JP4494375B2 - Heat transport system - Google Patents

Description

  The present invention relates to a heat transport system and a heat transport method that can store generated heat and transport heat to a remote location.

  Heat generated in factories, for example, steelworks and garbage disposal sites, is used in various facilities near the factories. Moreover, the heat generated in the factory can be temporarily stored in a heat storage body or the like, and the heat storage body can be transported so that the heat can be used even in a place away from the factory. As a device for storing heat, Patent Document 1 discloses a technique related to a heat storage device that uses latent heat of fusion of a heat storage body.

  The storage container (heat storage container) of the heat storage device disclosed in Patent Document 1 contains a heat storage body such as erythritol and oil (heat exchange medium) having a specific gravity smaller than that of the heat storage body. Since the heat storage body in the heat storage state is in a molten state, the heat storage body is separated and stored in the upper and lower directions without mixing with oil having a specific gravity smaller than that of the heat storage body. The storage container is provided with a supply pipe and a discharge pipe that constitute a circulation passage for circulating only oil, and the circulation passage is thermally connected to the heat exchanger. The oil flows through the circulation passage and is supplied with heat by the heat exchanger, and is sent below the heat storage body in the state where the heat is supplied. Since the sent oil has a small specific gravity, it rises above the heat storage body. During this rise, heat exchange is performed by direct contact between the heat storage body and the oil, and the heat of the oil is supplied to the heat storage body. By repeating the above operation, heat storage to the heat storage body is performed.

  On the other hand, when recovering and using the heat stored in the heat storage body, oil that is not supplied with heat is sent below the heat storage body. And while the sent-in oil rises in the heat storage body, heat exchange is performed by direct contact between the heat storage body and the oil, and the heat stored in the heat storage body is supplied to the rising oil. And in the heat exchanger provided separately, the heat | fever of the oil supplied with heat as mentioned above can be collect | recovered. By repeating the above operation, the heat stored in the heat storage body can be recovered and used.

Since the storage container is transportable by a truck or the like, even if the factory that generates heat and the facility such as a hot water pool that uses the heat are separated from each other, the heat is stored. Heat transport can be performed by transporting the storage container in which the heat storage body in the heated state is accommodated. In addition, by using the heat stored in the storage container, CO ₂ emission as a global warming gas can be reduced in a facility such as a hot water pool that uses heat.
JP 2005-188916 A

  In the technique disclosed in Patent Document 1, when transporting a storage container (heat storage container) in a state where heat is stored, both oil (heat exchange medium) and heat storage material stored in the storage container are transported. It has become. Here, the heat storage material has a large amount of heat storage because heat storage is performed using heat of fusion (amount of heat necessary to melt 1 kg of solid to form a liquid at the same temperature, corresponding to latent heat). For example, in the case of erythritol, the heat of fusion is 76 kcal / kg, and the specific heat (the amount of heat required to raise the temperature of 1 kg of the substance by 1 ° C.) is about 0.7 kcal / kg ° C. Here, in the case of a heat storage material, both heat of fusion and specific heat can be used for heat storage. On the other hand, in the heat exchange medium, the heat of fusion cannot be used for heat storage, and heat storage is performed using only the specific heat (0.5 to 0.6 kcal / kg ° C.). The contribution to heat storage is small compared to heat storage materials. Therefore, by transporting the heat exchange medium together with the heat storage material, the weight of the heat exchange medium having a small contribution to the heat storage is increased, thereby increasing the transportation cost of the storage container (heat storage container).

  Then, an object of this invention is to provide the heat transport system and heat transport method which can transport a thermal storage container at low cost.

Means and effects for solving the problems

  In order to achieve the above object, the heat transport system of the present invention performs heat exchange by contacting the heat storage body with a heat storage body that stores heat by latent heat storage, and has a smaller specific gravity than the heat storage body and the heat storage body. Is a heat exchange medium to be separated, a heat storage container that contains the heat storage body and the heat exchange medium, and the heat exchange medium is circulated and communicated with the inside of the heat storage container, and the heat exchange A circulation passage thermally connected to a heat source for supplying heat to the medium, storage means for taking out and storing the heat exchange medium from the heat storage container, and supplying the stored heat exchange medium to the heat storage container; The heat storage container is transportable.

  According to this configuration, a heat storage container in a state where the heat exchange medium is taken out and stored from the heat storage container after the heat exchange medium is circulated to store heat, and the specific heat is small and hardly contributes to heat storage. The heat stored can be utilized by supplying and circulating a separately stored heat exchange medium in the heat storage container at the transport destination of the heat storage container. Thereby, since the weight of a heat exchange medium can be reduced in transportation of a thermal storage container, the heat transportation system which can transport a thermal storage container at low cost is obtained.

  In the storage unit, an extraction port and a supply port for the heat exchange medium may be provided in the heat storage container. According to this, a heat transport system capable of transporting the heat storage container at a low cost with a simple configuration is obtained by taking out the heat exchange medium directly from the heat storage container.

  In the storage means, the heat exchange medium outlet and supply port may be provided in the middle of the circulation passage. According to this, the heat exchange medium can be efficiently recovered by taking out the heat exchange medium flowing through the circulation passage from the middle of the circulation passage.

  The storage means may be provided with a heating mechanism for heating and keeping the stored heat exchange medium. According to this, since the fall of the temperature of a heat exchange medium can be prevented, the heat loss at the time of supplying and using the heat exchange medium collect | recovered and stored again to a thermal storage container can be reduced.

In the storing means, outlet of the heat exchange medium, is provided on the lower stream side of the heat source to a middle of said circulation passage, and a supply port of the heat exchange medium, the circulation passage it may be provided on the upper stream side of the heat source even during the. According to this, the heat exchange medium can be efficiently recovered by taking out the heat exchange medium flowing through the circulation passage in the middle of the circulation passage. Furthermore, since the temperature reduction of the heat exchange medium can be prevented without providing a separate heating mechanism, the heat loss when the recovered and stored heat exchange medium is supplied to the heat storage container again and used efficiently. Can be reduced.

The heat storage body may be erythritol. According to this, a heat transport system with a large heat storage amount can be obtained by using erythritol having a high heat of fusion.

  Moreover, in order to achieve said objective, the heat transport method of this invention is the heat storage body which stores heat by the latent heat storage which heat-exchanges by mutually contacting, and specific gravity is smaller than the said heat storage body, and the said heat storage body A heat exchange medium to be separated is housed in a heat storage container, is formed in communication with the heat storage container, and is internally connected to a heat source for supplying heat to the heat exchange medium. The heat exchange medium circulates and circulates the heat storage step in which heat is stored in the heat storage body, the heat exchange medium extraction step in which the heat exchange medium is taken out from the heat storage container and stored, and the heat storage container is transported And a transportation process.

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

(First embodiment)
First, the heat transport system according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 2. 1 and 2 are schematic views showing the overall configuration of the heat transport system according to the first embodiment of the present invention. FIG. 1 shows a heat storage side of the heat transport system, and FIG. 2 shows a heat dissipation side of the heat transport system. Yes.

(overall structure)
In the heat transport system 1 according to the present embodiment, for example, as shown in FIGS. 1 and 2, a factory (heat source) 80 that generates heat and a facility (heat utilization mechanism) 85 that uses the heat are separated from each other. Applicable to the case. First, the outline | summary about the thermal storage to the thermal storage container 1a is demonstrated, referring FIG. The heat transport system 1 includes a portable heat storage container 1a that stores a heat storage body and a heat exchange medium (described later), and a circulation passage 4a for the heat exchange medium. In this case, the heat storage container 1a of the heat transport system 1 is detachably connected to the heat exchanger 5a via the connection ports 51 and 52, and the heat storage container 1a having completed heat storage (heat storage completed) is It is mounted on the loading platform 50b of the transport mechanism 50 such as a truck and transported from the factory 80 to the facility 85. The factory 80 is specifically an ironworks or the like, and may be a garbage incinerator or a power plant. The heat discharged there is stored in the heat storage container 1a through the heat exchanger 5a and the heat exchange medium. The heat exchanger 5a is for conducting the heat of the factory 80 to the heat exchange medium flowing through the circulation passage 4a. When transporting the heat storage container 1a, the heat exchange medium is taken out from the heat storage container 1a and stored in a storage tank 7b provided separately from the heat storage container 1a. After the heat storage of one heat storage container 1a is completed, by connecting the connection port of the unheated heat storage container 1a that is waiting to the connection ports 51 and 52 with the heat exchanger 5a, the next non-heat storage state Similarly, heat storage is performed on the heat storage container 1a. In this way, the heat of the factory 80 can be stored in the heat storage container 1a sequentially.

  Next, an outline of utilization of heat stored in the heat storage container 1a (hereinafter referred to as heat dissipation) will be described with reference to FIG. In this case, the heat transport system 1 further includes a heat radiation side circulation passage 4b. In addition, the heat storage container 1a of the heat transport system 1 is detachably connected to the heat exchanger 5b via connection ports 53 and 54, and the heat storage container 1a that has completed heat radiation is a transport mechanism such as a truck. 50, it is transported from the facility 85 to the factory 80. The facility 85 is a facility such as a hot water pool or a hospital, and the heat stored in the heat storage container 1a is dissipated through the heat exchange medium and the heat exchanger 5b, so that it can be applied to the temperature control equipment in the facility 85. Is done. The heat exchanger 5b is for conducting heat accumulated in the heat storage container 1a to the facility 85. During heat dissipation of the heat storage container 1a, the heat exchange medium (separately prepared in the facility 85) stored in the storage tank 7b 'having the same configuration as the storage tank 7b is supplied to the heat storage container 1a. In this state, the heat storage body and the heat exchange medium are accommodated. After the heat dissipation of one heat storage container 1a is completed, the connection port of the next heat storage container 1a that has been waiting is connected to the connection ports 53 and 54 with the heat exchanger 5b. Heat can be used. Thus, in the facility 85, the heat stored in the heat storage container 1a can be radiated and used.

  Next, a specific configuration of the heat transport system 1 will be described with reference to FIGS. 3 and 4. FIG. 3 shows the heat storage side of the heat transport system, and FIG. 4 shows the heat release side of the heat transport system. Hereinafter, the configurations of the heat storage side (see FIG. 3) and the heat dissipation side (see FIG. 4) will be described in parallel.

(Heat storage container)
During heat storage and heat dissipation, oil (heat exchange medium) 2 and erythritol (heat storage body) 3 are accommodated in the heat storage container 1a. The heat storage container 1a is connected to a heat storage side circulation passage 4a (during heat storage) and a heat radiation side circulation passage 4b (during heat dissipation). The circulation passages 4a and 4b each include a supply pipe 6 and a discharge pipe 4, and are formed in communication with the heat storage container 1a. Therefore, the oil 2 which is a heat exchange medium can circulate and circulate through the circulation passages 4a and 4b while passing through the heat storage container 1a. Further, the heat storage container 1a can be transported by the transport mechanism 50 in a state where the supply pipe 6 and the discharge pipe 4 are attached to the heat storage container 1a. Although details will be described later, the heat storage side circulation passage 4a is thermally connected to the factory 80, and the heat radiation side circulation passage 4b is thermally connected to the facility 85, respectively. Moreover, the connection port 71 for connecting the storage mechanism 7 of the oil 2 mentioned later is provided in the thermal storage container 1a.

(Heat exchange medium (oil))
The oil 2 used as a heat exchange medium in this embodiment performs heat exchange with the erythritol 3 by direct contact with the erythritol 3. At the time of heat storage, the oil 2 passes through the discharge pipe 4 of the circulation passage 4a and the heat exchanger side pipe 5c, is supplied with heat in the heat exchanger 5a, and then passes through the supply pipe 6 of the circulation passage 4a to enter the erythritol 3 (In the following description, the oil 2 supplied with heat by the heat exchanger 5a at the time of heat storage is particularly oil 2a, and the oil 2 supplied with heat from the erythritol 3 at the heat storage container 1a at the time of heat dissipation is particularly oil 2b. ). Since the discharged oil 2 a has a specific gravity smaller than that of erythritol 3, it rises to the position of the upper oil 2 and is taken into the oil 2. During this rise, the heat of the oil 2 a is conducted to the erythritol 3 by direct contact with the erythritol 3. Further, when radiating heat, the oil 2 passes through the discharge pipe 4 and the heat exchanger side pipe 5c of the heat radiating side circulation passage 4b, radiates heat in the heat exchanger 5b, and then passes through the supply pipe 6 of the heat radiating side circulation path 4b. It is discharged into erythritol 3. Since the discharged oil 2 (after heat dissipation) has a specific gravity smaller than that of erythritol 3, it rises to the position of the upper oil 2 and is taken into the oil 2. During this rise, the heat stored in the erythritol 3 is conducted to the oil 2 by direct contact with the erythritol 3.

(Heat storage body (erythritol))
The erythritol 3 stores the heat conducted from the oil 2a when storing heat. Moreover, at the time of heat dissipation, heat is conducted to the oil 2 after heat dissipation. The melting point of erythritol 3 is about 121 degrees, and it is a solid during normal times (at room temperature). Then, heat is conducted from the oil 2a by direct contact, so that the state changes from solid to liquid, and heat is stored in the liquid state. That is, erythritol 3 stores heat using latent heat storage. On the other hand, since erythritol 3 dissipates heat when the state changes from liquid to solid, heat can be taken out. Here, since the heat of fusion is as high as 76 kcal / kg, erythritol is desirable as a heat storage body because of its large heat storage amount. Here, erythritol is used, but as the heat accumulator, those having a large heat of fusion (latent heat) such as sodium acetate (heat of fusion: 63 kcal / kg), sugar alcohols and the like can be used.

(Oil and erythritol)
The oil 2 and the erythritol 3 are not mixed with each other, and the oil 2 has a specific gravity smaller than that of the erythritol 3, so that the oil 2 is stored in the upper layer and the erythritol 3 is stored in the lower layer in the heat storage container 1a. In addition, since the oil 2 and the erythritol 3 are not mixed with each other, no member or the like is provided between the oil 2 and the erythritol 3 so that the oil 2 and the erythritol 3 are in direct contact with each other. .

  As described above, the heat storage container 1a is in a state of containing the erythritol 3 and the oil 2 during heat storage and heat dissipation. When the heat storage container 1a is transported, the heat storage container 1a contains the erythritol 3 after heat storage or heat dissipation, and the oil 2 is taken out from the heat storage container 1a by the storage mechanism 7 described later. It has become.

(Circulation passage)
The circulation path 4a on the heat storage side is composed of a discharge pipe 4, a heat exchanger side pipe 5c, and a supply pipe 6 (see FIG. 3). Further, the heat radiation side circulation passage 4b is constituted by a discharge pipe 4, a heat exchanger side pipe 5d, and a supply pipe 6 (see FIG. 4). These circulation passages 4a and 4b are formed in communication with the heat storage container 1a as described above. The exhaust pipe 4 is provided so as to penetrate from the outside to the inside of the heat storage container 1a, and the exhaust pipe 4 penetrating the upper part of the heat storage container 1a where the oil 2 is located in a state where the oil 2 is accommodated. Has been placed. The oil 2 can be taken into the circulation passages 4a and 4b from the pipe end hole 4h. The supply pipe 6 is also provided so as to penetrate from the outside to the inside of the heat storage container 1a. The feed pipe 6 that penetrates the erythritol is provided in the lower layer portion of the heat storage container 1a where the erythritol 3 accommodated in the heat storage container 1a is located. 3 is in contact with. Further, the supply pipe 6 has a plurality of supply holes 6 h for discharging the oil 2 flowing through the inside thereof at a portion in contact with the erythritol 3. And the connection ports 41 and 61 of the discharge pipe 41 and the supply pipe 61 are connected to the connection ports 51 and 52 (or the connection ports 53 and 54 to the heat dissipation side heat exchanger 5b) with the heat storage side heat exchanger 5a. It is detachably connected. The circulation passages 4a and 4b are provided with pumps (forced circulation mechanisms) 4p and 4q, respectively, and the oil 2 circulates inside the circulation passages 4a and 4b by the action of the pumps 4p and 4q. Therefore, the oil 2 in the heat storage container 1a can be sent to the heat storage side heat exchanger 5a (heat radiation side heat exchanger 5b). In the present embodiment, a pump is used as the forced flow mechanism of the oil 2, but other than the pump may be used as long as the oil 2 can be circulated and circulated in the circulation passage.

  Since the circulation passages 4a and 4b are configured as described above, during heat storage, the oil 2 inside the heat storage container 1a passes through the discharge pipe 4 and is sent to the heat exchanger side pipe 5c to be supplied with heat. Then, it is again sent into the heat storage container 1a through the supply pipe 6. Further, at the time of heat dissipation, the oil 2a inside the heat storage container 1a passes through the discharge pipe 4 and is sent to the heat exchanger side pipe 5d to dissipate heat, and then passes through the supply pipe 6 and is sent again into the heat storage container 1a. .

(Heat exchanger)
As shown in FIG. 3, the heat exchanger 5a on the heat storage side is for conducting heat generated in the factory 80 to the oil 2 flowing in the circulation passage 4a. As described above, the discharge pipe 4 and the supply pipe 6 are detachably connected to the heat exchanger side pipe 5c at the connection ports 51 and 52. And the heat exchanger side pipe 5c is installed so that the inside of the heat exchanger 5a may be passed. On the other hand, the heat discharged from the factory 80 is sent from the upstream exhaust heat pipe 80a into the heat exchanger 5a by a heat medium such as high-temperature steam or air. The heat sent through a heat medium such as steam or air is conducted to the oil 2 by exchanging heat in the heat exchanger 5a. A heat medium such as steam from which heat has been removed by the heat exchange side pipe 5c and the oil 2 is discharged from the downstream side exhaust heat pipe 80b. Therefore, it can be said that the factory (heat source) 80 and the circulation passage 4a are thermally connected. Further, the oil 2 taken into the heat exchanger 5a is fed into the heat storage container 1a by the action of the pump 4p disposed in the middle of the circulation passage 4a. The heat exchanger 5a repeats the above operation so that heat generated in the factory 80 can be stored in the erythritol 3 of the heat storage container 1a.

  Moreover, as shown in FIG. 4, the heat exchanger 5b on the heat radiation side is for transmitting the heat stored in the heat storage container 1a to the facility 85. As described above, the discharge pipe 4 and the supply pipe 6 are detachably connected to the heat exchanger side pipe 5d at the connection ports 53 and 54. The heat exchanger side pipe 5d is installed so as to pass through the inside of the heat exchanger 5b. And heat exchanger 5b takes in oil 2b supplied with heat stored in erythritol 3 of heat storage container 1a from the heat storage container 1a side. On the other hand, the heat exchanger 5b takes in a heat medium for conducting heat to the facility 85 from the facility 85 side. Here, the heat exchanger side pipe 5d through which the taken-in oil 2b flows and the pipe 85a through which the heat medium flows are provided so as to be in contact with each other, and these pipes are formed from members having high thermal conductivity. Therefore, the heat of the oil 2b is indirectly conducted to the heat medium through the wall of the pipe 85a. Then, the heat medium given heat is sent to the facility 85 through the pipe 85a. From the above, it can be said that the facility 85 and the circulation passage 4b are thermally connected. Further, the oil 2 taken into the heat exchanger 5b is fed into the heat storage container 1a by the action of the pump 4q disposed in the middle of the circulation passage 4b. Thus, the heat recovered in the heat exchanger 5b is used in the facility 85.

(Storage mechanism)
The heat storage container 1a is provided with a storage mechanism (storage means) 7 (see FIG. 3). By the action of the storage mechanism 7, when the heat storage container 1a is transported (when heat storage is completed), the oil 2 is taken out from the heat storage container 1a and stored in the storage tank 7b. Thereby, the oil 2 having a small specific heat and hardly contributing to the heat storage is taken out and stored, and the wasteful weight corresponding to the oil 2 is omitted, so that the transportation cost can be reduced. In addition, when the heat stored in the heat storage container 1a is used (at the time of heat release), the oil 2 is supplied to the heat storage container 1a by the action of the storage mechanism 7.

  The storage mechanism 7 includes a pipe 7a, a storage tank 7b, and a pump 7p. Here, the pipe 7a is detachably connected to the heat storage container 1a at the connection port 71. The pipe 7a is commonly used for both taking out the oil 2 from the heat storage container 1a and supplying the oil 2 to the heat storage container 1a, and the connection port 71 also serves as the oil 2 take-out port and supply port. ing. When the heat storage container 1a is transported by the suction force of the pump 7p provided in the middle of the pipe 7a, the oil 2 is taken out from the heat storage container 1a and connected to the tip of the pipe 7a via the pipe 7a. Is stored. And at the time of heat dissipation of the heat storage container 1a, the oil 2 stored in the storage tank 7b is supplied to the heat storage container 1a via the pipe 7a by the pushing force of the pump 7p. The configurations of the storage mechanism 7 ′, the pipe 7a ′, the storage tank 7b ′, and the pump 7p ′ illustrated in FIG. 4 are the configurations of the storage mechanism 7, the pipe 7a, the storage tank 7b, and the pump 7p of FIG. Is the same.

(Heat transport method)
Next, a heat transport method by the heat transport system 1 will be described with reference to the flowcharts of FIGS. FIG. 5 shows a flowchart in the heat storage stage, and FIG. 6 shows a flowchart in the heat dissipation stage.

(Heat storage stage)
First, in the heat storage step, heat is stored in the heat storage container 1a (step S101 in FIG. 5). At this time, the heat storage container 1a is in a state where oil 2 as a heat exchange medium is injected and supplied in advance. In the heat storage process, the oil 2 circulates and circulates in the circulation passage 4a, and the circulation passage 4a is thermally connected to the factory 80 that is a heat source and the heat exchanger 5a. The heat discharged as steam from 80 is conducted to the oil 2 in the heat exchanger 5a.

  The oil 2a supplied with heat passes through the heat exchanger side pipe 5c and the supply pipe 6 of the circulation passage 4a and is supplied from the supply hole 6h to the lower layer portion of the heat storage container 1a where the erythritol 3 is located. Here, since the specific gravity of the oil 2a is smaller than that of the erythritol 3, the oil 2a is in direct contact with the erythritol 3 when introduced into the lower layer portion of the heat storage container 1a from the supply hole 6h of the circulation passage 4a. It rises to the upper layer part of the heat storage container 1a. At this time, the heat of the oil 2a is supplied to the erythritol 3 because the erythritol 3 is in direct contact with the hot oil 2a.

  Then, the oil 2 that has supplied heat to the erythritol 3 flows from the pipe end hole 4h of the discharge pipe 4 into the discharge pipe 4 of the circulation passage 4a. And it is sent to the discharge pipe 4 and the heat exchanger side pipe 5c, where the heat discharged from the factory 80 is conducted to the oil 2 and supplied with heat. In the heat storage process, heat storage is performed as described above.

  Next, it is determined whether or not the heat storage in erythritol 3 has been completed (step S102). Specifically, for example, a method of determining the average temperature of erythritol 3 and determining that the heat storage is completed when the average temperature exceeds a certain reference value can be considered. Other determination methods may be used. Thereby, if heat storage is not yet completed, a heat storage process is repeated again (step S101). Thus, by repeating the heat storage process, the heat generated in the factory 80 can be sufficiently stored in the heat storage container 1a. On the other hand, if it is determined that the heat storage has been completed, the heat storage process ends and the next process is performed.

  Next, in the heat exchange medium extraction step, the oil 2 that is a heat exchange medium is extracted (step S103). Here, the oil 2 inside the heat storage container 1 a is taken out by the storage mechanism 7. Specifically, the oil 2 is taken out of the heat storage container by the suction force of the pump 7p and stored in the storage tank 7b connected to the tip of the pipe 7a via the pipe 7a.

  Next, it is determined whether or not the heat exchange medium extraction is completed (step S104). Specifically, for example, a method of determining the recovery amount of the oil 2 in the storage tank 7b and determining that the extraction is completed when the oil 2 exceeds a certain reference value can be considered. Other determination methods may be used. Thereby, if the heat exchange medium extraction is not yet completed, the heat exchange medium extraction process is repeated again (step S103). On the other hand, if it is determined that the heat exchange medium extraction has been completed, the heat exchange medium extraction process ends, and the next process is performed.

  Next, in the transport process, the heat storage container 1a is transported (step S105). This is performed by a transport mechanism 50 such as a truck equipped with a heat storage container 1a that has completed heat storage. The heat storage container 1a is transported from the factory 80 to a facility 85 where heat is used. Here, the transport mechanism 50 is not limited to a land traveling vehicle such as a truck, and may be a ship or an aircraft. The heat storage container 1a is transported after the connection at the connection ports 51 and 52 and the connection port 71 is released. As described above, heat storage and transportation of the heat storage container 1a are performed. Thereafter, the stored oil 2 can be poured into the next heat storage container 1a waiting (see FIG. 1) to further store heat in the heat storage container 1a.

(Heat release stage)
Next, the heat radiation stage will be described. In the heat dissipation stage, the heat stored in the heat storage container 1a is collected and used in the facility 85. First, in the connection ports 53 and 54 and the connection port 71, the heat exchanger side pipe 5d and the pipe 7a ′ are connected to the heat storage container 1a carried into the facility 85 by the transportation process. Here, in the initial state, since the heat storage container 1a transported by the transport mechanism is in a state in which the oil 2 is taken out by the storage mechanism 7, first, in the heat exchange medium injection process, A certain oil 2 is supplied to the heat storage container 1a (step S201 in FIG. 6). Here, the supply of the stored oil 2 is performed by a storage mechanism 7 ′ (the configuration is the same as that of the storage mechanism 7) different from the storage mechanism 7 used in the heat storage stage. Here, the storage mechanism 7 ′ and the oil 2 are separately prepared in the facility 85.

  Next, it is determined whether or not the injection of the oil 2 as the heat exchange medium has been completed (step S202). Specifically, for example, a method of monitoring the recovery amount of the oil 2 in the storage tank 7 b ′ of the storage mechanism 7 ′ and determining that the injection is completed when the oil level becomes almost zero can be considered. Other determination methods may be used. Thereby, if the injection of the heat exchange medium is not yet completed, the heat exchange medium extraction step is repeated again (step S201). On the other hand, if it is determined that the heat exchange medium injection has been completed, the heat exchange medium injection process ends, and the next process is performed.

  Next, in the heat dissipation process, the heat stored in the heat storage container 1a is released (step S203). That is, in the facility 85, the heat of the heat storage container 1a is used. In the heat dissipation process, the oil 2 circulates and circulates in the circulation passage 4b, and the circulation passage 4b is thermally connected to the facility 85, which is a heat utilization destination, inside the heat exchanger 5b. The heat stored in the heat storage container 1a is conducted to the facility 85 in the heat exchanger 5b.

  Then, the oil 2 after the heat supply passes through the heat exchanger side pipe 5d and the supply pipe 6 of the circulation passage 4b and is supplied from the supply hole 6h to the lower layer portion of the heat storage container 1a where the erythritol 3 is located. Here, since the specific gravity of the oil 2 is smaller than that of the erythritol 3, when the oil 2 is introduced into the lower layer portion of the heat storage container 1a from the supply hole 6h of the circulation passage 4b, the heat storage is performed while directly contacting the erythritol 3. It rises to the upper layer part of the container 1a. At this time, the high-temperature erythritol 3 is in direct contact with the oil 2, whereby the heat of the erythritol 3 is supplied to the oil 2.

  Then, the oil 2 b supplied with heat from the erythritol 3 flows into the discharge pipe 4 of the circulation passage 4 b from the pipe end hole 4 h of the discharge pipe 4. And it is sent to the discharge pipe 4 and the heat exchanger side pipe 5c, where heat is conducted from the oil 2b to the facility 85, and the heat of the heat storage container 1a is utilized in the facility 85. In the heat dissipation step, heat dissipation is performed as described above.

  Next, it is determined whether or not heat dissipation has been completed (step S204). Specifically, for example, a method of monitoring the average temperature of erythritol 3 or the like, and determining that the heat dissipation is completed when the average temperature falls below a certain reference value is conceivable. Other determination methods may be used. Thereby, if heat dissipation is not yet completed, a heat storage process is repeated again (step S203). Thus, the heat stored in the erythritol 3 of the heat storage container 1a can be sufficiently utilized in the facility 85 by repeating the heat dissipation process. On the other hand, if it is determined that the heat dissipation has been completed, the heat dissipation process ends. Thereafter, the oil 2 is taken out from the heat storage container 1a that has been radiated and stored, and the stored oil 2 is injected into the next heat storage container 1a that has been waiting (see FIG. 2). Can be further dissipated.

  As described above, the oil 2 having a small specific heat and hardly contributing to the heat storage is taken out and stored from the heat storage container 1a after the heat exchange medium oil 2 is circulated and stored, and the oil 2 is taken out. The heat storage container 1a in a state can be transported, and the stored heat can be used by supplying and circulating the separately stored oil 2 into the heat storage container 1a at the transport destination of the heat storage container 1a. Thereby, in the transport of the heat storage container 1a, the useless weight of the heat exchange medium (oil 2) that does not contribute to the heat storage can be reduced, so that a heat transport system that can transport the heat storage container at a low cost is obtained.

  Moreover, in the storage mechanism 7, since the connection port 71 which is the taking-out port and the supply port for the oil 2 is provided in the heat storage container 1a, the oil 2 is directly taken out from the heat storage container 1a, so that it can be reduced by a simple configuration. A heat transport system that can transport the heat storage container at a low cost is obtained.

In addition, by using erythritol having a high melting heat as the heat storage body , a heat transport system capable of storing heat at a high temperature (about 119 degrees) with a large amount of heat storage can be obtained. By connecting 1a to a refrigerator, for example, it can be used for air conditioning.

(Second Embodiment)
Next, a second embodiment of the heat transport system according to the present invention will be described with a focus on differences from the above-described embodiment with reference to FIGS. 7 and 8. In addition, about the part similar to said embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted. In the heat transport system 100 according to the present embodiment, unlike the first embodiment, the oil 2 take-out port 171a and the supply port 171b in the storage mechanism 107 are provided separately, and not in the heat storage container 101a. In the middle of the circulation passage 104a. The pump 104p of the circulation passage 104a is provided downstream of the heat exchanger 5a and upstream of the extraction port 171a. The pump 107p of the storage mechanism 107 includes the storage tank 107b and the supply port 171b. Between. Further, in the storage mechanism 107, valves 172b to 172e are provided in the extraction pipe 107a and the supply pipe 107c. In the circulation passage 104a, a valve 172a is also provided between the extraction port 171a and the supply port 171b (see FIG. 7). On the heat radiation side, the extraction pipe 107a, the supply pipe 107c, the extraction port 171a, the supply port 171b, the storage mechanism 107, the valves 172a to 172e, the storage tank 107b, and the pump 107p have the same configuration. 107a ′, a supply pipe 107c ′, an extraction port 171a ′, a supply port 171b ′, a storage mechanism 107 ′, valves 172a ′ to 172e ′, a storage tank 107b ′, and a pump 107p ′ are provided (see FIG. 8). ).

  In the present embodiment, at the time of heat storage (step S101), the valve 172a is in an open state, and the valves 172b to 172e are in a closed state. Further, in the heat exchange medium extraction process (step S103) after the heat storage process, the valve 172b and the valve 172c are opened, and the valves 172a, 172d, and 172e are closed. Then, the oil 2 is sucked into the storage tank 107b by the action of the pump 104p. Due to such a configuration, the oil 2 that circulates inside the circulation passage 104a can be efficiently recovered by taking out the oil 2 from the middle of the circulation passage 104a. In this case, as in the case of heat storage, the oil 2 is recovered by the operation of the pump 104p. Therefore, the oil 2 can be recovered only by opening and closing the valve without stopping the pump 104p.

  In addition, after the heat storage is completed for one heat storage container 101a, when supplying the oil 2 to the heat storage container 101a in which the oil 2 is not stored at the next heat storage, the valves 172a to 172c are closed and the valves 172d and 172e are By opening and operating the pump 107p, the oil 2 is supplied to the heat storage container 101a.

  On the other hand, at the time of heat dissipation (step S203), the valve 172a 'is open, and the valves 172b' to 172e 'are closed. In the heat exchange medium injection step (step S201), the valves 172d 'and 172e' are opened, and the valves 172a 'to 172c' are closed. The oil 107 is sucked from the storage tank 107 b ′ by the action of the pump 107 p ′ and sent out to the heat storage device 1 a via the supply pipe 6.

  The storage tank 107b is provided with a heating mechanism 107t for heating and storing the stored oil 2 (a heating mechanism 107t 'having the same configuration as the heating mechanism 107t on the heat radiation side). Specifically, the heating mechanism 107t is a heater using resistance heating or the like. Thereby, since the fall of the temperature of the stored oil 2 can be prevented, the heat loss at the time of supplying the oil 2 which is collect | recovered and stored to the thermal storage container 101a again and using it can be reduced. Here, the storage tank 107b may be formed of a member capable of keeping the internal oil 2 warm. Further, after the heat dissipation for one heat storage container 101a is completed, the valves 172a ′, 172d ′, 172e ′ are closed, the valves 172b ′, 172c ′ are opened, and the pump 104q is operated, so that the oil 2 in the container 101a is discharged. The oil 2 is extracted and stored in the storage tank 107b ′ again.

  Further, as in the present embodiment, in the circulation passage 4a, the storage mechanism 107 is provided on the downstream side of the heat exchanger 5a, so that the heat supply from the factory (heat source) 80 is provided as compared with the case where it is provided on the upstream side. Since the hotter oil 2a received can be stored, heat loss when the recovered and stored oil 2 is supplied to the heat storage container 101a again and used can be reduced.

(Third embodiment)
Next, a third embodiment of the heat transport system according to the present invention will be described with a focus on differences from the above embodiment with reference to FIG. In addition, about the part similar to said embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted. In the heat transport system 200 according to the present embodiment, unlike the above-described embodiment, in the storage mechanism 207, the oil 2 outlet 271a is in the middle of the circulation passage 204a and downstream of the factory 80, which is a heat source. The oil 2 supply port 271 b is provided in the middle of the circulation passage 204 a and upstream of the factory 80. The pump 204p of the circulation passage 204a is provided on the downstream side of the heat exchanger 5a and upstream of the extraction port 271a. The pump 207p of the storage mechanism 207 includes the storage tank 207b and the supply port 271b. Between. Further, in the storage mechanism 207, valves 272b to 272e are provided in the extraction pipe 207a and the supply pipe 207c. In the circulation passage 204a, a valve 272a is provided between the take-out port 271a and the supply port 271b, and a valve 272f is provided between the supply port 271b and the connection port 51.

  In this embodiment, at the time of heat storage, the valves 272a and 272f are in an open state, and the valves 272b to 272e are in a closed state. In the heat exchange medium extraction step (step S103) after the heat storage step, the valves 272b, 272c, and 272f are opened, and the valves 272a, 272d, and 272e are closed. Then, the oil 2 is sucked into the storage tank 207b by the action of the pump 204p. Thereby, the oil 2 which distribute | circulates the inside of the channel | path 204a for circulation can be efficiently collect | recovered by taking out in the middle of the channel | path 204a for circulation.

  In addition, after the heat storage is completed for one heat storage container 201a, when supplying the oil 2 to the heat storage container 201a in which the oil 2 is not accommodated at the next heat storage, the valves 272b, 272c, 272f are closed, By opening the valves 272d and 272e and operating the pumps 204p and 207p, the oil 2 is supplied to the heat storage container 201a.

  Unlike the second embodiment, the storage tank 207b is not provided with an external heating mechanism. Therefore, if it is left as it is after the extraction step, the temperature of the oil 2 in the storage tank 207b is lowered. Therefore, the valves 272b to 272e are opened, the valves 272a and 272f are closed, and the pump 204p and the pump 207p are operated, so that the oil 2 is stored in the storage tank 207b, the supply pipe 207c, and the heat exchanger side pipe 205c. The circulation path 274 is formed by a path (part of) and a path of the take-out pipe 207a. And after completion | finish of an extraction process, by operating the pump 204p and the pump 207p suitably in the circulation path 274, the oil 2 in the storage tank 207b is circulated intermittently, and it is made to heat-exchange with the heat exchanger 5a, heating mechanism Since it is possible to prevent the temperature of the oil 2 from being lowered without separately providing heat, it is possible to efficiently reduce heat loss when the recovered oil 2 is supplied to the heat storage container 201a and used again.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made as long as they are described in the claims.

  For example, in the above-described embodiment, the storage mechanism on the heat storage side and the storage mechanism on the heat dissipation side are assumed to have the same configuration, but the present invention is not limited to this, and the storage mechanism on the heat dissipation side is attached to the heat storage container. What is necessary is just to be able to supply the stored heat exchange medium.

  In the above embodiment, the heat transport system 1 includes the heat storage container 201a and the heat storage side circulation passage 4a, and further includes the heat dissipation side circulation passage 4b during heat dissipation. However, the heat transport system 1 does not have to include the circulation passage 4b on the heat radiation side.

Moreover, since the weight of the heat exchange medium can be reduced by the heat transport system according to the present invention, the traveling efficiency of the transport mechanism can be improved, and the amount of CO ₂ emission during transport of the heat storage container can be reduced.

The schematic diagram showing the whole heat storage side composition of the heat transportation system concerning a 1st embodiment of the present invention. Schematic which shows the whole structure by the side of the thermal radiation of the heat transport system which concerns on 1st Embodiment of this invention. Schematic which shows the more concrete structure of the heat transport system of FIG. Schematic which shows the more concrete structure of the heat transport system of FIG. The flowchart in the thermal storage stage of the heat transport system which concerns on 1st Embodiment of this invention. The flowchart in the thermal radiation stage of the heat transport system which concerns on 1st Embodiment of this invention. Schematic which shows the structure by the side of the thermal storage of the heat transport system which concerns on 2nd Embodiment of this invention. Schematic which shows the structure by the side of the thermal radiation of the heat transport system which concerns on 2nd Embodiment of this invention. Schematic which shows the structure of the heat transport system which concerns on 3rd Embodiment of this invention.

Explanation of symbols

1, 100, 200 Heat transport system 1a Heat storage container 2, 2a, 2b Oil (heat exchange medium)
3 Erythritol (heat storage)
4a, 4b, 104a, 104b, 204a Circulation passages 7, 107, 207 Storage mechanism (storage means)
71, 171a, 271a Extraction port 71, 171b, 271b Supply port 107t Heating mechanism

Claims (2)

A heat storage body for storing heat by latent heat storage;
Heat exchange by contacting the heat storage body, a heat exchange medium having a specific gravity smaller than the heat storage body and separated from the heat storage body;
A heat storage container that houses the heat storage body and the heat exchange medium;
A circulation passage in which the heat exchange medium circulates and is formed in communication with the heat storage container, and is thermally connected to a heat source to supply heat to the heat exchange medium;
A storage means for taking out and storing the heat exchange medium from the heat storage container, and supplying the stored heat exchange medium to the heat storage container;
In the storage means, the heat exchange medium outlet is provided in the middle of the circulation passage and on the downstream side of the heat source, and the heat exchange medium supply port is provided in the circulation passage. In the middle and provided upstream of the heat source,
The heat storage system, wherein the heat storage container is transportable. The heat transfer system according to claim 1 , wherein the heat storage body is erythritol.

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