JPS61186792A - Heat storage device - Google Patents

Abstract

PURPOSE:To make it possible to carry out stable coolness dissipating and regenerative operations using a single reaction vessel by discharging vapor generated from the vessel to ambient air at a steady pressure through a coolant vapor discharge pipe. CONSTITUTION:Firstly, upon the coolness dissipating operation, these reaction substances 2 represented by A and B exist. The pressure within the vessel A3 is in a state of a point 2 representing a pressure P2 balanced with an ambient temperature T2. When with the starting of the coolness dissipating operation a switching valve I 12 is opened, the pressure within the vessel A3 is set to be P1 by a steady pressure valve 15. The vapor 13 of a coolant B is discharged to the outside through a coolant vapor discharge pipe 14. In this case, when return water 4 used in space cooling and the lie flows at a heat exchange part 5, A and B of the reaction substances 2 are heated, and a reaction as shown from the right to the left of a reaction formular, A+B A.B+DELTAH, proceeds. Thus,the vapor 13 of the coolant B is generated. Further, in the regenerative operation, the switching valve II 17 of a coolant feed pipe 16 is opened, and a liquefied coolant B flows into a tank A3. Then, a reaction from the left to the right of the above reaction formula occurs. The regenerative operation is continued until the reaction substance A2 in the tank A3 is regenerated to A.B.

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 ('8B), P, 60, in which (1) is a tank filled with a chemically reactive substance (2) (e.g., sodium sulfide; Na, 8). A(3), cooling or heating heat medium (
4) (for example, water) flows through a heat exchanger (5), and (6) is a container A containing a substance (for example, water) to be subjected to a chemical reaction.
7) (for example, water: H, 0) and a heat exchange section BQG through which a cooling or heating heat medium (9) (for example, water) flows. These containers A (1) and B (6) are connected by a pipe (b), and an on-off valve port for stopping the reaction is installed in the middle of this pipe (b). Further, (2) indicates the vapor of the refrigerant. Figure 6 shows the water kept on the gold side (hereinafter H, 0
) and sodium sulfide pentahydrate (hereinafter referred to as Na, S・5H
, indicated by O? , ), in which the vertical axis shows logarithmic pressure (mP) and the horizontal axis shows the reciprocal of temperature (1/T).

Next, the operation will be explained. The reaction between N,,8 and N,0 is expressed by equation (1), and as the reaction progresses from left to right, heat is generated (
Heat amount ΔH).

Na, 8 + 5 ■20 #Na28 ・5H20+
ΔH-・-・-・・Q) Now, an example of releasing cold energy (hereinafter referred to as cooling) and regenerating a reactant will be described. During cooling, the opening/closing valve is open and reactant (2) in container A (1) Na=8. Substance (7) to be subjected to reaction in container B (6) 1. t HtO liquid state, and these states are respectively indicated by points ■ and ■ in FIG. In container B (6), II and 0 in tank B (8) are
It is heated by water (9) (e.g., temperature 12°C) and evaporates at the temperature Tt (e.g., 5°C) at point ■ shown in Fig. 6, becoming Hlo steam @ and causing piping (6) and on-off valve (2). Street container A
It goes to tank A (3) in (1). At this time, the water (9) is cooled and becomes cold water (for example, 7° C.), which is used for air conditioning.

The 1EItO steam (goods) that entered tank A (3) is Nat
Reacts with S, and the temperature T, indicated by point
), 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 cooling water (4). In this way, Na, i9 in container A (1) is changed to Na, S・5
The cooling operation is carried out until the -O liquid in container B (6) is completely exhausted, or until the specified capacity cannot be obtained, and cold water (9) is obtained from container B (6). It will be done.

Next, the operation during regeneration and operation of the reactant will be described. At this time as well, the on-off valve (2) is open, and the tank A (3) in the container A (Q) contains the Na2S that has completed the reaction after the cooling operation.
・5H,0 is tank B (8) NihaH in container B (6)
! There is only 0 steam (to). At this time, container A (1)
In container B (6), cooling water (9) for cooling flows into tank A (3). The NatS·5H1O inside is heated to a temperature T6. pressure PH
The reaction proceeds from right to left in equation (1), H1O vapor is generated, and the reactant (2) is regenerated into Na, 8V.

This steam 0 passes through the on-off valve and piping (b), and then passes through the container B (
6), but since the tank B (8) is cooled by the cooling water (9) flowing through the heat exchange section BQ[), the At the temperature T3, it condenses and liquefies to become a fluid of Hρ. In this way, the container (1)
The regeneration operation is continued until the Na, S -5Hρ in the cypress (3) is regenerated to Na, S, and after this operation is completed, the on-off valve (2) is closed until the cooling operation Cζ is started.

[Problem that the invention seeks to solve]

Since the conventional heat storage device is configured as described above,
It is necessary for the refrigerant vapor to travel back and forth between at least a pair of reaction vessels to perform cooling and regeneration operations, resulting in problems such as a complicated configuration and an increase in the size of the apparatus.

This invention was made to solve the above-mentioned problems, and aims to provide a heat storage device that can perform cooling and regeneration operations using one reaction vessel.

[Means for solving problems]

The heat storage device according to the present invention includes a container for storing a reactant;
A refrigerant vapor discharge pipe provided in the container and having a constant pressure valve and an on-off valve and open to the outside air, a refrigerant supply pipe provided in the container ξζ and having an on-off valve, and a heat exchange section provided in the container ξ. It is something.

[Effect]

The refrigerant vapor release pipe in this invention releases the vapor generated from the container to the outside air at a constant pressure, and the refrigerant supply pipe supplies refrigerant to the container, so one reaction container can stably perform cooling and regeneration operations. I can do it.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, (2) is a reactant (for example, this is referred to as a reactant). α fathom is constant pressure valve (to) and on-off valve IQa
It is a refrigerant vapor release pipe with Q is a refrigerant supply pipe that has an on-off valve l (b) and supplies refrigerant (for example, refrigerant B) to the reaction vessel (1), and is connected to the liquid refrigerant at atmospheric pressure. .

Figure 2 is a temperature-pressure equilibrium diagram of the reaction between reactant A (2) and refrigerant B, where the vertical axis is logarithmic pressure (k + gP),
The horizontal axis indicates the reciprocal of temperature (1/'r). Here, the reaction between reactant A (2) and refrigerant B is expressed by equation (2), and as the reaction progresses from left to right, heat is generated (heat amount Δ■).

A+B4A-B +Δ■ ・・・・・・・・・(2)
Note that Po in FIG. 2 indicates atmospheric pressure.

Next, the operation will be explained. Initially, both the on-off valve I4 and the on-off valve Iaη are closed. Set the pressure setting value of the constant pressure valve (to) to a pressure P higher than atmospheric pressure Po (for example, 1000 Hg
). First, during cooling operation, reactants A and B are present in tank A (3) as reactants (2), and the pressure in tank A (3) is at ambient temperature T as shown in FIG. The state is at point ■ where the pressure P is in equilibrium with . At the start of the cooling operation, the on-off valve I (
When 2) is opened, the pressure in tank A (3) is set to PR by the constant pressure valve (to), so the vapor of refrigerant B (
) is discharged to the outside from the refrigerant vapor discharge pipe Q4. Here, when return water (4) (for example, 12°C) used for air conditioning flows into the heat exchange section A (5), the reactant (2) A-B is heated to the temperature shown in Figure 2. At T1, the reaction in equation (2) proceeds from right to left, and vapor (2) of refrigerant B is generated. Since the reaction is endothermic, the water (4) is cooled to become cold water (for example, 7°C), which is used for air conditioning. The generated vapor (2) of refrigerant B passes through a constant pressure valve (g) and an on-off valve IC1a, which are set so that the pressure inside the tank (3) becomes Pl, and is released to the outside of the container (1). Ru. Therefore, the pressure inside tank A(3) is maintained at P. For cooling operation, heat exchange section A (5)
This continues until the predetermined cooling capacity can no longer be obtained.

Next, we will discuss regeneration operation. Tank A (3) contains refrigerant B and the separated reactant M (2). Also, on-off valve I
Both Qa and the on-off valve 1α are closed. Heat exchange part A
In (5), water or brine (4) (for example, 0°0) cooled by, for example, a refrigerator flows. Reactant A (2
) is cooled by this cooling medium (4), so the tank (
3) is the temperature T3. shown by ■ in Figure 2. Pressure P.

The pressure is lower than the atmospheric pressure Po.

Here, when the on-off valve I of the refrigerant supply pipe Ql is opened, the refrigerant supply pipe is connected to the liquid refrigerant at atmospheric pressure Po, so the liquid refrigerant B flows into the tank A (3). (2)
Reactions occur from left to right in the equation. The reaction is exothermic, but
Inside tank A (3) is a cooling medium (4) such as water or brine.
The reaction proceeds at a temperature T8 and a pressure P since the reactor is cooled at a temperature T8 and a pressure P. Reactant content (2) in tank A (3) is A-B
The regeneration operation continues until the regeneration is completed, and after the operation ends, the on-off valve I (b) is closed until the next operation.

In the above embodiment, the pressure in the tank A (3) was lower than the atmospheric pressure Po during the regeneration operation. The regenerating operation may also be performed by supplying the liquid refrigerant B and maintaining the pressure above atmospheric pressure. Since the temperature in the regeneration operation at this time is as high as temperature T4, there is no need to use underwater brine cooled by a refrigerator or the like as the first cooling water (4).
Cooling water (4) cooled by a cooling tower or the like may be used.

Further, as shown in FIG. 8, a part of the refrigerant vapor discharge pipe Q4 and the refrigerant supply pipe α may be shared.

Moreover, the positions of the on-off valve IQ3 and the constant pressure valve (g) may be reversed.

In the above example, the liquid refrigerant B is supplied into the cypress A during the regeneration operation, but the refrigerant B1 is not limited to liquid and gaseous refrigerant B1 or solid refrigerant B can be supplied. Needless to say, it's fine.

〔Effect of the invention〕

As described above, according to the present invention, there is provided a container for storing a reactant, a refrigerant vapor discharge pipe provided in the container and having a constant pressure valve and an on-off valve, and a refrigerant vapor discharge pipe provided in the container and having an on-off valve and opened to the outside air. Since the refrigerant supply pipe and the heat exchange section provided in the containers are provided, there is an effect that cooling and regeneration operation can be performed using 11 reaction containers.

[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, and FIG.
A characteristic diagram showing a pressure equilibrium state, FIG. 8 is a cross-sectional view of a heat storage device according to another embodiment of the present invention, FIG. 4 is a cross-sectional view of a conventional heat storage device, and FIG. 5 is a cross-sectional view of a heat storage device according to another embodiment of the present invention. ,
8 is a characteristic diagram showing the temperature-pressure equilibrium state of Hlo and Hlo. In the figure, (1) and (6) are containers, (2) is a reactant, and (5). αO is the heat exchange part, (7) is the refrigerant used in the reaction, (6)
is piping, (to) is refrigerant vapor, (2) is refrigerant vapor discharge pipe,
(To) is a constant pressure valve, α・ is a refrigerant supply pipe, (B) and αη are on-off valves. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (2)

[Claims] (1) A container for storing a reactant; a refrigerant vapor discharge pipe provided in the container and having a constant pressure valve and an on-off valve and open to the outside air;
A heat storage device comprising: a refrigerant supply pipe provided in the container and having an on-off valve; and a heat exchange section provided in the container. (2) The heat storage device according to claim 1, wherein the refrigerant vapor discharge pipe and the refrigerant supply pipe share a part.