JPS635676B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat storage device that can store heat using chemical reactions.

As part of energy saving technology, various energy storage and heat storage technologies have been researched and developed, and various methods have been proposed. Heat storage technology is classified into (a) sensible heat storage, (b) latent heat storage, (c) chemical reaction heat storage, etc., and (c) can transport heat using heat storage materials that have the characteristic of maintaining heat storage even at room temperature. A heat storage device is being considered.

That is, the following reversible reaction A・B+QA+B (1) Suppose we have a reaction system like this.

In the heat storage process, energy Q is added to substances A and B to decompose them into substances A and B, which are then separated and stored. Q
Usually, thermal energy is considered, but other energies such as light and electricity can also be used.

In the heat dissipation step, when heat is required, reaction heat Q is generated by reacting substances A and B, and the heat is extracted.

At this time, if substances A and B are stored in a state where no chemical changes occur, even if there is a time or place gap between the heat storage process and the heat release process, the storage and
Since the heat radiation cycle is established, heat transport is possible.

Note that the substances A and B are used in a state in which A and B are easily separated, ie, in a state in which they have different phases, such that A is a solid and B is a liquid or gas. For example, A may be sodium sulfide, and B may be water (steam).

The present invention relates to a heat storage device that is implemented under the following limited conditions among such general heat storage techniques that utilize the heat of chemical reaction.

(1) The heat storage process is carried out at location X, where a surplus heat source such as waste heat exists, and the heat dissipation process is carried out at location Y, where the heat generated by reacting A and B is used as the heat source. Transport the material stored in heat at location X to Y,
Heat is released, and after heat release, the heat storage material is transported back to X for restorage.

(2) The heat storage materials to be transported are considered to be A and B, or A. That is, reactant B is a substance such as water vapor that is normally easily available or discarded, and X
If B separated at is available without having to be transported to Y, the heat dissipation reaction will be possible, so in this case it is only necessary to transport A. The present invention relates to the transportation of only the heat storage material A, regardless of whether or not B is transported.

(3) Under the reaction conditions, substances A, B and A
is a solid particle and B is a gas. That is, when the heat storage substance A comes into contact with air for a long period of time, it reacts with oxygen, carbon dioxide, moisture, etc. in the air, and changes in quality or radiates heat. The present invention is particularly effective against substances that are harmful when they come into contact with the human body.

When constructing a heat storage system under the above conditions, the heat storage tank is normally transported, and this will be explained using FIG. 1 as an example. FIG. 1 is a sectional view of a heat storage tank, where 1 represents the heat storage tank body, 2 represents heat transfer tubes in the case of a multi-tubular heat exchanger, and heat transfer plates in the case of a plate heat exchanger. 3 is a heat exchange fluid inflow part to the heat storage tank, 4 is a heat exchange fluid outlet part, 5 is a heat storage material filling part separated from the heat exchange fluid by a heat transfer tube or heat transfer plate 2, and 6 is a heat storage material filling part 5
This is the section where steam enters and exits.

The heat storage process is as follows. That is, since a surplus heat source exists at the location X based on the above condition (1), this heat is introduced from the inflow portion 3 to the heat storage tank via the fluid heat medium. The heat medium is a heat transfer tube or heat transfer plate 2
After imparting heat to the particle layer in the filling part 5 through the heat transfer wall surface while passing through the inside, the particles are discharged from the outflow part 4.
This applied heat causes a reaction from left to right in reaction formula (1), producing a solid A and a gas B. The generated gas B is discharged to the outside of the heat storage tank through the valve 7 attached to the steam inlet/outlet part 6, and is transferred to a storage part (not shown) through operations such as condensation by cooling, liquefaction by compression, and absorption by an absorbent. stored in When the reaction is completed, the valve 7 is closed to isolate the filling section 5 from the outside air, and the heat exchange fluid inflow section 3, outflow section 4, and valve 7 are separated from the piping section (not shown) that connects them. .

In the transportation process, the heat storage tank part shown in Figure 1,
If necessary, the storage portion of B is transported from X to Y by some means of transportation, such as a truck or a railway.

The heat dissipation process is as follows. That is, location Y
, the inflow part 3 is connected to the inflow pipe part of the heat medium for recovering heat, and the outflow part 4 is connected to the discharge pipe part, and the valve 7 is connected to the introduction part of gas B (or to the storage part of B transported at the same time). ).
Then, when the valve 7 is opened while the heat recovery medium is flowing from the inflow part 3 to the outflow part 4, the gas B flows into the heat storage material filling part 5, and the reaction heat is generated by the reaction proceeding from right to left in reaction equation (1). occurs. This heat is transferred to a heat recovery medium through heat transfer tubes or heat transfer plates 2 and is recovered. After the reaction is completed, the valve 7 is closed, and the inflow section 3, the outflow section 4, and the valve 7 are separated from the piping section connected thereto, similarly to the end of the heat storage step.

In the next transportation step, the heat storage tank portion shown in FIG. 1 and, if necessary, the empty container of the B storage section are transported from Y to X. Then, the inflow part 3, the outflow part 4, and the valve 7 are connected to necessary parts, respectively, and the heat storage process is performed again.

The above is a typical heat storage device capable of transporting heat under the above conditions, and the advantages and disadvantages of this case are as follows.

Advantages (a) There is no need to separate heat storage material particles from the heat exchange section. If only the heat storage material particles were to be transported, each cycle of the heat storage/radiation process would require the filling and separation of the particles into the heat exchange section twice, but with this method,
This saves time and requires no equipment.

(b) Also, when moving from the heat storage/dissipation process to the transportation process, it is only necessary to close the valve 7, so the heat storage material does not come into contact with the human body, and the work can be carried out in a state where it is isolated from the outside air. .

Disadvantages (a) Generally, the thermal conductivity of solid particles is low, and if you try to increase the amount of heat transfer per unit time,
The heat transfer area increases and the weight of the heat exchange section increases.
Furthermore, heat storage and heat dissipation reactions are often carried out under increased pressure or reduced pressure, but in this case, the heat storage tank must have a pressure-resistant structure, which increases the weight of the outer shell of the heat storage tank. Therefore, compared to transporting only heat storage material particles, the weight to be transported increases significantly.

(b) When moving from the transportation process to the heat storage/radiation process, it is necessary to connect at least the inflow/outflow part of the heat source or heat medium for heat recovery to the piping part, and the connection of the inflow/outflow part of the reaction gas to the piping part. This connection takes time and effort. Currently, what is called a one-touch type joint is available, but it is actually difficult to obtain one for large diameter piping.

The present invention has been made in consideration of the above-mentioned problems, and an object of the present invention is to provide a heat storage device that can efficiently transport heat.

In order to achieve the above object, the present invention has a heat transfer section connected to a heat medium inlet and an outlet at the bottom, a gas inlet/outlet at the top, and a heat transfer section connected to the heat transfer section at the bottom. A heat storage tank body is provided with a heat storage tank body filled with a heat storage substance, and a transport part detachably connected to the top of the heat storage tank body, and the heat storage tank body is configured to be rotatable around a horizontal axis. In the transportation process, only the transport part containing the heat storage material needs to be transported, which greatly reduces the transport weight, and the only part that needs to be attached and detached is the connection between the main body and the transport part, making it easy. Furthermore, it is convenient because the heat storage material particles can be filled and removed without coming into direct contact with the human body or in a state where they are not in contact with the air for a long period of time.

An embodiment of the present invention will be described below based on the drawings. FIG. 2 is a sectional view thereof, and FIG. 3 is a side view thereof. Reference numeral 11 denotes a heat storage tank main body, to the top of which a transport section 13 is removably connected via a flange section 12 and rotatably supported via a horizontal shaft 14. 15 is a heat transfer part provided at the lower part of the heat storage tank main body 11 and isolated from the internal space of the main body 11;
The heat medium flowing from the heat medium inlet 16 which is configured in a double tube structure and connected to the inner cylinder part communicates with the outer cylinder part at the tip, and the heat medium connected to the outer cylinder part through the outer circumferential path. The medium is configured to flow out from the medium outlet 17. 18 is a gas inlet/outlet provided at the upper part of the heat storage tank main body 11. Further, the inside of the heat storage tank main body 11 is filled with a heat storage material 19 to the extent that the heat transfer portion 15 is filled. 20 is the inlet 16 and the outlet 1
7. A flexible hose connected to the gas inlet/outlet 18 allows rotation of the heat storage tank body 11 while the hose 20 remains connected to the piping section.

In the heat storage process, the heat medium is a flexible hose 2
The heat storage material 19 is heated through the heat transfer section 15 while the heat medium flows in from the heat medium inlet 16 through the heat transfer portion 15 and flows out from the outlet 17 . The heat storage material 19 that has been given heat according to reaction formula (1) generates gas B, which passes through the gas inlet/outlet 18 and is connected to the gas processing section (Fig. (not shown) and stored or disposed of by means such as condensation, liquefaction under pressure, etc. Conversely, in the heating step, gas B is supplied from the gas inlet/outlet 18 and is absorbed by the heat storage material 19, causing a reaction from right to left in reaction formula (1) to generate heat. This heat is transferred to the heat recovery heat medium flowing in from the inlet 16,
It is collected from the outlet 17.

To take out the heat storage material 19, after the heat storage or heat dissipation process is completed, the heat storage tank body 11 is rotated 180 degrees around the horizontal axis 14 and kept stationary in the state shown in FIG. 4.
The heat storage material 19 moves from the heat storage tank body 11 to the transport section 13 . When the transport part 13 has completely moved, a transport truck or the like is guided under the transport part 13, the rear flange part 12 is cut off, and the opening of the transport part 13 is sealed with a top cover 21 prepared separately. It is used as a transportation container and is transported to a place where the next process will be performed, as shown in FIG. Heat transfer part 1 of heat storage material 19
Filling into the container 5 is carried out by the reverse process of taking out.

According to the present invention, the following effects can be obtained.

(b) The process of filling and removing heat storage material particles increases, but the particles can be easily filled from the heat exchange part of the heat storage tank without direct contact with the human body or with air for a long period of time. Or you can take it out.

(b) Since only the heat storage material and the container with the volume required for transportation can be transported, the weight of transportation can be greatly reduced.

(c) The only part that needs to be attached and detached is the connection between the main body and the transport section, which saves time and effort.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an example of a normal heat storage tank, Fig. 2 is a sectional view showing an embodiment of the present invention, Fig. 3 is a side view, and Fig. 4 is for explaining the process of taking out the heat storage material. FIG. 5 is a side view for explaining the transportation process. 11... Heat storage tank body, 12... Flange part, 1
3... Transport section, 14... Horizontal axis, 15... Heat transfer section, 16... Heat medium inlet, 17... Heat medium outlet, 18... Gas inlet/outlet, 19... Heat storage material, 2
1...Top lid.

Claims (1)

[Claims] 1. A heat storage tank main body that has a heat transfer part connected to a heat medium inlet and an outlet at the bottom, has a gas inlet/outlet at the top, and has a bottom filled with a heat storage substance that exchanges heat with the heat transfer part. and a transport section detachably connected to the top of the heat storage tank body, the heat storage tank body being configured to be rotatable around a horizontal axis.