling heat source system 2 'which concerns on another form example. It is a fracture perspective view of melting tank 6 concerning snow and ice cold heat source system 2 '.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 1, a cooling system 1 according to the present invention includes a snow ice cooling heat source system 2 that uses snow and ice 8 as a cooling heat source, and a cooling facility that includes a heat exchanger 4 that receives the cooling heat of the snow ice cooling heat source system 2. 3. In addition, generally the well-known cooling equipment can be used for the said cooling equipment 3, Only the heat exchanger 4 through which a refrigerant | coolant flows is shown in the figure, and illustration was omitted about the other component.

  The snow and ice cold heat source system 2 is provided with a circulating water injection tank 5 in which circulating water is injected and the circulating water is stored up to a predetermined water level, and is installed in the subsequent stage of the circulating water injection tank 5. The circulating water flows in, and the circulating water is stored up to a predetermined water level, and the snow and ice 8 is poured into the stored circulating water, and the circulating water is cooled by melting and melting the circulating water. The circulating water in the melting tank 6 that is installed in the rear stage of the tank 6 and the melting tank 6 flows in, and the circulating water is stored up to a predetermined water level, and between the circulating water and the refrigerant of the cooling equipment 3 And a heat exchange tank 7 provided with a heat exchanger 4 for performing heat exchange.

  In the heat exchanger 4, a pipe made of SUS, copper, or the like in which a refrigerant flows is introduced directly into circulating water accumulated in the heat exchange tank 7, and indirectly between the refrigerant inside the pipe and the circulating water. Heat exchange is performed. As the pipe, a reciprocating pipe that is repeatedly folded in the horizontal direction, a coil-type pipe wound in a circular or rectangular coil shape, or the like can be used. In order to improve heat exchange efficiency, it is preferable to interpose a spacer between adjacent pipes to eliminate contact between the pipes and to facilitate circulation of the circulating water. Moreover, in order to improve the stirring efficiency outside the heat exchanger 4, a stirring device in various water tanks may be provided, such as a submersible pump having a sprinkler head attached to the discharge port.

  The snow and ice cold heat source system 2 is configured such that circulating water that has reached a predetermined water level in the circulating water injection tank 5 flows out between the circulating water injection tank 5 and the melting tank 6 toward the melting tank 6. An overflow overflow weir 9 is provided, and between the melting tank 6 and the heat exchange tank 7, circulating water that has reached a predetermined water level in the melting tank 6 flows out to the heat exchange tank 7 side. An overflow overflow weir 10 is provided.

  Further, a pipe 11 and a pump 12 are provided for returning the circulating water that has reached the heat exchange tank 7 to the circulating water injection tank 5. In order to keep the heat exchange tank 7 at a predetermined water level, an overflow weir is provided on the downstream side of the heat exchange tank 7 so that the circulating water that has reached the predetermined water level flows out. Alternatively, a branch path may be provided in the middle of the pipeline 11 and a part of the circulating water flowing through the pipeline 11 may be drained.

As the snow and ice 8, it is possible to cool and store the snow accumulated in the snowfall area in the winter and transport it to the place where the present cooling system 1 is installed. For example, when installing the cooling system 1 in the Tokyo metropolitan area, instead of storing the snow accumulated in the snowfall area in winter and returning it to the return route of the ship or trailer that transported the luggage from the metropolitan area to the snowfall area, Snow and ice 8 can be loaded and returned. As a result, the problem of one-piece transportation can be solved, the transportation cost of snow and ice 8 can be greatly reduced, and the generation of CO ₂ required for the operation of the cooling system 1 can be significantly reduced.

  Next, the flow of the circulating water will be described. As shown in FIG. 2, the circulating water poured into the circulating water injection tank 5 overflows the overflow weir 9 and flows into the melting tank 6. The snow ice 8 is melted in contact with the snow ice 8 put into the chilled water, and cold water is taken out. The circulating water cooled by the cold water overflows the overflow weir 10 and flows into the heat exchange tank 7, and contacts with the heat exchanger 4 in the heat exchange tank 7 and between the refrigerant flowing in the heat exchanger 4. Heat exchange takes place at.

  Thus, in the present snow and ice cold heat source system 2, the melting tank 6 that melts the introduced snow and ice 8 and the heat exchange tank 7 that performs heat exchange by the heat exchanger 4 are separately installed. Only the cold water melted in the tank 6 flows into the heat exchange tank 7 as circulating water. As a result, cold energy can be efficiently recovered by the heat exchanger 4 in the heat exchange tank 7, and a cold output can be stably obtained. On the other hand, since the earth and sand mixed in snow and ice settles in the melting tank 6 and is separated and can prevent the inflow of earth and sand to the heat exchange tank 7, the amount of earth and sand adhering to the heat exchanger 4 can be greatly reduced, Energy recovery efficiency is improved. Moreover, since the earth and sand mixed in the snow and ice 8 settles in the melting tank 6, the collection of earth and sand becomes easy.

  In particular, in the snow and ice cold heat source system 2, as shown in FIG. 2, a circulating water injection tank 5 is provided in front of the melting tank 6, and the circulating water in the circulating water injection tank 5 overflows the overflow weir 9. Since it is configured to flow and flow into the melting tank 6, the flow rate with respect to the entire flow rate becomes slower than the case where water is directly poured into the melting tank by piping or the like as shown in FIG. The circulating water flowing in from 5 flows in the horizontal direction in the surface layer of the melting tank 6, and proceeds to the downstream side while melting the snow and ice 8 to obtain cold water. The circulating water cooled by melting of the snow and ice 8 partially overflows from the overflow weir 10 on the downstream wall surface and flows out to the heat exchange tank 7, and partially contacts the downstream sidewall surface to the wall surface. It is converted into a flow along. Then, after circulating along the upstream side wall surface from the bottom surface, a circulating water flow in the melting tank 6 that flows through the surface layer is easily formed. For this reason, the circulating water which contacted with snow and ice and cooled by the melted water is likely to flow out to the heat exchange tank 7 side in the subsequent stage.

  On the other hand, as shown in FIG. 3, when water is poured directly into the melting tank from a pipe that has been lowered to the upper surface of the melting tank, if the same amount of water as that of the above overflow weir is to be supplied, Since the flow rate has to be high, the circulating water supplied to the melting tank sinks to the bottom, flows downstream along the bottom surface, abuts against the downstream wall surface, rises to the water surface, and partly The overflow dam 10 overflows and flows out to the heat exchange tank 7 side, and a circuit in the melting tank 6 is easily formed in which a part of the surface layer flows upstream while melting snow and ice. As described above, since the circuit does not have a circuit in which the melted water of snow and ice flows out to the heat exchange tank 7 as it is, the temperature of the circulating water flowing into the heat exchange tank 7 tends to increase, and the heat exchange efficiency in the heat exchange tank 7 is increased. Becomes worse.

  Furthermore, in the present snow and ice cold heat source system 2, since the overflow weir 10 overflows even when the circulating water flows from the melting tank 6 to the heat exchange tank 7, the cold water is not concentrated but dispersed widely. Since it comes to flow, the heat exchange efficiency in the heat exchange tank 7 improves further.

  The overflow weirs 9 and 10 are preferably provided over substantially the entire width of the circulating water injection tank 5, the melting tank 6 and the heat exchange tank 7, respectively. That is, the overflow weirs 9 and 10 are provided with a width substantially equal to the water tank width of each tank 5, 6, and 7. Thereby, in the melting tank 6, a contact area with the snow and ice 8 can be ensured over the entire width, and the snow and ice 8 are easily melted and cold water is easily obtained. Moreover, in the heat exchange tank 7, the contact area of the heat exchanger 4 and cold water can be ensured over the whole width, and heat exchange efficiency improves. The overflow weirs 9 and 10 may be formed with a width of 70% or more, preferably 80% or more, more preferably 90% or more of the width of each of the tanks 5, 6 and 7.

  Moreover, the drop of circulating water overflowing the overflow weir 10 between the melting tank 6 and the heat exchange tank 7 overflows the overflow weir 9 between the circulating water injection tank 5 and the melting tank 6. It is preferable to set larger than the fall of the circulating water. That is, the height from the water surface of the heat exchange tank 7 to the overflow weir 10 is set larger than the height from the water surface of the melting tank 6 to the overflow weir 9. By relatively increasing the head of the overflow weir 10 flowing into the heat exchange tank 7, the convection of the circulating water in the heat exchange tank 7 is increased, the stirring efficiency outside the heat exchanger 4 is improved, and the heat exchanger The heat exchange efficiency by 4 can be increased. Moreover, by making the head of the overflow weir 9 flowing into the melting tank 6 relatively small, the water flow when flowing into the melting tank 6 becomes small, and the circulating water easily flows through the surface layer of the melting tank 6, and snow ice 8 This improves the chance of contact with the circulating water and promotes the melting of the snow and ice 8.

  If the drop of the overflow weir 9 (height from the upper end of the overflow weir 9 to the water surface of the melting tank 6) is too large, the flow toward the bottom surface is formed by the fall of circulating water over the overflow weir 9. This is not preferable because the melted water of snow and ice cannot be efficiently poured into the heat exchange tank 7 as described above. Therefore, it is preferable that the drop of the overflow weir 9 is an extremely small drop so that the circulating water in the melting tank 6 does not flow back to the circulating water injection tank 5. The specific drop of the overflow weir 9 varies depending on the size and flow rate of the actual machine, but is preferably about 10 mm to 100 mm.

  By the way, it is preferable to set the water depth of the heat exchange tank 7 smaller than the water depth of the circulating water injection tank 5 and the melting tank 6. Thereby, the flow rate of the circulating water in the heat exchange tank 7 can be increased, and the heat exchange efficiency by the heat exchanger 4 can be improved. More specifically, the water depth of the heat exchange tank 7 is set to such a depth that the heat exchange part of the throw-in type heat exchanger 4 is submerged, that is, a depth substantially equal to the height of the heat exchange part of the heat exchanger 4. It is preferable.

  On the other hand, as shown in FIG. 1, the water depth of the melting tank 6 is preferably set to a depth at which the introduced snow ice 8 floats in the water. By providing the snow ice 8 in the melting tank 6 in a floating state, even if the snow ice melts and becomes small, the water flow gathers to the downstream side, so that the circulating water exchanges heat without contacting the snow ice. It is difficult to bypass the water channel that flows out to the tank 7, and the chance of contact between the circulating water and snow and ice increases. Moreover, the earth and sand mixed in the snow and ice 8 are easily settled, and the cold water and the earth and sand are easily separated.

  In the melting tank 6, as shown in FIG. 4, snow ice is allowed to enter at a distance from the downstream overflow weir 10 so that the introduced snow ice 8 does not contact the downstream overflow weir 10. It is preferable to provide a barrier member 14 for blocking. Accordingly, it is possible to prevent the snow and ice 8 from coming into contact with the overflow weir 10 and blocking the overflow of the circulating water in the contacted portion, thereby preventing the flow from the overflow weir 10 from becoming uneven. . As the fence member 14, a fence-shaped member such as a wire mesh, a perforated plate, a bar, or the like that can easily pass water and cannot pass snow and ice blocks of a certain size or larger can be used. It is preferable to provide a net member 14a such as a wire net or a net in the space between the overflow weir 10 and the fence member 14 so that floating dust or the like does not flow downstream.

  A performance test was conducted for the case where the snow and ice cold heat source system 2 was used and for the case where water injection to the melting tank shown in FIG. The results are shown in FIGS. The inlet temperature T2 is the temperature of the circulating water poured into the circulating water injection tank 5, the outlet temperature T1 is the temperature of the circulating water that has passed through the melting tank 6, and the heat output is the inlet temperature T2 and the outlet temperature. The difference in T1 is multiplied by the flow rate F, and the amount of heat is an integrated value of heat output.

  As a result, as shown in FIG. 5, the snow and ice cold heat source system 2 can keep the outlet temperature T <b> 1 low for a long time and can supply cold water to the heat exchange tank 7 for a long time. On the other hand, in the system shown in FIG. 3, as shown in FIG. 6, the outlet temperature T1 tends to rise immediately.

[Other examples]
As shown in FIG. 7, the snow / ice cold heat source system 2 ′ according to another embodiment is provided with a pipe 15 for pouring the circulating water, and snow / ice is poured into the circulating water. It comprises a melting tank 6 in which the circulating water is cooled by melting and a heat exchange tank 7 in which the heat exchanger 4 is disposed.

  As shown in FIG. 8, the pipe 15 extends in the horizontal direction parallel to the overflow pipe weir 10 on the downstream side from the vertical pipe 15 a that is lowered to the upper surface of the melting tank 6, and the pipe peripheral surface. And a horizontal pipe 15b in which a large number of openings 15c, 15c... (Or one or a plurality of slits extending in the pipe axis direction) through which the circulating water can flow in the horizontal direction toward the overflow dam 10 on the downstream side are formed. It is preferable to use one. Thereby, the circulating water flowing into the melting tank 6 from the opening 15c flows in the horizontal direction in the surface layer, and immediately after melting the snow ice 8 and taking out the cold heat, it easily flows into the heat exchange tank 7 over the overflow weir 10. Thus, a circuit in the melting tank 6 similar to the above-mentioned snow and ice cold heat source system 2 is formed, and the efficiency of recovering cold heat in the heat exchange tank 7 can be improved. The horizontal tube 15b is preferably formed over substantially the entire width of the melting tank 6. The horizontal pipe 15b is preferably installed at a height substantially equal to the overflow dam 10 on the downstream side, and part or all of the horizontal pipe 15b is submerged.

  DESCRIPTION OF SYMBOLS 1 ... Cooling system, 2 ... Snow ice cooling heat source system, 3 ... Cooling equipment, 4 ... Heat exchanger, 5 ... Circulating water injection tank, 6 ... Melting tank, 7 ... Heat exchange tank, 8 ... Snow ice, 9 ... Overflow weir 10 ... Overflow weir, 14 ... Fence member

Claims (9)

Circulating water is stored, and snow and ice are introduced into the stored circulating water and the circulating water is cooled by melting the snow and ice, and is installed at a stage subsequent to the melting tank, and the circulating water and A heat exchange tank provided with a heat exchanger for exchanging heat with the refrigerant of the cooling facility,
Between the melting tank and the heat exchange tank is provided an overflow weir configured so that the circulating water of the melting tank that has reached a predetermined water level flows out to the heat exchange tank side ,
Circulating water that has flowed into the melting tank flows in the horizontal direction on the surface layer of the melting tank, proceeds to the downstream side while melting the snow and ice to obtain cold water, and partly overflows from the overflow weir and the heat exchange A snow and ice cooling heat source system, wherein a water flow in the melting tank flowing out into the tank is formed . A circulating water injection tank into which the circulating water is injected is provided in the front stage of the melting tank,
2. An overflow weir is provided between the circulating water injection tank and the melting tank so that the circulating water of the circulating water injection tank reaching a predetermined water level flows out to the melting tank side. The snow and ice cold heat source system described.   The snow and ice cold heat source system according to claim 2, wherein each of the overflow weirs is provided over substantially the entire width of the circulating water injection tank, the melting tank, and the heat exchange tank. Circulating water is stored, and snow and ice are introduced into the stored circulating water and the circulating water is cooled by melting the snow and ice, and is installed at a stage subsequent to the melting tank, and the circulating water and Including a heat exchange tank in which a heat exchanger for exchanging heat with a refrigerant in a cooling facility is provided, and a circulating water injection tank provided in the previous stage of the melting tank to which the circulating water is injected,
An overflow weir is provided between the melting tank and the heat exchange tank so that the circulating water of the melting tank that has reached a predetermined water level flows out to the heat exchange tank side, and the circulating water injection tank And an overflow weir configured so that the circulating water of the circulating water injection tank that has reached a predetermined water level flows out to the melting tank side,
The head of the circulating water overflowing the overflow weir between the melting tank and the heat exchange tank is the circulating water overflowing the overflow weir between the circulating water injection tank and the melting tank. Snow and ice cold heat source system characterized by being set larger than the head. Circulating water is stored, and snow and ice are introduced into the stored circulating water and the circulating water is cooled by melting the snow and ice, and is installed at a stage subsequent to the melting tank, and the circulating water and A heat exchange tank provided with a heat exchanger for exchanging heat with the refrigerant of the cooling facility,
Between the melting tank and the heat exchange tank is provided an overflow weir configured so that the circulating water of the melting tank that has reached a predetermined water level flows out to the heat exchange tank side,
A pipe for pouring the circulating water is disposed in the melting tank,
The pipe includes a vertical pipe lowered to the upper surface of the melting tank, and a plurality of openings or slits extending horizontally from the lower end of the vertical pipe and allowing the circulating water to flow out in the horizontal direction on the pipe peripheral surface. A snow and ice cold heat source system characterized by comprising a horizontal tube formed. Circulating water is stored, and snow and ice are introduced into the stored circulating water and the circulating water is cooled by melting the snow and ice, and is installed at a stage subsequent to the melting tank, and the circulating water and A heat exchange tank provided with a heat exchanger for exchanging heat with the refrigerant of the cooling facility,
Between the melting tank and the heat exchange tank is provided an overflow weir configured so that the circulating water of the melting tank that has reached a predetermined water level flows out to the heat exchange tank side,
Snow and ice cold heat source system, characterized in that depth of the heat exchange chamber is set smaller than the depth of the molten bath. Circulating water is stored, and snow and ice are introduced into the stored circulating water and the circulating water is cooled by melting the snow and ice, and is installed at a stage subsequent to the melting tank, and the circulating water and A heat exchange tank provided with a heat exchanger for exchanging heat with the refrigerant of the cooling facility,
Between the melting tank and the heat exchange tank is provided an overflow weir configured so that the circulating water of the melting tank that has reached a predetermined water level flows out to the heat exchange tank side,
The snow / ice cold heat source system is characterized in that the water depth of the melting tank is set to a depth at which the introduced snow ice floats in the water. Circulating water is stored, and snow and ice are introduced into the stored circulating water and the circulating water is cooled by melting the snow and ice, and is installed at a stage subsequent to the melting tank, and the circulating water and A heat exchange tank provided with a heat exchanger for exchanging heat with the refrigerant of the cooling facility,
Between the melting tank and the heat exchange tank is provided an overflow weir configured so that the circulating water of the melting tank that has reached a predetermined water level flows out to the heat exchange tank side,
In the molten bath, and characterized in that it is turned snow ice is so as not to contact the overflow weir downstream, the fence member spaced from the downstream side of the overflow weir prevents the entry of snow and ice is provided snow and ice cold heat source system.   A cooling system comprising the snow and ice cooling heat source system according to any one of claims 1 to 8 as a cooling heat source.

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