WO2005008161A1 - 熱サイホン装置、それを用いた冷却、加温装置及びその方法ならびに植物の栽培方法 - Google Patents
熱サイホン装置、それを用いた冷却、加温装置及びその方法ならびに植物の栽培方法 Download PDFInfo
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- WO2005008161A1 WO2005008161A1 PCT/JP2004/010313 JP2004010313W WO2005008161A1 WO 2005008161 A1 WO2005008161 A1 WO 2005008161A1 JP 2004010313 W JP2004010313 W JP 2004010313W WO 2005008161 A1 WO2005008161 A1 WO 2005008161A1
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- pipe
- wall surface
- tube
- inner pipe
- heat
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/04—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with tubes having a capillary structure
- F28D15/046—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with tubes having a capillary structure characterised by the material or the construction of the capillary structure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/0226—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with an intermediate heat-transfer medium, e.g. thermosiphon radiators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/0233—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes the conduits having a particular shape, e.g. non-circular cross-section, annular
Definitions
- the present invention relates to a thermal siphon, and more particularly, to a double-pipe type thermal siphon apparatus which is used by penetrating an inner pipe for flowing heat source fluid in an outer pipe, and is used for either cooling or heating (heating).
- the present invention also relates to a multifunctional thermosyphon device that can be used, cooling using it, a warming device and method thereof, and a method of cultivating plants.
- thermosyphon For a heat conversion device such as a heat pump whose heat exchange efficiency decreases as the temperature difference between heat exchange fluids decreases, a large amount of heat is transported with a small temperature difference using evaporation and condensation phase change.
- Thermosyphons that can be used are being put to practical use in recent years.
- a thermal siphon can be regarded as one form of a heat pipe in principle, and has excellent heat transfer characteristics and temperature uniformity of the heat pipe.
- Japanese Utility Model 62- 1367 7 7 No. of double tube type heat pipe (thermosyphon) is disclosed.
- one of the inner peripheral surface of the inner pipe and the outer peripheral surface of the outer pipe of the double pipe configuration is a heat receiving surface
- the other peripheral surface is a heat radiating surface.
- a heat medium which is vaporized by heat reception and which radiates heat to the heat dissipation surface by condensation is accommodated in a sealed space formed between the inner pipe and the outer pipe, whereby the heat transfer area of the heat receiving portion and the heat discharging portion is It is intended to reduce the size of the system and improve the heat transfer efficiency.
- Patent Document 1 Japanese Utility Model Application Publication No. 62-136777 (claim for utility model registration, Fig. 1) Disclosure of the invention
- the present invention has been made in view of the above-described conventional problems, and one object of the present invention is to simplify the installation work with an extremely simple configuration, eliminate the need for adjustment work, and reduce the manufacturing cost.
- Thermosyphon device which can reduce the heat transfer efficiency as well as realize cooling and heating of the surroundings, cooling using the same, heating device and its method, and plant cultivation method It is to provide.
- another object of the present invention is a thermo-silicon apparatus capable of performing ambient cooling or heating at a practical level by changing a heat source fluid while being one apparatus, a cooling / heating apparatus using the same, and a method thereof And to provide methods for cultivating plants.
- Another object of the present invention is to provide a thermosiphon device excellent in peripheral cooling or heating function as compared with a conventional thermosiphon, a cooling using it, a heating device and its method, and a method of cultivating plants. It is to provide.
- an inner pipe 14 is disposed longitudinally penetrating in a horizontally arranged outer pipe 12 and an operation between the outer pipe 12 and the inner pipe 14 is performed. It is a double-tube type thermal siphon that encloses and seals the working fluid Q in the space S, and allows heat exchange with the outside of the outer tube while flowing the heat source fluid U inside the inner tube 14.
- a thermal siphon apparatus comprising: an outer tube that cools or heats while being evaporated in one part and condensed on the other wall surface.
- the thermal siphon device of the present invention is a double-piped thermal siphon device disposed horizontally long, and is capillary force of a large number of narrow concave grooves in the circumferential direction of the outer tube wall surface and the outer tube outer wall surface facing the closed operation space. Raise the hydraulic fluid, and directly contact any tube wall that receives heat to evaporate the hydraulic fluid.
- the surface tension and capillary force of the working fluid for groove width, groove cross-sectional shape, pitch width interval, spiral continuous or one loop complete groove, continuous in the longitudinal direction of the tube or intermittent, etc. It may be set arbitrarily as long as it holds the function that can be raised in the circumferential direction via.
- As the hydraulic fluid water, ammonia, etc. may be used besides alcohol.
- the thermal siphon apparatus of the present invention can be applied as cooling from the lower floor part of a house or a building, heating, heat exchange with another fluid or gas, and various other cooling / heating (heating) apparatuses.
- the narrow groove may be a groove having a groove width Wg shown in a predetermined relational expression as a maximum allowable groove width and having a predetermined groove depth Hg at that time. .
- the inner pipe 14 is an eccentric double pipe in which the axial center CS is disposed at a position eccentric from the axial center CL of the outer pipe 12, and the inner pipe 14 has its axial center CS being an outer pipe. It is better to place it at a position below the center of gravity CL.
- the surrounding heat source can be cooled or heated with one device by switching the heat source fluid u to cold energy or heat energy. It consists of cooling and heating equipment.
- the inner pipe 14 is disposed by penetrating the inside of the horizontally arranged outer pipe 12 in the longitudinal direction, and the working fluid Q is introduced into the working space S between the outer pipe and the inner pipe.
- a double-pipe thermal siphon that is sealed and sealed and exchanges heat with the outside of the outer pipe while flowing heat source fluid U inside the inner pipe 14, and is a part of the outer pipe 12 facing the working space S.
- a large number of narrow grooves G circumferentially engraved on either the inner wall surface 121 or the outer wall surface 141 of the inner pipe 14 are provided, and the operating fluid Q is formed by capillary force via the narrow groove G.
- a thermal siphon apparatus 101, 102 characterized in that it evaporates in either the evaporation section of the wall surface 121 or the outer wall surface 141 of the inner pipe and cools or heats the outer area of the outer pipe while condensing on the other wall surface. Be done.
- the inner pipe is disposed longitudinally penetrating the outer pipe disposed laterally long, and the working fluid is sealed and sealed in the working space between the outer pipe and the inner pipe,
- a double-tube type thermal siphon that exchanges heat with the outside of the outer tube while letting the heat source flow inside the inner tube, and the inner wall surface of the outer tube facing the working space and the outer wall surface of the inner tube
- a large number of narrow concave grooves engraved in the circumferential direction are formed on both sides, and the hydraulic fluid is always carried on the pipe surface through the narrow concave grooves, and the vertical movement guide of the hydraulic fluid along each pipe surface
- the method comprises a cooling and heating method using a thermosiphon characterized in performing cooling or heating of the outer tube outside area corresponding to the heat source fluid through performing the heat treatment.
- the present invention comprises a plant cultivation method which is carried out by embedding the thermosyphon device according to any one of claims 1 to 4 in a plant cultivation soil.
- the inner pipe is disposed longitudinally through the horizontally arranged outer pipe, and the working fluid is sealed in the working space between the outer pipe and the inner pipe.
- a dual-tube thermal siphon that exchanges heat with the outside of the outer tube while letting the heat source fluid flow inside the inner tube, the inner wall surface of the outer tube facing the working space and the inner tube
- On each of the outer wall surfaces there are provided a large number of narrow recessed grooves which are engraved in the circumferential direction, and the working fluid is raised in the circumferential direction of the wall surface by the capillary force through the narrow recessed grooves.
- the mesh wick is formed on the inside of the tube by configuring the narrow groove to be a groove having a predetermined groove width Wg as the allowable maximum groove width and a predetermined groove depth Hg.
- the inner pipe is an eccentric double pipe whose axis is disposed at a position eccentric to the axis of the outer pipe, and the inner pipe has its axis centered on the axis of the outer pipe.
- the working fluid is efficiently evaporated from the narrow groove on the outer wall surface of the inner pipe, and condensed on the entire outer wall surface including the groove and other parts in the condensation process. Therefore, heat transfer efficiency is improved.
- thermosiphon device is used as a refrigerator, and a heat source fluid is switched to heat or cold, thereby cooling or heating the surroundings with one device.
- a heating device by using a heating device, it can be installed in various parts where cooling and heating of the surroundings are required, and switching between cooling and heating can be realized effectively.
- the inner pipe is disposed longitudinally penetrating the horizontally arranged outer pipe, and the working fluid is sealed in the working space between the outer pipe and the inner pipe for sealing.
- a double-pipe thermal siphon that exchanges heat with the outer area of the outer pipe while flowing heat source fluid into the inner pipe, the inner wall surface of the outer pipe facing the working space and the outer wall surface of the inner pipe.
- the inner wall surface or the inner surface of the outer tube is provided while a large number of narrow recessed grooves cut in the circumferential direction are provided for any of the above and the hydraulic fluid is raised in the circumferential direction of the wall surface by capillary force via the narrow recessed grooves.
- thermosiphon device Since the thermosiphon device is characterized in that it evaporates in any evaporation section of the outer wall of the tube and condenses on the other wall while cooling or heating the outer region of the outer tube, the outer tube Even if it is a double-pipe thermosiphon in which narrow grooves are provided only on either the inner wall surface or the outer wall surface of the inner pipe, Retirement, performed effectively their cooling or heating as needed for heating.
- the inner pipe is disposed longitudinally penetrating the outer pipe disposed in a horizontally long manner, and the working fluid is sealed in the working space between the outer pipe and the inner pipe to seal it.
- a double-tube type thermal siphon that exchanges heat with the outside of the outer tube while letting the heat source flow inside the inner tube, and the inner wall surface of the outer tube facing the working space and the outer wall surface of the inner tube
- a large number of narrow concave grooves engraved in the circumferential direction are formed on both sides, and the hydraulic fluid is always carried on the pipe surface through the narrow concave grooves, and the vertical movement guide of the hydraulic fluid along each pipe surface
- the cooling and heating method using a thermal siphon is characterized by performing cooling or heating of the outer tube outside area corresponding to the heat source fluid through the heat treatment. For practical use It is possible to realize cooling and heating around the device that can be used in a simple configuration. In addition, it is possible to freely select either ambient cooling or heating by simply changing the heat source fluid supplied into the inner pipe.
- the present invention comprises a method of cultivating a plant by carrying the thermosiphon device according to claim 1 into a plant cultivation soil, growth promotion of the cultivated plant can be realized. At the same time, expensive crops such as highland vegetables can be grown, especially in flatlands or any area.
- FIG. 1 is a partially omitted longitudinal sectional view of a thermal siphon apparatus according to a first embodiment of the present invention.
- FIG. 2 (a), (b) and (c) are enlarged explanatory views of main parts showing various aspects of the grooved configuration of the narrow groove.
- FIG. 3 (a), (b), (c) and (d) are diagrams showing various cross-sectional examples of the narrow groove.
- Fig. 4 is a configuration explanatory view of the thermal siphon device of the first embodiment and at the time of cooling.
- FIG. 5 is a configuration explanatory view of the thermal siphon device of the first embodiment and also at the same time heating.
- FIG. 6 A partially omitted explanatory view of a connection example of the thermal siphon devices of FIG.
- FIG. 7 is a partially cutaway perspective view of the case where heating under the floor and installation of a cooling device are performed using the thermal siphon device of FIG. 1.
- FIG. 8 is a cross-sectional view of a thermal siphon apparatus according to a second embodiment of the present invention.
- FIG. 9 is a cross-sectional explanatory view of a thermal siphon apparatus according to a third embodiment of the present invention.
- thermal siphon apparatus the working space between the inner and outer double tubes is filled with the working fluid and sealed, the heat transfer area of the outer tube is widely secured, and the surrounding through the heat or cold fluid passing through the inner tube.
- a step of closely attaching to the inner wall surface of the tube, such as a mesh wick, is unnecessary in this embodiment, and good heat transfer through the tube is eliminated. It is a thermal siphon system that can cool and heat the outside of the tube.
- FIG. 1 shows a longitudinal cross section of a thermal siphon device according to a first embodiment of the present invention, in which the thermal siphon device 10 comprises an outer tube 12 arranged laterally long and an outer tube 12 An inner pipe 14 disposed longitudinally through the pipe and an intermediate portion between the outer pipe 12 and the inner pipe 14 is an operation space S, and the operation space is sealed to enclose the working fluid Q enclosed therein. And a narrow groove group 16, 17 having a plurality of narrow grooves G circumferentially engraved on the inner wall surface 121 of the outer tube 12 and the outer wall surface 141 of the inner tube 14.
- the outer tube 12 is formed of a horizontally long hollow cylindrical shape and made of a material of aluminum, and an inner tube 14 of the same material as the outer tube penetrates the outer tube 12 in the longitudinal direction in parallel with the outer tube 12. Are arranged.
- the inner pipe 14 is disposed at a position slightly downward from the center inside the outer pipe. When the working space S between the outer pipe 12 and the inner pipe 14 is filled with the working fluid Q, both ends are closed by the end wall 18 such as a cap and the inside is sealed in a watertight manner. As shown in FIGS.
- the hydraulic fluid Q is filled to such an extent that a part of the inner pipe 14 is infiltrated, that is, half or less of the inner pipe is infiltrated.
- the inner pipe 14 is an eccentric double pipe whose axial center CS is arranged at a position eccentric to the axial center CL of the outer pipe 12 and the inner pipe 14 is its axial center CS Is disposed below the axial center CL of the outer pipe 12.
- the heat source fluid U is supplied to the inner pipe 14 to heat the outer region of the outer pipe 12 In this case, the heat source fluid is passed, and the cold heat source fluid is supplied when the outer region is cooled.
- the working fluid Q filled in the working space S is a working fluid that carries out a phase change heat transfer without phase change between the evaporation part and the condensation part of the closed space, and for example, in the embodiment, alcohol is introduced to .
- one characteristic feature is that a large number of narrow grooves G are circumferentially formed on both the inner wall surface 121 of the outer pipe 12 facing the working space S and the outer wall surface 141 of the inner pipe 14.
- the efficiency of evaporation of the working fluid Q and thus the efficiency of heat transport are improved.
- the apparatus 10 having a horizontally long cylindrical configuration is used to effectively add surrounding air while utilizing gravity action. Switch the temperature and cooling freely.
- FIG. 2 is an enlarged view of a part of the inner wall surface 121 of the outer tube 12 or the outer wall surface 141 of the inner tube 14, and in the present embodiment, as shown in FIG.
- a narrow continuous groove G is formed on the inner wall surface 121 of the outer pipe 12 and the outer wall surface 141 of the inner pipe 14 at a predetermined pitch width in the longitudinal direction thereof.
- these narrow recessed grooves G are formed long in the circumferential direction of both the outer pipe and the inner pipe formed in the transverse direction.
- a large number of narrow grooves G formed on the inner wall surface of the outer pipe and a large number of narrow grooves G formed on the outer wall surface of the inner pipe are the first and second narrow groove groups 16, 17 respectively.
- the narrow groove G raises the working fluid Q filled in the working space S along the groove G by capillary force, and the working fluid film is distributed substantially uniformly in a uniform distribution over the entire surface of the tube wall. In the present embodiment, this is realized by covering the entire surface of the tube with a minute hydraulic fluid muscle.
- the groove width Wg and the groove depth Hg of the narrow groove G are set to the width and depth where the hydraulic fluid Q can rise the surface of the pipe through capillary action, and when each specification is constant, It is better to be narrow.
- the groove width is 0.2 mm and the groove depth is 0.2 mm with respect to the inner diameter of 27 mm and the outer diameter of 12 mm, and the pitch width between those grooves is set to 0.2 mm.
- the hydraulic fluid may use, for example, water, ammonia, etc., as the force of alcohol, and the groove width and groove depth are determined in consideration of the surface tension of the fluid. These specific dimensions are fixedly selected for implementation It may be selected as long as it can perform the pump-up function of the hydraulic fluid that can withstand practical use in consideration of the workability, processing efficiency, economy, etc. in the groove machining.
- the maximum groove width Wg with respect to the pipe diameter at which the hydraulic fluid can be raised by capillary force is given by the following equation (3).
- Wg ⁇ (1) Wg is the groove width of the narrow groove
- ⁇ is the surface tension of the working fluid
- ⁇ ⁇ ⁇ is the minimum contact angle
- D is the pipe diameter ( Maximum capillary height).
- FIG. 3 exemplifies various groove shapes which can be selected as the narrow groove G.
- the rectangular groove (U-shaped groove) of (a), the V-shaped intermittent groove of (b), (c V-shaped continuous groove (saw blade-like groove), U-shaped groove of (d), or any other groove shape may be selected as long as the above function can be achieved.
- the circumferential direction of the pipe is a continuous spiral groove, as shown in FIG. 2 (b), and the groove may be a complete loop of a complete loop, and as shown in FIG. 2 (c). It may be formed.
- FIG. 4 shows the function of cooling the floor when the temperature is high in the summer room.
- cold water as a cold heat source is connected to the inside of the inner pipe 14 via a pipe (not shown) communicating outside the pipe. It is cyclically supplied by the drive mechanism.
- the cold water is generated, for example, via a chiller or a heat pump system (not shown).
- the outer wall surface of the outer tube 12 is a heat receiving surface in contact with high temperature (eg, 30 ° C. or more) to receive heat
- the inner wall surface of the inner tube 14 is a heat dissipation surface.
- the working fluid Q filled in the working space S between the outer pipe 12 and the inner pipe 14 ascends the inner wall surface 121 of the outer pipe 12 by capillary force (si), and the membrane is spread over the entire inner wall surface of the outer pipe 12 Stick to the shape.
- the working fluid in the liquid phase evaporates in contact with the inner wall surface 121 of the outer tube 12 heated to the surrounding high temperature (s2), changes into a gas phase and diffuses into the working space S.
- the hydraulic fluid changes into a gas phase and is cooled in contact with the outer wall surface 141 of the inner pipe 14 through which cold water flows and condensed (s3), and the narrow concave of the outer wall surface of the inner pipe 14 Go down the groove G along the circumferential direction and return to the hydraulic fluid reservoir 20. Then, the hydraulic fluid in the liquid reservoir ascends on the inner wall surface 121 of the outer pipe 12, sticks in a film form over the entire inner wall surface of the outer pipe 12, evaporates and diffuses to the working space, and condenses on the outer wall surface of the inner pipe. Thereafter, the outer pipe is cooled while repeating this cycle.
- the inner wall surface 121 of the outer tube 12 is provided with a large number of narrow recessed grooves in the circumferential direction and in the longitudinal direction of the tube, and the working fluid can be stored in the form of streaks in the individual narrow recessed grooves.
- a minute and equal amount of working fluid is evenly distributed and stuck on the tube wall surface, so that it evaporates efficiently, and it operates by capillary force. Pump up the fluid.
- a large number of narrow grooves are formed circumferentially in both the inner wall surface of the pipe and the outer wall surface of the inner pipe, and the working fluid is always carried on the pipe surface through the narrow grooves.
- the hydraulic fluid is guided up and down along the surface of each tube, so that the rise by capillary force and the flow of the condensed liquid phase can be smoothly performed.
- the outer tube heated from the surroundings is a part of it Because it directly contacts the thin liquid film of the working fluid in the narrow groove and evaporates it, the heat transfer coefficient of the evaporation part which heat resistance is extremely small is remarkably improved. Further, the hydraulic fluid is supplied to the evaporation section by the pumping action of the narrow groove and the axial center CS of the inner pipe 14 is positioned lower than the axial center CL of the outer pipe 12 structurally.
- the heat transfer in the condensation section can be synergistically improved.
- the wall surface 121 of the outer pipe serves as the evaporation part
- the outer surface 141 of the inner pipe serves as the condensation part.
- Cold water supplied into the inner pipe for example, has no activity when it is used during summer sleep, and it cools the part near the back to achieve this by cooling to about 27 ° C to 28 ° C.
- Simple degree of cooling setup and implementation For example, by supplying water of about 15 ° C. to the inner pipe, it is not only easy to cool the floor or the surface of the tatami mat to 27 ° C. or 28 ° C., it is also possible to cool it to a lower temperature.
- FIG. 5 shows the case where the floor is heated when winter temperature is low.
- hot water or hot water as a heat source is not shown in the inner pipe 14 as a heat source, a boiler or hot water.
- the inner wall surface of the inner pipe 14 is a heat receiving surface
- the outer wall surface of the outer pipe is in contact with cold air to be a heat dissipating surface.
- the working fluid Q ascends the outer wall surface 141 of the inner pipe 14 by capillary force (s21), and sticks to the entire outer wall surface of the inner pipe 14 in a film shape.
- the working fluid in the liquid phase evaporates in contact with the outer wall surface 141 of the inner pipe 14 heated to a high temperature fluid in the inner pipe (s22), changes into a gas phase, and diffuses into the working space S.
- the hydraulic fluid changes into a gas phase, is cooled in contact with the inner wall surface 121 of the outer pipe 12 in contact with cold air and condenses (s23), and the narrow groove G of the inner wall surface of the outer pipe 12 Along the way, it flows down circumferentially and returns to hydraulic fluid reservoir 20.
- the working fluid is accumulated in the form of streaks in the individual narrow grooves of the many narrow grooves of the outer wall surface 141 of the inner pipe 14, and the heat from the inside of the inner pipe is directly It is transferred to the hydraulic fluid, and minute and equal amounts of the hydraulic fluid are evenly distributed and stuck on the tube wall surface and evaporate efficiently, and the capillary force is used to pump up the hydraulic fluid to improve the heat transfer in the evaporation section. Effectively heat the outer tube area.
- the inner pipe outer wall surface 141 is an evaporation portion
- the outer pipe wall surface 121 is a condensation portion.
- the pipe circumference is provided on both the outer pipe wall surface and the inner pipe outer wall surface. Since a large number of narrow grooves are provided in the direction, it is possible in particular to switch the supply of heat from the heat source fluid or cooling fluid, which causes heating or cooling around the device to flow through the inner pipe. It is possible to achieve practical use of heating and cooling devices with one device.
- FIG. 7 shows an example of installation where the thermal siphon device 10 described above is installed on the lower surface of a floor in a room to be used as a floor heating and cooling device, and the thermal insulation installed on the lower surface of the floor 22
- the thermal siphon system 10 is brought into the space of the mat 24 to heat or cool the floor 22.
- a connecting hose made of a synthetic resin flexible pipe or the like having high strength and corrosion resistance between the projecting portions of the inner pipe. Insert and connect to both ends of 26. Therefore, even when connecting several or several tens of communicating curved pipes as shown in FIG. Also, the maintenance can be done easily.
- thermal siphon apparatus 101 according to another embodiment of the present invention will be described with reference to FIGS. 8 and 9.
- the same members as those of the thermal siphon apparatus of the first embodiment described above will be described.
- the same reference numerals are given and the description thereof is omitted.
- the thermal siphon apparatus 101 of the second embodiment shown in FIG. 8 is a double-pipe type thermal siphon apparatus installed in the same horizontal direction as the first embodiment, and the inside of the outer tube 12 facing the working space S.
- a large number of narrow grooves G are formed in the circumferential direction only on the wall surface 121, and the outer wall surface 141 of the inner pipe 14 is simply formed as a smooth cylindrical outer surface.
- the working fluid film adheres to the wall surface of the outer tube by capillary force via the narrow groove G in the wall surface of the outer tube, so when cooling the periphery of the device, the diagram of the first embodiment This can be effectively implemented as in the fourth example.
- a large number of narrow grooves G are formed in the circumferential direction only on the outer wall surface 141 of the inner pipe 14 facing the working space S.
- the inner wall surface 121 of the pipe 12 is simply a cylindrical inner surface.
- the working fluid film adheres to the outer wall surface of the inner pipe by capillary force via the narrow recessed groove G of the outer wall surface of the inner pipe, so when heating or heating the periphery of the device, This can be effectively realized by the same operation as the example of FIG. 5 of one embodiment.
- thermosiphon device When the thermosiphon device according to any one of the first to second embodiments described above is embedded in plant cultivation soil for agricultural cultivation and can be planted, it can be favorably grown, and in particular It is effective for cultivating plants that dislike plateau vegetables and high-temperature soil because it can reliably perform the cooling action. Therefore, these crops can be grown on flat land or any area.
- the maximum heat transfer rate was calculated by the capillary pressure limit when water was used.
- the maximum hydraulic fluid depth Hp was 6 mm, and the minimum distance between the inner and outer pipes He was 5.5 mm.
- Qmax / L (W / m) is the maximum heat transfer per unit length
- Wg is the outer tube group (thin groove) width
- Hmax is the maximum capillary height
- Hg is the outer tube group depth
- Sg is the pitch width between the outer tube and the groove
- Ng is the number of outer tube groups per unit length.
- thermosiphon device according to the present invention the cooling and heating device using the same, and the method and the plant cultivation method of the present invention are not limited to the configuration of the above-described embodiment, and the scope of the invention is not limited to the claims. Modifications without departing from the essence of the described invention are also included in the present invention.
- the thermal siphon apparatus of the present invention can be applied as cooling from the lower floor part of a house or a building, heating, heat exchange with another fluid or gas, and various other cooling / heating (heating) apparatuses. Furthermore, the thermosiphon device of the present invention can be introduced into plant cultivation soil and used to promote plant cultivation.
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Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US10/565,493 US20060185828A1 (en) | 2003-07-22 | 2004-07-20 | Thermosyphon device, cooling and heating device and method using the thermosyphone device, and plant cultivating method |
Applications Claiming Priority (2)
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JP2003199754A JP2005042939A (ja) | 2003-07-22 | 2003-07-22 | 熱サイホン装置、それを用いた冷却、加温装置及びその方法ならびに植物の栽培方法 |
JP2003-199754 | 2003-07-22 |
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WO2005008161A1 true WO2005008161A1 (ja) | 2005-01-27 |
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JP (1) | JP2005042939A (ja) |
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AU2009241162B2 (en) * | 2008-04-30 | 2011-11-17 | Daikin Industries, Ltd. | Heat exchanger and air conditioning system |
US7796389B2 (en) * | 2008-11-26 | 2010-09-14 | General Electric Company | Method and apparatus for cooling electronics |
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- 2004-07-20 US US10/565,493 patent/US20060185828A1/en not_active Abandoned
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US20060185828A1 (en) | 2006-08-24 |
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