JPS61186791A - Heat storage device - Google Patents

Abstract

PURPOSE:To obtain a heat storage device not requiring a separate reproduction operation or heat source for heating by raising the pressure of vapor generated in one reaction vessel by means of a compressor or a blower and carrying out an inverse reaction in another reaction vessel by the pressure raising. CONSTITUTION:The bath B8 of a reaction vessel B6 is filled with Na2S (converted into Na2S.5H2O after the reaction) which is the same reaction substance as that within the bath A3 of a reaction vessel A1. During a coolness discharging operation I, cooling water 4 flows on the side of the vessel A1. When cool water 9 utilized in space cooling or the like flows on the side of the vessel B6, a reaction as represented by Na2S.5H2O Na3S+5H2O occurs, and cool heat is generated. In the vessel A1, a reaction represented by a reaction formula Na2S+5H2O Na2S.5H2 occurs. These reactions are continued until a predetermined ability cannot be obtained. After completion of the operation, the reaction substance 2 within respectively vessels A1 and B6 assumes a state which is the same as that before the beginning of the coolness dissipating operation I, and it is made possible to again carry out the coolness dissipating operation.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the configuration of a heat storage device that utilizes chemical changes, physical changes, and the like.

[Conventional technology]

Figure 4 shows, for example, [Energy/Resources JVo1.4°N
o4 ('88), P, 60.

In the diagram, (1) is a chemically reacting substance (2).
) (for example, sodium sulfide; Na, 8), or a cooling or heating heat medium (4) (
For example, in a reaction vessel consisting of a heat exchanger (5) through which water) flows, % (6) is a substance (1)% (6) to be subjected to a chemical reaction.
7) (e.g. water; 40) filled tank B (8),
a flow of a cooling or heating heat medium (9) (e.g. water);
This is a reaction vessel B consisting of a heat exchange section B QG.

These reaction vessel person (1) and reaction vessel B (6) are connected to piping path a.
They are connected by υ, and an on-off valve (b) is installed in the middle of this piping to stop the reaction. Figure 5 shows
This is a temperature/pressure equilibrium diagram of water held on the gold side (hereinafter referred to as H,0) and thorium sulfide pentahydrate (hereinafter referred to as Nat8.6IitO), where the vertical axis is the logarithmic pressure (logP
).

The horizontal axis indicates the reciprocal of temperature (1/T).

Next, the operation will be explained. Na, S (!: H,0
The reaction is expressed by equation (1), and as the reaction progresses from left to right, heat is generated (heat amount ΔH).

Nap + sH, 0, =: Nats ・5H, O+
Δ■・・・・・・・・・・・・(1) Now, the cold energy is released (
An example of cooling the reactant (hereinafter referred to as cooling) or regenerating the reactant will be described. During cooling, the on-off valve (2) is open, and the reactant (2) in container A (1) is Na, S, and container B (
The substance (7) to be subjected to the reaction 6) is in a liquid state of Hρ, and each of these states is indicated by a point ■ and a point ■ in FIG. 5, respectively. In container B (6), -O in Hinoki B (8)
is heated by water (9) (for example, at a temperature of 12°C) and the fifth
Evaporates at the temperature Tt (for example, 5°C) at point ■ shown in the figure,
It becomes O vapor and enters the pipe line (2).

It passes through the on-off valve (2) and goes to tank A (3) of the container person (1).

At this time, the water (9) in the heat exchange section BQ(l) is cooled and becomes cold water (for example, 7°C), which is used for air conditioning. Tank A(
The H and O vapors that entered 3) react with Na and S, forming the point ■
At a temperature Tt (for example, 50"C), a reaction from the left to the right in equation (1) occurs and heat is generated.The heat generated at this time is removed by the cooling water (4) flowing through the heat exchange section A (5). In this way, Na in container A (1), 8 is Na.
, 8-5H, O, or until all of the 40 liquid in container B (6) is exhausted, or until the predetermined capacity can no longer be obtained, the cooling operation is carried out, and the cold water ( 9) is obtained.

Next, the operation during regeneration and operation of the reactant will be described. At this time as well, the on-off valve side is open, and the tank A (3) in the container A (1) contains Na, 8, 5
Tow O is H! in tank B (8) in container B (6)! There is only O vapor. At this time, in the container A (1), the heat source water (4) for heating flows into the container A (1), and the cooling water (9) flows into the container B (6). ), NatS・5H,0 in tank A(3) is heated, and the sixth
Temperature T4 shown at point ■ in the figure. The reaction from right to left in equation (1) proceeds at pressure PH, and ■! 0 vapor is generated and the reactant (2) is regenerated to Na, S. This steam passes through the on-off valve (2) and the pipe line αυ, and then flows through tank B (
This tank B (8) flows into the heat exchange section B (1
Since it is cooled by the cooling water (9) flowing through 0, it condenses and liquefies into a liquid of H and O at the temperature Ts shown at point 2 in FIG. In this way, tank A (3) of container person (1)
) The regeneration operation continues until Na, 8, 51 (, 0 is regenerated as Na2S), and after this operation is completed, the on-off valve (2) is closed until the air cooling operation begins. [Problems to be Solved] Since the conventional heat storage device is configured as described above, it is necessary to perform a regeneration operation in addition to the cooling operation, and during this regeneration operation, as shown in Fig. 5, There were problems such as the need for a heat source with a high temperature of T4 as a heat source.

This invention was made to solve the above-mentioned problems, and aims to provide a heat storage device that does not require a separate regeneration operation and therefore does not require a heat source for heating.

[Means for solving problems]

The heat storage device according to the present invention includes two reaction vessels filled with reactants, a heat exchange section provided in each of these reaction vessels, a piping line that is divided into two circuits and connects the reaction vessels, and this piping line. The system is equipped with a compressor or blower installed in the circuit, and an on-off valve that switches the circuit.

[Effect]

The heat storage device according to the present invention has the function of increasing the pressure of vapor generated in one reaction vessel using a compressor or blower, and this external pressure allows the other reaction vessel to easily perform a reverse reaction with that of the one reaction vessel. This allows cooling and regeneration to take place at the same time.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, (1) to (6) and (8) to α swords are the same as the above-mentioned conventional device. In tank B (8) of reaction container B (6), Na, S, which is the same reactant (2) as in 1PfIA (3) of reaction container A (1) (after reaction, Na, S.
It will be 40. ) is filled. In addition, the piping line that connects the containers is divided into two circuits, one circuit has on-off valve IQ3 and compressor 1α41, and the other circuit has on-off valve 2 (I
A compressor I and a compressor 2αQ are installed, and the compression directions of the compressors 1 and 2 (14, αO are opposite to each other).

Next, the operation will be explained. First, at 1 o'clock in the cooling operation,
Cooling water (4) flows into the container A (1) side, and cold water (9) used for cooling, etc. flows into the container B (6) side. Also, on-off valve I
Q3 is closed, on-off valve 2 (2) is open, compressor 1 (14 is off, compressor 2 Q* is on. At this time, the inside of tank B (8) of container B (6) is The state is shown by point ■ in Figure 5, and when return water (9) (for example, 12°C) used for air conditioning flows into the heat exchange part Bao of tank B (8), ) in Na, 8, 5I (, O is temperature T
At t (for example, 6° C.), the reaction proceeds from right to left in equation (1), separating into vapors of Na, S and H2O, and absorbing heat. For this reason, the water (9) is cooled to cold water (e.g. 7°C
) and is used again for cooling purposes. The steam of Hρ released from the container B (6) is sucked into the compressor 2α through the piping (l), and the pressure increases from PL′ to P as shown in FIG.
The pressure is increased to L and passes through the on-off valve 2 (2) to the container A (1). Inside the container (1), the pressure is PL, so Na,
8 is in the state of point ■ in FIG.
℃), the reaction of equation (1) proceeds from left to right. The heat generated at this time is removed by cooling water (4). In this way,
In container B(0), Na, S・5H, 0−+Na, 8 +
5 HtO reaction occurs and cold heat is generated, and
28 A (1) Teha, Na, 8 +5 Hρ-+
Na, 8 .5 HtOLD reactions occur, and these reactions are continued until a predetermined cooling capacity can no longer be obtained.

At the end of this cooling operation I, most of the reactant (2) in container M (1) is Na28.5, and in container B (0), the majority is also Na! It is 8. Therefore, container A (1
) and container B (6) are in a sequential relationship, and when starting the next cooling operation 1, the cold water (4) used for cooling etc. is placed on the container A (1) side, contrary to the previous time. The cooling water (9) flows to the container B (6) side.

On-off valve IQ3 is open, on-off valve 2 (!9 is closed, compressor IQ
4) is on, and compressor 2α is off. At this time, the pressure inside the tank A(3) of the container M(1) is reduced to PL' because the compressor 1α4 sucks the vapors of E[ and O, and the pressure is in the state shown by dot 3 in Figure 5. Return water (4) used for cooling, etc. to the heat exchanger (5) in container A (1)
(For example, 12℃) flows, Na in tank A (3), B
-5Hρ means that the reaction (at temperature Tt (e.g. 5°C)
1) Proceeding from right to left in the equation, it separates into vapors of Na, 8 and H1O, and absorbs heat.

Therefore, the water (4) is cooled to become cold water (for example, 7° C.) and is used again for cooling. The HlO vapor released from the container A (1) passes through the pipe (b) to the compressor 104.
The pressure increases from PL' to PL shown in FIG. 5, and goes through the on-off valve 1 (L3) to the container B (6).

In the oak B (8) of the container B (6), since the pressure is PL, Na- is in the state shown by point (■) in Figure 5. At this time, by flowing the cooling water (9) into the heat exchange part B go, the temperature Tz
(for example, at 50°C), the reaction of formula (1) proceeds from left to right.

The heat generated at this time is removed by cooling water (4). In this way (thus, in container A (1), Na, 8-5Hρ →
The reaction of Na, s + 5 ■20 occurs and cold heat is generated. In container B (6), Na, s + 5 H, O
-) Na2B-5k120 reactions occur, and these reactions are continued until a predetermined cooling capacity is no longer obtained. After this operation is completed, each container A.

The reactant (2) in B (1) and (6) is in the same state as before the start of the cooling operation I, and it is possible to perform the cooling operation again.

In the above embodiment, two compressors are used, but instead, as shown in FIG. 2, one compressor may be used and an on-off valve for switching the flow path may be provided. For example, when steam flows from turtle container person (1) to container B (6) side, open/close valve 8.6 (b)
, 5 is open, on-off valve 4.5 (g), and α on-off are closed, and the steam passes through on-off valve 8 (b) and is compressed in compressor 1 (14), and then passes through on-off valve 6. Go to container B (6).

Also, instead of the on-off valve shown in Fig. 2, the 2 valve shown in Fig.
8-way valves may also be used. For example, when steam flows from container A (1) to container B (6), three-way valves 1 and 2
@, (to) are as shown in the diagram, and steam is supplied through three-way valve 1.
(2) enters the compressor I Q4 and is compressed, and the three-way valve 2
Pass through the fence and go to container B (6).

In the above example, the case was explained in which Na and 8 were used as the reactants* (2), but instead, H and O may be placed in each container and evaporated in one and condensed in the other. , using other reactants such as metal hydrides.

Needless to say, the same effects as in the above embodiment can be obtained even if the above embodiment is used.

Also, a blower may be used instead of the compressor.

〔Effect of the invention〕

As described above, according to the present invention, two reaction vessels filled with reactants, a heat exchange section provided in each of these reaction vessels, a piping line that is divided into two circuits and connects the reaction vessels, Since the compressor or blower provided in this piping path and the on-off valve for switching the circuit are provided, a heat storage device that does not require a separate regeneration operation can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing the structure of a heat storage device according to an embodiment of the present invention, FIGS. 2 and 8 are block diagrams showing main parts of a heat storage device according to other embodiments of the invention, and FIG. FIG. 5 is a cross-sectional view showing the structure of the heat storage device, and FIG. 5 is a characteristic diagram showing the temperature-pressure equilibrium state of the reactant. In the figure, (1) and (6) are reaction vessels, (2) are reactants, (5) and αG are heat exchange parts, (b) are piping, (
2), (G), Qη~(T) are on-off valves, α4. α・ is a compressor, ＠ is a three-way switching valve. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (4)

[Claims] (1) Two reaction vessels filled with reactants, a heat exchange section provided in each of these reaction vessels, a piping line that is divided into two circuits and connects the reaction vessels, and a compression line provided in this piping line. A heat storage device equipped with a blower or a blower, and an on-off valve that switches the above circuit. (2) The heat storage device according to claim 1, wherein a compressor or a blower and an on-off valve are installed in each circuit so that the compression directions thereof are opposite to each other. (3) Two on-off valves are installed in each circuit, and the two on-off valves in each circuit are connected to each other by piping equipped with a compressor or a blower. The heat storage device according to item 1. (4) The heat storage device according to claim 1, characterized in that a three-way switching valve is provided at a branch point of each circuit, and each circuit is connected by a circuit equipped with a compressor.