JPH0443291A - Heat storage element - Google Patents

Abstract

PURPOSE:To enable high-temperature heat storage and take out hot-water or vapor efficiently through heat medium such as heat resistant oil or the like by filling a vessel having a heat resistant property with heat storage bricks. CONSTITUTION:A heat storage element 1 is constituted of a hollow metallic pipe (vessel) 3 filled with heat resistant bricks 2 and lids 4, plugging both end openings of the metallic pipe 3 to intercept the heat resistant bricks 2 in the metallic pipe 3 from environment. When the heat storage element 1 is heated by a sheath heater or the like from the outside of the metallic pipe 3, the temperature of the heat storage bricks 2, filled into the metallic pipe 3, is increased together with the temperature rise of the metallic pipe 3 whereby high- temperature heat is stored. Heat storage energy, stored in the heat storage bricks 2, is taken out by the heat resistant oil (heat medium) flowing though the outside of the metallic pipe 3 as hot-water or vapor and is utilized for heating and other usage.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a heat storage element that can store heat for use in daytime air conditioning or regeneration by utilizing late-night electricity or high-temperature waste heat.

"Conventional Technology" Creating demand for late-night electricity is extremely important for improving the efficiency of power generation equipment and achieving load leveling between day and night.

A commonly known method for using this late-night electricity during the day is to store high-temperature heat in a heat storage body. Bricks are used. In addition, there is a regenerator heater as a device that uses bricks as a heat storage source, but it is only used in some areas, such as elementary schools, nursing homes, and hospitals.

[Problems to be solved by the invention]However, the bricks used in the conventional heat storage body are
Although it has the advantage of being able to store heat up to around 0°C and has a high heat storage capacity per unit volume, on the other hand, because the heat storage temperature is high, in the conventional heat storage heater using a brick heat storage body, the heat storage capacity is high. The heat extraction method was only possible using air, and the stored energy could not be extracted as hot water or steam. Therefore, as mentioned above, they are used only for heaters, which is one of the reasons why heat storage devices using bricks are not becoming more popular in Japan.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a heat storage element that is capable of storing high-temperature heat and efficiently extracting hot water and steam using a heat medium such as heat-resistant oil.

"Means for Solving the Problems" A heat storage element according to the present invention is formed by filling a heat-resistant container with heat storage bricks.

Note that it is desirable that the container covers the entire surface of the heat storage brick. Further, it is preferable that the container is made of a metal body or a glass body. Further, a passage may be formed in the container through which a heat medium for heat exchange passes, and
A heat transfer wire for heating may be incorporated into the container.

``Operation'' When the container is heated from the outside, the heat storage bricks inside are heated and store high temperature heat, and function as a heat storage body. Thereby, thermal energy can be efficiently extracted as hot water or steam using a heat medium such as heat-resistant oil flowing outside the container.

Embodiment FIG. 1 shows a first embodiment of the present invention, and in the figure, reference numeral 1 indicates a heat storage element according to the present invention.

This heat storage element 1 is constructed by connecting a heat-resistant brick 2 to a hollow metal vibrator (
A container) 3 is filled with the metal pipe 3, and the openings at both ends of the metal pipe 3 are closed with lids 4, and the heat-resistant brick 2 inside the metal pipe 3 is isolated from the outside.

The metal vibrator 3 is formed into a cylindrical shape and has a hollow structure from a thin plate of sea bream or steel, and the lid 4 is also made of the same metal as the metal vibrator 3.

The heat storage brick 2 can be selected from various types such as magnesia type, alumina type, and zircon type depending on its type and the temperature range in which it is used, and depending on the melting point of the metal vibrator 3, it is possible to store heat at a higher temperature.

Note that the shape of the metal vibrator 3 is preferably a pipe shape as in this embodiment from the viewpoint of efficient heat storage and heat extraction, and the size, thickness, The length is determined by taking into consideration the appropriate amount of energy per piece, and can be set arbitrarily.

Next, the assembly method and operation of the heat storage element 1 having the above structure will be explained.

To assemble the heat storage element 1, first, a molten heat storage brick 2 is press-fitted from the other opening of the metal vibrator 3 with one end closed, and at the same time, the heat storage brick 2 is heated and sintered from the outside of the metal vibrator 3. let At this time, steam generated during sintering of the heat storage brick 2 is released to the outside from the opening at the other end.

Next, the lids 4 are screwed onto both ends of the metal vibrator 3 containing the heat storage brick 2 sintered integrally with the metal vibrator 3 from the left and right, thereby completing the assembly of the heat storage element 1.

The heat storage element 1 assembled in this way is attached to a metal vibrator 3.
When heated from the outside with a sheathed heater or the like, the temperature of the metal vibrator 3 rises, and the temperature of the heat storage bricks 2 filled inside also rises, and high-temperature heat is stored. During such heat storage, since the thermal expansion coefficient of the heat-resistant brick 2 is much smaller than that of the metal vibrator 3, there is no fear that the metal vibrator 3 will burst. In addition, the heat storage energy stored in the heat storage brick 2 is extracted as hot water or steam by heat-resistant oil (heat medium) flowing outside the metal vibrator 3, and is used for heating and other purposes. In this case, since the entire surface of the heat storage brick 2 is covered with the metal tape 3, there is no fear that the heat storage brick 2 will be attacked by heat-resistant oil, and there is no fear that the heat storage efficiency will decrease due to constant use.

The heat storage element l of this embodiment uses an inexpensive brick as a heat storage source, and the metal vibrator 3 has a simple structure and can be manufactured in large quantities, so the initial cost can be reduced, and the metal vibrator 3 is integrated with the metal vibrator 3. Since the heat storage brick 2 is maintenance-free, it has the advantage of requiring no maintenance costs.

Although the heat storage element l functions as a heat storage body when used alone, it may be used in combination with a large number of elements, and can also be used as a heat storage type heating device for home use. In short, the quantity etc. may be determined as appropriate depending on the purpose of use and form of use.

FIG. 2 shows a second embodiment of the present invention. In the heat storage element 5 of this embodiment, a glass body 6 having excellent heat resistance is used for the container. The structure is such that the entire surface of the heat storage brick 2 is covered.

To manufacture the heat storage element 5 of this embodiment, first the heat storage brick 2
It is semi-fired into a rod shape, and at the finishing stage it is immersed in a glass solution for final sintering. By this operation, the surface of the heat-resistant brick 2 is coated with glass, and the heat-storage brick 2 can be easily shielded from the outside and direct contact with the outside can be avoided. Also,
Since the glass body 6 can be integrally molded, it can be mass-produced and the manufacturing cost is low. In this embodiment, the surface of the heat-resistant brick 2 was treated with glass, but the same effect can be expected by using a metal or a new material with excellent heat conductivity.

FIG. 3 shows a third embodiment of the present invention. The heat storage element 7 of this embodiment has a passage 8 formed inside a metal pipe 3 through which a heat medium for heat exchange passes. That is, a small diameter hollow metal pipe 9 is inserted into the inside of the metal pipe 3 to form a double pipe, this metal pipe 9 forms the passage 8, and a heat-resistant brick is placed around the metal pipe 9. 2 is filled, and both ends of the metal pipe 9 are filled with the outer metal pipe 3.
It has a configuration in which it passes through M4.4 which closes both ends of the tube and is opened to the outside.

In the heat storage element 7 of this embodiment, since the heat medium passes through the passage 8 inside the metal pipe 3 as well as the outside of the metal pipe 3, the surface area of the metal pipe for heat exchange is expanded and the heat exchange efficiency is increased. This makes it possible to more efficiently extract stored energy through the heat medium.

FIG. 4 shows a fourth embodiment of the present invention. The heat storage element 10 of this embodiment has a heater 11 for direct heating installed inside a metal pipe 3 at the center of a heat storage brick 2. be.

The heat storage element 10 of this embodiment heats the heat storage brick 2 directly from the center of the heat storage brick 2 without going through the metal pipe 3 from outside the metal pipe 3, so it has the advantage that the heat storage efficiency can be further increased.

The heat storage element of the present invention can be used to store heat using cheap late-night electricity, and extract the stored energy as hot air for daytime heating equipment, as well as for domestic water use or absorption refrigeration by extracting it as hot water. machine heat source,
Furthermore, by extracting it as steam, it can be used to drive a steam turbine, regenerate electricity, and use it as electricity, making it widely applicable for various purposes.

In addition, the heat storage element in the above embodiment is a heat storage, a brick 2
The heat storage brick 2 was designed to be covered with metal or glass.
When not covered, the heat exchange efficiency can be improved by using a double layer that expands the surface area by providing an uneven shape on the outer surface.

"Effects of the Invention" As explained in detail above, according to the heat storage element of the present invention, the heat storage bricks are filled in a heat-resistant container, so that the heat storage energy after heat storage can be used as in the conventional case. It is possible to extract not only hot air but also hot water and steam via a heat medium passing outside the container. This results in
It is an excellent heat storage source for various purposes, such as storing heat using cheap late-night electricity and using it as a heat source during the day, or driving a steam turbine to regenerate electricity.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a heat storage element showing a first embodiment of the invention, FIG. 2 is a sectional view of a heat storage element showing a second embodiment of the invention, and FIG. 3 is a sectional view of a heat storage element showing a third embodiment of the invention. FIG. 4 is a sectional view of a heat storage element showing a fourth embodiment of the present invention. l, 5.7, IO... Heat storage element, 2...
・Heat storage bricks,

Claims (5)

[Claims] (1) A heat storage element formed by filling a heat-resistant container with heat storage bricks. (2) The heat storage element according to claim 1, wherein the container covers the entire surface of the heat storage brick. (3) The heat storage element according to claim 1, wherein the container is made of a metal body or a glass body. (4) The heat storage element according to claim 1, wherein a passage through which a heat medium for heat exchange passes is formed in the container. (5) The heat storage element according to claim 1, wherein a heat transfer wire for heating is incorporated in the container.