JP3907539B2 - Latent heat storage system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a latent heat storage system, and more specifically, heat storage that cools or heats a heat transfer liquid in a tank taken out from an end outlet at one end of the tank and returns the liquid into the tank from a return port at the other end of the tank. Latent heat that is provided in the tank of the heat storage tank in a state where a heat storage tank for storing cold or warm heat is provided in the tank, and a large number of heat storage containers containing the latent heat storage material are immersed in the heat medium liquid in the tank. It relates to a heat storage system.
[0002]
[Prior art]
Conventionally, in this type of latent heat storage system, as shown in FIG. 8, in order to take out the heat medium liquid W to be sent to the heat source device 2 in the heat storage operation from the heat storage tank, the extraction is performed at the end of one end of the tank in the heat storage tank 1. We went only from take-out Xs.
[0003]
[Problems to be solved by the invention]
However, in this type of latent heat storage system (see FIG. 8), the heat medium liquid W taken out from the end outlet Xs at one end of the heat storage tank 1 is cooled by the heat source device 2 (refrigerator). In the case of the heat storage operation of the cold heat storage returning from the return port Xr at the other end of the tank to the heat storage tank, the region of the low-temperature heat transfer liquid (hereinafter abbreviated as the cold temperature region) that can efficiently change the phase of the latent heat storage material Z in the tank. However, as the heat storage operation proceeds, it gradually expands from the return port Xr side to the end outlet Xs side in the heat storage tank. In the conventional system, this intermediate temperature is formed by the heat medium liquid that is heated to the intermediate temperature by mixing with the high-temperature heat medium liquid in the tank and the heat medium liquid existing in the tank. The layer gradually grows as the heat storage operation progresses, and becomes a layer that occupies a large area in the tank. .
[0004]
Then, the intermediate temperature layer that progresses toward the end outlet Xs while growing in this way reaches the end outlet Xs early after the start of the heat storage operation, so that it is taken out from the end outlet Xs and is used as a heat source. As shown in FIG. 9, the temperature ts of the heat transfer fluid W sent to the apparatus 2 starts to decrease at a relatively early time after the start of the heat storage operation and gradually decreases. In the system, the heat source device 2 enters a partial load operation state early after the start of the heat storage operation, and the cooling amount per unit time in the heat source device 2 (in other words, the cold heat storage amount per unit time) stores heat. There was a problem that it took a long time for heat storage because it was limited to a small one from the early stage after the start of operation.
[0005]
Further, since the intermediate temperature layer in which the temperature of the heat transfer medium Z is high and the phase change of the latent heat storage material Z in the layer is difficult to proceed occupies a large area and is formed in the heat storage tank, in the conventional system, it is sent to the heat source device 2 When the temperature ts of the heat transfer fluid W decreases to the lower limit inlet temperature te of the heat source device 2 and the heat storage operation is terminated by stopping the heat source device 2, the phase change is still completed in the intermediate temperature layer. There is also a problem that a large amount of the latent heat storage material Z that remains is likely to remain, which limits the amount of heat storage.
[0006]
In addition, in the conventional system, the heat transfer operation of the thermal heat storage operation in which the heat transfer liquid in the heat storage tank taken out from the end outlet at one end of the tank is heated by the heat source device and returned from the return port at the other end of the tank to the heat storage tank. Even in the case, for the same reason as described above, there is a problem that it takes a long time to store heat and the amount of stored heat is limited to a small amount.
[0007]
In view of this situation, the main problem of the present invention is to effectively solve the above problem by adopting a rational heat storage form.
[0008]
[Means for Solving the Problems]
[1] The invention according to claim 1 relates to a latent heat storage system, the feature of which is
The heat transfer liquid in the tank taken out from the end outlet at one end of the tank is cooled or heated by a heat source device, and the cold energy or the heat is stored in the tank by a heat storage operation for returning to the tank from the return port at the other end of the tank. A heat storage tank,
In the configuration in which a large number of heat storage containers containing the latent heat storage material are installed in the tank of the heat storage tank in a state of being immersed in the heat medium liquid in the tank,
In the flow direction of the heat transfer liquid in the tank during the heat storage operation, the upstream side of the end outlet and the downstream side of the installation area of the heat storage container, or the intermediate position in the installation area of the heat storage container, In the heat storage operation, an intermediate outlet is provided to take out the heat medium liquid to be combined with the heat medium liquid taken out from the end outlet and sent to the heat source device from the heat storage tank,
In the heat storage operation of the cold heat storage that cools the heat medium liquid by the heat source device, when the temperature of the heat medium liquid taken out from the intermediate outlet decreases to a set stop temperature lower than the phase change temperature of the latent heat storage material,
Or, in the heat storage operation of thermal heat storage in which the heat medium liquid is heated by the heat source device, the temperature of the heat medium liquid taken out from the intermediate outlet has increased to a set stop temperature higher than the phase change temperature of the latent heat storage material When
There is a control means for stopping the extraction of the heat transfer medium liquid from the intermediate outlet.
[0009]
That is, according to this structure, in the case of the heat storage operation of the cold heat storage in which the heat transfer medium liquid taken out from the heat storage tank is cooled by the heat source device and returned to the heat storage tank (see FIGS. 1 and 3), from the intermediate outlet Xm In the heat storage tank 1 through the intermediate outlet Xm until the temperature tm of the extracted heat transfer fluid drops to the set stop temperature tb lower than the phase change temperature tk of the latent heat storage material Z (latent heat storage material for cold heat storage). Therefore, the intermediate temperature heat medium liquid forming the intermediate temperature layer (that is, the heat medium liquid higher than the set stop temperature tb) is on the end outlet Xs side. When the intermediate temperature layer passes through the position where the intermediate outlet Xm is disposed in the progress of the intermediate temperature layer, a part of the intermediate temperature layer is taken out of the tank from the intermediate outlet Xm. Progress toward the end outlet Xs is effectively suppressed.
[0010]
And in the flow direction of the heat transfer fluid W in the tank during the heat storage operation, a low temperature region (that is, more than the set stop temperature tb described above) that gradually extends from the return port Xr side to the end outlet Xs side following the intermediate temperature layer. When the low temperature heat medium liquid region) reaches the arrangement position of the intermediate outlet Xm and reaches the arrangement position of the intermediate outlet Xm from the return port Xr, it is taken out from the intermediate outlet Xm. When the temperature tm of the heat transfer liquid decreases to the set stop temperature tb, the take-out of the heat transfer liquid W in the tank from the intermediate take-out port Xm is stopped. In the state where the progress toward the exit Xs is effectively suppressed as described above, the expansion of the low temperature region toward the end portion outlet Xs is continued.
[0011]
That is, as described above, the growth of the intermediate temperature layer and the progression toward the end portion outlet Xs can be suppressed, so that the temperature ts of the heat transfer medium liquid taken out from the end portion outlet Xs as shown in FIG. As shown in FIG. 3, the temperature ts of the heat transfer fluid W taken out from the end outlet Xs can be maintained at a high temperature for a long time after the start of the heat storage operation. As described above, the temperature ts of the heat transfer medium liquid W taken out from the end outlet Xs can be maintained at a high temperature for a long time. The intermediate medium outlet Xm can be obtained by joining the heating medium liquid W having a set stop temperature tb or higher extracted from the outlet Xm and the high-temperature thermal medium liquid W extracted from the end outlet Xs to the heat source device 2 and sending them to the heat source device 2. Heat medium liquid W from the tank Under the situation where the removal is stopped, the heat transfer fluid sent to the heat source device 2 is sent to the heat source device 2 by sending only the heat transfer fluid W taken out from the end outlet Xs maintained at a high temperature for a long time as described above. The temperature ti of W (the inlet temperature of the heat source device) can also be stably maintained at a temperature above a certain level for a long time after the start of the heat storage operation, and the partial load operation is performed at an early time after the heat source device 2 starts the heat storage operation. Thus, the time required for heat storage can be effectively shortened as compared with the above-described conventional system.
[0012]
In addition, until the temperature ti of the heat medium liquid W sent to the heat source device 2 decreases to the lower limit inlet temperature te of the heat source device 2, the intermediate temperature layer is effectively prevented from growing as described above and the intermediate port is taken from the return port Xr. Since it is possible to keep the low temperature region until it reaches the position where the outlet Xm is disposed (in short, the low temperature region can be expanded by the amount of growth inhibition of the intermediate temperature layer), the intermediate intake can be made from the return port Xr. With respect to the latent heat storage material Z up to the position where the outlet Xm is disposed, the phase change is efficiently advanced by the low-temperature heat transfer liquid, and the phase change is completed almost completely, thereby completing the heat storage operation. In this respect, the amount of heat storage is also effective compared to conventional systems that end the heat storage operation in a situation where there are many latent heat storage materials that have not yet completed phase change in the middle temperature layer that occupies a large area. Can be increased.
[0013]
On the other hand, in the case of the heat storage operation of the thermal storage that heats the heat transfer medium taken out from the heat storage tank and returns it to the heat storage tank by the heat source device (see FIG. 6), the above configuration is the same as in the case of the heat storage operation of the cold storage According to the above, the temperature tm of the heat transfer medium liquid W taken out from the intermediate outlet Xm rises to a set stop temperature tb ′ that is higher than the phase change temperature tk ′ of the latent heat storage material Z ′ (latent heat storage material for thermal storage). Until then, the heat transfer fluid W in the heat storage tank is taken out through the intermediate outlet Xm, so that the intermediate temperature heat transfer medium forming the intermediate temperature layer (that is, the heat transfer medium having a temperature lower than the set stop temperature tb ′ described above) When the intermediate temperature layer passes through the position where the intermediate outlet Xm is disposed in the progress of the intermediate temperature layer toward the end outlet Xs, part of the liquid is taken out of the tank from the intermediate outlet Xm. Thereby, the growth of the intermediate temperature layer and the end outlet X Progression to the side of the can be effectively suppressed.
[0014]
Then, in the flow direction of the heat transfer fluid W in the tank during the heat storage operation, a high temperature region (that is, the set stop temperature tb ′ described above) that gradually extends from the return port Xr side to the end outlet Xs side following the intermediate temperature layer. If the high temperature heat medium liquid region) reaches the position where the intermediate outlet Xm is disposed, and reaches the position where the intermediate outlet Xm is disposed from the return port Xr, the temperature from the intermediate outlet Xm When the temperature tm of the extracted heat transfer fluid W rises to the set stop temperature tb ′, the removal of the in-vessel heat transfer fluid W from the intermediate take-out port Xm is stopped. In the state where the progress toward the end portion outlet Xs is effectively suppressed as described above, the expansion of the high temperature region toward the end portion outlet Xs is continued.
[0015]
That is, by suppressing the growth of the intermediate temperature layer and the progress toward the end outlet Xs as described above, it is possible to prevent the temperature ts of the heat transfer medium W taken out from the end outlet Xs from rising early. Thus, the temperature ts of the heat transfer medium liquid W taken out from the end outlet Xs can be maintained at a low temperature for a long time after the start of the heat storage operation, and the heat medium taken out from the end outlet Xs in this way. Since the temperature ts of the liquid W can be maintained at a low temperature for a long time, the temperature of the heat transfer liquid W in the tank is taken out from the intermediate outlet Xm, and under the set stop temperature tb ′ taken out from the intermediate outlet Xm. The heat medium liquid W and the low temperature heat medium liquid W taken out from the end outlet Xs are merged and sent to the heat source device 2, and the tank heat medium liquid W can be taken out from the intermediate outlet Xm. In a stopped situation As described above, only the heat transfer medium liquid W taken out from the end outlet Xs maintained at a low temperature for a long time is sent to the heat source apparatus 2, so that the temperature ti of the heat transfer medium W sent to the heat source apparatus 2 (inlet of the heat source apparatus) Temperature) can also be stably maintained at a temperature below a certain level for a long time after the start of the heat storage operation, and it is effective that the heat source device 2 enters a partial load operation state at an early stage after the start of the heat storage operation. As a result, the time required for heat storage can be effectively shortened in the case of the heat storage operation of the thermal storage as compared with the above-described conventional system as in the case of the heat storage operation of the cold storage.
[0016]
In addition, the growth of the intermediate temperature layer is effectively suppressed as described above until the temperature ti of the heat medium liquid W sent to the heat source device 2 rises to the upper limit inlet temperature te ′ of the heat source device 2, and the intermediate from the return port Xr. Since it is possible to keep a high temperature region until it reaches the position where the take-out port Xm is arranged (in short, the high temperature region can be enlarged by an amount corresponding to the growth inhibition of the intermediate temperature layer), the intermediate from the return port Xr With regard to the latent heat storage material Z ′ that reaches the position where the take-out port Xm is arranged, the phase change is efficiently advanced by the high-temperature heat transfer liquid to complete the phase change almost completely, and then the heat storage operation is completed. In this respect, as in the case of the heat storage operation of the cold storage, the latent heat storage material in which the phase change is not yet completed in the intermediate temperature layer that occupies a large area in the case of the heat storage operation of the heat storage. The heat storage operation ended in a situation where there were many remaining Compared to it would conventional systems, it is possible to increase the heat storage capacity efficiently.
[0017]
In the implementation of the invention according to claim 1, in the case of the heat storage operation of the cold energy storage, the extraction of the in-tank heat transfer medium W from the intermediate outlet Xm is performed from the beginning of the heat storage operation, and the extracted heat medium When the temperature tm of the liquid W decreases to the set stop temperature tb, the mode in which the extraction of the heat transfer medium W from the intermediate outlet Xm is stopped, or the heat in the tank at the location where the intermediate outlet Xm is disposed When the temperature tm of the liquid medium W decreases to the set start temperature ta after the start of the heat storage operation, the extraction of the heat transfer medium W in the tank from the intermediate outlet Xm is started, When the temperature tm further decreases to the set stop temperature tb, any of the forms in which the extraction of the in-tank heat transfer fluid W from the intermediate outlet Xm is stopped may be employed.
[0018]
Similarly, also in the case of the heat storage operation of thermal storage, the extraction of the heat transfer medium W from the intermediate outlet Xm is performed from the beginning of the heat storage operation, and the temperature tm of the extracted heat transfer medium W is stopped. When the temperature tb ′ rises, the form in which the removal of the heat transfer medium W from the intermediate outlet Xm is stopped, or the temperature tm of the heat transfer liquid W in the tank at the location where the intermediate discharge Xm is provided is After the start of the heat storage operation, when the temperature rises to the set start temperature ta ′, the take-out of the heat transfer fluid W in the tank from the intermediate outlet Xm is started, and the temperature tm of the take-off heat transfer fluid W further stops setting. Any of the forms in which the removal of the heat transfer liquid W in the tank from the intermediate outlet Xm is stopped when the temperature rises to the temperature tb ′ may be adopted.
[0019]
In addition, the start / stop of taking out the heat medium liquid W in the tank from the intermediate outlet Xm is not limited to the form in which the control means is executed based on the detection of the heat medium liquid temperature, but based on the elapsed time from the start of the heat storage operation. Alternatively, the control unit may execute the control in a timer-controlled manner.
[0020]
In carrying out the invention according to claim 1, the intermediate outlet Xm is disposed only at one place in the flow direction of the heat transfer fluid W in the tank during the heat storage operation, or the plurality of intermediate outlets Xm are stored in the heat storage operation. In such a mode that the heating medium liquid W in the tank is dispersed in the flow direction at the time, and the above-described stopping of the extraction according to the temperature of the heating medium liquid W is individually performed for each of the plurality of intermediate outlets Xm. Either may be adopted.
[0021]
Furthermore, the intermediate outlet Xm is disposed at a location upstream of the end outlet Xs and downstream of the installation area of the heat storage container 9 in the flow direction of the heat transfer liquid W in the tank during the heat storage operation. Alternatively, the intermediate outlet Xm is provided at an intermediate position in the installation area of the heat storage container 9 in the flow direction of the heat transfer liquid W in the tank during the heat storage operation (including the downstream end position in the heat transfer medium flow direction in the heat storage container installation area). Arrangement form, or alternatively, the intermediate outlet Xm is located upstream of the end outlet Xs and downstream of the installation area of the heat storage container 9 in the flow direction of the heat transfer liquid W in the tank during the heat storage operation. Any of the forms arranged at both the intermediate location in the installation area of the heat storage container 9 may be adopted.
[0022]
[2] The invention according to claim 2 specifies a preferred embodiment for carrying out the invention according to claim 1, and its features are as follows:
Dispersing the plurality of intermediate outlets in the flow direction of the heat transfer fluid in the tank at the time of the heat storage operation, and arranging in the installation area of the heat storage container,
The control means is configured to individually execute the above-described stop of taking out according to the temperature of the taking-out heat medium liquid for each of the plurality of intermediate outlets.
[0023]
That is, according to this configuration, in the case of the heat storage operation of the cold heat storage (see FIGS. 4 and 5), first, the intermediate outlet located first from the return port Xr side in the flow direction of the heat transfer liquid W in the tank. The region between the return port Xr and the first intermediate outlet Xm is made a low temperature region while suppressing the growth of the intermediate temperature layer by taking out the heat medium liquid W in the vessel from Xm, and subsequently the heat medium in the vessel While suppressing the growth of the intermediate temperature layer by taking out the heat transfer medium W in the tank from the intermediate outlet Xm located second from the return port Xr side in the flow direction of the liquid W, the first intermediate outlet Xm In the form in which the region between the second intermediate outlet Xm is made a low temperature region, the low temperature region is changed to the end outlet Xs with substantial growth inhibition of the intermediate temperature layer from an early stage after the start of the heat storage operation. Will expand to the side of the It is possible to prevent the region from being formed in the tank temporarily or not, and thereby, an expanded region of a good low temperature region capable of efficiently changing the phase of the latent heat storage material Z can be more reliably and efficiently performed. It can be formed in a tank.
[0024]
Similarly, in the case of heat storage operation of thermal heat storage, the latent heat storage material can be efficiently phase-changed in a state where a large growth region of the intermediate temperature layer is prevented from being temporarily formed in the tank. An expanded region of a good high temperature region can be formed more reliably and efficiently in the tank, and by these, heat storage is required in both cases of heat storage operation of cold heat storage and heat storage operation of heat storage Time can be shortened more reliably and effectively, and the amount of heat storage can be increased more reliably and effectively.
[0025]
[3] The invention according to claim 3 specifies a preferred embodiment for carrying out the invention according to claim 1 or 2, and its features are as follows:
When the control means causes the heat medium liquid taken out from the end outlet and the heat medium liquid taken out from the intermediate outlet to join and send to the heat source device, the heat medium liquid is taken out from the end outlet. The ratio of the flow rate and the heat medium liquid extraction flow rate from the intermediate outlet is adjusted to adjust the temperature of the combined heat medium liquid to be sent to the heat source device to the set feed temperature.
[0026]
In other words, according to this configuration (see FIGS. 1 to 4), regardless of the temperature change of the heat transfer fluid W taken out from the end outlet Xs and the temperature change of the heat transfer fluid W taken out from the intermediate outlet Xm, Since the temperature ti (the inlet temperature of the heat source device) of the combined heat transfer medium W sent to the heat source device 2 can be stably maintained at the set feed temperature ti, if an appropriate temperature is set as the set feed temperature ti, a predetermined temperature is set. In the heat storage operation in which the combined heat medium liquid W having a flow rate is sent to the heat source apparatus 2 and the heat medium liquid W having the set return temperature trr is returned from the heat source apparatus 2 to the heat storage tank 1, the heat medium liquid taken out from the end outlet Xs. Regardless of the temperature change of W or the temperature change of the heat transfer fluid W taken out from the intermediate outlet Xm, the heat source device 2 can be continuously operated while maintaining the maximum output state or an output state close thereto. Of heat storage operation In both cases of thermal storage and thermal storage, the thermal storage operation can be carried out in a state in which the amount of heat storage per unit time is more stably secured and the time required for the thermal storage can be shortened more effectively. be able to.
[0027]
DETAILED DESCRIPTION OF THE INVENTION
[0028]
[First Embodiment]
FIG. 1 shows a latent heat storage system for cold heat, 1 is a heat storage tank, 2 is a refrigerator as a heat source device, 3 is a load device (for example, an air conditioner or a fan coil unit), and in this system, the heat source is used in the heat storage operation. By circulating the heat medium liquid W (for example, water) between the heat storage tank 1 and the refrigerator 2 through the side circulation path 4, the generated cold heat of the refrigerator 1 is stored in the heat storage tank 1, and on the other hand, a load is applied in the heat radiation operation. By circulating the heat medium liquid W between the heat storage tank 1 and the load device 3 through the side circulation path 5, the cold energy stored in the heat storage tank 1 in the previous heat storage operation is consumed by the load device 3.
[0029]
P1 is a heat source side circulation pump that circulates the heat medium liquid W between the heat storage tank 1 and the refrigerator 2 in the heat storage operation, and P2 circulates the heat medium liquid W between the heat storage tank 1 and the load device 3 in the heat radiation operation. This is a load-side circulation pump.
[0030]
The heat storage tank 1 is a connected heat storage tank in which a plurality of liquid tanks 1a to 1e are connected in series. In the heat storage operation, as shown by solid line arrows in the figure, one end in the column direction in the series connection row of the liquid tanks 1a to 1e. The heat medium liquid W in the tank is taken out from the liquid tank 1a (that is, one end part of the heat storage tank 1) through the end outlet Xs for the heat storage operation, and the extracted heat medium liquid W is cooled by the refrigerator 2 to store heat. By returning from the return port Xr for operation to the liquid tank 1e at the other end in the row in the series connection row (that is, the other end of the heat storage tank 1), the liquid tank 1a for taking out and returning at both ends in the row direction In the liquid tanks 1b to 1d except 1e, the other end in the column direction of the series connection row is allowed to flow in the tank upward in a stable state over almost the entire area of the liquid tank. Cold water is stored in the tank sequentially from the liquid tank located on the (low temperature end) side.
[0031]
On the contrary, in the heat dissipation operation, as indicated by the broken arrows in the figure, the heat in the tank passes from the liquid tank 1e at the other end in the row in the series connection row of the liquid tanks 1a to 1e through the end outlet Ys for heat dissipation operation. The medium liquid W is taken out and the taken out heat medium liquid W is cooled and dissipated by the load device 3 and then returned from the return port Yr for heat radiation operation to the liquid tank 1a at one end in the row direction in the series connection row. In each of the liquid tanks 1b to 1d excluding the liquid tanks 1a and 1e for taking out and returning at both ends, the heat transfer medium W in the liquid tank flows downward in a stable state over almost the entire area of the liquid tank. As described above, the temperature increase of the heat medium liquid W in the tank by the return heat medium liquid W from the load device 3 is sequentially advanced from the liquid tank located on the column direction one end (high temperature end) side of the series connection row. In the form, the cold energy stored in the heat storage tank 1 in the previous heat storage operation is consumed. Go.
[0032]
And in this 1st Embodiment, as said connection type heat storage tank 1, specifically, the weir 6 which is located in the said row direction other end side and forms the horizontal upper water channel 6a in an upper end part, and the said row | line | column The vertical weir 8 is formed between the weirs 6 and 7 by the reverse weir 7 which is located on the one end side in the direction and forms the lower water channel 7a which is horizontally oriented at the lower end, and the adjacent liquid tanks 1a to 1d are connected to each other. A heat storage tank of a mogul weir system (or improved mogul weir system) having a structure in which it is communicated through a series of communicating water channels composed of a horizontal upper water channel 6a, a vertical water channel 8 and a horizontal lower water channel 7a is adopted.
[0033]
In addition, this heat storage tank 1 is a modification of an existing heat storage tank used as a water heat storage tank to a heat storage tank for latent heat storage at the time of system update, and as a modification, among the liquid tanks 1a to 1e, In the tanks of the second and third liquid tanks 1d and 1c from the other end (low temperature end) in the series connection row of the liquid tanks, a large number of heat storage containers for latent heat storage as shown in FIGS. 9 is installed.
[0034]
The heat storage container 9 is in the shape of a vinyl bag, and the temperature of the low-temperature heat transfer medium W required by the load device 3 or the temperature in the vicinity thereof (for example, 5.5 to 7 ° C.) is contained in the container. By storing the latent heat storage material Z for cold heat storage with the phase change temperature tk between the phases, and by remodeling the system to install the heat storage container 9 in the tanks of the liquid tanks 1c and 1d The latent heat storage is enabled to increase the heat storage capacity of the heat storage tank as much as necessary.
[0035]
In installing the heat storage container 9 in the tanks of the liquid tanks 1c and 1d in the system update, as shown in FIGS. 1 and 2, first, the frame 10 is installed on the tank bottom of the liquid tanks 1c and 1d. A gap S is formed between the container and the top surface portion 10a of the gantry, and then a cage-like storage container 11 in which a large number of heat storage containers 9 are previously stored outside the tank is sequentially carried into the liquid tanks 1c and 1d and stored therein. A large number of heat storage containers 9 are installed in the tanks of the liquid tanks 1c and 1d by placing the container 11 on the porous upper surface portion 10a of the mount 10 in a stacked state. In order to pass the in-tank heating medium liquid W through the stacking area of the storage container 11 on 10, the clearance S between the tank bottom and the gantry upper surface portion 10 a is set to the heating medium liquid W in the stacking area of the storage container 11. In the liquid delivery chamber for sending out upward, the storage capacity on the gantry 10 11 so that the heat transfer liquid W in the tank can be stably passed upward in a uniform state as much as possible with respect to the stacking area of 11 (that is, the installation area of a large number of heat storage containers 9). In a state where S is a liquid collecting chamber for collecting the heat transfer fluid W downward from the stacking area of the storage container 11, the heat transfer medium W in the tank is as uniform as possible with respect to the stacking area of the storage container 11 on the gantry 10. So that it can pass stably downward.
[0036]
When the system is updated, in addition to the installation of the heat storage container 9 in the tank, the upper part in the tank of the third liquid tank 1c from the other end in the row direction (low temperature end) in the series connection row of liquid tanks, that is, in the heat storage operation An intermediate outlet Xm is provided in the vicinity of the downstream end of the heat storage container installation region across the two liquid tanks 1d and 1c in the flow direction of the in-tank heat transfer liquid W, and the in-tank heat transfer liquid W taken out from the intermediate intake Xm Are combined with the heat transfer fluid W taken out from the end outlet Xs for heat storage operation and sent to the refrigerator 2 and a joining flow path 4a and a joining three-way valve V are provided.
[0037]
12a is a take-out temperature sensor for detecting the temperature tm of the heat transfer fluid W in the tank at the position where the intermediate take-out port Xm is arranged (in other words, the temperature of the heat transfer solution W taken out from the intermediate take-out port Xm), and 12b is a refrigerator. 2 is a feed temperature sensor for detecting the temperature ti (the inlet temperature of the refrigerator) of the combined heat transfer fluid W fed to 2, and 13 is a controller for controlling the operation of the system. This controller 13 is used for each temperature sensor 12a in the heat storage operation. , 12b, the following controls (a) to (c) are executed based on the detected temperatures tm, ti.
[0038]
(B) When a heat storage operation start command is given, the heat transfer liquid in the tank is stopped only from the end outlet Xs for the heat storage operation by stopping the extraction of the heat transfer liquid from the intermediate outlet Xm of the merged three-way valve V. In this state, the heat source side circulation pump P1 and the refrigerator 2 are activated to start the heat storage operation.
[0039]
Note that the heat medium liquid W at a constant flow rate is supplied to the refrigerator 2 through the constant output operation of the circulation pump P1 throughout the heat storage operation.
[0040]
(B) After the start of the heat storage operation, when the detected temperature tm detected by the take-out temperature sensor 12a decreases to the set start temperature ta (see FIG. 3), the merging three-way valve V is moved from both the end take-out port Xs and the intermediate take-out port Xm. The merging three-way valve is configured to take out the heat medium liquid W in the tank and keep the temperature ti of the merging heat medium liquid W sent to the refrigerator 2 at the set feed temperature tii based on the temperature ti detected by the feed temperature sensor 12b. The ratio of the heating medium liquid extraction flow rate from the end portion outlet Xs and the heating medium liquid extraction flow rate from the intermediate extraction port Xm is adjusted by the operation of V.
[0041]
In the first embodiment, the setting start temperature ta is set to a temperature (for example, 7 ° C.) near the upper limit value of the variation range of the phase change temperature tk of the latent heat storage material Z, and the set feed temperature tii. Is refrigerated in the heat storage operation in which the heat medium liquid W at a constant flow rate is supplied to the refrigerator 2 and the low temperature heat medium liquid W at the set return temperature trr (for example, 5 ° C.) is returned from the refrigerator 2 to the heat storage tank 1. The heat medium liquid temperature (for example, 10 ° C.) at which the machine 2 can be operated at the maximum output state is set.
[0042]
(C) Thereafter, when the detection temperature tm detected by the extraction temperature sensor 12a is lowered to the set stop temperature tb (for example, 5.3 ° C.) lower than the phase change temperature tk of the latent heat storage material Z, the intermediate three-way valve V is again removed The extraction of the heat transfer fluid from the outlet Xm is stopped and the tank heat transfer fluid W is taken out only from the end outlet Xs for heat storage operation, and then the temperature ti (intermediate outlet Xm) detected by the feed temperature sensor 12b. In the situation where the extraction of the heat transfer liquid from the stop is stopped, it is equal to the temperature ts of the transfer heat transfer liquid W taken from the end outlet Xs) to the lower limit inlet temperature te (for example, 5.7 ° C.) of the refrigerator 2, The refrigerator 2 and the heat source side circulation pump P1 are stopped to end the heat storage operation.
[0043]
That is, the heat storage tank through the intermediate outlet Xm until the temperature tm of the heat transfer fluid W taken out from the intermediate outlet Xm is lowered to the set stop temperature tb lower than the phase change temperature tk of the latent heat storage material Z in this way. By taking out the heat transfer fluid W in 1, a low-temperature region (latent heat storage material Z can be efficiently phase-changed from the return port Xr side to the end outlet Xs side as the heat storage operation proceeds. When the intermediate temperature layer formed on the tip side of the low-temperature heat transfer fluid region) passes through the position where the intermediate outlet Xm is disposed, a part of the intermediate temperature heat transfer fluid forming the intermediate temperature layer is intermediated It takes out from the outlet Xm to the outside of the tank, thereby making the time required for heat storage longer, and the growth of the intermediate temperature layer causing the reduction of the heat storage amount and the progress toward the end outlet Xs. I try to suppress it.
[0044]
[Second Embodiment]
FIG. 4 also shows a latent heat storage system for cold heat. In this latent heat storage system, the heat transfer fluid W flows in the tank as indicated by the solid line arrow in the heat storage operation, and the broken line in the figure indicates the heat release operation. In the connected heat storage tank 1 of the mogul weir system (or improved mogul weir system) that causes the heat transfer medium W to flow in the tank as indicated by the arrow, among the serially connected liquid tanks 1a to 1f, in the series connection row of these liquid tanks A large number of heat storage containers 9 containing the latent heat storage material Z for cold heat storage are stacked in each of the four liquid tanks 1b to 1e except for the extraction and return liquid tanks 1a and 1f at both ends in the row direction. It is installed in.
[0045]
In addition, the third, fourth, and fifth liquid tanks 1d to 1b from the return port Xr side (low temperature end side) for heat storage operation, the lower part in each tank, that is, the heat storage of each of the three liquid tanks 1d to 1b. An intermediate outlet Xm is provided at the heat medium liquid inflow portion during operation, and the three intermediate outlets Xm are disposed in the tank during the heat storage operation with respect to the installation area of the heat storage container 9 over the four liquid tanks 1b to 1e. Dispersed in the direction of flow of W and installed in the region, and the flow rate for intermittently removing the heat transfer fluid W in the tank from each of the end outlet Xs and the three intermediate outlets Xm and adjusting the extraction flow rate A regulating valve MV is provided for each outlet Xs, Xm.
[0046]
12a is an extraction temperature for detecting the temperature tm1 to tm3 (in other words, the temperature of the heat transfer medium liquid W taken out from each intermediate output port Xm) of the in-tank heat transfer liquid W at the position where each of the three intermediate output ports Xm is disposed. The sensor 12b joins the heat transfer medium W taken out from the end outlet Xs and the heat transfer medium W taken out from each intermediate outlet Xm guided by the combined flow path 4a and sends the combined heat to the refrigerator 2. A feed temperature sensor that detects the temperature ti (the inlet temperature of the refrigerator) of the liquid medium W, 13 is a controller that controls the operation of the system, and this controller 13 includes three extraction temperature sensors 12a and a feed temperature in the heat storage operation. The following controls (A) to (C) are executed based on the detected temperatures tm1 to tm3 and ti by the sensor 12b.
[0047]
(B) When a heat storage operation start command is given, the flow rate adjusting valve MV for each of the outlets Xs, Xm is stopped, and the heat medium liquid take-out from all the intermediate outlets Xm is stopped, and the end outlets for the heat storage operation The heat transfer liquid W in the tank is taken out only from Xs, and in this state, the heat source side circulation pump P1 and the refrigerator 2 are activated to start the heat storage operation.
[0048]
In the second embodiment as well, the heat medium liquid W having a constant flow rate is supplied to the refrigerator 2 through the constant output operation of the circulation pump P1 throughout the heat storage operation.
[0049]
(B) After the start of the heat storage operation, for each of the three extraction temperature sensors 12a, when the detected temperatures tm1 to tm3 are lowered to the set start temperature ta (see FIG. 5), the intermediate outlet corresponding to the extraction temperature sensor 12a The flow rate adjusting valve MV of Xm is opened, and the heat medium liquid extraction from the intermediate outlet Xm is started.
[0050]
Further, for each of the three extraction temperature sensors 12a, when the detected temperatures tm1 to tm3 are lowered to the set stop temperature tb that is lower than the phase change temperature tk of the latent heat storage material Z, the intermediate extraction corresponding to the extraction temperature sensor 12a is performed. The flow rate adjustment valve MV at the outlet Xm is closed, and the heat transfer fluid extraction from the intermediate outlet Xm is stopped again.
[0051]
Then, the tank heat transfer fluid W is taken out from any of the intermediate outlets Xm, and the heat transfer fluid W taken out from the intermediate outlet Xm and the heat transfer fluid W taken out from the end outlet Xs for heat storage operation, Are combined and supplied to the refrigerator 2, based on the temperature ti detected by the feed temperature sensor 12b, the temperature ti of the combined heat transfer medium W sent to the refrigerator 2 is maintained at the set feed temperature tii. The ratio of the heating medium liquid extraction flow rate from the end extraction port Xs and the heating medium liquid extraction flow rate from the intermediate extraction port Xm is adjusted by operating the flow rate adjustment valve MV with respect to the extraction ports Xs and Xm.
[0052]
Also in the second embodiment, the set start temperature ta is set to a temperature near the upper limit value of the variation range of the phase change temperature tk of the latent heat storage material Z, and the set feed temperature tii is set to the refrigerator 2. Heat transfer fluid temperature at which the refrigerator 2 can be operated in the maximum output state in the heat storage operation in which the heat transfer fluid W at a constant flow rate is supplied and the low temperature heat transfer fluid W at the set return temperature trr is returned from the refrigerator 2 to the heat storage tank 1. As a specific temperature example, as in the first embodiment, the phase change temperature tk = 5.5 to 7 ° C. of the latent heat storage material Z, the set return temperature trr = 5 ° C., the lower limit inlet of the refrigerator 2 A temperature te = 5.7 ° C., a set start temperature ta = 7 ° C., and a set stop temperature tb = 5.3 ° C. can be mentioned.
[0053]
(C) Thereafter, the detection temperature ti by the feed temperature sensor 12b (equal to the temperature ts of the heat transfer fluid W taken out from the end take-out port Xs in the situation where the heat transfer fluid extraction from all the intermediate output ports Xm is stopped) However, if it falls to the minimum inlet temperature te of the refrigerator 2, the refrigerator 2 and the heat source side circulation pump P1 will be stopped, and thermal storage operation will be complete | finished.
[0054]
That is, as in the first embodiment, until the temperature tm of the heat transfer medium liquid W taken out from the intermediate outlet Xm is lowered to the set stop temperature tb that is lower than the phase change temperature tk of the latent heat storage material Z, the intermediate outlet The intermediate temperature formed at the front end side of the low temperature region that spreads from the return port Xr side to the end outlet Xs side as the heat storage operation proceeds by taking out the heat transfer fluid W in the heat storage tank 1 through Xm In the latent heat storage system of the second embodiment, first, the tank from the intermediate outlet Xm located first from the return port Xr side is suppressed, although the growth of the layer and the progress toward the end outlet Xs are suppressed. While suppressing the growth of the intermediate temperature layer by taking out the internal heat transfer fluid W, the region between the return port Xr and the first intermediate output port Xm is made a low temperature region, followed by the second from the return port Xr side. Heat in the tank from the intermediate outlet Xm located at While suppressing the growth of the intermediate temperature layer by taking out the liquid W, the region between the first intermediate outlet Xm and the second intermediate outlet Xm is made a low temperature region, so that it is early after the start of the heat storage operation. The low temperature region is expanded to the end outlet Xs side while substantially suppressing the growth of the intermediate temperature layer from the time.
[0055]
[Third Embodiment]
FIG. 6 shows a latent heat storage system for heat, 1 is a heat storage tank, 2 is a heat pump as a heat source device, and 3 is a load device (air conditioner, fan coil unit, etc.). In this system, in the heat storage operation, the heat source side By circulating the heat transfer fluid W (for example, water) between the heat storage tank 1 and the heat pump 2 through the circulation path 4, the heat generated by the heat pump 2 is stored in the heat storage tank 1, while the load side circulation path in the heat radiation operation. By circulating the heat medium liquid W between the heat storage tank 1 and the load device 3 through 5, the load device 3 consumes the heat stored in the heat storage tank 1 in the previous heat storage operation.
[0056]
P1 is a heat source side circulation pump that circulates the heat medium liquid W between the heat storage tank 1 and the heat pump 2 in the heat storage operation, and P2 circulates the heat medium liquid W between the heat storage tank 1 and the load device 3 in the heat radiation operation. It is a load side circulation pump.
[0057]
The heat storage tank 1 is a connected heat storage tank in which a plurality of liquid tanks 1a to 1e are connected in series. In the heat storage operation, as shown by solid line arrows in the figure, one end in the column direction in the series connection row of the liquid tanks 1a to 1e. The heat medium liquid W in the tank is taken out from the liquid tank 1a (one end part of the heat storage tank 1) through the end outlet Xs for heat storage operation, and the heat transfer liquid W is taken out by the heat pump 2 and used for the heat storage operation. By returning from the return port Xr to the liquid tank 1e at the other end in the row direction in the series connection row (the other end portion of the heat storage tank 1), the liquid tanks 1a and 1e for taking out and returning at both ends in the row direction were removed. In each of the liquid tanks 1b to 1d, the heat transfer medium W in the liquid tank flows in the tank downward in a stable state over almost the entire area of the liquid tank, while the other end in the row direction (high temperature end) of the series connection row. Heat is stored in the tank sequentially from the liquid tank located on the side.
[0058]
On the contrary, in the heat dissipation operation, as indicated by the broken arrows in the figure, the heat in the tank passes from the liquid tank 1e at the other end in the row in the series connection row of the liquid tanks 1a to 1e through the end outlet Ys for heat dissipation operation. The medium liquid W is taken out, and the taken out heat medium liquid W is thermally radiated by the load device 3, and then returned from the return port Yr for heat radiation operation to the liquid tank 1 a at one end in the row direction in the series connection row. In each of the liquid tanks 1b to 1d excluding the liquid tanks 1a and 1e for taking out and returning at both ends, the heat transfer liquid W in the liquid tank flows upward in a stable state over almost the entire area of the liquid tank. As described above, the temperature reduction of the heat transfer medium W in the tank by the return heat transfer medium W from the load device 3 is sequentially advanced from the liquid tank located on the column direction one end (low temperature end) side of the series connection row. In the form, the heat stored in the tank of the heat storage tank 1 in the previous heat storage operation is consumed. Go.
[0059]
And in this 3rd Embodiment, as said connection type heat storage tank 1, specifically, the reverse weir 6 which is located in the said row direction other end side and forms the horizontal lower water channel 6a in a lower end part, and the above-mentioned A vertical water channel 8 is formed between the weirs 6 and 7 by a weir 7 which is located at one end in the row direction and forms a horizontal upper water channel 7a at the upper end, and the adjacent liquid tanks 1b to 1e are connected to each other. A heat storage tank of a mogul weir system (or improved mogul weir system) having a structure communicating through a series of communicating water channels composed of a lateral water channel 6a, a vertical water channel 8 and a lateral water channel 7a is employed.
[0060]
As in the first embodiment, among the liquid tanks 1a to 1e, latent heat is contained in the tanks of the second and third liquid tanks 1d and 1c from the other end in the column direction (high temperature end) in the series connection row of the liquid tanks. A large number of heat storage containers 9 for heat storage are installed, and in the container of the heat storage container 9, the temperature of the high-temperature heat transfer medium W required by the load device 3 or the temperature in the vicinity thereof is set to a solid phase and a liquid phase. A latent heat storage material Z ′ for heat storage having a phase change temperature tk ′ between the two is accommodated, thereby enabling heat storage by latent heat storage.
[0061]
Further, two liquid tanks 1d in the flow direction of the heat transfer liquid W in the tank in the tank lower part of the third liquid tank 1c from the other column direction other end (high temperature end) in the series connection row of the liquid tanks, that is, in the heat storage operation. , 1c, an intermediate outlet Xm is provided in the vicinity of the downstream end of the heat storage container installation area, and the heat transfer medium W taken out from the intermediate outlet Xm is extracted from the end outlet Xs for heat storage operation. A combined flow path 4 a and a combined three-way valve V are provided to be combined with the liquid W and sent to the heat pump 2.
[0062]
12a is a take-out temperature sensor for detecting the temperature tm of the heat transfer fluid W in the tank at the position where the intermediate take-out port Xm is arranged (in other words, the temperature of the heat transfer solution W taken out from the intermediate take-out port Xm), and 12b is the heat pump 2. , A feed temperature sensor for detecting the temperature ti (heat pump inlet temperature) of the combined heat transfer fluid W to be sent to, and 13 is a controller for controlling the operation of the system, and this controller 13 is the temperature sensor 12a, 12b in the heat storage operation. Based on the detected temperatures tm and ti, the following controls (a ′) to (c ′) are executed.
[0063]
(A ′) When a heat storage operation start command is given, the heat transfer liquid in the tank is stopped only from the end outlet Xs for the heat storage operation by stopping the extraction of the heat transfer liquid from the intermediate intake port Xm of the merging three-way valve V. In this state, the heat source side circulation pump P1 and the heat pump 2 are activated to start the heat storage operation.
[0064]
Note that the heat pump 2 is supplied with the heat medium liquid W at a constant flow rate throughout the heat storage operation by the constant output operation of the circulation pump P1.
[0065]
(B ′) After the start of the heat storage operation, when the detection temperature tm detected by the extraction temperature sensor 12a rises to the set start temperature ta ′, the combined three-way valve V is heated from both the end outlet Xs and the intermediate outlet Xm. The operation of the merging three-way valve V is performed so that the medium W is taken out and the temperature ti of the merging heat medium liquid W fed to the heat pump 2 is kept at the set feeding temperature ti ′ based on the temperature ti detected by the feeding temperature sensor 12b. To adjust the ratio of the heat medium liquid extraction flow rate from the end outlet Xs and the heat medium liquid extraction flow rate from the intermediate outlet Xm.
[0066]
In the third embodiment, the set start temperature ta ′ is set to a temperature close to the lower limit value of the variation range of the phase change temperature tk ′ of the latent heat storage material Z ′, and the set feed temperature ti ′ is The heat pump 2 is operated in the maximum output state in the heat storage operation in which the heat medium liquid W is supplied to the heat pump 2 at a constant flow rate and the high temperature heat medium liquid W at the set return temperature trr ′ is returned from the heat pump 2 to the heat storage tank 1. The temperature of the heat transfer fluid that can be set is set.
[0067]
(C ') Thereafter, when the detected temperature tm detected by the take-out temperature sensor 12a rises to a set stop temperature tb' that is higher than the phase change temperature tk 'of the latent heat storage material Z', the merging three-way valve V is returned from the intermediate outlet Xm. The heating medium liquid is stopped from being taken out, and the heat medium liquid W in the tank is taken out only from the end outlet Xs for the heat storage operation, and then the temperature ti (heat from the intermediate outlet Xm) detected by the feed temperature sensor 12b is set. When the medium removal is stopped, the temperature of the heat medium liquid W taken out from the end outlet Xs is equal to the temperature ts' of the heat pump 2, and the heat pump 2 and the heat source side circulation pump P1 are stopped. Then, the heat storage operation is finished.
[0068]
That is, similarly to the first embodiment, the temperature tm of the heat transfer medium liquid W taken out from the intermediate outlet Xm rises to the set stop temperature tb ′ that is higher than the phase change temperature tk ′ of the latent heat storage material Z ′. Until then, the heat transfer fluid W in the heat storage tank 1 is taken out through the intermediate outlet Xm, so that the high temperature region (latent heat storage) that expands from the return port Xr side to the end outlet Xs side as the heat storage operation proceeds. The intermediate temperature layer is formed when the intermediate temperature layer formed on the leading end side of the high-temperature heat transfer fluid liquid region that can efficiently change the phase of the material Z ′ passes through the arrangement position of the intermediate outlet Xm. A part of the medium temperature heat transfer fluid is taken out from the intermediate outlet Xm, thereby increasing the time required for heat storage and the growth of the intermediate temperature layer that causes a decrease in the amount of heat storage. To prevent the end takeout Xs from proceeding A.
[0069]
[Fourth Embodiment]
FIG. 7 also shows a latent heat storage system for heat. In this latent heat storage system, the heat transfer fluid W is caused to flow in the tank as indicated by the solid line arrow in the heat storage operation, and the broken line in the figure indicates the heat release operation. In the connected heat storage tank 1 of the mogul weir system (or improved mogul weir system) that causes the heat transfer fluid W to flow in the tank as indicated by the arrows, as in the second embodiment, among the series-connected liquid tanks 1a to 1f, In each of the four liquid tanks 1b to 1e excluding the liquid tanks 1a and 1f for taking out and returning at both ends in the series connection row of the liquid tanks, the latent heat storage material Z ′ for storing heat is stored. A large number of heat storage containers 9 are installed in a stacked state.
[0070]
Further, the third, fourth, and fifth liquid tanks 1d to 1b from the return port Xr side (high temperature end side) for heat storage operation, the upper part in each tank, that is, the heat storage of each of the three liquid tanks 1d to 1b. An intermediate outlet Xm is provided at the heat medium liquid inflow portion during operation, and the three intermediate outlets Xm are disposed in the tank during the heat storage operation with respect to the installation area of the heat storage container 9 over the four liquid tanks 1b to 1e. Dispersed in the direction of flow of W and installed in the region, and the flow rate for intermittently removing the heat transfer fluid W in the tank from each of the end outlet Xs and the three intermediate outlets Xm and adjusting the extraction flow rate A regulating valve MV is provided for each outlet Xs, Xm.
[0071]
12a is an extraction temperature for detecting the temperature tm1 to tm3 (in other words, the temperature of the heat transfer medium liquid W taken out from each intermediate output port Xm) of the in-tank heat transfer liquid W at the position where each of the three intermediate output ports Xm is disposed. The sensor 12b joins the heat transfer medium W taken out from the end outlet Zs and the heat transfer medium W taken out from each intermediate outlet Xm guided by the combined flow path 4a and sends it to the heat pump 2 to join the heat transfer medium. A feed temperature sensor for detecting the temperature ti of the liquid W (inlet temperature of the heat pump), and 13 is a controller for controlling the operation of the system. The controller 13 includes three extraction temperature sensors 12a and a feed temperature sensor 12b in the heat storage operation. Based on the detected temperatures tm1 to tm3, ti, the following controls (a ′) to (c ′) are executed.
[0072]
(A ′) When a heat storage operation start command is given, the flow rate adjusting valve MV for each of the outlets Xs, Xm is stopped, and the heat transfer fluid extraction from all the intermediate outlets Xm is stopped, and the end portion for the heat storage operation is taken. The tank heat medium liquid W is taken out only from the outlet Xs, and in this state, the heat source side circulation pump P1 and the heat pump 2 are activated to start the heat storage operation.
[0073]
Also in the fourth embodiment, the heat pump 2 is supplied with the heat medium liquid W at a constant flow rate throughout the heat storage operation by the constant output operation of the circulation pump P1.
[0074]
(B ′) After the start of the heat storage operation, when the detected temperatures tm1 to tm3 rise to the set start temperature ta ′ for each of the three extraction temperature sensors 12a, the flow rate of the intermediate outlet Xm corresponding to the extraction temperature sensor 12a The regulating valve MV is opened, and the heat medium liquid is taken out from the intermediate outlet Xm.
[0075]
Further, for each of the three extraction temperature sensors 12a, when the detected temperatures tm1 to tm3 rise to a set stop temperature tb 'that is higher than the phase change temperature tk' of the latent heat storage material Z ', the corresponding temperature of the extraction temperature sensor 12a The flow rate adjustment valve MV of the intermediate outlet Xm to be closed is closed, and the heat medium liquid extraction from the intermediate outlet Xm is stopped again.
[0076]
Then, the tank heat transfer fluid W is taken out from any of the intermediate outlets Xm, and the heat transfer fluid W taken out from the intermediate outlet Xm and the heat transfer fluid W taken out from the end outlet Xs for heat storage operation, Are combined and supplied to the heat pump 2, based on the temperature ti detected by the feed temperature sensor 12b, each temperature is adjusted so as to keep the temperature ti of the combined heat transfer medium W sent to the heat pump 2 at the set feed temperature ti '. The ratio of the heating medium liquid extraction flow rate from the end outlet Xs and the heating medium liquid extraction flow rate from the intermediate extraction port Xm is adjusted by operating the flow rate adjustment valve MV with respect to the outlets Xs and Xm.
[0077]
Also in the fourth embodiment, the setting start temperature ta ′ is set to a temperature near the lower limit value of the variation range of the phase change temperature tk ′ of the latent heat storage material Z ′, and the setting feed temperature ti ′ is set to the heat pump 2 A heat medium capable of operating the heat pump 2 in the maximum output state in a heat storage operation in which the heat medium liquid W is supplied at a constant flow rate and the high temperature heat medium liquid W at the set return temperature trr ′ is returned from the heat pump 2 to the heat storage tank 1. The liquid temperature is set.
[0078]
(C ') Thereafter, the temperature ti detected by the feed temperature sensor 12b (equal to the temperature ts of the heat transfer fluid W taken out from the end take-out ports Xs in the situation where the heat transfer fluid extraction from all the intermediate output ports Xm is stopped) ) Rises to the upper limit inlet temperature te ′ of the heat pump 2, the heat pump 2 and the heat source side circulation pump P1 are stopped and the heat storage operation is finished.
[0079]
That is, as in the third embodiment, until the temperature tm of the heat transfer medium liquid W taken out from the intermediate outlet Xm rises to the set stop temperature tb ′ higher than the phase change temperature tk ′ of the latent heat storage material Z ′. By taking out the heat transfer fluid W in the heat storage tank 1 through the intermediate outlet Xm, it is formed at the front end side of the high temperature region that spreads from the return port Xr side to the end outlet Xs side as the heat storage operation proceeds. In the latent heat storage system of the fourth embodiment, first, as in the second embodiment, first, from the return port Xr side, the growth of the intermediate temperature layer and the progress toward the end outlet Xs are suppressed. The region between the return port Xr and the first intermediate outlet Xm is made a high temperature region while suppressing the growth of the intermediate temperature layer by taking out the heat transfer liquid W in the tank from the intermediate outlet Xm located at the second position, Following that, it is located second from the return port Xr side. The region between the first intermediate outlet Xm and the second intermediate outlet Xm is made a high temperature region while suppressing the growth of the intermediate temperature layer by taking out the heat transfer liquid W in the tank from the intermediate outlet Xm. In such a form, the high temperature region is expanded toward the end outlet Xs with substantial growth suppression of the intermediate temperature layer from an early stage after the start of the heat storage operation.
[0080]
[Another embodiment]
Next, another embodiment will be listed.
[0081]
In the first to second embodiments described above, an example of using a connected heat storage tank in which a plurality of liquid tanks are connected in series has been shown, but the heat storage tank to be used may be of a single tank type, Moreover, the flow system (heat storage system) of the heat transfer medium in the heat storage tank may be either a temperature stratification system or a mixing system, and is not limited to the mogul weir system or the improved mogul weir system.
[0082]
Various liquids such as water and aqueous solutions can be used for the heat transfer liquid, and the latent heat storage material is a paraffin-based latent heat storage material for both the latent heat storage material for cold storage and the latent heat storage material for thermal storage. Initially, various materials can be used.
[0083]
The use of the stored cold or warm heat is not limited to air conditioning, and may be anything such as cooling or heating of an article.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram of a system showing a first embodiment.
FIG. 2 is a perspective view inside the tank showing the first embodiment.
FIG. 3 is a graph showing a temperature change of the heat transfer liquid in the tank in the first embodiment.
FIG. 4 is an overall configuration diagram of a system showing a second embodiment.
FIG. 5 is a graph showing the temperature change of the heat transfer liquid in the tank in the second embodiment.
FIG. 6 is an overall configuration diagram of a system showing a third embodiment.
FIG. 7 is an overall configuration diagram of a system showing a fourth embodiment.
FIG. 8 is a diagram showing a conventional system configuration
FIG. 9 is a graph showing the temperature change of the heat transfer liquid in the tank in the conventional system.
[Explanation of symbols]
Xs end outlet
W Heat transfer fluid
2 Heat source device
Xr return port
1 heat storage tank
Z, Z 'Latent heat storage material
9 Heat storage container
Xm intermediate exit
tm Temperature of the heat transfer fluid removed from the intermediate outlet
tk, tk 'Phase change temperature of latent heat storage material
tb, tb 'Set stop temperature
13 Control means
ti Temperature of heat transfer fluid sent to heat source device
ti, ti 'Set feed temperature

Claims (3)

The heat transfer liquid in the tank taken out from the end outlet at one end of the tank is cooled or heated by a heat source device, and the cold energy or the heat is stored in the tank by a heat storage operation for returning to the tank from the return port at the other end of the tank. A heat storage tank,
A latent heat storage system in which a large number of heat storage containers containing latent heat storage materials are installed in the tank of the heat storage tank in a state of being immersed in the heat medium liquid in the tank,
In the flow direction of the heat transfer liquid in the tank during the heat storage operation, the upstream side of the end outlet and the downstream side of the installation area of the heat storage container, or the intermediate position in the installation area of the heat storage container, In the heat storage operation, an intermediate outlet is provided to take out the heat medium liquid to be combined with the heat medium liquid taken out from the end outlet and sent to the heat source device from the heat storage tank,
In the heat storage operation of the cold heat storage that cools the heat medium liquid by the heat source device, when the temperature of the heat medium liquid taken out from the intermediate outlet decreases to a set stop temperature lower than the phase change temperature of the latent heat storage material,
Or, in the heat storage operation of thermal heat storage in which the heat medium liquid is heated by the heat source device, the temperature of the heat medium liquid taken out from the intermediate outlet has increased to a set stop temperature higher than the phase change temperature of the latent heat storage material When
A latent heat storage system provided with a control means for stopping the extraction of the heat transfer fluid from the intermediate outlet. Dispersing the plurality of intermediate outlets in the flow direction of the heat transfer fluid in the tank at the time of the heat storage operation, and arranging in the installation area of the heat storage container,
2. The latent heat storage system according to claim 1, wherein the control unit is configured to individually execute the stop of the extraction in accordance with the temperature of the extracted heat transfer fluid for each of the plurality of intermediate outlets. When the control means causes the heat medium liquid taken out from the end outlet and the heat medium liquid taken out from the intermediate outlet to merge and send to the heat source device, the heat medium liquid is taken out from the end outlet. The ratio of the flow rate and the heat medium liquid extraction flow rate from the intermediate outlet is adjusted to adjust the temperature of the combined heat medium liquid to be sent to the heat source device to a set feed temperature. Latent heat storage system.

Images