JP2004108761A - Heat storage tank, heat storage system and heating or cooling method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat storage tank having high heat storage efficiency and a heat storage system using the same and having improved energy efficiency. <P>SOLUTION: The heat storage tank comprises cylindrical containers filled with cold storage agents or heat storage agents and uniformly arranged in no contact with one another, the gross cross section area of the cylindrical container being 70-80% of the cross section area of the heat storage tank in the cross section of the heat storage tank. Preferably, a heat or cold storage system and a heating and cooling method use the same. <P>COPYRIGHT: (C)2004,JPO

Description

The present invention relates to a heat storage tank, a heat storage system, and a heating / cooling method. For more information,
A heat storage in which a cylindrical metal container filled with a heat storage agent or a cold storage agent is arranged so as not to contact in the tank, and the total cross-sectional area of the cylindrical metal container in the tank cross section is 50% to 95% of the tank cross-sectional area. The present invention relates to a tank, a heat storage system and a heating / cooling method using the same.

In recent years, the difference in power demand between day and night has increased due to the increase in power demand such as daytime cooling in summer. As one of the methods for reducing the difference in power demand between daytime and nighttime in summer, it is conceivable to use nighttime power effectively. Until now, as a specific example of such an effective use, many ice heat storage systems have been proposed in which water is frozen using nighttime electric power and the latent heat of ice is used. The ice heat storage system is a system in which latent heat when water becomes ice is stored as cold heat, and when cold heat is required, the ice is thawed to take out cold heat.

However, in such an ice thermal storage system, as the freezing progresses, the heat transfer between the brine and the ice deteriorates, and the ice becomes larger in volume than the water during the freezing, so that the cold storage container may be broken. . As a regenerative storage system that solves this problem, a system that fills the regenerator with a superabsorbent resin, freezes the water held in the superabsorbent resin by the medium cooled by the refrigerator at the time of refrigerating, and stores the cold using the latent heat of ice. Have been proposed (Patent Documents 1 and 2).
JP-A-2-219933 JP-A-5-240774

As described above, this system fills a cold storage container with a superabsorbent resin holding water and freezes the water held in the superabsorbent resin.When the cooling load is relatively small, such as at night, In this way, cold energy is stored in the form of latent heat of ice, which is advantageous in terms of heat transfer as compared to conventional ice cooling systems, and allows the cold storage container to be made more compact and safer. There is a remarkable progress in this regard.

As described above, the above-described cold storage system utilizes the freezing and thawing of the water in the water-absorbing gel, and is not a method of attaching ice to the outside of the tube as in the conventional method, and thus is an energy-efficient method. However, in these methods, in addition to the need for the water-absorbing gel to have excellent durability, it is essential that the water in the water-absorbing gel does not leach into the heat medium. In other words, in these methods, it is important to select the type of the water-absorbing gel and the heat medium to be combined with the method. In addition to the high cost of the water-absorbing gel, it is necessary to perform the heat storage and heat radiation very carefully. It is actually difficult to put a heat storage system that can be used stably for a long period of time into practical use.

(4) In most conventional heat storage systems, improvement of the heat storage agent has been studied to increase the heat storage efficiency, and this is the most efficient study method to increase the heat storage efficiency. However, although it is very significant to consider only the improvement of the heat storage agent in order to increase the heat storage efficiency, it is quite difficult to find an effective heat storage agent. Under such circumstances, it is very important to study the structure of the heat storage tank itself. Therefore, an object of the present invention is to provide a heat storage tank, a heat storage system, and a heating / cooling method with high heat storage efficiency, which have been studied in terms of the structure of the heat storage tank.

The present inventors have conducted intensive studies to achieve the above object, and have reached the present invention. That is, the first invention of the present invention is a heat storage tank in which a cylindrical metal container filled with a heat storage agent or a cold storage agent is arranged so as not to come into contact with the inside of the tank, and has a cylindrical shape in a cross section of the heat storage tank. The heat storage tank is characterized in that the total cross-sectional area of the metal container is 50% to 95% of the cross-sectional area of the heat storage tank.

The second invention of the present invention is a thermal storage system comprising at least a thermal storage tank, a heating medium pump, a heating means, a heat exchanger and a line connecting these, wherein the thermal storage tank has Heat storage in which a cylindrical metal container filled with a heat storage agent or a cold storage agent is arranged so as not to contact, and the total cross-sectional area of the cylindrical metal container in the cross section of the tank is 50% to 95% of the cross-sectional area of the tank. This is a thermal heat storage system characterized by using a tank.

A third invention of the present invention is a cold heat storage system comprising at least a cold heat storage tank, a heat medium pump, a refrigeration unit, a heat exchanger and a line connecting these, wherein the cold heat storage tank has Heat storage in which a cylindrical metal container filled with a heat storage agent or a cold storage agent is arranged so as not to contact, and the total cross-sectional area of the cylindrical metal container in the cross section of the tank is 50% to 95% of the cross-sectional area of the tank. A cold heat storage system characterized by using a tank.

According to a fourth aspect of the present invention, the heat medium heated by the heating means is circulated to a heat storage tank filled with a heat storage agent to store heat, and thereafter, the load fluid is heated by the stored energy, thereby heating the load fluid. This is a heating method characterized by reducing the load of the heating.

According to a fifth aspect of the present invention, the heat medium cooled by the cooling means is circulated through a heat storage tank filled with a cold storage agent to store cold, and thereafter, the load fluid is cooled by the stored energy. This is a cooling method characterized by reducing the load on the cooling means.

According to the present invention, a heat storage tank in which a cylindrical container filled with a regenerator or a heat storage agent is not in contact with and uniformly arranged, wherein the total cross-sectional area of the cylindrical container in the cross section of the heat storage tank is the cross-sectional area of the heat storage tank. A heat storage tank characterized by being 70% to 90% and a heat storage system using the same can be provided. When the heat storage tank of the present invention is used, it is possible to efficiently carry out cold heat storage or hot heat storage, and to construct a heat storage system that is advantageous in terms of energy.

A first invention of the present invention is a heat storage tank in which a cylindrical metal container filled with a heat storage agent or a cold storage agent is arranged so as not to contact with the inside of the tank, and the cylindrical metal container in a cross section of the heat storage tank Is 50% to 95% of the cross sectional area of the heat storage tank. Hereinafter, the heat storage tank of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a front elevation view of the heat storage tank of the present invention, and FIG. 2 is a plan view of the heat storage tank cut along AA. In the figure, reference numeral 1 denotes a heat storage tank in which a large number of cylindrical metal containers 2 are uniformly arranged by positioning bars 3 so as not to contact each other. The shape of the container used in the present invention is not particularly limited as long as it is cylindrical. For example, a cylindrical or rectangular container is used. A container formed by partitioning a metal plate into a rectangular tube shape may be used. Among them, a cylindrical container is practical and preferable.

通常 As the material of the metal container used in the present invention, a stainless steel material is usually used. When an alkaline heat storage agent is used, a nickel material is preferably used to reduce corrosion.

熱 It is important that the heat storage tank of the present invention is arranged so that the total cross-sectional area of the tubular container is a specific ratio of the cross-sectional area of the heat storage tank in the cross section of the heat storage tank. If the ratio of the total cross-sectional area of the cylindrical container is too small, the heat storage capacity becomes small, and if it is too large, the heat medium becomes difficult to flow, the heat transfer capacity becomes insufficient, and the cold storage or heat storage capacity becomes small. In the tank, the tubular container is arranged so that the total sectional area of the tubular container is 50% to 95% of the sectional area of the heat storage tank. With such an arrangement, the heat storage or cold storage efficiency is greatly increased.

The diameter of the cylindrical metal container is preferably 20 mm or more in terms of thermal aspect. The diameter of the metal container in the present invention means the diameter as it is when the shape of the metal container is a perfect circle, and means the minor axis when there is a major axis and a minor axis such as an elliptical shape. In the case of a rectangular tube shape, it refers to the smaller side. In the case where the metal container has a complicated shape, the hydraulic fluid diameter may be obtained by quadrupling the hydraulic fluid radius obtained by dividing the cross-sectional area of the flow by the peripheral length of the fluid. The length of the cylindrical container is not limited, and may be appropriately determined according to the scale of the heat storage system.

場合 When the diameter of the cylindrical container is large, it is preferable to provide a metal subdivision plate radially inside the metal container because the heat transfer efficiency can be increased. The subdivision plate may be in the form of a lattice. It is preferable to provide the subdivision plate so that the longest distance between the subdivision plates is 50 mm or less, since the heat transfer efficiency is further improved. Depending on the thermal conductivity of the heat storage agent or the cold storage agent, for example, when naphthalene is used as the heat storage agent and the subdivision plates are provided so that the longest distance between the subdivision plates is 50 mm or less, heating is performed within about 5 hours. It becomes possible. If naphthalene is used as a heat storage agent and is arranged so that the longest distance between the subdivision plates is 20 mm or less, the heat transfer efficiency is further improved, and for example, heating can be performed within about 2 hours.

Further, an example of the relationship between the longest distance of the preferred subdivision plates are a heat storage agent or refrigerant 13A, methanol aqueous solution, barium hydroxide (Ba (OH) 2 · 8H 2 O) a cold storage agent or heat storage agent The maximum distance between subdivision plates is 40 to 50 mm when tetradecane or naphthalene is used as a regenerator or heat storage agent, and the maximum distance between subdivision plates is 20 to 30 mm. FIG. 3 shows an example in which a radial subdivision plate is provided in a cylindrical container. The lower side is a front elevation view, the upper side is a plan view, 10 is a cylindrical container, and 11 is a radial subdivision plate.

投入 It is preferable to add a metal filler into the metal container because the heat transfer efficiency can be increased. The shape of the metal packing is not particularly limited, and examples thereof include a bell saddle, a McMahon, and a spiral pack used for a packing tower and the like. A heat storage agent or a cold storage agent is loaded and used in a cylindrical metal container. The effect becomes more remarkable as the filling ratio of the metal filling in the metal container becomes larger, but practically about 90% of the filling is carried out. In FIG. 2, 4 is a perforated plate, and 5 is a heat medium inlet.

In the heat storage tank of the present invention, the solvent is arranged to flow around the metal container so that the cylindrical containers filled with the heat storage agent or the cold storage agent do not contact each other. In order for the solvent to flow smoothly around the metal container, it is desirable to arrange the metal containers as uniformly as possible. For such an arrangement, it is preferable to use a positioning bar, as shown in FIG. 1 or FIG. Although the material of the positioning bar is not particularly limited, a metal material is usually used. Although the shape of the positioning bar is not particularly limited, it is generally formed in a lattice shape from the viewpoint of manufacturing.

FIG. 4 is a front elevation view of another heat storage tank, which is an example in which the containers are configured in two stages. FIG. 5 is a plan view of the heat storage tank taken along line BB. 20 is a heat storage tank, 21 is a positioning bar, and 22 is a perforated plate. Reference numeral 23 denotes a small container, and 24 denotes a large container. In order to arrange the containers uniformly, it is preferable to incorporate such a small container for adjustment. 25 is a receiving plate of the container, 26 is a heat medium inlet, 27 is a gantry, and 28 is a heat medium outlet. Although the storage heat tank of the present invention is illustrated as an example of a vertical type, a horizontal type can also be used. In the present invention, the total cross-sectional area of the cylindrical container is disposed so as to be 50% to 95% of the cross-sectional area of the heat storage tank, but the cross section of the heat storage tank may be a horizontal cross section or a vertical cross section. Good. The heat storage tank of the present invention is specifically used as a hot heat storage tank or a cold heat storage tank.

The second invention of the present invention is a thermal storage system comprising at least a thermal storage tank, a heating medium pump, a heating means, a heat exchanger and a line connecting these, wherein the thermal storage tank has Heat storage in which a cylindrical metal container filled with a heat storage agent or a cold storage agent is arranged so as not to contact, and the total cross-sectional area of the cylindrical metal container in the cross section of the tank is 50% to 95% of the cross-sectional area of the tank. This is a thermal heat storage system characterized by using a tank. FIG. 6 shows an example of the thermal storage system of the present invention.

に お い て In FIG. 6, reference numeral 30 denotes a heat storage tank. The right side of the figure is a heat storage unit composed of a heat medium circulation pump 32, a heating means 31, and a heat storage circulation line 33, and the left side of the figure is a heat medium circulation pump 35, a heat exchange unit 34, and a heat radiation circulation line. This is a heat radiating section composed of 36. As the heating means 31, a boiler provided with a peripheral device such as an alarm device for various abnormalities such as pressure and temperature, an electric heater, and the like can be used. Waste heat from the plant can also be used. 37 is a fluid such as air for heat exchange.

In FIG. 6, the cold heat storage unit on the right and the heat radiating unit on the left are separately described. However, heat storage and heat radiation may be performed by using a common heat medium circulation pump and branching one line. As described above, the thermal heat storage system has been specifically described with reference to FIG. 6. At least, a third embodiment of the present invention is a cold heat storage tank, a heat medium pump, a refrigeration unit, a heat exchanger, and a line connecting these. A cold heat storage system comprising: as the cold heat storage tank, in the tank, a cylindrical metal container filled with a heat storage agent or a cold storage agent is arranged so as not to contact, and a cylindrical shape in the cross section of the tank Regarding a cold heat storage system using a heat storage tank in which the total cross-sectional area of the metal container is 50% to 95% of the tank cross-sectional area, the warm heat storage tank is a cold heat storage tank, the heat radiation is heat absorption, and the heating means is a freezing means. Since the cold heat storage system can be described in exactly the same way, illustration and description of the cold heat storage system are omitted. As the refrigerating means, a refrigerating machine is usually used, and generally includes a compressor, a condenser, a decompression device, an evaporator, and a refrigerant pipe connecting these.

Hereinafter, the thermal storage system of the present invention will be described more specifically by taking a hot water supply system as an example. Generally, in a hot water supply system such as a large bathroom, the time for using hot water is concentrated, and the load of hot water varies greatly. Therefore, the heating equipment is designed and installed to withstand the maximum load fluctuation. The heating equipment is desirably operated as stable as possible from the viewpoint of thermal efficiency and prevention of failure of the heating equipment. However, the operating rate of the heating equipment such as a large bath is low, That is, at present, the number of times of starting and stopping is large.

Especially, when the required heat is supplied by controlling the number of heating equipment, it is important to reduce the number of start and stop. If control is performed to set the delay time in order to reduce the number of times of starting and stopping, the load response becomes poor, and hot water of an appropriate temperature may not be obtained. There is an example in which a hot water storage tank is installed as a means for solving this, but since this is simply storing hot water, the heat storage capacity is small, and a satisfactory hot water supply system has not always been obtained. In the thermal energy storage system according to the present invention, since the phase change type thermal storage agent is used, the heat capacity is large and the temperature of the hot water storage tank can be kept constant. By providing such a hot water storage tank, the heating equipment can be operated stably. be able to.

FIG. 7 is a conceptual diagram showing such a hot water supply system, and 38 is a hot water storage tank filled with a phase change type heat storage agent. The hot water storage tank forms a heat storage section with the heat medium circulation pump 39, the heat storage circulation line 40, the boilers 42 to 45, etc., and heat is stored in the heat storage agent filled in the hot water storage tank. Reference numeral 41 denotes a makeup water tank, and reference numerals 46 to 49 denote temperature control systems such as TICs. For example, the temperature of hot water from the boiler is set higher than the phase change temperature of the heat storage agent, or the number of operating boilers is controlled according to the difference between the temperature of hot water entering the boiler and the temperature of hot water from the boiler.

(1) First, the thermal storage unit including the hot water storage tank, the heat medium circulation pump, the heat storage circulation line, and the boiler is operated to store heat in the heat storage agent filled in the hot water storage tank. As described above, since FIG. 7 is a conceptual diagram of the hot water supply system, auxiliary devices such as a switching valve are not shown. After storing heat in the heat storage agent filled in the hot water storage tank, the heat medium circulation pump 50 is operated to switch the heat storage circulation line 40 to the heat radiation circulation line 51. Circuits used for, for example, men's baths, women's baths, various types of temperature control, and the like are connected to the heat radiation circulation line, and are used after being appropriately heat-exchanged. 52 to 55 are such heating circuits.

56 to 59 are heat exchangers, 60 to 63 are heat receiving circuits on the user side, and 64 to 67 are temperature control systems such as TIC. For example, the temperature of the heat receiving circuit on the user side is detected by detecting the temperature of the heat receiving circuit on the user side. The supply amount of the heating medium is controlled. FIG. 7 shows an example in which the thermal energy storage system of the present invention is used as a hot water supply system. However, when the cold thermal energy storage system of the present invention is used as a cooling system, the heat storage agent is used as a cold storage agent, and the boiler is provided with cooling means such as a refrigerator. By doing so, it can be applied in exactly the same way, and the description is omitted. Although FIG. 7 shows a case where there is only one hot water storage tank, a plurality of hot water storage tanks may be used if necessary.

In the heating and cooling method of the present invention, the heat storage tank is uniformly arranged so that the cylindrical container filled with the heat storage agent does not contact, and the total cross-sectional area of the cylindrical container in the cross section of the heat storage tank is the cross-sectional area of the heat storage tank. It is preferably set to 70% to 90%.

(4) The filling ratio of the heat storage agent or the cold storage agent used in the heat or cold heat storage system and the heating / cooling method of the present invention to the container is preferably 80% or more, and the volume ratio of the upper space is preferably 10% or less. When the heat storage agent or the cold storage agent is filled in liquid, the filled volume represents the filling ratio as it is, but the filling ratio when the solid heat storage agent or the cold storage agent is filled in the container is filled using a funnel or the like. It means the apparent filling volume ratio.

潜 As the heat storage agent or the cold storage agent, a latent heat type organic compound or inorganic compound can be used. As a heat storage agent or a cold storage agent, use a safe one in consideration of physical properties such as melting point, specific gravity, boiling point, heat of fusion, thermal conductivity, environment, corrosion, availability, and cost. Should be selected. If the freezing point of the heat storage agent or the cold storage agent is too close to the freezing point of the heat medium, the operation may be difficult. If the freezing point of the heat storage agent or the cold storage agent and the freezing point of the heat medium are too far apart, there is no energy advantage, so that the difference between the freezing point of the heat storage agent or the cold storage agent and the freezing point of the heat medium is at least 5 ° C. It is preferable to use an agent or a regenerator. The difference between the freezing point of the heat storage agent or the cold storage agent and the freezing point of the heat medium is more preferably 100 ° C. or less.

Examples of the organic compound used for the heat storage agent or the cold storage agent include cyclohexane, benzene, p-chlorotoluene, n-decanol, tetradecane, tert-butanol, undecanol, n-dodecanol, tetradecanol, cyclohexanol, α-terpineol, 1,4-dioxane, phorone, acetophenone, butyl stearate, amyl stearate, benzyl benzoate, ethyl cinnamate, dibutyl tartrate, dimethyl phthalate, ethylene glycol monophenyl ether, diethylene glycol acetate, glycerin, naphthalene, ethylene diamine, methanol An aqueous solution and the like can be exemplified.

In the present invention, when an organic compound is used as a heat storage agent, naphthalene is preferable, and when an inorganic compound is used, it is preferable to use a hydrate of the inorganic compound. As the hydrate of an inorganic compound can be exemplified by barium hydroxide _{[Ba (OH) 2 · 8H 2} O ], sodium acetate _{(CH 3 COONa · 3H 2 O} ). When a hydrate of an inorganic compound is used, care must be taken in controlling the moisture and atmosphere, and it is preferable to use a closed container. In the present invention, when an organic compound is used as a cooling agent, ethylenediamine, tetradecane, and an aqueous methanol solution are preferable.

Examples of the heat medium used in combination with the heat storage agent or the cold storage agent include various hydrocarbons, alcohols, esters, water, mixtures thereof, carbon dioxide gas, ammonia gas, and the like. Is preferably 10 poise or less. Water or an aqueous methanol solution is a preferred heat medium in this respect, operability, safety, and cost. Therefore, it is preferable to use water as a heat medium in a warm heat storage system, and it is preferable to use water or an aqueous methanol solution as a heat medium in a cold heat storage system. Hereinafter, the present invention will be described more specifically with reference to Examples, but the present invention is not limited thereto.

Example 1
A stainless-steel cylindrical container having a diameter of 200 mm and a length of 600 mm is filled with liquid tetradecane so as to have a concentration of 90%, and a grid-like positioning bar is used to completely cut the cylindrical container as shown in FIGS. The heat storage tanks were arranged uniformly so that the area was 80% of the cross-sectional area of the heat storage tanks. Water was used as the heat medium, and the heat medium was circulated using the heat storage circulation line while maintaining the temperature of the heat medium at 4 ° C. according to the flow shown in FIG. After the tetradecane was frozen, the circulation line was switched to a heat-release circulation line. The animal heat efficiency is indicated by the time until a heat exchange fluid such as air can be cooled or heated. The heat medium was passed through a plate-type heat exchanger to exchange heat with air at 25 ° C. As a result, cooling air at 18 ° C was obtained stably. The calorific value in this case was 40 kcal / L (liter).

Examples 2 to 4
The heat storage agent, the filling ratio of the heat storage agent, the upper space volume ratio, the container cross-sectional area ratio, and the subdivision plate were as shown in Table 1, and heat exchange was performed with water for heat storage and air for cold storage. Examples 2 to 4 were operable stably in all cases.

Comparative Examples 1-3
When the storage heat operation was performed with the container cross-sectional area ratio as shown in Table 1, the storage heat amount was small or the heat transfer was poor.

Example 5
A cylindrical container was prepared from a 40A stainless steel tube, and the operation was carried out in the same manner as in Example 4 except that the subdivision plate was not used. As a result, the operation was stable.

Example 6
Diameter 200 mm, stainless steel cylindrical container of barium hydroxide _{[Ba (OH) 2 · 8H 2} O, the phase change temperature 78 ° C.] of length 600mm was filled so that the 90%, the lattice-shaped positioning bar As shown in FIGS. 4 and 5, the heat storage tanks were uniformly arranged so that the total cross-sectional area of the cylindrical containers was 80% of the cross-sectional area of the heat storage tank. Using water as the heat medium, the hot water supply system was operated according to the flow shown in FIG.

Using four heavy oil once-through hot water boilers (one spare) equipped with a boiler start / stop delay timer and hot and cold alarms for hot water and hot water, set the boiler hot water temperature to 80 ° C, When the difference exceeds 20 ° C, three units are operated. When the difference exceeds 15 ° C, two units are operated. When the difference exceeds 10 ° C, one unit is operated. .

(4) After the barium hydroxide was melted, the circulation line was switched to a heat-release circulation line. In this case, the calorie of the container was 139 kcal / L (liter). When hot water was passed through the first to fourth heat exchangers and applied to a 45 ° C male bath, a 45 ° C female bath, a 55 ° C hot water supply facility, and a 60 ° C air conditioner, stable operation was possible.

When the heat storage tank of the present invention is used, the heating and cooling method can be efficiently performed, and a heat storage system that is advantageous in terms of energy can be constructed. Therefore, the heat storage tank is preferably applied to a hot water supply system for a large bathroom, various temperature control, and the like. can do.

It is a front elevation view which shows an example of a heat storage tank. It is a top view of the heat storage tank of FIG. It is an example of a container used for a heat storage tank. It is a front elevation view showing other examples of a heat storage tank. It is a top view of the heat storage tank of FIG. It is an example of a heat storage system. It is an example of a hot water supply system.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 Heat storage tank 2 Container 3 Positioning bar 4 Perforated plate 5 Heat medium inlet 10 Container 11 Radial subdivision plate 20 Heat storage tank 21 Subdivision plate 22 Perforated plate 23 Small container 24 Large container 25 Receiving plate 26 Heat medium inlet 27 Mount 28 Heat medium outlet Reference Signs List 30 heat heat storage tank 31 heating means 32 heat medium circulation pump 33 heat storage circulation line 34 heat exchange unit 35 heat medium circulation pump 36 heat radiation circulation line 37 heat exchange fluid
38 Hot water storage tank 39 Heat medium circulation pump 40 Heat storage circulation line 41 Makeup water tank 42 First boiler 43 Second boiler 44 Third boiler 45 Fourth boiler 46 Temperature control device 47 Temperature control device 48 Temperature control device 49 Temperature control device 50 Heat Medium circulation pump 51 Radiation circulation line 52 First heating circuit 53 Second heating circuit 54 Third heating circuit 55 Fourth heating circuit 56 First heat exchanger 57 Second heat exchanger 58 Third heat exchanger 59 4th heat exchanger 60 1st heat receiving circuit 61 2nd heat receiving circuit 62 3rd heat receiving circuit 63 4th heat receiving circuit 64 temperature control device 65 temperature control device 66 temperature control device 67 temperature control device

Claims (29)

A heat storage tank in which a cylindrical metal container filled with a heat storage agent or a cold storage agent is arranged so as not to come into contact with the heat storage agent, and the total cross-sectional area of the cylindrical metal container in the cross section of the heat storage tank is the heat storage tank cross-sectional area. 50% to 95% of the heat storage tank. 熱 The heat storage tank according to claim 1, wherein the diameter of the cylindrical metal container is 20 mm or more. (3) The heat storage tank according to (1) or (2), wherein a subdivision plate is provided inside the cylindrical metal container. (4) The heat storage tank according to (3), wherein the subdivision plate is radial. (4) The heat storage tank according to (3), wherein the subdivision plate has a lattice shape. 熱 The heat storage tank according to any one of claims 3 to 5, wherein the longest distance between the subdivision plates is 50 mm or less. (7) The heat storage tank according to any one of (1) to (6), wherein a metal filling is provided inside the cylindrical metal container. (8) The heat storage tank according to any one of (1) to (7), wherein a metal filler is provided outside the cylindrical metal container. 熱 The heat storage tank according to any one of claims 1 to 8, wherein the heat storage tank is a heat storage tank. 熱 The heat storage tank according to any one of claims 1 to 8, wherein the heat storage tank is a cold heat storage tank. A thermal storage system comprising at least a thermal storage tank, a heating medium pump, a heating means, a heat exchanger and a line connecting these, wherein the storage tank is filled with a thermal storage agent or a cold storage agent as the thermal storage tank. A heat storage tank is used in which the cylindrical metal containers are arranged so as not to contact each other, and the total cross-sectional area of the cylindrical metal container in the cross section of the tank is 50% to 95% of the cross-sectional area of the tank. Thermal storage system. A cold heat storage system comprising at least a cold heat storage tank, a heat medium pump, a refrigeration unit, a heat exchanger and a line connecting these, and as the cold heat storage tank, the tank is filled with a heat storage agent or a cold storage agent. A heat storage tank is used in which the cylindrical metal containers are arranged so as not to contact each other, and the total cross-sectional area of the cylindrical metal container in the cross section of the tank is 50% to 95% of the cross-sectional area of the tank. Cold heat storage system. The heat storage system according to claim 11 or 12, wherein the filling ratio of the heat storage agent or the cold storage agent into the container is 80% or more, and the volume ratio of the upper space is 10% or less. The heat storage system according to any one of claims 11 to 13, wherein the difference between the freezing point of the heat storage agent or the cold storage agent and the freezing point of the heat medium is at least 5 ° C. The heat storage system according to any one of claims 11, 13 and 14, wherein the heat storage agent is naphthalene. The heat storage system according to any one of claims 11, 13 and 14, wherein the heat storage agent is a hydrate of an inorganic compound. Hydrates of inorganic compounds, thermal storage system of claim 16, wherein the barium hydroxide _{(Ba (OH) 2 · 8H} 2 O) or sodium acetate _{(CH 3 COONa · 3H 2 O} ). The heat storage system according to claim 12, wherein the regenerator is an aqueous solution of ethylenediamine, tetradecane, or methanol. The heat storage system according to any one of claims 11 to 18, wherein the viscosity of the heat medium at a use temperature is 10 poise or less. 20. The heat storage system according to claim 19, wherein the heat medium is water or an aqueous methanol solution. The heat medium heated by the heating means is circulated through the heat storage tank filled with the heat storage agent to store heat, and thereafter, the load of the heating means is reduced by heating the load fluid with the stored energy. Heating method. The heat medium cooled by the cooling means is circulated through a heat storage tank filled with a regenerator to cool the heat, and thereafter, the load of the cooling means is reduced by cooling the load fluid with the stored energy. How to cool. The heat storage tank is a heat storage tank in which a cylindrical metal container filled with a heat storage agent or a cold storage agent is arranged so as not to come into contact with the heat storage tank, and a total cross-sectional area of the cylindrical metal container in a cross section of the heat storage tank. The heating or cooling method according to claim 21 or 22, wherein is 50% to 95% of the cross-sectional area of the heat storage tank. 24. The heating or cooling method according to any one of claims 21 to 23, wherein the filling ratio of the heat storage agent or the cold storage agent into the container is 80% or more, and the volume ratio of the upper space is 10% or less. The heating or cooling method according to any one of claims 21 to 24, wherein the difference between the freezing point of the heat storage agent or the cold storage agent and the freezing point of the heat medium is at least 5 ° C. 26. The heating method according to claim 21, 23, 24 or 25, wherein the heat storage agent is naphthalene. 26. The heating method according to claim 21, 23, 24 or 25, wherein the heat storage agent is a hydrate of an inorganic compound. Hydrates of inorganic compounds, barium _{(Ba (OH) 2 · 8H} 2 O) or sodium hydroxide acetate _{(CH 3 COONa · 3H 2 O} ) a method of heating according to claim 27, wherein. The cooling method according to claim 22, 23, 24 or 25, wherein the regenerator is an aqueous solution of ethylenediamine, tetradecane or methanol.

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