US20070079951A1 - Heat storage unit - Google Patents
Heat storage unit Download PDFInfo
- Publication number
- US20070079951A1 US20070079951A1 US10/580,048 US58004804A US2007079951A1 US 20070079951 A1 US20070079951 A1 US 20070079951A1 US 58004804 A US58004804 A US 58004804A US 2007079951 A1 US2007079951 A1 US 2007079951A1
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- US
- United States
- Prior art keywords
- heat storage
- heat
- supply pipe
- storage body
- exchange medium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/02—Materials undergoing a change of physical state when used
- C09K5/06—Materials undergoing a change of physical state when used the change of state being from liquid to solid or vice versa
- C09K5/063—Materials absorbing or liberating heat during crystallisation; Heat storage materials
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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
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/02—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat
- F28D20/025—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat the latent heat storage material being in direct contact with a heat-exchange medium or with another heat storage material
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Abstract
A heat storage unit capable of efficiently storing heat in a short time. The unit includes: a heat storage container 1 a that houses sodium acetate 3, which stores heat by a state change between solid and liquid, and oil 2, which exchanges heat by directly contacting the sodium acetate 3, has smaller specific gravity than that of the sodium acetate 3, and is separated from the sodium acetate 3. Further, the unit includes: a supply pipe 4 that passes at least through the sodium acetate 3 housed in the heat storage container 1 a and supplies the oil 2 into the heat storage container 1 a; and a discharge pipe that discharges the oil 2 housed in the heat storage container 1 a to the outside of the heat storage container 1 a. Then, the supply pipe 4 crosses the boundary surface between the oil 2 and the sodium acetate 3 which are housed in the heat storage container 1 a, has a plurality of discharge holes that discharge the supplied oil 2 a, and at least one of the discharge holes 6 are positioned in the oil 2.
Description
- The present invention relates to a heat storage unit capable of storing generated heat and transporting the heat to a remote place.
- Heat generated from a factory such as an ironworks and garbage-disposal facility, for example, is used in various kinds of facility near the factory. Further, by temporarily storing the heat generated from the factory in a heat storage body or the like and by transporting the heat storage body, the heat can be used in the remote place from the factory. As a device for storing heat, there exists a device that performs heat exchange by allowing a medium such as oil, to which heat is supplied, to directly contact metal hydrate and stores heat in the metal hydrate.
- For example, the heat storage body such as sodium acetate and oil having a smaller specific gravity than that of the heat storage body are housed in the storage container of
Patent Document 1. Since the specific gravity of oil is smaller and the oil and the heat storage body do not mix, they are housed vertically in a separated manner. Then, pipes are disposed in the oil and the heat storage body, and they are severally connected to a heat exchanger. The oil is taken into the heat exchanger from one pipe to supply heat, and the oil to which heat was supplied is discharged from the other pipe into the heat storage body. Since the discharged oil has a small specific gravity, it goes up to the oil in the upper area. Heat is exchanged by the direct contact between the heat storage body and the oil while the oil goes up. By repeating the above-described action, heat is stored in the heat storage body. Then, the pipes ofPatent Document 1 are in a double pipe structure in order to prevent impurities from being mixed into the pipes or the heat exchanger. - Patent Document 1: International Publication No. WO 03/019099 (
FIG. 1 ) - Problems to be Solved by the Invention
- The heat storage body such as sodium acetate that stores heat utilizes latent heat of fusion, where the state of the heat storage body changes from solid to liquid as heat is added, and heat is thus stored. Therefore, in
Patent Document 1, the heat storage body is solid at the starting point of heat supply, so that discharge holes are clogged up by solid heat storage body even when the oil to which heat was supplied is ready to be discharged from the pipe arranged inside the heat storage body, the oil cannot be discharged until heat is applied to the heat storage body to change its state to liquid, and heat cannot be supplied to the heat storage body. As a result, enormous time is spent in storing heat. - Consequently, it is an object of the present invention to provide a heat storage unit capable of storing heat efficiently in a short time.
- Means for Solving the Problems and Effects
- The present invention includes: a storage container that houses a heat storage body, which stores heat by a state change from solid to liquid, and a heat exchange medium, which exchanges heat by directly contacting the heat storage body, has a smaller specific gravity than that of the heat storage body, and is separated from the heat storage body; a supply pipe that passes through at least the heat storage body housed in the storage container and supplies the heat exchange medium into the storage container; and a discharge pipe that discharges the heat exchange medium housed in the storage container to the outside of the storage container, in which the supply pipe crosses a boundary surface between the heat exchange medium and the heat storage body, has a plurality of discharge holes that discharge the supplied heat exchange medium, and at least one of the discharge holes is positioned inside the heat exchange medium.
- With this constitution, the heat exchange medium can be discharged from the supply pipe regardless of the state of the heat storage body because the discharge holes are provided in the heat exchange medium side. The heat storage body is solid under normal state and changes to liquid as heat is stored. For this reason, the discharge holes are clogged up by the solid heat storage body at the starting point of heat supply even if the discharge holes are provided for the supply pipe arranged in the heat storage body. Then, the supplied heat exchange medium can be discharged by providing the discharge holes on the heat exchange medium side, and heat can be conducted to the heat storage body. Then, once the heat storage body changes from solid to liquid, the heat exchange medium can be discharged from the discharge holes provided on the heat storage body side as well. This makes it possible to contact the heat storage body and the heat exchange medium in a short time, so that a heat storage time can be shortened. Further, when the discharge holes are not provided in the heat exchange medium, there is a possibility that the discharge holes provided on the heat storage body side are clogged up, the heat exchange medium passing through the supply pipe is not discharged and heat cannot be stored, but such danger can be eliminated.
- It is preferable that the supply pipe of the present invention cross vertically with respect to the boundary surface. With this, the heat exchange medium can be discharged along the supply pipe by allowing the supply pipe to cross vertically the boundary surface, and heat can be stored in the heat storage body near the supply pipe first. Thus, heat exchange from the heat exchange medium to the heat storage body can be performed efficiently.
- In this case, it is preferable that the supply pipe be disposed coaxially around the circumference of an area having the discharge holes and have a circulation pipe to allow the heat exchange medium discharged from the discharge holes to go up in the vertical direction. With this constitution, by allowing the supplied heat exchange medium to be discharged in the vertical direction along the circulation pipe, circulating flow associated with temperature change occurs around the circulation pipe. With this, heat can be conducted efficiently to the heat storage body and a heat storage time can be shortened.
- In another aspect, the present invention includes: a storage container that houses a heat storage body, which stores heat by a state change from solid to liquid, and a heat exchange medium, which exchanges heat by directly contacting the heat storage body, has a smaller specific gravity than that of the heat storage body, and is separated from the heat storage body; a supply pipe that passes through at least the heat storage body housed in the storage container and supplies the heat exchange medium into the storage container; and a discharge pipe that discharges the heat exchange medium housed in the storage container to the outside of the storage container, in which the supply pipe includes a first supply pipe having discharge holes that discharge the supplied heat exchange medium into the heat storage body and a second supply pipe that crosses the boundary surface between the heat exchange medium and the heat storage body, which are housed in the storage container, and has an outlet inside the heat exchange medium.
- With this constitution, heat storage time can be shortened by using first and second flow pipes. The heat storage body can store heat by changing its state from solid to liquid. Therefore, since the heat storage body is solid at the starting point of heat storage, the discharge holes provided for the first supply pipe are clogged up and they cannot discharge the supplied heat exchange medium. On the other hand, since the second supply pipe has an outlet in the heat exchange medium, it can constantly discharge the supplied heat exchange medium. For this reason, heat can be conducted by indirect contact of the heat exchange medium flowing in the second supply pipe to change the heat storage body from solid to liquid. Then, by changing the heat storage body to liquid, the heat exchange medium can be discharged from the discharge holes of the first supply pipe. By switching the two supply pipes to store heat in the heat storage body in this manner, heat storage time can be shortened.
- It is preferable for the present invention that, in the heat storage body, the second supply pipe surround at least a part of the first supply pipe including the discharge holes and have a communicating portion that guides the discharge holes to the heat exchange medium. With this, when the second supply pipe is surrounded by the first supply pipe, the periphery of the second supply pipe and the periphery of the discharge holes for heat exchange medium of the first supply pipe can be heated by the heat exchange medium flowing in the second supply pipe. By quickly heating these areas to melt the solid heat storage body, the heat exchange medium is quickly discharged from the first supply pipe to allow the heat storage body to directly contact the heat exchange medium, and the heat storage time can be shortened.
- It is preferable for the present invention that a switching valve for switching supply and cutoff of the heat exchange medium depending on the state of the heat storage body be provided severally for the first and second supply pipes. With this constitution, timing for switching the supply pipes can be changed depending on the state of the heat storage body, and heat can be stored more efficiently. For example, the pipes can be switched such that the heat exchange medium is supplied to both of the first supply pipe and the second supply pipe at the starting point of heat storage and then the medium is supplied only to the first supply pipe, and thus heat can be stored efficiently.
- In the case where the supply pipe or at least a part of the first supply pipe extends in the horizontal direction, the present invention may be provided with the discharge holes for an area extending in the horizontal direction such that the holes are open in the vertically downward direction. With this, the specific gravity of the heat exchange medium is smaller than that of the heat storage body, so that a danger that the heat storage body enters inside the supply pipe from the discharge holes is eliminated when the discharge holes are open downward.
- It is preferable for the present invention that, in the heat storage body, the supply pipe or the first supply pipe have an expanded portion that is in a shape that widens toward the end and provided with the discharge holes on the bottom surface. With this constitution, the specific gravity of the heat exchange medium is smaller than that of the heat storage body, so that a danger that the heat storage body enters inside the supply pipe from the discharge holes is eliminated because the discharge holes are open downward. Furthermore, more heat exchange medium can be discharged by forming the pipe in the shape that widens toward the end, and the heat storage time can be shortened.
- Further, in another aspect, the present invention includes: a storage container that houses a heat storage body, which stores heat by a state change from solid to liquid, and a heat exchange medium, which exchanges heat by directly contacting the heat storage body, has a smaller specific gravity than that of the heat storage body, and is separated from the heat storage body; a supply pipe that passes through at least the heat storage body housed in the storage container and supplies the heat exchange medium into the storage container; and a discharge pipe that discharges the heat exchange medium -housed in the storage container to the outside of the storage container, in which the supply pipe includes a first supply pipe having an outlet that discharges the supplied heat exchange medium into the housed heat storage body and a second supply pipe that has at least a part of the first supply pipe inside thereof and has discharge holes that discharge the supplied heat exchange medium into the heat storage body.
- With this constitution, the heat exchange medium can constantly flow in the first supply pipe regardless of the state of heat storage body, so that heat can be conducted to the heat exchange medium in the second supply pipe and high temperature can be maintained. Thus, high temperature can be discharged from the discharge holes, so that heat can be sufficiently stored.
- It is preferable that the present invention, in the case where the supply pipes are provided parallelly in the heat storage body, be provided with a thermal conduction member for conducting heat of the supply pipes to the heat storage body between the supply pipes. With this, heat can be supplied to the heat storage body in a shorter time, and the heat storage time can be shortened.
- It is preferable that at least a part of the supply pipe of the present invention be provided on the bottom surface of the storage container. With this constitution, the heat exchange medium to be discharged goes up because its specific gravity is lighter than the heat storage body, and a contact time between the discharged heat exchange medium and the heat storage body can be made longer by providing the supply pipe on the bottom surface. Further, in the present invention, it is preferable that the second supply pipe be provided on the bottom surface of the storage container so as to cover the bottom surface. With this, a contact surface between the second supply pipe and the heat storage body is wide and heat can be stored from the bottom portion of the heat storage body, so that the heat storage time can be shortened.
- It is preferable that the connection port of the supply pipe of the present invention be positioned above the connection port of the discharge pipe. With this constitution, by allowing the connection port of the supply pipe to be positioned higher than the connection port of the discharge pipe, the heat exchange medium from the discharge pipe can be inversely flown first when the heat storage body or the heat exchange medium flows inversely, and it is possible to avoid a danger that the heat storage body to which heat is stored flows inversely.
- It is preferable that the present invention have wave-absorbing plates that are parallelly arranged with each other along the boundary surface between the heat storage body and the heat exchange medium, arranged vertically with respect to the boundary surface, and prevent agitation on the boundary surface. With this constitution, it is possible to prevent agitation on the boundary surface caused by vibration associated with transportation in the heat storage state.
- It is preferable that the discharge pipe of the present invention include a separation mechanism that separates the heat storage body and the heat exchange medium. With this constitution, the heat storage body can be removed if it is mixed in the heat exchange medium to be discharged outside the storage container. In this case, it is preferable that the separation mechanism have a separator for allowing the heat exchange medium and the heat storage body, which were taken in, to flow horizontally in one direction and a discharge hole that discharges the heat storage body, which is being precipitated, from the separator, and the separator have a shape for guiding the precipitated heat storage body toward the discharge hole. With this, the heat storage body and the heat exchange medium can be separated with a simple structure.
- Furthermore, it is preferable that the heat storage body of the present invention be erythritol. With this, it is possible to store heat efficiently in a short time.
- Best Mode for Implementing the Invention
- In the following, description will be made for the preferred embodiments of the present invention with reference to the drawings.
- (First Embodiment)
- A
heat storage unit 1 according to the first embodiment of the present invention is preferably used in a portable heat storage unit. For example, as shown inFIG. 1 , it is applied for a heat transportation system that transports heat when afactory 60 generating heat andfacility 70 using the heat are remote from each other. Theheat storage unit 1 is detachable toconnection ports heat exchangers heat storage unit 1, and is transported between thefactory 60 and thefacility 70 by avehicle 50 such as a truck. Thefactory 60 is a garbage-incinerating facility, a power generating plant, an ironworks or the like, and heat generated in the factory is stored in theheat storage unit 1 via theheat exchanger 5 a. Further, thefacility 70 is facility such as a heated swimming pool and a hospital, and the heat stored in theheat storage unit 1 is applied for temperature-control system or the like in the facility via theheat exchanger 5 b. In the following description, heat exchange in thefactory 60 side will be explained. - The
heat storage unit 1 includes aheat storage container 1 a (storage container) that houses oil 2 (heat exchange medium) and sodium acetate trihydrate salt 3 (heat storage body) (hereinafter, referred to as sodium acetate 3), asupply pipe 4, and adischarge pipe 6. Since theoil 2 and thesodium acetate 3 are not mixed with each other and theoil 2 has a smaller specific gravity than that of thesodium acetate 3, theoil 2 and thesodium acetate 3 are housed in theheat storage container 1 a severally in an upper layer and a lower layer in a separate manner. Furthermore, since theoil 2 and thesodium acetate 3 are not mixed, that is, theoil 2 and thesodium acetate 3 are separate from each other, a member or the like for separating theoil 2 from thesodium acetate 3 is not laid between them and theoil 2 is in directly contact with thesodium acetate 3. - The
oil 2 performs heat exchange with thesodium acetate 3 by direct contact with thesodium acetate 3. Theoil 2, when it is taken into theheat exchanger 5 a from the discharge pipe 6 (described later) and heat is supplied in theheat exchanger 5 a (in the description below, theoil 2 to which heat was supplied in theheat exchanger 5 a will be calledoil 2 a), it is discharged into thesodium acetate 3 via thesupply pipe 4. Since the dischargedoil 2 a has a smaller specific gravity than that of thesodium acetate 3, it goes up to theoil 2 of the upper layer and is taken in by theoil 2. During the upward movement, the heat supplied to theoil 2 a is conducted to thesodium acetate 3 due to the direct contact with thesodium acetate 3. - The
sodium acetate 3 stores the heat conducted from the above-describedoil 2 a. The melting point of thesodium acetate 3 is about 58° C. and it is solid under the normal state (room temperature). Then, its state changes from solid to liquid when the heat is conducted from theoil 2 a due to the direct contact, and heat is stored during a liquid state. - The
supply pipe 4 is provided in the upper layer portion of theheat storage container 1 a, where the housedoil 2 is positioned, in a penetrated manner, and aconnection port 41 is detachably connected to theconnection port 51 of theheat exchanger 5 a. Thesupply pipe 4 that is provided for theheat storage container 1 a in a penetrated manner vertically crosses the boundary surface between theoil 2 and thesodium acetate 3 and enters thesodium acetate 3, and furthermore, it is bent in an L-shape and horizontally extended. Thesupply pipe 4 has an internal space and theoil 2 a to which heat was supplied by theheat exchanger 5 a flows in the internal space. - Further, the
supply pipe 4 has a plurality ofdischarge holes oil 2 a flowing inside the pipe, along its axis direction. A plurality ofdischarge holes 4 a are provided above a boundary surface while using the boundary surface between theoil 2 and thesodium acetate 3 as a boundary, that is, on thesupply pipe 4 of theoil 2 side. Furthermore, one ormore discharge holes 4 b are provided below the boundary surface, that is, on thesupply pipe 4 of thesodium acetate 3 side. Note that the discharge holes 4 b provided in an area where thesupply pipe 4 is bent in an L-shape and horizontally extended, are provided so as to be open vertically downward. Thus, since thesodium acetate 3 has a larger specific gravity than that of theoil 2 a, thesodium acetate 3 does not enter thesupply pipe 4 while pushing aside theoil 2 a to be discharged from the discharge holes 4 b, and this prevents thesodium acetate 3 from being solidified and clogged inside thesupply pipe 4. - The
discharge pipe 6 is provided in the upper layer portion of theheat storage container 1 a, where the housedoil 2 is positioned, in a penetrated manner. Then, aconnection port 61 of thedischarge pipe 6 is detachably connected to theconnection port 52 of theheat exchanger 5 a to take theoil 2 inside theheat storage container 1 a into theheat exchanger 5 a. At this point, theconnection port 61 of thedischarge pipe 6 is disposed on theheat storage container 1 a so as to be below theconnection port 41 of thesupply pipe 4, that is, such that thedischarge pipe 6 is below thesupply pipe 4. If thesupply pipe 4 and thedischarge pipe 6 are removed from theheat exchanger 5 a in a wrong procedure, there is a possibility that theoil 2 or thesodium acetate 3 flows inversely due to a pressure difference between the outside and the inside of theheat storage container 1 a. For this reason, thedischarge pipe 6 is arranged below thesupply pipe 4 to allow theoil 2 to which heat is not applied to flow inversely first from thedischarge pipe 6. Consequently, a pressure difference from the outside is eliminated and a danger that thesodium acetate 3 to which heat is stored flows inversely from thesupply pipe 4 is prevented. - The
heat exchanger 5 a stores heat generated from thefactory 60 in theheat storage container 1 a. As described above, thesupply pipe 4 and thedischarge pipe 6 are connected detachably to theheat exchanger 5 a. Then, thesupply pipe 4 and thedischarge pipe 6 are communicated with each other in theheat exchanger 5 a. Moreover, a pipe (not shown) that takes in the heat generated from thefactory 60 as steam and a pipe (also not shown) that discharges steam from which heat has been removed are connected to theheat exchanger 5 a, and the pipes are communicated with each other in theheat exchanger 5 a via a pipe arranged so as to surround the communicated portion between thesupply pipe 4 and thedischarge pipe 6. Further, a pump (not shown) is disposed for theconnection port 51 of theheat exchanger 5 a, and it takes theoil 2 into theheat exchanger 5 a and sends theoil 2 that was taken in to theheat storage container 1 a. - The
heat exchanger 5 a takes in theoil 2 insideheat storage container 1 a by the pump via thedischarge pipe 6 while it takes in steam generated from thefactory 60 via the pipe. The steam that was taken in conducts heat to theoil 2, which was taken in, by indirect contact of the pipes in the communicated portion between thesupply pipe 4 and thedischarge pipe 6. After that, theoil 2 a to which heat was supplied is supplied into theheat storage container 1 a via thesupply pipe 4. In addition, the steam from which heat was removed is discharged via the pipe. When theheat exchanger 5 a repeats the above-described action, the heat generated from thefactory 60 can be stored in thesodium acetate 3 of theheat storage unit 1. - Next, description will be made for the heat storage method to the
heat storage unit 1. - The steam generated from the
factory 60 is taken into theheat exchanger 5 a. On the other hand, theoil 2 inside theheat storage container 1 a is taken into theheat exchanger 5 a via thedischarge pipe 6. Then, in theheat exchanger 5 a, heat of the steam is conducted to theoil 2 that was taken in. Theoil 2 a to which heat was supplied is returned to theheat storage container 1 a via thesupply pipe 4. - The
oil 2 a flows in thesupply pipe 4 and is discharged from the discharge holes 4 a, 4 b. Since thesodium acetate 3 at the starting point of heat storage is solid and the discharge holes 4 b are provided in thesodium acetate 3 side, the discharge holes 4 b is in the state of being clogged by thesolid sodium acetate 3. For this reason, theoil 2 a is not discharged from the discharge holes 4 b. - On the other hand, since the discharge holes 4 a are provided in the
oil 2 side, theoil 2 a can be discharged without clogging the discharge holes 4 a. Then, theoil 2 a discharged from the discharge holes 4 a conducts heat to thesodium acetate 3 near the boundary surface between theoil 2 and thesodium acetate 3. With this, the state of thesodium acetate 3 gradually changes from solid to liquid from the upper portion thereof, and theoil 2 a is discharged from the discharge holes 4 b as well. Due to the direct contact with the dischargedoil 2 a, heat is stored in thesodium acetate 3. Furthermore, theoil 2 a flowing in thesupply pipe 4 conducts heat to thesodium acetate 3 via thesupply pipe 4 due to the indirect contact. This makes it possible to change thesodium acetate 3 from solid to liquid even faster and the heat storage time can be shortened. - When the
sodium acetate 3 becomes a liquid state and theoil 2 a is discharged into thesodium acetate 3, it goes up to theoil 2 in the upper layer and is taken into the layer because the specific gravity of theoil 2 a is smaller than that of thesodium acetate 3. Theoil 2 a conducts heat to thesodium acetate 3 as it goes up. By repeating the above-described action, heat can be stored in thesodium acetate 3. - Meanwhile, description has been made for the heat exchange in the
factory 60 side, but the same applies to the heat exchange in thefacility 70 side. Specifically, thesodium acetate 3 is liquid in the state where heat was supplied, and stored heat can be taken out from the liquid. Thesupply pipe 4 and thedischarge pipe 6 of theheat storage unit 1 are connected detachably to theheat exchanger 5 b that takes out the heat stored in theheat storage unit 1, and furthermore, a pipe for taking in gas or liquid and a pipe for supplying to heated gas or liquid and for supplying to the temperature-control system of thefacility 70 are connected to theheat exchanger 5 b. - The
heat exchanger 5 b discharges theoil 2 into thesodium acetate 3 in which heat is stored via thesupply pipe 4. Heat is conducted from thesodium acetate 3 to the dischargedoil 2 due to the direct contact as it goes up. With this, heat is supplied to theoil 2 in the upper layer and the oil is taken into theheat exchanger 5 b from thedischarge pipe 6. On the other hand, gas or liquid such as water is taken into theheat exchanger 5 b. Then, heat is conducted from theoil 2 to which heat was applied to gas or liquid. The gas or liquid to which heat was conducted passes through the pipe and is supplied to the temperature-control system in thefacility 70. By repeating the above-described action, heat stored in thesodium acetate 3 can be taken out. - Next, description will be made for a heat transportation system using the
heat storage unit 1 according to the first embodiment. By repeating the above-described action, the heat generated from thefactory 60 due to garbage incineration or the like is stored in theheat storage unit 1. Since theheat storage unit 1 is connected to theheat exchanger 5 a detachably, it is removed after heat storage is completed, and transported to thefacility 70 requiring the stored heat by thevehicle 50 such as a truck. The transportedheat storage unit 1 is connected to theheat exchanger 5 b, the heat stored in theheat storage unit 1 is taken out, and used in the temperature-control system or the like of thefacility 70. - As described above, because the discharge holes 4 a are provided in the
oil 2 side of thesupply pipe 4 in this embodiment, even if thesodium acetate 3 is solid at the starting point of heat storage, thesolid sodium acetate 3 can be changed to liquid in a shorter time by discharging theoil 2 a from the discharge holes 4 a. With this, the heat storage time to thesodium acetate 3 can be shortened. - Furthermore, by allowing the
supply pipe 4 to vertically cross the boundary surface between theoil 2 and thesodium acetate 3, thesodium acetate 3 near thesupply pipe 4 can be changed from solid to a liquid state by theoil 2 a discharged from the discharge holes 4 a, and thus theoil 2 a can be discharged faster from the discharge holes 4 b. Consequently, the heat storage time can be even shorter. - Meanwhile, as a modified example of this embodiment, a
circulation pipe 4 c may be provided as shown inFIG. 3 . Thecirculation pipe 4 c is provided so as to surround the circumference of thesupply pipe 4 that vertically crosses boundary surface between theoil 2 and thesodium acetate 3, and serves as a guide for allowing theoil 2 a, which is discharged from the discharge holes 4 b, to go up in the vertical direction after the state of thesodium acetate 3 is changed to liquid. When theoil 2 a to which heat was supplied, which is discharged from the discharge holes 4 b, goes up along thecirculation pipe 4 c, theliquid sodium acetate 3 having low temperature moves toward the bottom portion of thecirculation pipe 4 c, and circulating flow is generated around thecirculation pipe 4 c as shown by the arrows in the drawing. This allows heat to circulate, and an effect is exerted that the heat storage time is shortened by efficiently storing heat in thesodium acetate 3. - Further, as another modified example of this embodiment, a plurality of plates 11 (wave-absorbing plates) may be provided so as to vertically cross the boundary surface between the
oil 2 and thesodium acetate 3 as shown inFIG. 4 . By providing theplates 11, theoil 2 and thesodium acetate 3 vibrate during the transportation of theheat storage unit 1 to generate waves, and agitation on the boundary surface can be prevented. By preventing agitation, heat stored in thesodium acetate 3 can be held. - Furthermore, as another modified example, a
separation device 12 may be provided halfway thedischarge pipe 6. The separatingdevice 12 is a device that separates theoil 2 and thesodium acetate 3 when thesodium acetate 3 is mixed in theoil 2 that was taken in. For example, although not shown, theseparation device 12 has a structure where it takes out theoil 2, which was taken in, from the upper portion of theseparation device 12 while it spirally rotates theoil 2 that was taken in. In this case, since thesodium acetate 3 has a larger specific gravity than that of theoil 2, thesodium acetate 3 is discharged from an outlet at the bottom portion of theseparation device 12 along the sidewall surface of theseparation device 12 when it hits the sidewall surface due to centrifugal force, and only theoil 2 is taken into theheat exchanger 5 a. With this, thesodium acetate 3 can be removed from theoil 2 to be taken into theheat exchanger 5 a, and a danger of a failure or the like that is caused when thesodium acetate 3 enters theheat exchanger 5 a is eliminated. The above-described modified examples can be applied for embodiments described below. - Meanwhile, the
supply pipe 4 vertically crosses the boundary surface between theoil 2 and thesodium acetate 3 in this embodiment described above, but it may cross the boundary surface diagonally instead of vertically. Further, thesupply pipe 4 is bent in the L-shape and extended in the horizontal direction, but it may not be extended in the horizontal direction. The pipe may be any shape as long as it can discharge theoil 2 in thesodium acetate 3. Moreover, the side surface may be a shape that widens toward the end as shown inFIG. 6 , or a supply portion 13 (expanded portion) having the shape that widens toward the end may be provided halfway thesupply pipe 4. In this case, it may be a conical shape or may be hemispherical shape. Further, in this case, by providing discharge holes 13 a at the bottom surface portion, a danger that thesodium acetate 3 enters inside the pipe is eliminated. - Furthermore, in this embodiment, the discharge holes 4 b, which are provided in the horizontally extended portion of the
supply pipe 4 in thesodium acetate 3, are provided on the lower portion of thesupply pipe 4, but they may be provided on the upper portion thereof. In addition, in this embodiment, sodium acetate is used as a substance for storing heat and oil is used as a substance for conducting heat, but the substances are not limited to them. For example, the heat storage body may be erythritol. Since erythritol can be heated by oil having the temperature of 120° C. or higher, it exerts an effect that heat can be stored efficiently in a short time. - (Second Embodiment)
- Next, description will be made for the heat storage unit according to the second embodiment of the present invention. The heat storage unit according to this embodiment is different from the first embodiment on the point that it is provided with two supply pipes. In the following, only the different point will be described. Note that the same reference numerals are applied to the same members as those of the first embodiment, and their explanation will be omitted.
- As shown in
FIG. 7 , theheat storage unit 1 according to this embodiment is provided with a first supply pipe 7 (first supply pipe) and a second supply pipe 8 (second supply pipe). Thefirst supply pipe 7 and the second supply pipe 8 are provided in the upper layer portion of theheat storage container 1 a, where the housedoil 2 is positioned, in a penetrated manner, and is detachably connected to theheat exchanger 5 a. Specifically, the connection port of onesupply pipe 11 is detachably connected to theconnection port 51 of theheat exchanger 5 a, and thesupply pipe 11 branches into thefirst supply pipe 7 and the second supply pipe 8. Thefirst supply pipe 7 and the second supply pipe 8, which are provided for theheat storage container 1 a in a penetrated manner, vertically cross the boundary surface between theoil 2 and thesodium acetate 3 and go into thesodium acetate 3, and furthermore, is bent in the L-shape and extended horizontally. Moreover, the second supply pipe 8 vertically crosses the boundary surface between theoil 2 and thesodium acetate 3 from the end portion of the horizontally extended portion. Thefirst supply pipe 7 and the second supply pipe 8 have an internal space, and theoil 2 a to which heat was supplied by theheat exchanger 5 a flows in the internal space. - The
first supply pipe 7 has a plurality ofdischarge holes 7 a that discharge the suppliedoil 2 a into thesodium acetate 3 along the axis direction thereof. Further, the second supply pipe 8 hasoutlets 8 a that discharge the suppliedoil 2 a into theoil 2. Theoutlets 8 a are provided on the terminal portion of the second supply pipe 8, theoil 2 a supplied from theheat exchanger 5 a flows in the second supply pipe 8, and is discharged into theoil 2 from theoutlets 7 a. The discharge holes 4 b provided on the portion of thefirst supply pipe 7, which is extended in the horizontal direction, are provided in the vertically downward direction. Note that thefirst supply pipe 7 may have discharge holes on theoil 2 side similar to the first embodiment. - As described above, the
supply pipe 11 is detachably connected to theheat exchanger 5 a, and is separated into thefirst supply pipe 7 and the second supply pipe 8. Then,valves first supply pipe 7 and the second supply pipe 8. By opening/closing thevalves oil 2 a to thefirst supply pipe 7 and the second supply pipe 8 can be switched. - The
valves sodium acetate 3. Specifically, when thesodium acetate 3 is solid, thevalve 9 b is closed to prevent theoil 2 a from being supplied to the second supply pipe 8 in order to supply theoil 2 a only to thefirst supply pipe 7. Further, when thesodium acetate 3 is liquid, thevalve 9 a is closed and thevalve 9 b is opened to allow theoil 2 a to be supplied only to the second supply pipe 8. Thevalves - Next, description will be made for the heat storage method to the
heat storage unit 1. - Steam passes through the pipe from the
factory 60 and is taken into theheat exchanger 5 a. On the other hand, theoil 2 in theheat storage container 1 a is taken into theheat exchanger 5 a via thedischarge pipe 6. Then, in theheat exchanger 5 a, heat of the steam is supplied to theoil 2 by thermal conduction. At the starting point of heat storage, only thevalve 9 b is opened to allow theoil 2 a to be supplied only to the second supply pipe 8, and theoil 2 a to which heat was supplied flows in the second supply pipe 8. Theoil 2 a flows in the second supply pipe 8 and is discharged from theoutlets 8 a into theoil 2. Theoil 2 a flowing through the second supply pipe 8 conducts heat to thesodium acetate 3 due to indirect contact via the second supply pipe 8, and thus thesolid sodium acetate 3 changes into liquid. - When the
sodium acetate 3 becomes approximately liquid, thevalve 9 b is closed and thevalve 9 a is opened to cutoff the second supply pipe 8, and theoil 2 a is supplied to thefirst supply pipe 7. Theoil 2 a supplied to thefirst supply pipe 7 flows through thefirst supply pipe 7 and is discharged into thesodium acetate 3 from the discharge holes 7 a. When theoil 2 a is discharged, it goes up to theoil 2 in the upper layer and taken into the oil. Heat is conducted to thesodium acetate 3 during the upward movement due to the direct contact with thesodium acetate 3. With this, heat can be stored in thesodium acetate 3. - As described above, in this embodiment, by using two supply pipes for supplying the
oil 2 a to which heat was supplied, which are thefirst supply pipe 7 and the second supply pipe 8, and switching the pipes depending on the state of thesodium acetate 3, heat can be efficiently store in thesodium acetate 3. Since thesodium acetate 3 is solid at the starting point of heat storage, theoil 2 a is not discharged from the discharge holes provided in thesodium acetate 3. For this reason, theoil 2 a is supplied to the second supply pipe 8 when thesodium acetate 3 is solid to conduct heat to thesodium acetate 3 by indirect contact, theoil 2 a is supplied to thefirst supply pipe 7 and discharged when thesodium acetate 3 becomes liquid to conduct heat to thesodium acetate 3 by direct contact, and thus heat can be efficiently stored in thesodium acetate 3. - Furthermore, there is a possibility that the
first supply pipe 7 could burst because the suppliedoil 2 a is not discharged from the discharge holes 7 a at the starting point of heat storage. For this reason, burst of thefirst supply pipe 7 can be prevented by switching thefirst supply pipe 7 and the second supply pipe 8, and theheat storage unit 1 can be used safely. - Meanwhile, in this embodiment, the
oil 2 is supplied either one of thefirst supply pipe 7 and the second supply pipe 8 depending on the state of thesodium acetate 3, but the invention is not limited to this. For example, theoil 2 a may be supplied to only the second supply pipe 8 at the starting point of heat storage, and after that, theoil 2 a may be supplied to both of thefirst supply pipe 7 and the second supply pipe 8. Further, although thefirst supply pipe 7 a does not have discharge holes in the above-described embodiment, the pipe may have the discharge holes. Furthermore, supply pipes may not have thevalves - (Third Embodiment)
- Next, description will be made for the heat storage unit according to the third embodiment of the present invention. The heat storage unit according to this embodiment is the same as the second embodiment on the point that it is provided with two supply pipes but is different on the point that one supply pipe surrounds the other supply pipe. In the following, only the different point will be described. Note that the same reference numerals are applied to the same members as those of the first and the second embodiments, and their explanation will be omitted.
- As shown in
FIG. 8 , theheat storage unit 1 according to this embodiment has two pipes that are thefirst supply pipe 7 and asecond supply pipe 10. Thefirst supply pipe 7 and thesecond supply pipe 10 are provided in the upper layer portion of theheat storage container 1 a in a penetrated manner, where the housedoil 2 is positioned, and is detachably connected to theheat exchanger 5 a. Specifically, the connection port of onesupply pipe 11 is detachably connected to theconnection port 51 of theheat exchanger 5 a, and thesupply pipe 11 branches into thefirst supply pipe 7 and thesecond supply pipe 10. Then, thefirst supply pipe 7 is arranged in theheat storage container 1 a so as to surround thesecond supply pipe 10. Thefirst supply pipe 7 and thesecond supply pipe 10 vertically cross the boundary surface between theoil 2 and thesodium acetate 3 and go into thesodium acetate 3, and furthermore, are bent in the L-shape and extended horizontally. Thefirst supply pipe 7 and thesecond supply pipe 10 have an internal space, and theoil 2 a to which heat was supplied by theheat exchanger 5 a flows in the internal space. As described above, thefirst supply pipe 7 is arranged in the internal space of thesecond supply pipe 10. - In the horizontally extended portion of the
second supply pipe 10, a plurality ofsupply tubes 10 a, which vertically cross the boundary surface between theoil 2 and thesodium acetate 3, are disposed. Thesupply tubes 10 a haveoutlets 10 b on theoil 2 side, and theoil 2 a flowing through thesecond supply pipe 10 passes through thesupply tubes 10 a to be discharged from theoutlets 10 b into theoil 2, as shown inFIG. 9 . Further, as shown inFIG. 10 ,communication portions 10 c for discharging theoil 2 a flowing through thefirst supply pipe 7 into thesodium acetate 3 are provided for thesecond supply pipe 10 at positions that superpose the discharge holes 7 a of thefirst supply pipe 7 to be surrounded. Note that description of the other members will be omitted because they are the same as the first embodiment. - Next, description will be made for the heat storage method to the
heat storage unit 1. - Steam passes through the pipe from the
factory 60 and is taken into theheat exchanger 5 a. On the other hand, theoil 2 in theheat storage container 1 a is taken into theheat exchanger 5 a via thedischarge pipe 6. Then, in theheat exchanger 5 a, heat of the steam is supplied to theoil 2 that was taken in. At the starting point of heat storage, only thevalve 9 b is opened to allow theoil 2 a to be supplied only to thesecond supply pipe 10. Therefore, theoil 2 a to which heat was supplied flows through thesecond supply pipe 10, passes through thesupply tubes 10 a, and is discharged from theoutlets 10 b into theoil 2. - When the
oil 2 a to which heat was supplied flows through thesecond supply pipe 10 and thesupply tubes 10 a, theoil 2 a conducts heat to thesodium acetate 3 by indirect contact via thesecond supply pipe 10 and thesupply tubes 10 a. With this, thesodium acetate 3 gradually changes from solid to liquid. When thesodium acetate 3 becomes liquid, thevalve 9 b is closed and thevalve 9 a is opened. This allows theoil 2 a to be supplied to thefirst supply pipe 7. Once thesodium acetate 3 becomes liquid, the discharge holes 7 a and thecommunication portions 10 c are not clogged and theoil 2 a can be discharged from the discharge holes 7 a and thecommunication portions 10 c. Further, when theoil 2 a flows through thefirst supply pipe 7, heat is conducted from theoil 2 a flowing through the surroundingsecond supply pipe 10. This further increases the temperature and time to store heat in thesodium acetate 3 can be further shortened. - As described above, in this embodiment, in addition to the effect of the second embodiment, additional heat is supplied from the
second supply pipe 10 to the oil 2b flowing through thefirst supply pipe 7 because thefirst supply pipe 7 is surrounded by thesecond supply pipe 10, and heat can be stored even faster by discharging theoil 2 a into thesodium acetate 3. Moreover, areas of thefirst supply pipe 7 and thesecond supply pipe 10 arranged in thesodium acetate 3 can be made smaller. - Meanwhile, in this embodiment, the
second supply pipe 10 surrounds approximately the entirefirst supply pipe 7 in thesodium acetate 3, but it may surround only a part of thefirst supply pipe 7. Further, similar to the second embodiment, theoil 2 a may be supplied to both of thefirst supply pipe 7 and thesecond supply pipe 10 after thesodium acetate 3 changes to liquid. In addition, the pipes may not have thevalves - (Fourth Embodiment)
- Next, description will be made for the heat storage unit according to the fourth embodiment of the present invention. The heat storage unit according to this embodiment is the same as the third embodiment on the point that it is provided with two supply pipes and one supply pipe surrounds the other supply pipe but structure of each supply pipe is different. In the following, only the different point will be described. Note that the same reference numerals are applied to the same members as those of the first to the third embodiments, and their explanation will be omitted.
- As shown in
FIG. 11 , theheat storage unit 1 according to this embodiment has two pipes that are afirst supply pipe 15 and asecond supply pipe 16. Thefirst supply pipe 15 and thesecond supply pipe 16 are provided in the upper layer portion of theheat storage container 1 a in a penetrated manner, where the housedoil 2 is positioned, and is detachably connected to theheat exchanger 5 a. Specifically, the connection port of onesupply pipe 11 is detachably connected to theconnection port 51 of theheat exchanger 5 a, and thesupply pipe 11 branches into thefirst supply pipe 15 and thesecond supply pipe 16. - The
first supply pipe 15 and thesecond supply pipe 16 vertically cross the boundary surface between theoil 2 and thesodium acetate 3 and go into thesodium acetate 3, and furthermore, are bent in the L-shape and extended horizontally. Thefirst supply pipe 15 is further bent in the L-shape, vertically crosses the boundary surface again, and anoutlet 15 a for discharging theoil 2 a is provided on the tip of the area bent in the L-shape. Thefirst supply pipe 15 and thesecond supply pipe 16 have an internal space, and theoil 2 a to which heat was supplied by theheat exchanger 5 a flows in the internal space. In a portion wheresupply pipes second supply tube 16 surrounds thefirst supply pipe 15. - The portion where the
supply pipes heat storage container 1 a. With this, contact time of theoil 2 a discharged from discharge holes 16 a and thesodium acetate 3 can be made longer, and heat of theoil 2 a can be sufficiently conducted to thesodium acetate 3. Further, as thesodium acetate 3 changes to liquid, theoil 2 a has a smaller specific gravity than that of thesodium acetate 3 and goes up once it is discharged from the discharge holes 16 a, so that it becomes difficult to conduct heat to thesodium acetate 3 near the bottom surface of theheat storage container 1 a and a long time is necessary in storing heat. However, by providing thefirst supply pipes sodium acetate 3 near the bottom surface, and the heat storage time can be shortened. - Further, the discharge holes 16 a for discharging the
oil 2 a into thesodium acetate 3 are provided on thesecond supply pipe 16 in the opposite direction to the bottom surface side of theheat storage container 1 a. With this, theoil 2 a supplied to thesupply pipe 11 passes through thefirst supply pipe 15 and is discharged from theoutlet 15 a into theoil 2, and on the other hand, passes through thesecond supply pipe 16 and is discharged from the discharge holes 16 a into thesodium acetate 3. - Next, description will be made for the heat storage method to the
heat storage unit 1. - Steam passes through the pipe from the
factory 60 and is taken into theheat exchanger 5 a. On the other hand, theoil 2 a in theheat storage container 1 a is taken into theheat exchanger 5 a via thedischarge pipe 6. Then, in theheat exchanger 5 a, heat of the steam is supplied to theoil 2 that was taken in. After that, theoil 2 a to which heat was supplied is supplied to thesupply pipe 11, and flows through thefirst supply pipe 15 and thesecond supply pipe 16. Theoil 2 a flowing through thefirst supply pipe 15 is discharged from theoutlet 15 a into theoil 2. Further,oil 2 a flowing through thesecond supply pipe 16 is discharged from the discharge holes 16 a into thesodium acetate 3. - Since the
sodium acetate 3 is solid at the starting point of heat storage, it becomes difficult for theoil 2 a to be discharged from the discharge holes 16 a and the outlets are clogged, and thus theoil 2 a cannot flow well through thesecond supply pipe 16. Then, there is a danger that the temperature ofoil 2 a is reduced while they are clogged. On the other hand, since theoutlet 15 a of thefirst supply pipe 15 is provided in theoil 2, theoil 2 a can constantly flow through thefirst supply pipe 15 regardless of the state of thesodium acetate 3 at the starting point of heat storage, and the high-temperature oil 2 a constantly flows in thefirst supply pipe 15. Therefore, heat is conducted to theoil 2 a in thesecond supply pipe 16 by contacting thefirst supply pipe 15 in which the high-temperature oil 2 a constantly flows, and high-temperature can be maintained without reducing temperature. With this, the high-temperature oil 2 a can be discharged from the discharge holes 16 a to thesodium acetate 3. Furthermore, high-temperature can be also maintained in thesecond supply pipe 16, and heat can be conducted to thesodium acetate 3 near thesecond supply pipe 16 as well. - Meanwhile, in this embodiment, the
supply pipes heat storage container 1 a, but they may not be arranged on the bottom surface. In this case, the disposing positions of the discharge holes 16 a are not limited as described above. In the case where thesupply pipes supply pipes - As described above, in this embodiment, since heat is conducted from the
supply pipe 15 to theoil 2 a discharged from the discharge holes 16 a, it is possible to constantly maintain high-temperature and the heat storage time can be shortened. Further, by arranging the supply pipes on the bottom surface of theheat storage container 1 a, the contact time of the dischargedoil 2 a and thesodium acetate 3 can be made longer. Then, although theoil 2 a goes up due to light specific gravity and it becomes difficult to store heat in thesodium acetate 3 in the lower portion, heat can be stored in theentire sodium acetate 3 by arranging the supply pipes on the bottom surface. - Furthermore, as a modified example of this embodiment, the
supply pipes FIG. 12 . By providing the pipes parallelly, it becomes possible to allow theoil 2 a and thesupply pipes sodium acetate 3 over a wider range, and the heat storage time can be made even shorter. In this case, it is preferable that a corrugated conduction plate 17 (thermal conduction member) be provided so as to join eachsupply pipe - The conduction plate 17 has a corrugated shape where circular arcs are oppositely joined alternately, the
second supply pipes 16 are fitted into the circular arc portions, they are closely adhered by welding or the like, and arranged on the bottom surface. With this, the contact area between thesecond supply pipe 16 and the conduction plate 17 becomes larger and heat quantity to be conducted to the conduction plate 17 becomes larger, and heat can be sufficiently conducted to thesodium acetate 3 between thesupply pipes supply pipes adjacent supply pipes - Further, as another modified example, as shown in
FIG. 13 andFIG. 14 , thesecond supply pipe 16 may cover approximately the entire bottom surface of theheat storage container 1 a and thefirst supply pipe 15 may be extended in thesecond supply pipe 16 covering the bottom surface. By arranging thesecond supply pipe 16 so as to approximately cover the bottom surface, heat can be conducted from the entire lower portion to thesodium acetate 3, and the heat storage time can be further shortened. Moreover, since thefirst supply pipe 15 is designed to pass through the entiresecond supply pipe 16, theoil 2 a in thesecond supply pipe 16 can be maintained at high-temperature. In this case, it is preferable that thefirst supply pipe 15 pass near the discharge holes 16 a. This makes it possible to maintain theoil 2 a to be discharged from the discharge holes 16 a at as high-temperature as possible, and the heat storage time can be shortened. - Furthermore, as another modified example, a separation device 14 (separation mechanism) as shown in
FIG. 15 may be provided between theoutlet 15 a of thefirst supply pipe 15 and thedischarge pipe 6. Theseparation device 14 is a device for separating theoil 2 and thesodium acetate 3 when thesodium acetate 3 is mixed into theoil 2 that was taken in. Theseparation device 14 has amain body 14 a (separator) that takes in theoil 2 containing thesodium acetate 3. Theoil 2 is filled in themain body 14 a, theoil 2 horizontally taken into the body flows horizontally in one direction, and then is discharged. Further, the bottom surface of themain body 14 a has a level surface and a tilt surface, where ahole 14 b for discharging thesodium acetate 3 is provided in the level surface. Although described later, since the bottom surface has the tilt surface, thesodium acetate 3 to be precipitated is guided toward thehole 14 b. - When the
oil 2 contains thesodium acetate 3, thesodium acetate 3 having a larger specific gravity than that of theoil 2 precipitates while horizontally flowing in themain body 14 a. The precipitatedsodium acetate 3 is discharged from thehole 14 b. Further, since the bottom surface of themain body 14 a has the tilt surface, thesodium acetate 3 precipitated on the tilt surface also moves toward thehole 14 b in a sliding manner to be discharged from thehole 14 b. By providing theseparation device 14 between theoutlet 15 a and thedischarge pipe 6, thesodium acetate 3 is not contained in theoil 2 a any more. In addition, even in the case where thesodium acetate 3 is contained, thesodium acetate 3 can be precipitated and removed, so that a danger of failure or the like caused when thesodium acetate 3 enters theheat exchanger 5 a is eliminated. Note that theseparation device 14 may be provided halfway thedischarge pipe 6. - The present invention is described in the above-described preferred embodiments, but the present invention is not limited only to them. It should be understood that other various embodiments can be implemented without departing from the spirit and scope of the present invention. Furthermore, operations and effects by the constitution of the present invention are described in these embodiments, but these operations and effects are only examples and do not limit the present invention.
-
FIG. 1 An entire schematic view of the heat transportation system of the present invention -
FIG. 2 A sectional view of the heat storage unit according to the first embodiment of the present invention -
FIG. 3 A modified example of the heat storage unit according to the first embodiment -
FIG. 4 Another modified example of the heat storage unit according to the first embodiment -
FIG. 5 Another modified example of the heat storage unit according to the first embodiment -
FIG. 6 Another modified example of the heat storage unit according to the first embodiment -
FIG. 7 A sectional view of the heat storage unit according to the second embodiment of the present invention -
FIG. 8 A sectional view of the heat storage unit according to the third embodiment of the present invention -
FIG. 9 A sectional view on IX-IX line ofFIG. 8 -
FIG. 10 A sectional view on X-X line ofFIG. 8 -
FIG. 11 A sectional view of the heat storage unit according to the fourth embodiment of the present invention -
FIG. 12 A modified example of the heat storage unit according to the fourth embodiment and a sectional view on XII-XII line ofFIG. 11 -
FIG. 13 Another modified example of the heat storage unit according to the fourth embodiment and a sectional view on XIII-XIII line ofFIG. 11 -
FIG. 14 Another modified example of the heat storage unit according to the fourth embodiment and a sectional view on XIV-XIV line ofFIG. 11 -
FIG. 15 Another modified example of the heat storage unit according to the fourth embodiment and an enlarged sectional view of a separation device - 1 Heat Storage Unit
- 1 a Heat storage container
- 2 Oil
- 2 a Oil (to which heat is supplied)
- 3 Sodium acetate
- 4 Supply pipe
- 4 a, 4 b Discharge hole
- 5 a, 5 b Heat exchanger
- 6 Discharge pipe
Claims (29)
1. A heat storage unit comprising:
a storage container that houses a heat storage body, which stores heat by a state change from solid to liquid, and a heat exchange medium, which exchanges heat by directly contacting said heat storage body, has a smaller specific gravity than that of said heat storage body, and is separated from said heat storage body;
a supply pipe that passes through at least said heat storage body housed in said storage container and supplies said heat exchange medium into the storage container; and
a discharge pipe that discharges said heat exchange medium housed in said storage container to the outside of said storage container, wherein
said supply pipe crosses a boundary surface between said heat exchange medium and said heat storage body housed in said storage container, has a plurality of discharge holes that discharge said supplied heat exchange medium, and
at least one of said discharge holes is positioned inside said heat exchange medium.
2. The heat storage unit according to claim 1 , wherein
said supply pipe crosses vertically with respect to said boundary surface.
3. The heat storage unit according to claim 2 , wherein
said supply pipe is disposed coaxially around the circumference of an area having said discharge holes and has a circulation pipe to allow said heat exchange medium discharged from said discharge holes to go up in the vertical direction.
4. The heat storage unit according to claim 1 , wherein
in the case where said supply pipe or at least a part of said first supply pipe extends in the horizontal direction,
said discharge holes are provided for an area extending in the horizontal direction such that the holes are open in the vertically downward direction.
5. The heat storage unit according to claim 1 , wherein
in said heat storage body,
said supply pipe or said first supply pipe has an expanded portion that is in a shape that widens toward the end and provided with said discharge holes on the bottom surface.
6. The heat storage unit according to claim 1 , wherein
a connection port of said supply pipe is positioned above a connection port of said discharge pipe.
7. The heat storage unit according to claim 1 , comprising:
wave-absorbing plates that are parallelly arranged with each other along the boundary surface between said heat storage body and said heat exchange medium and arranged vertically with respect to said boundary surface, and prevents agitation on said boundary surface.
8. The heat storage unit according to claim 1 , wherein
said discharge pipe includes a separation mechanism that separates said heat storage body and said heat exchange medium.
9. The heat storage unit according to claim 8 , wherein
said separation mechanism has a separator for allowing said heat exchange medium and said heat storage body, which were taken in, to flow horizontally in one direction and a discharge hole that discharges said heat storage body, which is being precipitated, from said separator, and
said separator has a shape for guiding said precipitated heat storage body toward said discharge hole.
10. The heat storage unit according to claim 1 , wherein
said heat storage body is erythritol.
11. A heat storage unit comprising:
a storage container that houses a heat storage body, which stores heat by a state change from solid to liquid, and a heat exchange medium, which exchanges heat by directly contacting said heat storage body, has a smaller specific gravity than that of said heat storage body, and is separated from said heat storage body;
a supply pipe that passes through at least said heat storage body housed in said storage container and supplies said heat exchange medium into the storage container; and
a discharge pipe that discharges said heat exchange medium housed in said storage container to the outside of said storage container, wherein
said supply pipe includes:
a first supply pipe having discharge holes that discharge said supplied heat exchange medium into said heat storage body; and
a second supply pipe that crosses the boundary surface between said heat exchange medium and said heat storage body, which are housed in said storage container, and has an outlet that discharges said supplied heat exchange medium into the heat exchange medium.
12. The heat storage unit according to claim 11 , wherein
in said heat storage body,
said second supply pipe surrounds at least a part of said first supply pipe including said discharge holes and has a communicating portion that guides said discharge holes to said heat exchange medium.
13. The heat storage unit according to claim 11 , wherein
a switching valve for switching supply and cutoff of said heat exchange medium depending on the state of said heat storage body is provided severally for said first and second supply pipes.
14. The heat storage unit according to claim 11 , wherein
in the case where said supply pipe or at least a part of said first supply pipe extends in the horizontal direction,
said discharge holes are provided for an area extending in the horizontal direction such that the holes are open in the vertically downward direction.
15. The heat storage unit according to claim 11 , wherein
in said heat storage body,
said supply pipe or said first supply pipe has an expanded portion that is in a shape that widens toward the end and provided with said discharge holes on the bottom surface.
16. The heat storage unit according to claim 11 , wherein
a connection port of said supply pipe is positioned above a connection port of said discharge pipe.
17. The heat storage unit according to claim 11 , wherein
wave-absorbing plates that are parallelly arranged with each other along the boundary surface between said heat storage body and said heat exchange medium and arranged vertically with respect to said boundary surface, and prevents agitation on said boundary surface.
18. The heat storage unit according to claim 11 , wherein
said discharge pipe includes a separation mechanism that separates said heat storage body and said heat exchange medium.
19. The heat storage unit according to claim 18 , wherein
said separation mechanism has a separator for allowing said heat exchange medium and said heat storage body, which were taken in, to flow horizontally in one direction and a discharge hole that discharges said heat storage body, which is being precipitated, from said separator, and
said separator has a shape for guiding said precipitated heat storage body toward said discharge hole.
20. The heat storage unit according to claim 11 , wherein
said heat storage body is erythritol.
21. A heat storage unit comprising:
a storage container that houses a heat storage body, which stores heat by a state change from solid to liquid, and a heat exchange medium, which exchanges heat by directly contacting said heat storage body, has a smaller specific gravity than that of said heat storage body, and is separated from said heat storage body;
a supply pipe that passes through at least said heat storage body housed in said storage container and supplies said heat exchange medium into said storage container; and
a discharge pipe that discharges said heat exchange medium housed in said storage container to the outside of said storage container, wherein
said supply pipe includes:
a first supply pipe having an outlet that discharges said supplied heat exchange medium into said heat exchange medium housed in said storage container housed in said storage container; and
a second supply pipe that has at least a part of said first supply pipe inside the pipe and has discharge holes that discharge said supplied heat exchange medium into said heat storage body.
22. The heat storage unit according to claim 21 , wherein
in the case where said supply pipes are provided parallelly in said heat storage body,
a thermal conduction member for conducting heat of said supply pipes is provided.
23. The heat storage unit according to claim 22 , wherein
at least a part of said supply pipe is provided on the bottom surface of
said storage container.
24. The heat storage unit according to claim 21 , wherein
said second supply pipe is provided on the bottom surface of said storage container so as to cover said bottom surface.
25. The heat storage unit according to claim 21 , wherein
a connection port of said supply pipe is positioned above a connection port of said discharge pipe.
26. The heat storage unit according to claim 21 , comprising:
wave-absorbing plates that are parallelly arranged with each other along the boundary surface between said heat storage body and said heat exchange medium and arranged vertically with respect to said boundary surface, and prevents agitation on said boundary surface.
27. The heat storage unit according to claim 21 , wherein
said discharge pipe includes a separation mechanism that separates said heat storage body and said heat exchange medium.
28. The heat storage unit according to claim 27 , wherein
said separation mechanism has a separator for allowing said heat exchange medium and said heat storage body, which were taken in, to flow horizontally in one direction and a discharge hole that discharges said heat storage body, which is being precipitated, from said separator, and
said separator has a shape for guiding said precipitated heat storage body toward said discharge hole.
29. The heat storage unit according to claim 21 , wherein
said heat storage body is erythritol.
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
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JP2003402457 | 2003-12-02 | ||
JP2003-40257 | 2003-12-02 | ||
JP2004116574A JP4469208B2 (en) | 2003-12-02 | 2004-04-12 | Heat storage unit |
JP2004-116574 | 2004-04-12 | ||
PCT/JP2004/017834 WO2005054767A1 (en) | 2003-12-02 | 2004-12-01 | Heat storage unit |
Publications (1)
Publication Number | Publication Date |
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US20070079951A1 true US20070079951A1 (en) | 2007-04-12 |
Family
ID=34656195
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US10/580,048 Abandoned US20070079951A1 (en) | 2003-12-02 | 2004-12-01 | Heat storage unit |
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US (1) | US20070079951A1 (en) |
EP (1) | EP1693636B1 (en) |
JP (1) | JP4469208B2 (en) |
CA (1) | CA2546687C (en) |
WO (1) | WO2005054767A1 (en) |
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JP4494375B2 (en) * | 2006-08-11 | 2010-06-30 | 株式会社神鋼環境ソリューション | Heat transport system |
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JP4680941B2 (en) * | 2007-01-11 | 2011-05-11 | 株式会社神鋼環境ソリューション | Heat storage |
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- 2004-12-01 CA CA2546687A patent/CA2546687C/en not_active Expired - Fee Related
- 2004-12-01 WO PCT/JP2004/017834 patent/WO2005054767A1/en not_active Application Discontinuation
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US7654306B2 (en) * | 2005-08-05 | 2010-02-02 | Kabushiki Kaisha Kobe Seiko Sho | Heat-storage unit and operation method of heat-storage unit |
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Also Published As
Publication number | Publication date |
---|---|
JP4469208B2 (en) | 2010-05-26 |
EP1693636A4 (en) | 2012-12-19 |
CA2546687C (en) | 2010-02-16 |
CA2546687A1 (en) | 2005-06-16 |
EP1693636A1 (en) | 2006-08-23 |
WO2005054767A1 (en) | 2005-06-16 |
JP2005188916A (en) | 2005-07-14 |
EP1693636B1 (en) | 2015-02-11 |
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Owner name: KABUSHIKI KAISHA KOBE SEIKO SHO, JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:TAKAHASHI, KAZUO;YAGI, HIROMIKI;HIGASHI, YASUO;AND OTHERS;REEL/FRAME:017934/0531 Effective date: 20060301 |
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