JPH0518563A - Heat accumulator - Google Patents

Abstract

PURPOSE:To uniform flowing volume of liquid heat medium into and out of each heat accumulating tank in a heat accumulator in which a plurality of heat accumulating tanks are provided for storing the liquid heat medium at a sloping temperature from one end side of the tank to the other end side, a high temperature side passage which works as a feeding passage or return passage of high temperature side liquid heat medium is communicated with a high temperature side end of the respective heat accumulating tanks, and a low temperature side passage which works as a feeding passage or return passage of low temperature side liquid heat medium is communicated with a low temperature side end of the respective heat accumulating tanks. CONSTITUTION:A high temperature side common liquid receiving tank 10 which is communicated with a high temperature side end of respective heat accumulating tanks 1 and stores tank liquid W at a free level and a low temperature side common liquid receiving tank 12 which is communicated with a low temperature side end of the respective heat accumulating tanks 1 and stores the tank liquid W at a free level are provided. A high temperature side passage 2 is connected to the high temperature side common liquid receiving tank 10, while the low temperature side passage 3 is connected to the low temperature side common liquid receiving tank 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is provided with a plurality of heat storage tanks for storing a heat transfer medium in a state where there is a temperature gradient from one end side of the tank to the other end side of the tank, and a heat transfer line for the high temperature side heat transfer fluid or a reflux line. A high temperature side pipe serving as a pipe is connected to the high temperature side end of each heat storage tank, and a low temperature side pipe serving as a low temperature side heat transfer medium delivery line or a reflux pipe is used as a low temperature side of each heat storage tank. The present invention relates to a heat storage tank facility connected to the end.

[0002]

2. Description of the Related Art Conventionally, in a heat storage tank facility as described above, as shown in FIG. 5, each heat storage tank is filled with a high temperature side heat transfer medium liquid (that is, a state where there is no free liquid surface). 1
A state in which the above-mentioned high temperature side pipe 2 which is sent from or is recirculated to each heat storage tank 1 is directly branched and connected to the high temperature side end of each heat storage tank 1 and the low temperature side heat transfer medium is similarly filled in the pipe ( The low temperature side pipe 3 which is sent out from each heat storage tank 1 or recirculates to each heat storage tank 1 in the state where there is no free liquid surface) was also branched and connected directly to the low temperature side end of each heat storage tank 1.

Then, a flow rate adjusting valve 14 and a flow meter 15 are installed in each of the branch line portions of each of the pipe lines 2 and 3,
Therefore, the high temperature side pipeline 2 is used as a delivery pipeline from each heat storage tank 1, and the low temperature side pipeline 3 is used as a reflux pipeline to each heat storage tank 1 so that the heat medium liquid flows in and out of each heat storage tank 1. Form and
On the contrary, the low temperature side pipe 3 is used as a delivery pipe from each heat storage tank 1, and the high temperature side pipe 2 is used as a reflux pipe to each heat storage tank 1 so that the heat medium liquid flows in and out of each heat storage tank 1. Regardless of the form, in each of the pipelines 2 and 3, there is a difference in the pipeline transport pressure loss with respect to each of the heat storage tanks 1.
By adjusting No. 4, the inflow / outflow amount of the heat medium liquid to / from each heat storage tank 1 was made uniform.

[0004]

However, since the plurality of flow rate adjusting valves 14 are individually adjusted, one heat storage tank 1 is used.
When the inflow / outflow amount to
Since the amount of inflow and outflow with respect to the other heat storage tanks 1 is changed due to the influence, the flow rate adjusting operation for making the inflow and outflow amount of the heat medium liquid with respect to each heat storage tank 1 extremely complicated, and the heat medium liquid with respect to each heat storage tank 1 is extremely complicated. There was a problem that it was extremely difficult to make the inflow and outflow amounts uniform with high accuracy.

Since it is difficult to adjust the flow rate as described above, the heat medium liquid inflow / outflow amount to / from each heat storage tank 1 is likely to be nonuniform, which causes nonuniform heat storage / radiation characteristics of each heat storage tank 1. There was a problem that the efficiency of use of the heat storage tank as a whole decreased.

An object of the present invention is to solve the above-mentioned problems by making a rational improvement to the heat medium liquid delivery / refluxing structure for each heat storage tank.

[0007]

A first characteristic configuration of a heat storage tank facility according to the present invention is to provide a plurality of heat storage tanks for storing a heat transfer liquid in a state in which there is a temperature gradient from one end side of the tank to the other end side of the tank. , A high temperature side pipe serving as a high temperature side heat transfer medium delivery line or a reflux line is communicated with the high temperature side end of each heat storage tank, and serves as a low temperature side heat transfer medium delivery line or a reflux line In the configuration in which the low temperature side pipe is communicated with the low temperature side end of each of the heat storage tanks, the high temperature side common liquid receiving tank that communicates with the high temperature side end of each of the heat storage tanks and stores the in-tank liquid in a free liquid level state , And a low temperature side common liquid receiving tank that communicates with the low temperature side end of each of the heat storage tanks and stores the liquid inside the tank in a free liquid level state, and the high temperature side pipeline is the high temperature side common liquid receiving tank And the low temperature side pipe line is connected to the low temperature side common liquid receiving tank.

[0008]

That is, in the above-mentioned first characteristic structure, the high temperature side common liquid receiving tank communicating with the high temperature side end of each heat storage tank is the tank liquid (that is, the heat transfer medium liquid to be sent to the high temperature side pipe, or ,
Since the heat transfer medium flowing in from the high temperature side pipe) is stored in a free liquid surface state, the inflow and outflow pressure of the heat transfer liquid to the high temperature side end of each heat storage tank can be made uniform in this high temperature side common liquid receiving tank. .

Similarly, the low temperature side common liquid receiving tank communicating with the low temperature side end of each heat storage tank is a tank liquid (that is, the heat transfer medium liquid to be sent to the low temperature side pipe, or the low temperature side pipe flows from the low temperature side pipe). The heat medium liquid) is stored in the free liquid surface state, so that in this low temperature side common liquid receiving tank, the inflow / outflow pressure of the heat medium liquid to the low temperature side end of each heat storage tank can be made uniform.

As a result, the high-temperature side pipe is used as a delivery pipe from each heat storage tank, and the low-temperature side pipe is used as a reflux pipe to each heat storage tank so that the heat transfer medium flows in and out of each heat storage tank. Also, conversely, the low temperature side pipe is used as a delivery pipe line from each heat storage tank, and the high temperature side pipe is used as a reflux pipe line to each heat storage tank so that the heat transfer medium flows in and out of each heat storage tank. In any case, the inflow / outflow amount of the heat transfer medium to / from each heat storage tank is made uniform by the above-described inflow / outflow pressure equalizing function of the high temperature side common liquid receiving tank and the low temperature side common liquid receiving tank.

[0011]

Therefore, according to the first characteristic configuration of the present invention, when the flow rate adjusting valve adjusts the inflow / outflow amount to one heat storage tank, the inflow / outflow amount to another heat storage tank changes due to the influence. Below, it is possible to precisely equalize the inflow and outflow amount of the heat medium liquid to and from each heat storage tank without the need for complicated flow rate adjustment operations such as the conventional adjustment of multiple flow rate adjustment valves individually. The flow rate control for the heat storage tanks can be greatly facilitated, and high heat storage tank usage efficiency can be stably ensured in a state where the heat storage and heat dissipation characteristics of each heat storage tank are uniform.

[Second to Fourth Characteristic Configurations of the Present Invention] In a second characteristic configuration of the heat storage tank facility according to the present invention, the high temperature side common liquid receiving tank is provided with an overflow weir to end the high temperature side end of each of the heat storage tanks. To communicate with.

That is, if this second characteristic structure is adopted,
Sending out the high temperature side heat transfer liquid from the high temperature side end of each heat storage tank, or returning the high temperature side heat transfer liquid to the high temperature side end of each heat storage tank,
This can be performed for the upper end of the heat medium liquid storage area at the high temperature side end of each heat storage tank (that is, the highest temperature end of the heat medium liquid temperature gradient in each heat storage tank), whereby the heat storage of each heat storage tank is performed. Can improve efficiency.

A third characteristic configuration of the heat storage tank equipment according to the present invention is that the low temperature side common liquid receiving tank communicates with the low temperature side end of each of the heat storage tanks through a moat weir.

That is, if the third characteristic structure is adopted,
Sending out the low temperature side heat transfer liquid from the low temperature side end of each heat storage tank, or returning the low temperature side heat transfer liquid to the low temperature side end of each heat storage tank,
This can be performed for the lower end of the heat medium liquid storage area at the low temperature side end of each heat storage tank (that is, the lowest temperature end of the heat medium liquid temperature gradient in each heat storage tank). Can improve efficiency.

A fourth characteristic configuration of the heat storage tank facility according to the present invention is a resistor for imparting flow resistance to the liquid flow between the connection portion of the low temperature side pipeline and the mog weir in the low temperature side common liquid receiving tank. Has been established.

That is, when the fourth characteristic configuration is adopted in the implementation of the third characteristic configuration, even if there is a slight difference in the flow resistance of the heat medium liquid in each of the mog weirs with respect to each heat storage tank, the resistor is With the flow resistance imparted by the
It is possible to more accurately achieve uniformization of the inflow / outflow amount of the heat medium liquid with respect to the low temperature side end of each heat storage tank.

[0018]

EXAMPLES Next, examples will be described.

FIG. 1 shows the arrangement of a heat storage tank. A plurality of water tanks 1a, 1b, 1c are arranged in a line, and the water tanks 1a, 1b, 1c are connected in series to form a tank-shaped heat storage tank. 1 is formed, and a plurality of tank-shaped heat storage tanks 1 having the same specifications and formed in the same manner are arranged in parallel.

In each of the heat storage tanks 1 in a row of tanks, cold water or hot water W is stored in a state in which there is a temperature gradient from one end side to the other end side in the tank row direction. To each of the water tanks 1a located at the high temperature side end of the stored water temperature gradient in the row direction, the high temperature side pipeline 2 serving as a delivery pipeline or a reflux pipeline of the high temperature side cold water or the high temperature side hot water W is communicated, In addition, for each of the water tanks 1c located at the low temperature side end of the stored water temperature gradient in the tank row direction in each heat storage tank 1, a low temperature serving as a delivery conduit or a return conduit for the low temperature side cold water or the low temperature side warm water W is provided. The side conduit 3 is in communication.

A concrete tank structure of each heat storage tank 1 is shown in FIG.
As shown in FIG. 5, the high temperature side wall 5 which is located on the high temperature side of the stored water temperature gradient in the tank row direction and which forms the communication passage 4 at the lower end portion
And a low temperature side wall 7 which is located on the low temperature side and which forms the communication passage 6 at the upper end, constitutes a weir structure 8 for partitioning the tank, and this weir structure 8 serves as a partition between the adjacent water tanks 1a, 1b, 1c. , The plurality of water tanks 1a in serial communication with each heat storage tank 1,
1b and 1c are formed.

As a usage pattern for storing the cold water W in each heat storage tank 1, as shown in FIG. 2, when the cold heat is consumed, the cold heat stored in each heat storage tank 1 by the cold water storage is consumed. 1. The stored cold water W is taken out from each of the water tanks 1c located at the low temperature side end of 1, and the taken cold water W is supplied to the cold heat consuming device such as an air conditioner through the low temperature side pipe 3 and the high temperature is supplied from the cold heat consuming device. The cold water W having a high temperature returning through the side pipe 2 is returned to each of the water tanks 1a located at the high temperature side end of each heat storage tank 1, and when cold heat is stored to store cold heat in each heat storage tank 1, As shown in FIG. 3, the stored water W is taken out from each of the water tanks 1a located at the high temperature side end of each heat storage tank 1 in a flow direction opposite to that at the time of cold heat consumption, and the taken water W is supplied to the high temperature side pipeline 2 Is supplied to the refrigerator via It is then returned to a more husband of the cooled cold return water tank 1c positioned cold water W in the cold end of the heat storage tank 1 through the low-temperature-side pipe 3 people.

On the other hand, as a usage pattern for storing the hot water W in each heat storage tank 1, as shown in FIG. 3, at the time of heat consumption in which the heat stored in each heat storage tank 1 by hot water storage is consumed.
The stored hot water W is taken out from each of the water tanks 1a located at the high temperature side end of each heat storage tank 1, and the taken hot water W is supplied to a heat consuming device such as an air conditioner via the high temperature side pipe line 2 while consuming the heat. The warm water W that has been cooled from the device via the low temperature side pipe 3 is returned to each of the water tanks 1c located at the low temperature side end of each heat storage tank 1, and the heat storage heat is stored in each heat storage tank 1. At times, as shown in FIG. 2, the stored water W is taken out from each of the water tanks 1c located at the low temperature side end of each heat storage tank 1 in the flow direction opposite to that at the time of heat consumption, and the taken water W is taken out at the low temperature side. The hot return hot water W heated by the heat source machine is returned to each of the water tanks 1a located at the high temperature side end of each heat storage tank 1 via the high temperature side pipe path 2 while being supplied to the heat source machine via the pipe path 3. I am doing it.

In other words, in both cases of storing cold water and storing hot water, the water tanks 1a, 1b, 1 are formed by the weir structure 8 in the above-described usage pattern.
The cold water or hot water in each of c is kept in a temperature stratified state, and the water temperature at the lower end of the high temperature side water tank and the water temperature at the upper end of the low temperature side water tank are continuous between adjacent water tanks 1a, 1b, 1c. Therefore, in each of the heat storage tanks 1 in the tank row, the stored water temperature gradient from one end side to the other end side in the tank row direction is maintained.

Water tank 1a located at the high temperature side end of each heat storage tank 1
Regarding the communication configuration between each of the above and the high temperature side pipeline 2, the same structure is used for the high temperature end side of each heat storage tank 1 with respect to the group of heat storage tanks arranged in parallel, and for each water tank 1a located at the high temperature side end of each heat storage tank 1. A high temperature side common water tank 10 that communicates through an overflow weir 9 of the specification and stores the tank stored water W in a free water surface state is provided, and the high temperature side pipeline 2 is connected to the high temperature side common water tank 10. On the other hand, regarding the communication configuration between each of the water tanks 1c located on the low temperature end side and the low temperature side pipeline 3, the heat storage tanks are arranged on the low temperature end side of each heat storage tank 1 with respect to the heat storage tank juxtaposed group. A common low temperature side water tank 12 that communicates with each of the water tanks 1c located at the low temperature side end of 1 via a moat weir 11 of the same specification and stores the tank stored water W in a free water surface state, The low temperature side conduit 3 is connected to the low temperature side common water tank 12.

That is, when the cold heat is consumed and the hot heat is stored in the above-mentioned usage pattern, as shown in FIG. 2, the high temperature side cold water or the hot water W returning through the high temperature side pipe 2 is commonly input to the high temperature side. After being made to flow into the water tank 10, it is made to flow from the high temperature side common water input tank 10 through the overflow weir 9 into each of the water tanks 1a located at the high temperature side end of each heat storage tank 1 by overflow, and accordingly, each heat storage tank The low temperature side common cold water tank 12 is caused to flow from the water tanks 1c located at the low temperature side end of 1 into the low temperature side common cold water tank 12 via the above-mentioned mog weir 11 and the low temperature side common cold water tank 12 respectively. To the low temperature side pipe line 3.

Further, in the above-mentioned use mode, during cold heat storage and hot heat consumption, as shown in FIG. 3, cold water or hot water W on the low temperature side that returns via the low temperature side pipe 3 is fed to the low temperature side in common. After being made to flow into the water tank 12, it is made to flow from the common water tank 12 on the low temperature side through the moat weir 11 to each water tank 11c located at the end on the low temperature side of each heat storage tank 1, and accordingly, the end on the high temperature side of each heat storage tank 1 is caused. The stored cold water or the stored hot water W on the high temperature side is introduced into the high temperature side common water tank 10 through the overflow weir 9 from each of the water tanks 1a located in 1), and then from the high temperature side common water tank 10 to the high temperature side pipeline 2. It is designed to be leaked.

In each case, the cold and hot water flows in and out of each heat storage tank 1 at the time of cold heat consumption and hot heat storage, and the flow of cold and hot water at cold heat storage and hot heat storage.
The cold / hot water W is caused to flow into and out of each of the high temperature side end water tanks 1a of each heat storage tank 1 via the high temperature side common water tank 10 that stores the tank stored water W in a free water surface state, and the tank stored water W is also stored. By letting the cold and warm water W flow into and out of the low temperature side end water tanks 1c of the heat storage tanks 1 through the low temperature side common water tank 12 that stores in the free water surface state, the cold and hot water inflow and outflow amounts to the heat storage tanks 1 are made uniform. I am doing it.

As shown in FIG. 4, the overflow weir 9 has its upper edge portion formed in a saw-tooth shape over its entire length, whereby the upper edge of the overflow weir 9 is formed in a straight line over its entire length. In comparison, it is possible to prevent non-uniformity of the overflow water amount distribution due to a manufacturing error, and to more accurately equalize the cold / hot water inflow / outflow amount to / from each high temperature side end water tank 1a of each heat storage tank 1.

On the other hand, in the common water tank 12 for the low temperature side, a porous body as a resistor for imparting flow resistance to the flow of cold / hot water flowing between the connection portion of the low temperature side pipeline 3 and the moat weir 11 for each heat storage tank 1. The plate 13 is stretched so that even if each of the moat weirs 11 has a slight difference in flow resistance due to a manufacturing error or the like, the heat storage tanks 1 are prevented from being affected by the difference in flow resistance. The inflow / outflow amount of cold / hot water with respect to each of the low temperature side end water tanks 1c can be made uniform with high accuracy.

When connecting the high temperature side pipeline 2 and the low temperature side pipeline 3 to the high temperature side common water tank 10 and the low temperature side common water tank 12, each of the pipelines 2 and 3 is branched into a plurality. , The branch pipes are connected to the common water tanks 10 and 12 in a state of being dispersed in the heat storage tank parallel installation direction, whereby the common water tanks 10 and 12 are connected to the storage water surface in the heat storage tank parallel direction. The difference in water level is prevented from occurring, and the inflow / outflow amount of cold / hot water with respect to each of the high temperature side end water tanks 1a and the low temperature end side water tanks 1c of each heat storage tank 1 can be made more uniform.

In the figure, 14 are flow rate adjusting valves.

[Other Embodiments] Next, other embodiments will be listed.

The heat storage tank 1 is a plurality of water tanks 1 as in the above embodiment.
It is not limited to a tank array in which a, 1b and 1c are connected in series, and may be a single water tank.

The communication between the high temperature side end of each heat storage tank 1 and the high temperature side common liquid receiving tank 10 is such that the overflow weir 9
However, the present invention is not limited to this, and various configuration changes can be made, for example, by adopting a configuration in which the fluid is communicated below the surface of the stored liquid.

Further, the low temperature side end of each heat storage tank 1 and the low temperature side common liquid receiving tank 12 are also in communication with each other.
However, the present invention is not limited to this, and various configuration changes can be made, for example, by adopting a configuration in which communication is performed only in the middle layer portion of the stored liquid surface.

In the above-described embodiment, the high temperature side conduit 2 and the low temperature side conduit 3 are respectively used as the consuming side conduit for the consuming device of cold and warm heat and the heat source side conduit for the refrigerator and the heat source. However, separate high temperature side conduits 2 and low temperature side conduits 3 may be provided on the consumption side and the heat source side.

Each of the high temperature side common liquid receiving tank 10 and the low temperature side common liquid receiving tank 12 may be a closed type tank as long as it can store the in-tank liquid W in a free liquid surface state.

The heat transfer liquid W is not limited to cold water or hot water, but may be a liquid other than water.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the structures of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a plan view showing the arrangement of a heat storage tank.

FIG. 2 is a vertical cross-sectional view showing a flow pattern during cold heat consumption and during heat storage.

FIG. 3 is a vertical cross-sectional view showing a flow form during cold heat storage and during heat consumption.

FIG. 4 is a diagram showing the upper edge structure of an overflow weir.

FIG. 5 is a plan view showing a conventional configuration.

[Explanation of symbols]

W heat transfer liquid 1 heat storage tank 2 High temperature side pipeline 3 Low temperature side pipeline 9 overflow weir 10 High temperature side common liquid receiving tank 11 Moguri weir 12 Common low temperature side receiving tank 13 resistor

Claims (4)

[Claims] 1. A high temperature side heat transfer liquid (W) delivery pipe is provided with a plurality of heat storage tanks (1) for storing the heat transfer liquid (W) in a state where there is a temperature gradient from one end side of the tank to the other end side of the tank. A high temperature side pipe (2), which is a passage or a reflux pipe, is connected to the high temperature side end of each heat storage tank (1), and serves as a low temperature side heat transfer medium (W) delivery pipe or a reflux pipe. A heat storage tank facility in which a low temperature side pipe (3) communicates with the low temperature side end of each of the heat storage tanks (1), and communicates with the high temperature side end of each of the heat storage tanks (1), and the in-tank liquid Common liquid receiving tank (10) for storing high temperature side (W) in free liquid state and low temperature side end of each heat storage tank (1), and liquid (W) in tank is free liquid level A common low temperature side liquid receiving tank (12) for storing in a state is provided, and the high temperature side pipeline (2)
Is connected to the high temperature side common liquid receiving tank (10), and the low temperature side pipe line (3) is connected to the low temperature side common liquid receiving tank (12). 2. The heat storage tank facility according to claim 1, wherein the high temperature side common liquid receiving tank (10) communicates with a high temperature side end of each of the heat storage tanks (1) through an overflow weir (9). . 3. The heat storage according to claim 1 or 2, wherein the low temperature side common liquid receiving tank (12) communicates with the low temperature side end of each of the heat storage tanks (1) through a moat weir (11). Tank equipment. 4. A resistor (13) for imparting flow resistance to the liquid flow between the connection part of the low temperature side pipe line (3) and the moat weir (11) in the low temperature side common liquid receiving tank (12). ) Is provided, the heat storage tank facility according to claim 3.