JP5083881B2 - Thermal storage device and thermal management method thereof - Google Patents

Description

  The present invention relates to a heat storage device that stores heat applied from the outside using a phase change of a substance.

  In order to recover and use the heat stored by melting the phase change heat storage material, it is necessary to generate the heat of solidification by nucleating the phase change heat storage material that has fallen to a temperature lower than the melting point when necessary. There is. Many of the substances considered as phase change heat storage materials do not start to solidify immediately even when the temperature drops to the melting point, and after cooling to a temperature lower than the melting point, solidification starts and releases the heat of solidification. There is a nature. The difference between the melting point and the solidification start temperature, that is, the degree of supercooling varies depending on the substance and the state in which it is placed, but there are substances that reach 60 ° C. or more. For this reason, various methods have been devised for quickly nucleating the melt of the phase change heat storage material at a temperature below the freezing point and initiating solidification.

  FIG. 4 shows a conventional heat storage device described in Japanese Patent No. 347295, Japanese Patent No. 3867147, and the like. In FIG. 4, 71 is a heat storage container, and 72 is a supercoolable phase change heat storage material filled in the heat storage container 71, and the heat storage container 71 and the phase change heat storage material 72 form a heat storage body. 73 is a heat storage tank that houses the heat storage body, 74 is a heat insulator that divides the inside of the heat storage tank 73 into an upper heat storage section and a lower nucleation section, and 75, 76, and 79 are low-temperature when releasing supercooling. A path for injecting the heat medium, 77 and 78 for extracting the high-temperature heat obtained by releasing the supercooling through the heat medium, 80-83 for the two-way valve, and 84 for the heating / cooling heat source , 85 is heat utilization equipment, and 86 is a pump.

In the heat storage device configured as described above, in the heat injection process, the heating / cooling heat source 84 sequentially passes the path 75, the path 76 and the path 77, and the path 78 to the nucleation section and the heat storage section of the heat storage tank 73. A high-temperature heat medium is circulated to melt the phase change heat storage material 72. In the heat preservation process, the supercooled state of the phase change heat storage material 72 is kept. In the heat extraction process, in order to release the supercooling state of the phase change heat storage material 72, a heat medium having a temperature lower than the spontaneous solidification start temperature is passed from the heating / cooling heat source 84 via the path 75, the path 76, and the path 79. The phase change heat storage material 72 located in the nucleation part is cooled by circulating in the nucleation part of the heat storage tank 73. By this operation, nucleation occurs from the lower part of the phase change heat storage material 72, and recrystallization of the phase change heat storage material 72 starts. Once recrystallization begins, the crystals grow rapidly upward. Therefore, if the heat medium is circulated to the nucleation part and the heat storage part of the heat storage tank 73 via the path 75, the path 76, the path 77, and the path 78, the heat of solidification released from the phase change heat storage material 72 is recovered, It can be used in the heat utilization equipment 85 connected to the heat storage device.
Japanese Patent No. 3447295 Japanese Patent No. 3867147

  In order to release the supercooled state, the heat storage device configured as described above uses the cooling device to cool the heat medium to a temperature lower than the spontaneous solidification start temperature of the heat storage material, and in the nucleation part of the heat storage tank. It is necessary to circulate. In general, the cooling device has a complicated mechanism and is more expensive than the heating device, which causes the equipment to be complicated and expensive. In addition, since the heat medium once cooled by the cooling device is used as it is for heat recovery of the heat storage section, a part of the high-temperature heat generated by the release of the solidification heat is offset with the low-temperature heat. It also caused a reduction in the amount recovered. Further, when the heat storage material is heated and melted, in order to avoid bubbles generated in the heat medium from staying in the vicinity of the inlet / outlet of the heat storage tank and the flow of the heat medium to stagnate, there is a significant volume difference. It is necessary to connect the nucleation part and the heat storage part in series and flow the heat medium, and the flow rate is excessive for the nucleation part, and conversely, the flow rate is too low for the heat storage part. It was also.

  The present invention has been made to solve the above-described problems, and can control the nucleation of a heat storage material in a supercooled state without using a cooling device, and the solidification heat generated by the solidification of the heat storage material. A heat storage device that is not lost by offsetting the cooling operation for nucleation, and even if the heat medium flows in parallel to the nucleation part and the heat storage part of the heat storage tank, It aims at providing the thermal storage apparatus which can avoid the disorder | damage | failure in which a bubble stays and the flow of a thermal medium stagnates, and the thermal storage apparatus which combined them.

Heat storage device according to the invention, a filled heat storage vessel supercooled thermal energy storage material to store the given heat, the thermal storage tank having a heat storage vessel therein, the majority of the pre-Symbol heat storage tank its When the heat storage part A and the nucleation part B occupying the other small part are separated , and the heat insulating partition plate through which the heat storage container penetrates and the heat from the heat source is injected, the heat storage part A and When a heat medium from the heat source is circulated to the nucleation part B to heat the heat storage material and the stored heat is extracted, a heat medium is circulated from the heat utilization facility to the nucleation part B to obtain the heat storage. to initiate clotting of the wood, to recover heat from the heat storage material by circulating a heat medium to the heat storage unit a, composed of a two-way valve for switching a conduit to supply the heat utilization equipment, as before Symbol heat storage material high potatoes than the freezing start temperature operating minimum temperature of the pipe or heat-utilizing facility By using, at the time of heat storage, the heat storage material in the thermal storage tank and can be held in a supercooled state, and, when the heat extraction, the nucleation section B, operation of the conduit or heat utilizing facility solidifying the heat storage material by circulating the heat medium in which the lowest temperature, characterized Rukoto transfers heat to the heat utilization facility.

Further, the two-way valve is pos- sibly conduit to the heat storage unit A branch from the heat source, and, respectively provided al is in the middle of pos- sibly conduit branched from the heat source to the nucleation portion B, and repeating the previous SL alternately opens during operation a brief closing operation appropriate for heating the heat storage material.
In addition, a heat exchanger for isolating the flow of the heat medium is provided between the heat storage tank and the heat utilization facility.
The heat storage material is mainly composed of a polyhydric alcohol.
Further, when extracting heat from the heat storage tank, the liquid phase sensible heat of the heat storage material is recovered and used up to near the spontaneous solidification start temperature of the heat storage material, and thus the supercooled state is obtained. to then held by supercooled state heat storage material until needed, it was circulated heat medium and cooling the heat storage material below the solidification starting temperature Rukoto to initiate clotting in the nucleation section B, the heat storage material The latent heat of solidification is recovered and used.

  In the heat storage device according to the present invention, in addition to the heat storage material and the heat storage tank similar to the conventional example, heat is applied to the area A (heat storage section) occupying most of the heat storage tank and the area B (nucleation section) occupying a small part. A heat source and a pipe line for circulating the medium to heat the heat storage material, a heat medium to be circulated through the heat storage part and the nucleation part, heat is collected from the heat storage material, and a heat utilization facility and a pipe to be used are provided. Applies a material whose solidification start temperature is higher than the minimum operating temperature of the pipeline or heat utilization equipment. Thus, it is not necessary to use a special cooling device when promoting the nucleation of the heat storage material during the supercooling, and the heat medium is simply circulated between the nucleation portion of the heat storage tank and the pipe or heat utilization equipment. Only, the temperature of the heat storage material can be made lower than the spontaneous solidification start temperature, and solidification can be started. At this time, the heat medium circulating in the nucleation part is heated gently by receiving the solidification heat of the nucleation part, and then supplied to the heat storage part to recover the generated solidification heat. The heat transferred to the heat medium is supplied as it is to the heat utilization facility through the heat storage unit and can be used effectively.

  Further, during the heating operation of the heat storage material, the two-way valve provided in the heat medium pipe line from the heating source to the heat storage unit and the nucleation unit of the heat storage device alternately repeats the short-time closing operation as appropriate. The parallel flow of the heat storage part and the heat storage part temporarily collapses each time, and the heat medium flows only in the heat storage part or the nucleation part. For this reason, the flow rate temporarily increases on the open side, and bubbles that are about to stay in the vicinity of the pipe entrance / exit of the heat storage tank are allowed to flow out, so that the parallel flow and the flow comparable to the series connection can be maintained. Therefore, it is possible to set a heat medium flow rate suitable for each of the heat storage section and the nucleation section of the heat storage tank in parallel connection, and to appropriately supply heat to the heat storage section and the nucleation section.

  Furthermore, the liquid phase sensible heat (heat resulting from the heat capacity) of the heat storage material 1 is recovered and effectively used as the first heat output up to near the spontaneous solidification start temperature of the heat storage material 1, and the heat demand after supercooled storage In addition, the heat storage material is solidified, and the phase change heat of the heat storage material 1 can be recovered and effectively used as the second heat output. Therefore, it is possible to improve the heat storage efficiency and increase the temporal diversity of heat supply.

  The heat storage device of the present invention uses a heat storage material having a spontaneous solidification start temperature higher than the minimum operating temperature of pipes and heat utilization equipment, and is two-way with respect to the heat medium path leading to the nucleation part and the heat storage part of the heat storage tank. The valve is characterized in that a short-time closing operation is repeated alternately and appropriately.

  FIG. 1 is a sectional structural view of a heat storage device of the present invention. In FIG. 1, 1 is a phase-change heat storage material that can be supercooled, 2 is a heat storage container that is filled with the heat storage material 1, 3 is a heat storage tank that is filled with the heat storage container 2, and 4 is a region A that occupies most of the heat storage tank ( A heat insulating plate that divides the inside of the heat storage tank into a heat storage portion) and a region B (nucleation portion) that occupies a small portion, and the heat storage container 3 penetrates the heat insulating plate 4 and exists in both the region A and the region B. . 5 is a heat source, 6 is a heat utilization facility, and 7 and 8 are pipes for injecting and extracting a heat medium from the outside to the area B occupying a small portion of the heat storage tank to exchange heat with the heat storage material 1. , 9 and 10 are pipes for injecting and extracting a heat medium from the outside to the area A occupying most of the heat storage tank to exchange heat with the heat storage material 1. 11 is a pipe that bypasses the heat storage tank 3 and connects the pipe 7 and the pipe 8, 12 is a pipe that connects the heat storage tank 3 and the heating source 5, and 13, 14, 15, and 16 are pipes, respectively. Two-way valves provided in the middle of 7, 11, 10 and 12, 17 and 18 are two-way valves provided in pipes connected to the heating source 5 and the heat utilization equipment 6, respectively, and 19 circulates the heat medium. It is a pump for making it.

  For the heat storage material 1, a substance having a spontaneous solidification start temperature higher than the pipeline temperature of the pipeline 7, the pipeline 8, the pipeline 12, or the operation minimum temperature of the heat utilization facility 6 is applied. For example, when the heat storage material 1 is stored in a supercooled state, the temperature of the pipeline 7, the pipeline 8, the pipeline 12, or the like, or the temperature of the heat utilization facility 6 is lowered to a room temperature of 20 to 30 ° C. If so, thritol having a melting point of 87 ° C. can be applied to the heat storage material 1. This is because the solidification start temperature of slatitol is about 40 ° C., which satisfies the relationship of [minimum operation temperature of pipe line or heat utilization equipment] <[solidification start temperature of heat storage material]. The heat storage material 1 is not limited to the above example as long as the material satisfies the above temperature relationship, and various materials can be applied. For example, the heat storage material 1 includes polyhydric alcohols such as erythritol (melting point 119 ° C.), mannitol (melting point 167 ° C.), dulcitol (melting point 187 ° C.), pentaerythritol (melting point 187 ° C.), inositol (melting point 224 ° C.), potassium sulfate. Hydrate such as aluminum dodecahydrate (melting point 91 ° C), ammonium sulfate aluminum dodecahydrate (melting point 94 ° C), magnesium chloride hexahydrate (melting point 115 ° C), polyethylene glycol (melting point 40-70 ° C) ), A substance mainly composed of paraffin (melting point: 40 to 120 ° C.) and the like can be applied.

  Polypropylene can be used for the heat storage container 2, but various materials can be applied as long as the heat storage material 1 has material compatibility such as heat resistance, pressure resistance, and corrosion resistance. For example, other polyolefin resins and cross-linked products thereof, fluororesins, copper, stainless steel, aluminum oxide, and the like have high corrosion resistance and can be applied to various heat storage materials 1.

  Next, the operation of the heat storage device configured as described above will be described. First, at the time of heat injection, the two-way valves 13, 15, 17 are opened, the two-way valves 14, 16, 18 are closed, and the pipe line 7 → from the heating source 5 to the nucleation part B and the heat storage part A of the heat storage tank 3 A high-temperature heat medium is circulated in the order of the pipe line 8 → the pipe line 9 → the pipe line 10, and the heat storage material 1 is heated and melted through the container 2. When the heat storage is completed, the circulation of the heat medium is stopped and the heat storage tank 3 is left.

  During the heat storage period, the temperature of the heat storage material 1, the heat utilization equipment and the pipes connecting them gradually decreases due to natural heat dissipation from the heat storage tank 3 to the environment around the heat storage tank, and approaches the environmental temperature. Go. When the temperature in the heat storage tank 3 falls below the melting point of the heat storage material 1, the heat storage material 1 enters a supercooled state. Further, even if the temperature of the heat storage material 1 is lowered, the heat storage material 1 maintains a supercooled state and continues to hold the heat of solidification in the liquid phase unless the temperature of the heat storage material 1 reaches the spontaneous solidification start temperature. At this time, the temperature of the elongated pipe-shaped pipe with a large surface area per unit volume and the heat utilization facility 6 on the premise of heat radiation is a unit compared to the heat storage tank 3 with a small surface area per unit volume for the purpose of heat storage. The amount of heat released per volume is large, so the temperature drop is significant.

  At the time of heat extraction, first, the two-way valves 13, 16, 18 are opened, the two-way valves 14, 15, 17 are closed, and the heat medium is supplied to the nucleation part B of the heat storage tank 3 through the pipe lines 7, 8, 12. Circulate. At this time, since the temperatures of the pipes 7, 8, 12, and the like and the heat utilization equipment 6 are lowered to near room temperature, the heat storage material in the nucleation part B is cooled to a temperature near room temperature, and is spontaneous Coagulation is induced. Once the crystal nucleus is generated, the crystal grows upward, and solidification progresses while releasing latent heat to the heat storage part A. When the nucleation of all the heat storage materials 1 in the nucleation part B is completed, the circulation of the heat medium from the pipe line 7 to the pipe line 8 is stopped. Next, in order to extract the heat of solidification released from the heat storage material 1, the two-way valves 14, 15, 18 are opened, the two-way valves 13, 16, 17 are closed, and the heat storage tank 3 is connected via the pipelines 11, 9. The heat medium is injected into the heat storage part A, and heat is transferred from the heat storage material 1 to the heat medium. The heat medium heated by the heat of solidification of the heat storage material 1 flows out of the pipe 10 and moves to the heat utilization facility 6 to give heat. The heat medium used at the heat utilization facility 6 and having a low temperature returns to the heat storage section A through the pipes 11 and 9 and circulates again.

  What is necessary is just to set the quantity of the thermal storage material 1 so that the temperature in the thermal storage tank 3 may not fall below the spontaneous solidification start temperature of the thermal storage material 1 until required time. When the heat medium is circulated in order to nucleate the heat storage material 1, the heat storage material 1 in the nucleation part B of the heat storage tank 3 releases solidification heat, so that the temperature of the heat medium rises. Since the same heat medium is used for recovery of the solidification heat of the heat storage section A of the heat storage tank 3, the heat storage apparatus of the present invention preheats the heat medium by circulation for nucleation, and the energy at the time of nucleation is also heat utilization equipment. The result is effectively used.

  FIG. 2 is a sectional structural view of another heat storage device of the present invention. 2, reference numerals 1 to 8 and 19 denote the same or corresponding parts as those in FIG. 21 is a pipe line connecting the heat source 5 and the heat storage part A of the heat storage tank 3, 22 and 23 are pipe lines connecting the heat storage part A, the heat source 5 and the heat utilization equipment 6, and 24 and 25 are heat storage tanks, respectively. 3, a heat source 5, a two-way valve provided in a pipe line 23 connected to the heat storage tank 3 and the heat utilization facility 6, 26 and 27 are pipe lines connected to the heat source 5 and the heat storage part A of the heat storage tank 3 21, two-way valves provided in the heat utilization facility 6 and the pipe line 7 connected to the nucleation part B of the heat storage tank 3.

Next, the operation of the heat storage device configured as described above will be described. First, at the time of heat injection, the two-way valves 24, 26 and 27 are opened, the two-way valve 25 is closed, and the heat source 5 and the nucleation part B and the heat storage part A of the heat storage tank 3 are connected in parallel from the pipe 7 8. A high-temperature heat medium is circulated from the pipe line 21 to the pipe line 22, and the heat storage material 1 is heated and melted through the container 2.
At that time, the two-way valves 26 and 27 are alternately closed for a short time at a constant cycle. By this operation, the parallel flow of the nucleation part B and the heat storage part A is temporarily broken each time, and the heat medium flows only to the heat storage part A or the nucleation part B. For this reason, on the open side, the flow velocity temporarily increases, and bubbles that try to stay in the vicinity of the pipe entrance / exit of the heat storage tank are allowed to flow out, and a stable flow comparable to the series connection can be maintained while being connected in parallel. it can. Therefore, it is possible to set a heat medium flow rate suitable for each of the heat storage part A and the nucleation part B of the heat storage tank in parallel connection, and to appropriately supply heat to the heat storage part A and the nucleation part B. Become.
When the heat storage is completed, the circulation of the heat medium is stopped and the heat storage tank 3 is left.

  During the heat storage period, the temperature of the heat storage tank 3 is gently lowered for natural heat dissipation from the heat storage tank 3 to the environment surrounding the heat storage tank, as in the case of FIG. Become. Moreover, the temperature of the pipe line and the heat utilization equipment 6 rapidly decreases and approaches room temperature.

  At the time of heat extraction, first, the two-way valves 25 and 26 are opened, the two-way valves 24 and 27 are closed, and the heat medium is circulated through the pipes 7, 8, and 23 to the nucleation part B of the heat storage tank 3. At this time, since the temperatures of the pipes 7, 8, 23, etc. and the heat utilization equipment 6 are lowered to near room temperature, the heat storage material in the nucleation part B is cooled to a temperature near room temperature, and is spontaneous Coagulation is induced. Once the crystal nucleus is generated, the crystal grows upward, and solidification progresses while releasing latent heat to the heat storage part A. When the nucleation of all the heat storage materials 1 in the nucleation part B is completed, the circulation of the heat medium from the pipe line 7 to the pipe line 8 is stopped. Next, in order to extract the heat of solidification released from the heat storage material 1, the two-way valves 25 and 27 are opened, the two-way valves 24 and 26 are closed, and the heat is stored in the heat storage section A of the heat storage tank 3 through the pipe 21. The medium is injected to transfer heat from the heat storage material 1 to the heat medium. The heat medium heated by the solidification heat of the heat storage material 1 flows out of the pipe line 22 and moves to the heat utilization facility 6 through the pipe line 23 to give heat. The heat medium which has been used at the heat utilization facility 6 and has a low temperature returns to the heat storage section A through the pipe 21 and circulates again.

  FIG. 3 shows a sectional structural view of another heat storage device of the present invention. In FIG. 3, reference numerals 1-4, 7, 8, 10, 12, 15, 16 denote the same or corresponding parts as those in FIG. Reference numerals 21, 26 and 27 denote the same or corresponding parts as those in FIG. 41 is a heat insulating material that keeps the heat storage tank 3 warm, 42 is an economizer that exchanges waste heat of exhaust gas from combustion equipment with heat of hot water, 43 is a heat exchanger, 44 is a heat dissipation panel for heating, and 45 to 51 are heat Pipes through which the medium flows, 52 to 56 are two-way valves provided in the pipes, 57 is an exhaust gas damper, 58 and 59 are the heat storage tank 3 side, and the heat medium circulation pump on the heat radiation panel 44 side, and 60 and 61 are respectively A temperature adjusting three-way valve 62 on the heat storage tank 3 side and the heat radiating panel 44 side, 62 is an exhaust gas pipe.

Next, the operation of the heat storage device configured as described above will be described. First, at the time of heat injection, the two-way valves 15, 16, 26, 27, 52, 54 are opened, the two-way valves 53, 55, 56 are closed, and the nucleation part B, the heat storage part of the heat storage tank 3 from the economizer 42. In parallel with A, a high-temperature heat medium is caused to flow from the pipeline 7 to the pipeline 8 and from the pipeline 21 to the pipeline 10, and is circulated via the pipelines 12, 45, 50, and the heat storage material 1 is heated via the container 2. Melt.
At that time, the two-way valves 26 and 27 are alternately closed for a short period of time at a constant cycle as in FIG. 2 of the second embodiment. By this operation, the parallel flow of the nucleation part B and the heat storage part A is temporarily broken each time, and the heat medium flows only to the heat storage part A or the nucleation part B. For this reason, on the open side, the flow velocity temporarily increases, and bubbles that try to stay in the vicinity of the pipe entrance / exit of the heat storage tank are allowed to flow out, so that a stable flow comparable to the series connection is maintained despite the parallel connection. Can do. Therefore, it is possible to set a heat medium flow rate suitable for each of the heat storage part A and the nucleation part B of the heat storage tank in parallel connection, and to appropriately supply heat to the heat storage part A and the nucleation part B. Become. When the heat storage is completed, the circulation of the heat medium is stopped and the heat storage tank 3 is left.

  In the present embodiment, if the two-way valve 53 is opened during the above-described heating operation of the heat storage material 1, the heat supply to the heat radiating panel 44 can be performed in parallel. After the heat storage material 1 is melted, if the two-way valves 54, 56, 53 are opened and the two-way valves 15, 16, 26, 27, 52, 55 are closed, the heat supply to the heat storage tank 3 is stopped. Thus, it is possible to perform only the heat supply from the economizer 42 to the heat radiating panel 44.

  During the heat storage period, the temperature of the heat storage tank 3 is gently lowered for natural heat dissipation from the heat storage tank 3 to the environment around the heat storage tank as in the case of FIG. It becomes a state. Moreover, the temperature of the pipe line, the heat exchanger 43, and the heat radiating panel 44 rapidly decreases and approaches room temperature. Further, if the heat supply of the waste gas is stopped, the temperature of the economizer 42 is lowered and approaches room temperature.

  At the time of heat extraction, first, the two-way valves 16, 26, 53, 55 are opened, the two-way valves 15, 27, 52, 54, 56 are closed, and the pipelines 7, 8, 12 are connected to the nucleation part B of the heat storage tank 3. , 46, 51 to circulate the heat medium. At this time, it is more effective to circulate the heat medium on the heat radiation panel 44 side. Further, if the temperature of the economizer 42 is lowered to room temperature, it is more effective to open the two-way valve 54 and close the two-way valve 55 and to circulate the heat medium to the economizer 42 via the conduit 50. It is. Since the temperatures of the pipelines 7, 8, 46, 48 and the like and the heat radiation panel 44 are lowered to near room temperature, the heat storage material in the nucleation part B is cooled to a temperature near room temperature and spontaneously solidifies. Is triggered. Once the crystal nucleus is generated, the crystal grows upward, and solidification progresses while releasing latent heat to the heat storage part A. When the nucleation of all the heat storage materials 1 in the nucleation part B is completed, the circulation of the heat medium from the pipe line 7 to the pipe line 8 is stopped.

  Next, in order to extract the heat of solidification released from the heat storage material 1, the two-way valves 15, 27, 53, and 55 are opened, the two-way valves 16, 26, 52, 54, and 56 are closed, Then, a heat medium is injected into the heat storage part A of the heat storage tank 3, and heat is transferred from the heat storage material 1 to the heat medium. The heat medium heated by the solidification heat of the heat storage material 1 moves from the pipe line 10 to the heat exchanger 43 via the pipe line 46, and transfers heat to another heat medium on the pipe line 47 side. The heated heat medium on the side of the pipe 47 is moved to the heat radiating panel 44 via 48 and gives heat to the panel. The heat medium on the side of the heat storage tank 3, which has been subjected to heat exchange in the heat exchanger 43 and has reached a low temperature, returns to the heat storage unit A via the pipe line 21 and then circulates. Thereby, heating by the heat stored in the heat storage tank becomes possible on the side of the heat dissipation panel 44.

  In the above heat storage period, the liquid phase sensible heat of the heat storage material 1 is collected and used until the spontaneous solidification start temperature of the heat storage material 1 is used, and the heat storage material 1 in a supercooled state thereby is used as follows. If the heat demand is maintained in a supercooled state, the first heat supply can be performed, and an unnecessary amount of natural heat radiation from the heat storage tank 3 can be suppressed. Then, after storage in the supercooled state, if the heat storage material 1 is started to solidify by circulating the heat medium to the nucleation part B of the heat storage tank 3, and the solidification latent heat of the heat storage material 1 is recovered, the second The heat supply can be performed. That is, according to the apparatus of the present invention, the stored heat can be efficiently recovered and used in different time zones sandwiching the supercooled state.

It is a cross-section figure of the heat storage apparatus of this invention. Example 1 It is a cross-section figure of the heat storage apparatus of this invention. (Example 2) It is a cross-section figure of the heat storage apparatus of this invention. (Example 3) It is sectional drawing of the conventional heat storage apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Thermal storage material 2 Thermal storage container 3 Thermal storage tank 4 Heat insulation board 5 Heat source 6 Heat utilization equipment 7-12, 21-23, 45-51 Pipe line 13-18, 24-27, 52-56 Two-way valve 19,58, 59 pump 41 heat insulating material 42 economizer 43 heat exchanger 44 heat radiating panel 57 exhaust gas damper 60, 61 three-way valve 62 exhaust gas pipe

Claims (5)

And filled heat storage vessel supercooled thermal energy storage material to store the given heat, the heat storage tank the heat storage container provided inside the heat storage tank its other slightly and the heat storage unit A which occupies most of such as to separate the nucleation portion B occupying portion, and the heat insulation of the partition plate for the heat storage vessel is penetrated, due to injection of heat from the heat source, the heat storage unit a and the nucleating section B, the heat source When the heat storage material is circulated to heat the heat storage material and the stored heat is extracted, the heat generation material is circulated from the heat utilization equipment to the nucleation part B to start solidification of the heat storage material, to recover heat from the heat storage material by circulating a heat medium in the heat storage unit a, composed of a two-way valve for switching a conduit to supply the heat utilization equipment, as before Symbol heat storage material, the solidification starting temperature is the conduit the use of high casting than or lowest operating temperature of the heat utilization equipment, During storage, the heat storage material in the thermal storage tank and can be held in a supercooled state, and, when the heat extraction, the nucleation portion B, the heat became lowest operating temperature of the conduit or heat utilizing facility solidifying the heat storage material by circulating a medium, heat storage device according to claim Rukoto transfers heat to the heat utilization facility. The two-way valve is pos- sibly conduit to the heat storage unit A branch from the heat source, and, respectively provided al is in the middle of pos- sibly conduit branched from the heat source to the nucleation portion B, before Symbol The heat storage device according to claim 1, wherein a short-time closing operation is repeated alternately and appropriately during an opening operation for heating the heat storage material.   The heat storage device according to claim 1, wherein a heat exchanger that isolates the flow of the heat medium is provided between the heat storage tank and the heat utilization facility.   The heat storage device according to any one of claims 1 to 3, wherein the heat storage material contains polyhydric alcohol as a main component. When extracting heat from the heat storage tank, the liquid storage sensible heat of the heat storage material is recovered and used up to near the spontaneous solidification start temperature of the heat storage material, thereby being in a supercooled state. to then held at a supercooled state until needed, the nucleation portion B in Rukoto was circulated heat medium and cooling the heat storage material below the solidification starting temperature to start the coagulation, solidification of the heat storage material The heat management method for a heat storage device according to claim 1, wherein latent heat is recovered and used.

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