JP6482017B2 - Heat exchange structure and heat utilization method - Google Patents

Description

  The present invention relates to a heat exchange structure and a heat utilization method for utilizing the heat of water flowing in a substantially full state in a pipe line laid in the ground.

  Examples of pipes that are laid in the ground and in which water always flows in a substantially full state include water supply pipes, industrial water pipes, and agricultural water pipes. The temperature of the water flowing inside these pipes does not fluctuate greatly throughout the four seasons and maintains a substantially constant value. For example, the temperature of water flowing through a pipe for waterworks is lower than the outside air temperature in summer and higher than the outside air temperature in winter. For this reason, it can be considered that a new energy source is obtained by performing heat exchange using a temperature difference with water flowing inside the pipe.

  For example, the invention described in Patent Document 1 relates to a sewage heat collection facility and a sewage heat utilization system. In the present invention, the heat collecting equipment is arranged in a jacket shape covering at least the upper part of the outer periphery of the sewer pipe, and this heat collecting equipment comprises a heat collecting pipe formed of a high thermal conductivity material through which the heat source water flows. , And a protective material filled in and around the gap of the heat collection tube. Further, the heat collecting pipe is constituted by a plurality of straight pipes arranged in parallel to the longitudinal direction of the sewer pipe and a vent pipe connecting the straight pipes.

  In the heat collecting equipment configured as described above, the heat collecting pipe is disposed on the outer periphery of the sewer pipe. For this reason, there is an effect that the heat collecting pipe does not directly contact the sewage, maintenance is unnecessary, and the maintenance cost can be reduced. In addition, when installing in an existing sewer pipe, it is sufficient to install a heat collecting pipe on the outer periphery of the sewer pipe opened by excavating the surrounding ground and to fill a predetermined part with a protective material. It also has the effect of being easy.

JP 2008-241226 A

  The invention described in Patent Document 1 has the characteristics as described above. However, the sewer is generally composed of a concrete pipe or a ceramic pipe, and under normal conditions, the sewage does not flow in the pipe in a substantially full state. For this reason, if heat of sewage is acquired through such a pipe, there is a possibility that heat of sewage cannot be used efficiently.

  An object of the present invention is to provide a structure capable of exchanging heat of water flowing in a pipe in a substantially full state, and a heat utilization method.

  In order to solve the above problems, a heat exchange structure according to the present invention is a heat exchange structure for utilizing the heat of water flowing in a substantially full state in a pipe laid in the ground, and the water is exchanged in a substantially full state. A heat exchanging member disposed over the entire circumference in a predetermined length range on the outer peripheral surface of the pipe through which the gas flows, and a pump for circulating a heat exchanging medium through the heat exchanging member.

  In the heat exchange structure, it is preferable that a heat insulating material is disposed between the heat exchange member and the ground.

In particular, the conduit is a pipe branched from the pipe laid in the ground, the tubes constituting the tube path, Ru steel or cast iron pipe der.

  In any one of the heat exchange structures described above, it is preferable that the heat exchange member is a pipe spirally wound around an outer periphery of the pipe line.

  Further, in any one of the heat exchange structures, the heat exchange member has an outer tube fitted on an outer periphery of the pipe line, and an end portion of the outer pipe and an outer peripheral surface of the pipe line It is preferable that a connection member with the pump is disposed at both ends or in the vicinity of both ends while shielding the gap.

  In the heat exchange structure, it is preferable that the outer tube is made of a material having low thermal conductivity.

  In any of the above heat exchange structures, a flow-inhibiting member for disturbing the flow of the heat exchange medium is disposed inside the outer tube, or the heat exchange medium is made to flow spirally. It is preferable that a spiral partition member is disposed.

Further, the heat utilization method according to the present invention is a method for utilizing the heat of water flowing in a substantially full water state in a pipeline laid in the ground, from a sewer pipeline laid in the ground. by branching the steel or conduits made of cast iron pipes and pipe flows water at substantially filled with water, a heat exchange member placed over entire circumference in a predetermined length range on the outer peripheral surface of the pipe, the heat exchanger A heat exchange medium energized by a pump is circulated through the member, and heat exchange with the heat exchange medium that has passed through the heat exchange member is performed by a heat exchange device.

  In the heat exchange structure according to the present invention, the heat of water flowing inside the pipe line can be efficiently exchanged. That is, since the water flows in the pipe in a substantially full state, the contact area between the pipe wall and the water is increased, so that efficient heat exchange is performed between the water and the pipe wall. And since the heat exchange member is arrange | positioned in the perimeter of the outer peripheral surface of a pipe line, heat exchange with a pipe wall can be performed efficiently.

  In particular, since the heat insulating material is disposed between the heat exchange member and the ground, efficient heat exchange can be performed without being affected by the ground or groundwater.

In particular, if already設管path is sewerage line, always branches the conduit that can safely sewage substantially filled with water from the mains, stable thermal By the branched pipeline steel pipes or cast iron pipes Exchanges can be made.

  In addition, when the heat exchange member disposed on the outer periphery of the pipe is a pipe spirally wound around the outer circumference of the pipe, a heat exchange medium is allowed to flow through the pipe, so that the pipe wall of the pipe and Heat exchange can be performed through the tube wall of the tube.

  Further, the heat exchange member disposed on the outer periphery of the pipe line shields the gap between the both ends of the outer pipe fitted on the outer periphery of the pipe and the outer peripheral surface of the pipe and Since the connection member with the pump is arranged and configured, the heat exchange medium supplied from the pump can be distributed without leaking from the heat exchange member. In particular, when the outer pipe is formed of a material having low thermal conductivity, heat exchange with water can be performed through the pipe wall without being affected by groundwater existing around the pipe line. .

  Furthermore, since the flow-inhibiting member for disturbing the flow of the heat exchange medium is disposed inside the outer tube, the flow of the heat exchange medium flowing through the outer tube is disturbed. For this reason, the heat exchange medium in contact with the pipe line is always changed during the distribution process, and heat exchange can be promoted to perform more efficient heat exchange.

  Further, in the case where a spiral partition member for flowing the heat exchange medium in a spiral manner is disposed inside the outer tube, the heat exchange medium can be spirally circulated along the outer peripheral surface of the pipe line. . For this reason, it becomes possible to extend the contact length with respect to the pipe line of a heat exchange medium, and efficient heat exchange can be performed.

  In particular, by configuring the flow-inhibiting member or the helical partition member integrally with the outer tube, the rigidity of the outer tube can be increased or the strength can be increased. For this reason, it is possible to reduce the thickness of the outer tube or to use a material having low strength.

  In the heat utilization method according to the present invention, a heat exchange member is arranged over the entire circumference on the outer peripheral surface of a pipeline through which water flows in a substantially full state, and a heat exchange medium energized by a pump is circulated through the heat exchange member and heat By performing heat exchange with the heat exchange medium that has passed through the heat exchange member by the exchange device, it is possible to efficiently use the heat of water flowing through the pipeline.

It is a figure explaining the heat utilization method while explaining the example of the relationship between a pipe line and a heat exchange member . It is a figure explaining the other example of the relationship between a pipe line and a heat exchange member . It is a figure explaining the other example of the relationship between a pipe line and a heat exchange member . It is a figure explaining the other example of the relationship between a pipe line and a heat exchange member . It is a figure explaining the Example of this invention .

  Hereinafter, the heat exchange structure and heat utilization method according to the present invention will be described.

The a pipeline laid in the ground line flowing water substantially filled with water, the conduit for water supply, conduit for agricultural water, various conduit there, including a conduit for industrial water The Temperature of the water flowing through these conduits is to availability and can vary greatly throughout the year.

In addition, when applied to a sewer pipe that normally does not flow in the pipe in a substantially full state, the branch pipe is branched from the main pipe so that the inside of the branch pipe flows in a substantially full state . .

  Since the water flows through the inside of the pipe line in a substantially full state, the water is in contact with the inner peripheral surface of the pipe line over almost the entire circumference, and heat transfer between the flowing water and the pipe line is performed efficiently. . For this reason, the temperature of the outer peripheral surface of a pipe line becomes a temperature corresponding to the conditions including the thermal conductivity of the pipe line and the thickness of the pipe wall, and does not vary greatly depending on the temperature of the flowing water.

As described above, the temperature of the outer peripheral surface of the pipe does not fluctuate greatly . However, the conduit by configuring the large steel pipes or cast iron pipes of thermal conductivity, Ru can der performing thermal exchange with the water flow more effectively.

  The heat exchange member circulates a heat exchange medium therein to exchange heat with the pipe line. The length when the heat exchange member is arranged in the longitudinal direction of the pipe line is not particularly limited, and the outer diameter of the pipe line, the material constituting the pipe line, the temperature of the water flowing through the pipe line, the flow rate, the heat exchange medium It is preferable to set according to conditions such as the material, the flow rate, and the presumed exchange heat amount.

  Further, the shape of the heat exchange member is not particularly limited, and for example, a long tube such as a cylindrical tube, a square tube, or a kamaboko tube can be used. Further, as the heat exchange member, a cylindrical outer tube fitted on the outer periphery of the pipe line may be used, and a heat exchange medium may be circulated inside the outer pipe to perform heat exchange with the pipe line. Is possible.

  The material of the heat exchange member that distributes the heat exchange medium is not limited. That is, it is possible to use a metal tube such as a steel tube, an aluminum tube or a copper tube as the heat exchange member, or a metal cylinder such as steel, stainless steel, aluminum or copper as the outer tube. is there. When metal pipes or cylinders are used as heat exchange members, they can conduct heat efficiently, so not only the heat of water flowing through the pipeline, but also the heat in the ground, especially the heat of groundwater. Can be used. In particular, when a metal pipe is used as the heat exchange member, it is easy to obtain a strength that can withstand earth pressure or groundwater pressure.

  Synthetic resin does not conduct heat efficiently and functions as a heat insulating material. For this reason, when a synthetic resin pipe is used as the outer pipe constituting the heat exchange member, the heat exchange medium flowing inside the pipe flows without being affected by the heat in the ground or the groundwater. It is possible to use only the heat of water. In particular, when a synthetic resin pipe is used as the outer pipe constituting the heat exchange member, the heat exchange member is divided into a plurality of parts, or a flow blocking member or a spiral partition member is provided inside. Is advantageous.

  As described above, select whether to use water flowing through the pipeline as the heat source, or to use the ground or groundwater as the heat source in addition to the water flowing through the pipeline, depending on the shape, structure and material of the heat exchange member. Is possible. For this reason, it is preferable to determine the shape, structure, and material of the heat exchange member in consideration of the difference between the temperature of water flowing through the target pipe line and the temperature of the ground or groundwater.

For example, the water flowing through the pipe for sewerage is not significantly different from the temperature of the ground and groundwater, and as a heat exchange member, a structure in which a metal pipe is wound, and a structure in which the outer pipe is constituted by a metal cylinder. Ru can der be adopted.

  A heat insulating material is disposed between the heat exchange member and the ground. As this heat insulating material, for example, asbestos can be used. For example, in the case of a heat exchange member composed of a long tube, after the tube is wound around a pipe line, a heat insulating material may be disposed outside the tube, and the same applies to a heat exchange member having an outer tube. After the outer pipe is fitted into the pipe, a heat insulating material may be disposed outside the pipe. Further, the heat insulating material is not necessarily a material having a thickness. For example, the heat insulating material may be applied to the outer peripheral surface of the outer tube or may be subjected to a surface treatment such as plating.

  Moreover, when employ | adopting the metal which may produce rust as a heat exchange member, it is preferable to give surface treatments, such as plating and coating, and to carry out a rust prevention process.

  The heat exchange member is used while being fixed to the pipe line, but the structure for fixing the heat exchange member to the pipe line is not limited, and is appropriately determined according to conditions such as the material of the pipe line and the material of the heat exchange member. It is preferable to select. For example, when the heat exchange member is configured by winding a long metal pipe around a pipe, a special fixing means may not be required.

  When the heat exchange member has an outer tube and the outer tube and the pipe are made of steel, both can be fixed by welding or bonding. Also, if the outer tube is a thin cylinder of steel, stainless steel, aluminum, copper, or synthetic resin, and is very flexible, bosses are formed at both ends of the outer tube. It is preferable to fix the boss by tightening the boss to the pipeline using a flexible belt.

  The heat exchange medium that circulates through the heat exchange member is not particularly limited, and smooth heat exchange can be performed through the tube wall of the pipe constituting the heat exchange member or through the tube wall of the pipe line. If it is good. As such a heat exchange medium, water can be used, and in consideration of freezing in winter, a so-called antifreeze liquid in which water or alcohol or ethylene glycol is mixed is preferable.

Next, an example of the relationship between the pipe line and the heat exchange member will be described with reference to FIG. 1, and a heat utilization method will be described together.

In the figure, the water 2 flows in the direction of arrow a substantially full level the inner portion conduit 1 laid in the ground. The pipe line 1 is constructed by arranging a plurality of cast iron pipes in series and connecting them by bolting flanges and laying in the ground.

  A heat exchange member A is disposed over the entire circumference of a predetermined length range on the outer peripheral surface of the pipe 1. The heat exchange member A includes an outer tube 11 having an inner diameter larger than the outer diameter of the pipe 1 and ring-shaped end plates 11a and 11b fixed to both ends of the outer tube 11, respectively. It is configured. The outer tube 11 circulates a heat exchange medium through a space 20 formed between the outer tube 11 and exchanges heat between the outer tube 11 and the end plates 11a and 11b. The gap (space 20) between the peripheral surface and the outer peripheral surface of the pipe line 1 is shielded.

  The outer tube 11 has a length substantially equal to the length of the heat exchange member A set in advance. Further, the inner diameter of the outer tube 11 is set according to conditions such as a flow rate and a flow rate of the heat exchange medium assumed in advance. For example, when the outer diameter of the pipe line 1 is 150 mm to 450 mm, the inner diameter of the outer pipe 11 is preferably 200 mm to 600 mm. That is, it is preferable that the height of the space 20 formed between the outer peripheral surface of the pipe line 1 and the inner peripheral surface of the outer tube 11 is about 25 mm to 75 mm.

  Accordingly, the end plates 11a and 11b are formed as rings having dimensions of an outer diameter of 200 mm to 600 mm and an inner diameter of 150 mm to 450 mm.

  The structure of the outer tube 11 and the end plates 11a and 11b constituting the heat exchange member A is not particularly limited. However, considering the ease of construction for installing the heat exchange member A in the pipe line 1, the outer tube 11 and the end plates 11a and 11b are integrated in advance and then divided into two in the radial direction along the longitudinal direction. It is preferable to divide and assemble the divided pieces using bolts and nuts.

  When the outer tube 11 is constructed by assembling a plurality of divided pieces as described above, it is natural that the packing is disposed at the connection portion between the divided pieces to stop the water. Moreover, when installing the outer pipe | tube 11 in the pipe line 1, it is also natural to arrange a packing also between each end plate 11a, 11b and the outer peripheral surface of the pipe line 1, and to stop water.

  The material of the outer pipe 11 is not particularly limited, and a steel pipe or a synthetic resin pipe can be used. When the outer tube 11 is formed of a steel pipe, the end plates 11a and 11b are also made of steel plates, and both need to be welded.

  Further, when the outer tube 11 is constituted by a synthetic resin tube, the outer tube 11 itself functions as a heat insulating material. In this case, the end plates 11a and 11b are also configured as synthetic resin plates, and it is necessary to weld these end plates 11a and 11b to the outer tube 11. In particular, when the outer tube 11 is configured as a divided piece that is divided into a plurality of pieces in the radial direction, it is preferable that the outer tube 11 and the end plates 11a and 11b are integrated, for example, by injection molding.

  Elbow-shaped connection members 12a and 12b are attached to the end plates 11a and 11b, respectively, and pipes 13a and 13b through which a heat exchange medium flows are connected to the connection members 12a and 12b, respectively. The pipe 13 a is a pipe for supplying a heat exchange medium, and is connected to a pump 14 and is connected to the heat pump 15 through the pump 14. The pipe 13b is a pipe for discharging the heat exchange medium, and is directly connected to the heat pump 15.

  The heat pump 15 is connected to a heat exchange medium and a device that uses the heat of water transferred through the pipe 1, for example, an indoor unit 16.

  When the pump 14 is driven to supply the heat exchange medium from the pipe 13a to the heat exchange member A configured as described above, the supplied heat exchange medium circulates with the space 20 full of water, Heat exchange is performed in contact with the outer peripheral surface of the path 1. The heat exchange medium flows from the space 20 into the heat pump 15 through the pipe 13b, and the heat pump 15 can exchange heat. Furthermore, the indoor unit 16 connected to the heat pump 15 can be operated by the heat transferred by the heat pump 15.

  As described above, it is possible to utilize the heat of the water 2 flowing in the pipe line 1 in a substantially full state by transmitting it to the heat pump 15 through the heat exchange medium.

For example, the temperature of the water 2 flowing through the pipe 1 is Ri 20 ° C. to 25 ° C. of about der, to space 20 of the outer tube 11 constituting a heat exchanging member A, is supplied to the heat exchange medium from the piping 13a, heat Heat exchange is performed via the pipe line 1 in the process in which the exchange medium flows through the space 20. In particular, heat exchange is performed so that the heat exchange medium supplied from the pipe 13a has a temperature of about 30 ° C. to 35 ° C., and the temperature when discharged to the pipe 13b is about 25 ° C. to 30 ° C. The length of the member A, the flow rate of the heat exchange medium, the flow velocity, etc. are set. As a result, heat is transmitted from the heat exchange medium to the water 2 flowing through the pipe line 1, and the heat exchange action of the heat exchange medium is executed.

The temperature is 15 ° C. ~ 18 ° C. of about der that put the winter is, with respect to the space 20 of the outer tube 11, is supplied to the heat exchange medium from the piping 13a, a tube in the process of heat exchange medium flows through the space 20 Heat exchange takes place via path 1. In particular, heat exchange is performed so that the temperature of the heat exchange medium supplied from the pipe 13a is about 3 ° C. to 9 ° C., and the temperature when discharged to the pipe 13b is about 8 ° C. to 15 ° C. The length of the member A, the flow rate of the heat exchange medium, the flow velocity, etc. are set. As a result, the heat exchange medium receives heat from the water 2 flowing through the pipe line 1 and the heat absorption action of the heat exchange medium is executed.

  In the heat exchange structure configured as described above, the heat of the water 2 flowing through the pipe line 1 can be used when the indoor unit 16 connected via the heat pump 15 is cooled or heated.

Next, another example of the relationship between the pipe line and the heat exchange member will be described with reference to FIG. In the figure, the same reference numerals are given to the same portions or portions having the same functions as those of the above-described embodiments, and the description thereof will be omitted ( other examples of the relationship between the pipe line and the heat exchange member below). And so on) In the figure, the pipes 13a and 13b are connected to the heat pump 15 via the pump 14 as in FIG. 1 (the same applies to other examples of the relationship between the pipe line and the heat exchange member below).

  In the figure, the heat exchanging member A is constituted by a pipe 21 wound around the outer peripheral surface of the pipe 1, and pipes 13 a and 13 b are connected to the pipe 21 so that a heat exchanging medium can be circulated. It is configured as follows. The shape of the tube 21 constituting the heat exchange member A is not particularly limited, and a tube such as a cylindrical tube, a rectangular tube, or a kamaboko tube can be used. In particular, in order to efficiently exchange heat with the pipe line 1, it is preferable to use a rectangular tube that can have a large contact area with the outer peripheral surface of the pipe line 1.

  Although the material of the pipe | tube 21 which comprises the heat exchange member A is not limited, It is preferable that it is a material which can transmit heat | fever efficiently and can perform the operation | work at the time of winding around the pipe line 1 easily. . Examples of such materials include steel, stainless steel, copper, and aluminum, and any of them can be preferably used. However, when the heat exchange member A made of steel is used, it is preferable to perform a sufficient rust prevention treatment.

Even in the heat exchange structure according to the present embodiment, in the process in which the heat exchange medium supplied from the pipe 13a to the pipe 21 flows toward the pipe 13b, it is exchanged with the water 2 via the pipe line 1 and the pipe 21. It is possible to exchange heat between them. And it is possible to drive the indoor unit 16 connected via the heat pump 15 similarly to the example of the relationship between the pipe line and the heat exchange member described above.

Next, a heat exchange structure according to another example of the relationship between the pipe line and the heat exchange member will be described with reference to FIG. The heat exchanging member A in this embodiment is an application of the heat exchanging member A in the above-described example of the relationship between the pipe line and the heat exchanging member, and in the space 20 of the heat exchanging member A. By uniformly disturbing the flow of the heat exchange medium, the pipe 1 is uniformly contacted, thereby promoting heat exchange.

  In the heat exchange member A according to the present embodiment, a plurality of flow inhibition members 22 are arranged on the inner peripheral surface of the outer tube 11. The flow inhibition member 22 is supplied to the space 20 from the pipe 13a and is used for colliding a heat exchange medium flowing through the space 20 to disturb the flow. The heat exchange medium in which the flow is disturbed is always exchanged with the heat exchange medium in contact with the pipe 1, whereby heat exchange is promoted, and efficient heat exchange can be realized.

In the present embodiment, the heat exchange member A according to the example of the relationship between the pipe line and the heat exchange member is formed only by the outer tube 11, and the heat exchange medium supplied from the pipe 13a is directed to the pipe 13b. Therefore, the problem that there is a possibility that efficient heat exchange cannot be performed through the shortest distance is solved.

  The flow inhibiting member 22 may be formed by providing a ring-shaped plate between the outer peripheral surface of the pipe line 1 and fixing it to the inner peripheral surface of the outer tube 11. In this case, the space 20 formed by the inner peripheral surface of the outer tube 11 and the outer peripheral surface of the pipe 1 is formed as a continuous space along the outer peripheral surface of the pipe 1, but the inner periphery of the outer tube 11. The surface side is formed as a non-continuous space.

  Further, the flow inhibiting member 22 may be formed by fixing a battledore-like plate to the inner peripheral surface of the outer tube 11. The tip of the battledore plate may be brought into contact with the outer peripheral surface of the pipe line 1 or may be provided with a gap. As described above, when the flow inhibition member 22 is formed of a battledore plate, the space 20 is formed as a space partitioned in a zigzag manner by the flow inhibition member 22.

  In the heat exchanging member A configured as described above, the heat exchanging medium supplied to the space 20 from the pipe 13a collides with the flow blocking member 22 and the flow is disturbed. The heat exchange medium in contact with is always replaced. As a result, the heat exchange medium uniformly contacts the pipe line 1 to promote heat exchange, and it becomes possible to realize more efficient heat exchange.

  In particular, since the flow-inhibiting member 22 is integrally formed on the inner peripheral surface side of the outer pipe 11, the rigidity of the outer pipe 11 is improved, and resistance to earth pressure and groundwater pressure, which are external pressures, can be improved. It is.

  In the figure, 11c is a boss formed on the end plates 11a and 11b, the inner diameter is substantially equal to the outer diameter of the pipe line 1, and 11d is a fastening band for fastening the boss 11c to the pipe line 1. . The configuration of the tightening band 11d is not particularly limited, and a tightening structure employing a ratchet mechanism, a tightening structure employing a screw mechanism, or the like can be used.

Even in the heat exchange structure according to the present embodiment, the flow is disturbed in the process in which the heat exchange medium supplied from the pipe 13a flows into the space 20 of the heat exchange member A toward the pipe 13b. It is possible to exchange heat with water 2 via And it is possible to drive the indoor unit 16 connected via the heat pump 15 similarly to the example of the relationship between the pipe line and the heat exchange member described above.

Next, a heat exchange structure according to another example of the relationship between the pipe line and the heat exchange member will be described with reference to FIG. The heat exchanging member A in this embodiment is an application of the heat exchanging member A in the example of the relationship between the pipe line and the heat exchanging member, and is supplied to the space 20 of the heat exchanging member A. The contact length is increased by circulating the heat exchange medium spirally, thereby improving the efficiency of heat exchange.

  In the heat exchange member A according to the present embodiment, a spiral partition member 23 is disposed on the inner peripheral surface of the outer tube 11. The partition member 23 is fixed to the inner peripheral surface of the outer tube 11, and has an inner diameter (diameter penetrating the spiral inner periphery in the axial direction) slightly larger than the outer diameter of the pipe line 1. . Accordingly, a spiral flow passage is formed in the space 20 by the partition member 23.

  In the heat exchange member A configured as described above, the heat exchange medium supplied from the pipe 13 a to the space 20 becomes a spiral flow that goes around the outer periphery of the pipe line 1 along the partition member 23. As a result, the heat exchange medium has a large contact length with respect to the pipe line 1 and can perform good heat exchange.

  In particular, since the partition member 23 is integrally formed on the inner peripheral surface of the outer pipe 11, the rigidity of the outer pipe 11 is improved, and resistance to earth pressure and groundwater pressure, which are external pressures, can be improved.

Even in the heat exchange structure according to the present embodiment, the flow becomes spiral in the process of flowing the heat exchange medium supplied from the pipe 13a toward the pipe 13b into the space 20 of the heat exchange member A. It is possible to exchange heat with the water 2 via the pipe line 1. And it is possible to drive the indoor unit 16 connected via the heat pump 15 similarly to the example of the relationship between the pipe line and the heat exchange member described above.

Next, the case where the heat exchange structure which is an Example of this invention is applied to a sewer will be described with reference to FIG. As shown in the figure, a manhole 32 is provided in the sewer line 31. Normally, sewage does not flow in the sewer pipe 31 in a full state, but flows with a slight depth at the bottom of the pipe.

An outflow branch 31a is disposed at a predetermined position of the sewer pipe 31, and a weir 33 is formed on the downstream side of the outflow branch 31a. In addition, an inflow branch 31b is disposed at a position separated from the outflow branch 31a by a distance sufficiently larger than the length of the heat exchange member A on the downstream side of the outflow branch 31a. And the outflow branch 31a and the inflow branch 31b which were arrange | positioned in the sewer pipe line 31 are connected, the pipe line 1 is arrange | positioned, and the heat exchange member A is comprised by this pipe line 1. FIG. The heat exchange member A may be any of the above-described examples of the relationship between the pipe line and the heat exchange member .

  The positional relationship in the depth direction between the sewer pipe 31 and the pipe 1 (the relation between the water level of the sewage flowing through the sewer pipe 31 and the water level of the water 2 flowing through the pipe 1) is as follows. It is laid deep.

  Further, the weir 33 is formed so as to stand in the center direction from the bottom of the sewer pipe 31, and when the sewage flowing into the sewer pipe 31 increases during heavy rain, the sewer is rotated and related to the presence of the weir 33. The cross-sectional area of the pipe 31 is configured so as not to be reduced as much as possible. The rotating structure of the weir 33 is not particularly limited, and the vertical axis or the horizontal axis may be passed in the diameter direction of the sewer pipe 31, and the weir 33 may be rotatably mounted on this axis.

  In the present embodiment, a horizontal axis is provided in the sewer pipe line 31, and a weir 33 is attached to the axis via a biasing member such as a coil spring, thereby changing the water level in the sewer pipe line 31. The weir 33 does not reduce the cross-sectional area of the sewer pipe line 31 by rotating around the horizontal axis.

  For this reason, the water 2 flowing through the sewer pipe 31 is blocked by the weir 33 and introduced into the pipe 1 from the outflow branch 31 a and flows through the pipe 1. And the water 2 which flowed through the pipe line 1 flows into the sewer pipe line 31 from the inflow branch 31b, and flows downstream. At this time, the inside of the pipe line 1 is substantially filled with the water 2, and the flow continues due to the differential pressure corresponding to the height of the weir 33 generated between the outflow branch 31a and the inflow branch 31b.

Therefore, by supplying the heat exchange medium to the heat exchange member A, the heat exchange medium can exchange heat with the water 2 through the pipe line 1. And it is possible to drive the indoor unit 16 connected via the heat pump 15 similarly to the example of the relationship between the pipe line and the heat exchange member described above.

  The heat exchange structure according to the present invention can be used as long as it is a pipe line that flows in a substantially full state, and heat can be utilized.

A Heat exchange member 1 Pipe 2 Water 11 Outer tube 11a, 11b End plate 11c Boss 11d Tightening band 12a, 12b Connection member 13a, 13b Pipe 14 Pump 15 Heat pump 16 Indoor unit 20 Space 21 Pipe 22 Distribution inhibition member 23 Partition member 31 Sewer pipe 31a Outflow branch 31b Inflow branch 32 Manhole 33 Weir

Claims (8)

A heat exchange structure for utilizing the heat of water flowing in a substantially full state in a pipeline laid in the ground,
A heat exchange member disposed over the entire circumference in a predetermined length range in the outer peripheral surface of the pipe through which water flows in a substantially full state consisting of a steel pipe or a cast iron pipe branched from a pipe laid in the ground ;
A pump for circulating a heat exchange medium through the heat exchange member;
The heat exchange structure characterized by having.   The heat exchange structure according to claim 1, wherein a heat insulating material is disposed between the heat exchange member and the ground.   The heat exchange structure according to claim 1 or 2, wherein the heat exchange member is a pipe spirally wound around an outer periphery of the pipe line.   The heat exchange member has an outer tube fitted on the outer periphery of the pipe, shields a gap between both ends of the outer pipe and the outer peripheral surface of the pipe, and closes both ends or both ends. The heat exchange structure according to any one of claims 1 to 3, wherein a connection member with the pump is disposed.   The heat exchange structure according to claim 4, wherein the outer tube is made of a material having low thermal conductivity.   The heat exchange structure according to claim 4 or 5, wherein a flow inhibiting member for disturbing a flow of a heat exchange medium is disposed inside the outer tube. 6. The heat exchange structure according to claim 4, wherein a spiral partition member for flowing a heat exchange medium in a spiral shape is disposed inside the outer tube. A method for utilizing the heat of water flowing in a substantially full state in a pipeline laid in the ground,
Branches the conduit consisting of steel or cast iron pipe from the pipe laid in the ground as a conduit flowing water substantially filled with water, heat over entire circumference in a predetermined length range on the outer peripheral surface of the pipe A heat exchanger characterized by disposing an exchange member, causing the heat exchange medium energized by a pump to flow through the heat exchange member, and performing heat exchange with the heat exchange medium that has passed through the heat exchange member by a heat exchange device. How to Use.

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