JP6279906B2 - Snow energy supply system - Google Patents

Description

  The present invention relates to a system for supplying snow stored in winter to other systems as cold heat in summer.

  2. Description of the Related Art Conventionally, there is a system in which winter snow is stored in a snow compartment and the snow stored in the snow compartment is used as a cooling source for cooling or the like. For example, an area for storing snowmelt water obtained by melting snow stored in a snow compartment is provided, and heat exchange is performed between the stored snowmelt water and a heat medium circulating through the air conditioner. Systems have been proposed for cooling a heat medium that has been heated and used for cooling (for example, Patent Documents 1 and 2).

JP 2011-247548 A JP 2005-299944 A

  In the above-described system, in a region such as a heat storage tank for storing snowmelt water, low-temperature snowmelt water that has just been melted and a certain amount of time has passed since being stored, or as cold heat in the above-described air conditioner or the like. Since it is mixed with snowmelt water (returned water) that has been used or heated up, the cold heat of snow cannot be used effectively.

  In view of such circumstances, an object of the present invention is to provide a technique for supplying cold snow so that it can be effectively used in other systems.

  The present invention employs the following means in order to solve the above-described problems. That is, the present invention relates to a snow melting water tank in which a snow chamber for storing snow and a snow melting water formed by melting the snow in the snow chamber flows in from an inlet provided between the snow chamber and the snow melting water. And a heat exchanger for exchanging heat of the snowmelt water in the snowmelt water tank with a cooling heat medium of a cold heat utilization system, and a flow path for supplying the snowmelt water in the snowmelt water tank to the heat exchanger. A cold water outbound path, a snowmelt water supply path that is a flow path for supplying the snowmelt water that has passed through the heat exchanger to the snow in the snow compartment, and the heat exchanger. A tank return path that is a flow path for returning the melted snow water to the snow melt water tank, and the cold water forward path has a suction port at a position close to the inlet in the snow melt water tank. It is a flow path for sending snow melt water stored in a place to the heat exchanger, and the snow melt water flowing through the return path in the tank is Flowing into the distant position from the position of the cold water forward of the suction opening in the snow melting water tank, a Yukirui energy supply system. Note that snow refers to products below freezing generated by natural weather including not only snow but also icicles, for example.

  According to the present invention, the snowmelt water stored in the vicinity of the inlet into which the snowmelt water flows from the snow chamber in the snowmelt water tank is supplied to the heat exchanger for exchanging heat with the heat medium of the cold energy utilization system, The snowmelt after the cold heat is used in the utilization system is returned to the return water area or supplied to the snow in the snow compartment. As a result, the heat exchanger is configured to be supplied with low-temperature snowmelt water without being supplied with the snowmelt water that has been heated by using the cold heat, so that the cooler heat is given priority over more effective cold heat. It can be supplied to the utilization system.

  Further, in the snow energy supply system according to the present invention, the snow melting water tank is divided into a low-temperature water region and a return water region by providing a partition therein, and the partition is only from the communication port provided at one end of the partition. Water flow between the low-temperature water area and the return water area is enabled, the cold water forward path has a suction port at a position away from the communication port of the low-temperature water area, and the return path in the tank is the return line You may have a discharge port in the position away from the said communication port of the water area | region.

  Further, the snow energy supply system according to the present invention allows the snowmelt water after passing through the heat exchanger to pass through the tank return path and the snowmelt water supply path. A snowmelt water flow path switching device that switches to a supply state; and a snowmelt water temperature sensor that detects a temperature of the snowmelt water stored in the snowmelt water tank, and the snowmelt water flow path switching device includes the snowmelt water temperature sensor. When the temperature of the snowmelt water is detected to be equal to or higher than a predetermined temperature, the supply state may be controlled.

  According to the present invention as described above, when the water temperature in the snowmelt water tank is equal to or higher than a predetermined value, the snowmelt water heated by the heat exchanger is supplied to the snow in the snow chamber and brought into contact with the snow. At the same time, the snow is melted to further generate snowmelt water and flow into the snowmelt water tank, so that the water temperature in the snowmelt water tank can be lowered to contribute to the supply of effective cold heat to the cold energy utilization system.

  Further, in the snow energy supply system according to the present invention, the cold energy utilization system is an air conditioning system having a heat source device that circulates in the system using cold water for air conditioning as the cooling medium and cools the cold water for air conditioning. A heat exchanger circulation state in which the air conditioning cold water is circulated by passing the air conditioning cold water through the heat exchanger, and the air conditioning cold water is passed to the heat source device. A cooling water flow path switching device for air conditioning that switches to a circulating state of the heat source machine to be circulated, and the snow energy supply system further includes a cold water temperature sensor that detects a temperature of melted snow water in the cold water outbound path, The cold water flow path switching means may be controlled to enter a heat source machine circulation state when it is detected that the temperature of the snowmelt water in the cold water forward path is equal to or higher than a predetermined value.

  According to the present invention, if the snow energy supply system can supply sufficient cold heat to the air conditioning system, the cold energy of the snow energy supply system, that is, the cold heat of snowmelt water is supplied to the air conditioning system. If not, the heat source device is controlled so that the cold heat is supplied, so the cold air can be supplied to the air conditioning system more efficiently.

  Further, the present invention uses snow melt water melted and flowing into the snow melting water tank stored in the snow chamber for heat exchange with the cooling heat medium of the cold heat utilization system, and the snow melting after the heat exchange. Water is supplied to the snow in the snow chamber or returned to the snow melting water tank, and the snow melting water returned to the snow melting water tank after the heat exchange with the cooling heat medium of the cold energy utilization system is performed in the snow chamber. Priority is given to the melted water that has melted and flowed into the snowmelt water tank, and is used for heat exchange with the cooling heat medium of the cold heat utilization system, and the temperature of the snowmelt water stored in the snowmelt water tank is equal to or higher than a predetermined temperature. In this case, a snow energy supply method may be used in which the melted water after heat exchange is supplied to the snow in the snow compartment.

  According to the present invention, it is possible to preferentially supply the cold heat of the snowmelt water to the cold energy utilization system, so that the cold energy can be effectively utilized in the cold energy utilization system.

FIG. 1 is a configuration diagram illustrating a snow energy supply system 1 according to an embodiment. FIG. 2 is a plan view illustrating the internal configuration of the snow chamber 10.

  Hereinafter, embodiments of the present invention (hereinafter also referred to as “present embodiments”) will be described with reference to the drawings. The embodiment described below shows an example for carrying out the present invention, and the present invention is not limited to a specific configuration described below. In practicing the present invention, it is preferable to adopt a specific configuration according to the embodiment as appropriate.

  The snow energy supply system 1 according to the present embodiment stores the snowmelt water formed by melting the snow S in the snow chamber 10 in the snowmelt water tank 12, and the snowmelt water in the snowmelt water tank 12 is used as a heat medium for a cold heat utilization system. The system is described as a system in which heat exchange is performed to cool the heat medium, and the snowmelt water after the heat exchange is returned to the snowmelt water tank 12 or supplied into the snow chamber 10. Moreover, the cold energy utilization system which concerns on this embodiment is demonstrated as the air conditioning system 3 which circulates cold water (secondary cold water) as a cooling heat medium. Note that the cold energy utilization system may be equipment for applications other than air conditioning that has a demand for cold energy. Further, the snow S may contain products below freezing point due to natural weather such as icicles, and corresponds to “snows” in the invention, and the snow energy system 1 corresponds to “snowy energy system” in the invention.

  FIG. 1 is a configuration diagram illustrating a snow energy supply system according to this embodiment. FIG. 1 shows a snow energy supply system 1 and an air conditioning system 3. Between the snow energy supply system 1 and the air conditioning system 3, a water channel for drawing secondary cold water as a cooling heat medium for the air conditioning system 3 from the air conditioning system 3 to the snow energy supply system 1 and returning it to the air conditioning system 3. (Secondary cold water outgoing path 34, secondary cold water return path 33) are provided. In addition, it is preferable that each water channel employ | adopts the structure of using a material with high heat retention property, or coat | covering with a heat retention material. Hereinafter, the details of the configuration will be described in the order of the air conditioning system 3 and the snow energy supply system 1.

  The air conditioning system 3 is a water-cooled air conditioning facility. The air conditioning system 3 includes an air conditioner 32 as a cold load. The air conditioner is here an air handling unit, but may be a water heat source heat pump unit. The air-conditioning system 3 is provided with a secondary chilled water return path 33 and a secondary chilled water return path 34 as secondary chilled water circulation paths. The secondary chilled water return path 33 has a valve V31 and a secondary chilled water return path 34. Each is provided with a valve V32. A heat source side return path 36 is provided between the valve V31 of the secondary chilled water return path 33 and the air conditioner 32, and a heat source machine forward path 37 is provided between the valve V32 of the secondary chilled water outward path 34 and the air conditioner 32. Each is connected, and all are connected to a heat source machine (not shown). The heat source unit side return path 36 is provided with a valve V33, and the heat source unit side outward path 37 is provided with a valve V34. The heat source device is a device that lowers the inflowing secondary cold water to a predetermined temperature, for example, a turbo refrigerator. Note that there are a plurality of air conditioners 3 in the secondary chilled water channel, and when viewed from the air conditioner 3 side, the secondary chilled water return channel 33 travels and the secondary chilled water outbound channel 34 returns.

  When the valves V31 and V32 are open and the valves V33 and V34 are closed, the secondary cold water flows through the air conditioner 32 and the heat exchanger 13 of the snow energy supply system 1 by the operation of the secondary cold water pump P31. To do. The air conditioner 32 exchanges heat between the supplied secondary chilled water and the indoor air, and the heated secondary chilled water after the heat exchange is returned to the heat exchanger 13. On the other hand, when the valve V31 and the valve V32 are closed and the valve V33 and the valve V34 are open, the secondary cold water is generated by the operation of a pump (not shown) provided in the heat source unit return path 36 or the heat source unit side forward path 37. The air conditioner 32 and the heat source machine are passed through, and the secondary cold water heated by the heat exchange between the secondary cold water and the indoor air in the heat exchanger in the air conditioner 32 is returned to the heat source machine.

  A temperature sensor 56 that detects the temperature of the cold water flowing through the secondary chilled water outbound path 34 is provided in the secondary chilled water outbound path 34, and a temperature sensor 55 that detects the temperature of the chilled water flowing through the secondary chilled water return path 33 in the secondary chilled water return path 33. Are installed, and information on each temperature is transmitted to the control unit via a signal line.

  The snow energy supply system 1 is a system that supplies the snow melt water of the snow S accumulated in the snow chamber 10 as cold heat to the air conditioning system 3 described above, that is, another system such as a cold heat utilization system. The snow energy supply system 1 includes a snow chamber 10, a snowmelt water tank 12, and a heat exchanger 13.

  The snow chamber 10 is a chamber in which snow accumulated in the winter can be stored and stored in the snow state until the summer, and is formed in a substantially rectangular shape. A water spray nozzle 17b as a melt water supply means for melting the snow S in the snow chamber 10 is installed at a lower portion on one end side in the snow chamber 10 and is passed through the air conditioning system 3 by the heat exchanger 13. The snowmelt water heated and exchanged with the secondary cold water is sprayed (sprayed) into the snow chamber 10 from the water spray nozzle 17b through the cold water return path 16, the snowmelt water supply path 17, and the header 17a. The path 16 is branched into a tank return path 18 and a snowmelt water supply path 17 which will be described later). The snowmelt water supply path 17 is connected to a header 17a disposed along a corner formed by the side wall 10a and the floor surface 10b on the opposite side of the snow chamber 10 from the side where the snowmelt water tank 12 is installed. A plurality of watering nozzles 17b are provided at predetermined intervals over the entire length of the header 17a, and the water sprayed from the watering nozzles 17b melts the snow S accumulated in the snow chamber 10 and melts the floor surface into a snow melting water tank. It flows toward 12. Moreover, it is good also as a structure which installs the header 17a in the upper part in the snow chamber 10, and sprays water from the upper direction of the accumulated snow S (water discharge).

  The snow melting water tank 12 is provided under the floor on one side end side of the snow chamber 10, and the snow S in the snow chamber 10 is melted through the inlet 11 provided in a part of the floor above the snow melting water tank 12. The snowmelt water flows into the snowmelt water tank 12 and is stored. The inflow port 11 may be formed of a perforated plate such as a grating plate or a punching plate. This prevents a person from falling into the snow melting water tank 12 and suppresses entry of dust or the like into the snow melting water tank 12. It is aimed. In addition, a metal mesh may be attached to the inflow port 11 and a part of the snow S may be placed thereon so that the snow S does not remain solid but melts and then flows down to the snow melting water tank 12. . In addition, you may provide the downward slope toward the inflow port 11 in the floor surface of the snow chamber 10 so that snowmelt water may flow into the snowmelt water tank 12 easily. Further, when the accumulation position of the snow S and the snow melting water tank 12 are separated from each other, it is conceivable that water is sent from the former to the latter via the intermediate storage tank. The supply port becomes the “inlet”.

  The snow melting water tank 12 is divided into two regions, a low temperature water region 12a and a return water region 12b. A low-temperature water region 12a is disposed below the above-described inflow port 11, and the snow melt melted in the snow chamber 10 flows down to the low-temperature water region 12a side. In the embodiment, the side closer to the snow chamber 10 is disposed as the low temperature water region 12a, and the side far from the snow chamber 10 is disposed as the return water region 12b. However, if the inlet 11 is above the low temperature water region 12a, the arrangement of the low temperature water region 12a and the return water region 12b may be reversed. A partition wall 28 is provided between the low temperature water region 12a and the return water region 12b. Here, the partition wall 28 is erected vertically from the bottom surface of the tank at a middle position of the snowmelt water tank 12 so that both areas have an equal volume. The water can be circulated between the two regions only from the communication passage 29 provided at one end of the partition wall 28 far from the inlet 11. In addition, when the operation of the snow energy supply system 1 is started for the first time in summer or the like, normally, the snow melt water that has been melted so far is already stored in the snow melt water tank 12. Therefore, driving can be started immediately. However, when the snowmelt water is not stored in the snowmelt water tank 12, the operation may be started after supplying water from the outside to the snow S of the snow chamber 10 to forcibly generate the snowmelt water. .

  As described above, the inflow port 11 is provided above the low-temperature water region 12a, and snow melt water that has just been melted flows into the low-temperature water region 12a in sequence, so that the low-temperature water region 12a is in the return water region 12b. Snowmelt water at a lower temperature (for example, 2 ° C. or lower) is stored. On the other hand, the return water region 12b is in a state where the snowmelt water that has accumulated and has been heated after melting has been stored. In particular, the water temperature near the lower part of the inlet 11 is the lowest, and the water temperature at the end of the return water region 12b on the side away from the communication port 29 is the highest.

  In the low-temperature water region 12a, a suction port 15a of the cold-water outward route 15 is provided, and the operation of the cold-water pump P11 installed in the cold-water forward route 15 with one end immersed in the low-temperature water region 12a causes Snowmelt water is pumped up and sent to the heat exchanger through the cold water outbound path 15. A suction port 19a of the drainage channel 19 is provided in the return water region 12b, and when the drainage pump P12 installed in the drainage channel 19 is operated by detecting a sign of overflow by a water level sensor 58 described later, the return water region The snowmelt water in 12b is pumped up and discharged out of the system. More specifically, the suction port 15a of the cold water outgoing path 15 is the side away from the communication port 29 of the low temperature water region 12a (the side close to the inlet 11), and the suction port 19a of the drainage channel 19 is the communication port of the return water region 12b. Is provided on the far side. In other words, when the inside of the snowmelt water tank 12 is viewed as a series of channels from the low temperature water region 12a to the return water region 12b through the communication port 29, the suction port 15a and the suction port 19a are most separated on the channel. It can be said that it is arranged. Then, the water is sucked from the suction port 15a by the cold water pump P11 and returned to the underwater discharge port 18a, and the water flow in the snow melting water tank 12 forms a U-shape through a partition wall from the discharge port 18a to the discharge port 15a. By doing so, low-temperature water effective as cold heat is supplied to the cold water forward path 15. Further, when the water in the snowmelt water tank 12 is drained out of the system, this low temperature water is not drained.

  A temperature sensor 52 is installed in the snow melting water tank 12, the temperature of the snow melting water in the snow melting water tank 12 is detected, and the information of the temperature sensor 52 is sent to a control unit (all not shown) via a signal line. . More specifically, the temperature sensor 52 is installed in the vicinity of the communication passage 29 in the snowmelt water tank 12, that is, in an intermediate region between the low temperature water region 12a and the return water region 12b. Further, a water level sensor 58 for detecting the water level of the snow melt water stored in the snow melt water tank 12 is installed in the snow melt water tank 12, and information on the water level is sent to the control unit via a signal line.

  In addition, in the bottom surface of the snowmelt water tank 12, in order to more reliably suck water from the suction port 19a of the drainage channel 19 and the suction port 15a of the cold water forward channel 15, the kettle is placed at a position where the suction ports 19a and 15a are disposed. The bottom surface called a field may have a further recessed shape, and the suction ports 19a and 15a may be arranged in that portion.

  The other side of the cold water outbound path 15 is connected to a heat exchanger 13. In addition, a secondary chilled water outward path 34, a secondary chilled water return path 33, and a chilled water return path 16 are connected to the heat exchanger 13. The snowmelt water from the cold water outgoing path 15 and the secondary cold water from the secondary cold water return path 33 are heat-exchanged by the heat exchanger 13, and the snowmelt water after the heat exchange is sent to the cold water return path 16, and the secondary cold water is the secondary cold water. Water is sent to the outgoing path 34 respectively. A bypass path 20 is connected between the cold water forward path 15 and the cold water return path 16.

  A temperature sensor 53 is installed in the cold water outbound path 15 to detect the temperature of the snowmelt water flowing through the cold water outbound path 15. Information on the temperature of the melted water detected by the temperature sensor 53 is sent to a control unit (both not shown) via a signal line. A temperature sensor 54 is installed in the cold water return path 16 to detect the temperature of the snowmelt water flowing through the cold water return path 16. Information on the temperature of the melted snow detected by the temperature sensor 54 is sent to the control unit via a signal line.

  The cold water return path 16 is branched into a tank return path 18 and the above-described snowmelt water supply path 17. The tank return path 18 is connected to the snow melting water tank 12, and the discharge port 18 a is disposed on the side away from the communication port 29 on the return water region 12 b side in the snow melting water tank 12. In other words, when the snow melting water tank 12 is viewed as a series of flow paths from the low temperature water area 12a to the return water area 12b through the communication port 29, the discharge port 18a is farthest from the suction port 15a on the flow path. It is arranged at the position. Thereby, the water heated through the heat exchanger 13 is prevented from being sent as it is from the suction port 15a to the cold water forward path 15. The snow melting water supply path 17 is connected to the snow chamber 10 as described above, and the water fed to the snow melting water supply path 17 is sprinkled into the snow chamber 10 from the water spray nozzle 17b via the header 17a. A valve V11 and a valve V12 are provided in the snow melting water supply path 17 and the tank return path 18, respectively, and the opening degree is controlled according to a command from the control unit.

  Next, a method for controlling the above-described system will be described. The chilled water pump P11 is controlled to operate while the air conditioner 32 is in the cooling operation (cold heat utilization operation) in the air conditioning system 3, and is stopped otherwise. That is, during the cooling operation of the air conditioner 32, the snow melt water in the snow melt water tank 12 is supplied to the heat exchanger 13, and the secondary chilled water heated by the heat exchange with the indoor air in the air conditioner 32 is lowered.

  The drainage pump P12 is activated when the water level in the snowmelt water tank 12 rises and is detected by the water level sensor 58 to be higher than a predetermined value on the high side, and the water in the snowmelt water tank 12 is discharged from the drain port 19a through the drainage channel 19. To drain outside the system. When the water level falls and the water level sensor 58 detects that the water level is lower than the predetermined level on the lower side, the drainage pump P12 stops. Thereby, the water level in the snowmelt water tank 12 is maintained within a predetermined range. Further, without providing the water level sensor 58, the drainage pump P12 may be constituted by a pump attached with a float switch, thereby controlling the water level.

  When the temperature detected by the temperature sensor 52 installed in the snowmelt water tank 12 is equal to or higher than a predetermined temperature (for example, 5 ° C.), the valve V11 of the snowmelt water supply path 17 is opened and the valve V12 of the tank return path 18 is opened. Is closed, and the snowmelt water flowing through the cold water return passage 16 is fed to the snowmelt water supply passage 17 so as to be sprinkled into the snow chamber 10 from the watering nozzle 17b. On the other hand, when the temperature is lower than the predetermined temperature, the valve V11 of the snowmelt water supply path 17 is closed, the valve 12 of the tank return path 18 is opened, and the snowmelt water flowing through the cold water return path 16 is sent to the tank return path 18. Then, the water is returned to the water return region 12b side of the snow melting water tank 12. That is, when the water temperature in the snowmelt water tank 12 exceeds a predetermined value, the temperature of the snowmelt water in the heat exchanger 13 is lowered by bringing it into contact with the snow, and the snow S in the snow chamber 10 is melted and the temperature is lowered. Control is performed so that the snowmelt water and the newly melted snowmelt water flow into the snowmelt water tank 12 from the inlet 11 and into the snowmelt water tank 12 from the inlet 11 to lower the water temperature in the snowmelt water tank 12. The state in which the valve V11 is opened and the valve V12 is closed corresponds to the supply state in the invention, and the state in which the valve V11 is closed and the valve V12 is opened corresponds to the tank return state in the invention.

  The valve V14 of the chilled water outbound path 15 and the valve V13 of the bypass path 20 are the secondary chilled water pump P31 of the secondary chilled water outbound path 34, the temperature sensor 56 of the secondary chilled water outbound path 34, and the temperature sensor 55 of the secondary chilled water return path 33. The degree of opening is controlled and the amount of water supplied is controlled so that the detected temperatures become predetermined temperatures (for example, 12 ° C. and 7 ° C.), respectively, and the amounts of snowmelt water and secondary cold water passing through the heat exchanger 13 are adjusted. .

  If the valve V31, the valve V32, the valve V33, and the valve V34 (corresponding to the cold water flow switching device for air conditioning of the invention) can supply sufficient cold heat to the air conditioning system 3 by the snow energy supply system 1, they supply snow energy. The cold heat of the system 1 is supplied to the air conditioning system 3, and if not, the open / close control is performed so that the cold heat is supplied by the heat source unit. Specifically, if the temperature detected by the temperature sensor 53 (that is, the temperature of melted snow flowing through the chilled water outward path 15) is lower than a predetermined temperature (for example, 5 ° C.), sufficient cold heat is supplied to the air conditioning system 3 by the snow energy supply system 1. If possible, the valve V31 and the valve V32 are opened, the valve V33 and the valve V34 are closed, and the secondary cold water is circulated between the air conditioner 32 and the heat exchanger 13. On the other hand, if the temperature is equal to or higher than the predetermined temperature, the valve V31 and the valve V32 are closed, the valve V33 and the valve V34 are opened, and the secondary chilled water air conditioner 32 and the heat source device are circulated. The state in which the valve V31 and the valve V32 are opened and the valve V33 and the valve V34 are closed corresponds to the heat exchanger circulation state in the invention. The valve V31 and the valve V32 are closed, and the valve V33 and the valve V34 are closed. The opened state corresponds to the heat source machine circulation state in the invention.

  According to the present embodiment described above, the snowmelt water on the low temperature water region 12a side into which the snowmelt water melted in the snow chamber 10 flows is supplied to the heat exchanger 13 for exchanging heat with the heat medium of the cold energy utilization system. The snowmelt water after the use of the cold heat in the cold heat utilization system is returned to the return water region 12b or sprayed into the snow S in the snow chamber 10. Thus, the heat exchanger 13 is configured to be supplied with low-temperature snowmelt water without being supplied with the temperature-increased snowmelt water after the temperature is raised by using cold heat, so that more effective cold heat is generated. Priority is supplied to the cold energy utilization system.

  Further, when the water temperature in the snowmelt water tank 12 is equal to or higher than a predetermined value, the temperature is lowered by spraying the snowmelt water heated by the heat exchanger 13 onto the snow S in the snow chamber 10 and bringing it into contact with the snow S. At the same time, the snow S is melted to further generate snowmelt water and flow into the snowmelt water tank 12, so that the water temperature in the snowmelt water tank 12 can be lowered to contribute to the supply of effective cold heat in the cold energy utilization system. Furthermore, when the snowmelt water in the snowmelt water tank 12 is drained out of the system, the snowmelt water that has been heated by the heat exchanger 13 is drained, so that the lower temperature snowmelt water that is effective as cold heat is drained. Can be suppressed.

1 Snow energy supply system (snow energy supply system)
DESCRIPTION OF SYMBOLS 10 Snow chamber 11 Inlet 12 Snow melting water tank 12a Low temperature water area | region 12b Return water area 13 Heat exchanger 15 Chilled water outward path P11 Chilled water pump 16 Chilled water return path 17 Snowmelt water supply path 17a Header 17b Water spray nozzle 18 Intra tank return path 19 Drainage path P12 Drainage pump 20 Bypass 3 Air-conditioning system (cold heat utilization system)
32 Air conditioner 33 Secondary chilled water return path 34 Secondary chilled water return path P31 Secondary chilled water pump 36 Heat source machine side return path 37 Heat source machine side return path V11, V12, V13, V14, V31, V32, V33, V34 Valve

Claims (5)

A snow chamber for storing snow,
A snowmelt water tank in which snowmelt water formed by melting the snow in the snow chamber flows in from an inlet provided between the snow chamber and stored;
A heat exchanger for exchanging heat between the snowmelt water in the snowmelt water tank and a cooling heat medium of a cold energy utilization system;
A cold water forward path which is a flow path for sending the snow melt water in the snow melt water tank to the heat exchanger;
A snowmelt water supply path, which is a flow path for supplying water into the snow compartment in order to supply the snowmelt water after passing through the heat exchanger to the snow in the snow compartment;
A tank return path that is a flow path for returning the snowmelt water after passing through the heat exchanger into the snowmelt water tank;
The cold water outbound path has a suction port in the snow melting water tank and is a flow path for sending snow melting water stored in the location to the heat exchanger,
Meltwater that passed through the tank return passage flows into the snow melting water tank,
The distance between the position where snowmelt water flows into the snowmelt water tank via the inlet and the suction port of the cold water outbound path is the position where the snowmelt water flows into the snowmelt water tank via the inlet and the tank The snowmelt water flowing through the inner return path is shorter than the distance from the position flowing into the snowmelt water tank ,
Snow energy supply system. The snowmelt water tank is separated into a low temperature water region and a return water region by providing a partition inside.
The partition wall allows water flow between the low-temperature water region and the return water region only from a communication port provided at one end of the partition wall.
The cold water outbound path has a suction port at a position away from the communication port in the low temperature water region,
The return path in the tank has a discharge port at a position away from the communication port in the return water region.
The snow energy supply system according to claim 1. The snow energy supply system includes:
A snowmelt water flow path switching device that switches between a state of returning the melted snow after passing through the heat exchanger to the return state in the tank and a supply state in which the water is supplied to the snowmelt water supply path,
A snowmelt water temperature sensor for detecting the temperature of the snowmelt water stored in the snowmelt water tank;
Further comprising
The snowmelt water flow switching device is controlled to be in a supply state when the snowmelt water temperature sensor detects that the temperature of the snowmelt water is equal to or higher than a predetermined temperature.
The snow energy supply system according to claim 1 or 2. The cold energy utilization system is an air conditioning system having a heat source device for circulating air conditioning cold water as the cooling medium and cooling the air conditioning cold water,
A heat exchanger circulation state in which the air conditioning cold water is circulated through the heat exchanger through a flow path through which the air conditioning cold water flows, and the air conditioning cold water is circulated through the heat source device. With a heat source machine circulation state, and equipped with a cold water flow path switching device for air conditioning,
The snow energy supply system further includes a cold water temperature sensor for detecting a temperature of melted snow water in the cold water outbound path,
The air-conditioning cold water flow switching device is controlled to be in a heat source machine circulation state when it is detected that the temperature of the snowmelt water in the cold water outgoing path is equal to or higher than a predetermined value.
The snowy energy supply system according to any one of claims 1 to 3. The snow melt in the snow chamber melts and flows into the snow melting water tank and is stored for heat exchange with the cooling heat medium of the cold energy utilization system.
Supply the snowmelt water after the heat exchange to the snow in the snow chamber, or return it to the snowmelt water tank,
Prior to the snowmelt water returned into the snowmelt water tank after the heat exchange with the cooling heat medium of the cold energy utilization system, the snowmelt water that has melted in the snow chamber and flowed into the snowmelt water tank has priority. Used for heat exchange with the cooling heat medium,
When the temperature of the snowmelt water stored in the snowmelt water tank is equal to or higher than a predetermined temperature, the snowmelt water after heat exchange is supplied to the snow in the snow compartment.
Snow energy supply method.

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