JP3168362B2 - Chemical heat pump refrigeration system with heat storage function and its operation method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chemical heat pump refrigeration system suitable for a cogeneration system, and more particularly, it can be driven by a low-level exhaust heat source discharged from a gas engine or the like. The present invention relates to a chemical heat pump refrigeration system having a heat storage function and a method of operating the same capable of directly generating cold heat and storing heat energy at a level lower than the atmospheric temperature when there is no cold load.

[0002]

2. Description of the Related Art In recent years, as part of an energy saving system, a so-called cogeneration system has been drawing attention, in which a generator is driven by a gas engine or the like, and at the same time, refrigeration equipment or the like is driven by exhaust heat of the gas engine. However, cogeneration systems are usually designed for daytime when there is sufficient power and heat demand, and can be operated efficiently at night when there is only a large demand for power and there is little heat demand. For this reason, the system is often shut down at night to use power purchases. As a result, the usefulness of the cogeneration system is reduced, and as the operating time is reduced, there is a problem that the amortization period of the system is prolonged. In many cases, the introduction of the cogeneration system is delayed. . To cope with this situation, it is conceivable to provide a cogeneration system with a heat storage function and to store heat during nighttime when there is no demand for heat. However, conventionally, no suitable heat storage device has been proposed.

[0003] For example, as with the cogeneration system, as a heat storage device developed based on the concept of energy saving, a compression refrigerating machine is operated by nighttime electric power, and the cold heat obtained at that time is stored, so that a heat storage device that can be used during the day is used. Are known. However, it is extremely difficult to construct the cogeneration system that utilizes waste heat using such a heat storage device driven by electric power. Moreover, this type of heat storage device sends the cold generated by the compression refrigerator to the heat transfer surface in the heat storage tank through the heat medium, and through this heat transfer surface, for example, converts water in the heat storage tank to ice. The heat is stored by this phase change, and even if it is simply considered as a heat storage device, there is a lot of heat energy loss at the time of heat storage, so a large heat transfer surface is required in the heat storage tank, and the heat storage tank is large. There was a problem of becoming.

On the other hand, apart from such a heat storage device,
The present applicant has previously proposed an adsorption-type heat storage system (see JP-A-3-91660). In this system, an adsorption regenerator having a structure substantially similar to that of the adsorption refrigerating machine is arranged at the center, and around it, means for heating and cooling the adsorbent inside the adsorption regenerator are provided. The refrigerant is desorbed by heating the adsorbent, and this state is maintained to be a heat storage state.After that, the adsorbent is cooled, the refrigerant is adsorbed, and the latent heat of evaporation and heat of adsorption at this time are used. , For supplying cold or warm heat to the user side. In heating the adsorbent, waste heat of a factory or an engine can be used, and therefore, a cogeneration system having a heat storage function can be constructed.

[0005]

However, since this adsorption type heat storage system requires a large amount of adsorbent and refrigerant only for heat storage, the cost of equipment increases and the size of the system increases as compared with its function. There was a difficulty to make it. In view of such circumstances, the present invention proposes a chemical heat pump refrigeration system that functions as a refrigerator when there is a cold load, can efficiently store cold heat when there is no cold load, and is extremely suitable for constructing a cogeneration system. It is intended to contribute to the spread of cogeneration systems.

[0006]

That is, a feature of the present invention that meets the above-mentioned object is that a plurality of adsorption towers operating as an adsorber and a regenerator are used, and the refrigerant is condensed so that the refrigerant can circulate in each adsorption tower. An adsorption refrigerator connected to an evaporator and an evaporator and operated to switch the adsorption and desorption processes so that at least one adsorption tower is in a different step from the others, and one adsorption tower of the adsorption refrigerator. A chemical heat pump refrigeration system comprising a heat storage tank connected via a first passage opening / closing means, wherein the same liquid as the refrigerant of the adsorption refrigerator is stored as a heat storage material in the heat storage tank. Is the basic configuration. Note that, instead of the adsorption refrigerator, an absorption refrigerator, which is a similar chemical heat pump, may be used, and this is described in claim 2.

[0007] According to the third and fourth aspects of the invention,
The heat storage material holding means in the heat storage tank is specified, and a polymer gel or a nonwoven fabric having a water absorbing property is arranged in the heat storage tank.

Further, the inventions according to claims 5 to 8 particularly show means for extracting cold heat after heat storage, and the following structures are added to the above-described structures, respectively. That is, in the case of the invention described in claim 5, the constitution is such that the evaporator of the adsorption refrigerator or the absorption refrigerator is connected to the heat storage tank via the second passage opening / closing means.

According to a sixth aspect of the present invention, a heat storage tank evaporator is provided, and the heat storage tank evaporator and the heat storage tank are connected via a second passage opening / closing means.

[0010] In the invention according to claim 7, a heat transfer surface connectable to an external load is provided in the heat storage tank.

Further, in the invention according to claim 8, the heat storage tank is provided with a refrigerant tank for storing the refrigerant liquid, and a circulation pump is provided between the refrigerant tank and the heat storage tank so that the refrigerant liquid can circulate. In addition to being connected by piping, a refrigerant heat exchanger is provided in the refrigerant tank.

Next, as an operation method having the above configuration, the invention according to claim 9 shows a method of a heat storage operation.
The passage opening / closing means is opened, and the heat storage material in the heat storage tank is adsorbed by at least one adsorption tower of the adsorption refrigerator operating as an adsorber, or the absorber of the absorption refrigerator, and the heat storage material is introduced into the heat storage tank. It is characterized by storing cold heat.

Further, the inventions according to claims 10 to 13 respectively show a method of utilizing operation using the system according to claims 5 to 8. In the operation method according to the tenth aspect, after the heat storage operation according to the ninth aspect, the first passage opening / closing means is closed and the second passage opening / closing means is opened to condense the refrigerant on the evaporator surface in the heat storage tank. And at this time, utilizing cold generated from the evaporator.

According to the eleventh aspect of the present invention, after the heat storage operation, the first passage opening / closing means is closed, and the second passage opening / closing means is opened, so that the refrigerant on the surface of the evaporator for the heat storage device is stored in the heat storage tank. It is characterized by condensing and utilizing the cold generated from the evaporator at this time.

In the twelfth aspect, after the heat storage operation,
At the same time as closing the first passage opening / closing means, the sensible heat and latent heat of the refrigerant stored in the heat storage tank are extracted and used by heat exchange via the heat transfer surface.

According to a thirteenth aspect of the present invention, the first passage opening / closing means is closed and the refrigerant circulation pump is driven to circulate the refrigerant liquid in the refrigerant tank into the heat storage tank. It is characterized in that the obtained cold heat is taken out and used via a refrigerant heat exchanger.

[0017]

According to the present invention, in the system according to any one of the first to eighth aspects, according to the operating method according to the ninth aspect, the first
By opening the passage opening / closing means and communicating between the adsorption tower or the absorber operating as the adsorber and the heat storage tank, the surface of the heat storage material in the heat storage tank is adsorbed to the adsorption tower or the absorber. . As a result, the heat storage material in the heat storage tank, for example,
If water, the phase changes to ice, and ice heat storage without thermal energy loss is completed.

In this case, in the system according to the third and fourth aspects, the heat storage material is absorbed and held in the polymer gel or the non-woven fabric, and it becomes ice as it is.

Next, in the case of the system according to claim 5,
When the first passage opening / closing means is closed and the second passage opening / closing means is opened after the heat storage operation as described above, the evaporator communicates with the heat storage tank. The refrigerant on the surface becomes refrigerant vapor and is adsorbed to the heat storage tank. By utilizing the latent heat of evaporation in the evaporator at this time, cold heat is extracted to the use side.

[0020] Further, the same utilization operation is described in claim 6.
In the system according to the present invention, the same operation as in the device according to the fifth aspect is performed between the heat storage tank evaporator and the heat storage tank by the operation method according to claim 11, Cold heat is extracted.

In the case of the system described in claim 7, by following the method described in claim 12, the heat storage cold heat in the heat storage tank is taken out to the utilization side via the heat transfer surface.

Further, in the system according to the eighth aspect, the method according to the thirteenth aspect is applied, and the refrigerant liquid in the refrigerant tank circulates between the heat storage tank and cools the inside of the refrigerant tank. Then, the cold heat in the refrigerant tank is taken out to the user side via the refrigerant exchanger.

In each of the above systems, the first
If the refrigerator is operated with the passage opening / closing means closed,
It goes without saying that normal refrigerator operation is performed and cold heat can be immediately supplied to the user side. Further, in the device according to claims 5 to 8, in parallel with the utilization operation after the heat storage,
If the normal refrigerator operation is performed, extremely efficient cold heat supply to the user side can be achieved.

[0024]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a piping diagram of a chemical heat pump refrigeration system according to the present invention, wherein (1) is an adsorption refrigerator,
(2) is an evaporator of the adsorption refrigerator (1), (3) is an evaporator for a heat storage tank, and (4) is a heat storage tank. All of the above devices are placed in a vacuum. Note that (5) is a use-side device connected to this system. The basic elements of this system are an adsorption refrigerator (1) and a heat storage tank (4).

The adsorption refrigerator (1) is a known type provided with a plurality of adsorption towers (6) and (6), for example, two adsorption towers (6) and (6). Group. The inside of the adsorption tower (6) is filled with water as a refrigerant and a predetermined amount of an adsorbent (not shown), and a heating heat transfer surface (7) for heating the adsorbent, And a cooling heat transfer surface (8) for cooling the cooling water. The heat transfer surfaces (7) and (8) may be used for both heating and cooling. In this case, for example, only the heat transfer surface (7) is provided, and the heat transfer surface (7) is heated. The switching source (not shown) and the like are connected to the source and the cooling source in a switchable manner. Furthermore, in the case of the drawing, the heating heat transfer surface (7) can be connected to, for example, an engine jacket of a gas engine via a hot water piping (9).
When utilizing the system of the present invention as one element of a cogeneration system, the hot water system piping (9) serves as a connection part. On the other hand, the cooling heat transfer surface (8) is connected to a cooling tower (11) via a cooling water system pipe (10). In addition, (12) and (13) are a hot water pump and a cooling water pump provided in each of the pipes (9) and (10).

A condenser (14) is connected to a cooling tower (11) like the cooling heat transfer surface (8). The evaporator (2) is connected to the adsorption tower (6) via a vacuum steam valve (15). The adsorption and desorption steps in this refrigerator are performed in a different order for each of the adsorption towers (6) and (6). Therefore, the hot water supply to each of the adsorption towers (6) and (6) is performed. The supply of the cooling water is performed via a switching mechanism (not shown) so as not to be sequentially overlapped.

On the other hand, the heat storage tank (4) is capable of storing a heat storage material (A) therein, and has a capacity equal to that of the heat storage material (A).
For example, only a capacity for installing an ice tray (not shown) for storing the water and a capacity for opening a refrigerant vapor passage (23) to be described later are required, and a conventional heat transfer space is unnecessary.
Instead of an ice tray, a high-absorbent polymer gel or a nonwoven fabric may be provided inside. In that case, the internal structure of the heat storage tank (4) is simplified. As the heat storage material (A) stored inside, the same liquid as the refrigerant of the adsorption refrigerator (1), that is, water is used. When a polymer gel or a non-woven fabric is arranged inside the heat storage tank (4), water is absorbed and held in these.

In the lower part of the heat storage tank (4), a surplus refrigerant tank (16) is provided with a pipe (18) provided with an on-off valve (17).
Connected through. This surplus refrigerant tank (16)
About the condenser (1) of the adsorption refrigerator (1),
The pipe (19) from 4) is connected to the upper part of the heat storage tank (4), and further to the pipe (20) to the evaporator (2) and the evaporator (3) for the heat storage tank via the three-way valve (29). The excess refrigerant in the heat storage tank (4) and the condenser (14) can be temporarily stored.

The heat storage tank (4) is connected to one of the adsorption towers (6) of the adsorption refrigerator (1) by a first refrigerant vapor passage (21). And this first
A three-way valve (22) is interposed in the refrigerant vapor passage (21), one of which is connected to the heat storage tank evaporator (3) through a second refrigerant vapor passage (23). Valve (22)
, The communication between the heat storage tank (4) and the adsorption tower (6) is cut off, and the heat storage tank (4) and the heat storage tank evaporator (3) are disconnected.
And can communicate with it. The heat storage tank evaporator (3) has substantially the same structure as the evaporator (2) of the adsorption refrigerator (1).

The above system is connected to the user equipment (5) by a chilled water piping (24). Cold water piping (2
Reference numeral 4) denotes a pipe for reciprocating the use-side equipment (5) via the evaporator (2) and the heat storage tank evaporator (3), and chilled water is circulated therein by driving a chilled water pump (25). In the middle of the pipe (24), the pipe (2) bypasses the heat storage tank evaporator (3) via the three-way valve (26).
7) is also connected, so that only the evaporator (2) can be connected to the use side device (5).

Next, the heat storage operation in the above refrigeration system will be described. As described above, the adsorption refrigerator (1) repeats the desorption step and the adsorption step. In the heat storage operation, these steps are performed as follows. First, in the desorption step, for example, exhaust heat is supplied from a gas engine, and the internal adsorbent is heated to about 80 ° C. via the heating heat transfer surface (7). By this heating, the adsorption tower (6) functions as a regenerator, and the adsorbent inside discharges the refrigerant that has been adsorbed so far toward the condenser (14). The discharged refrigerant vapor is condensed on the surface of the condenser (14), becomes a refrigerant liquid, flows through the pipe (19), and reaches the surplus refrigerant tank (16).

Next, in the adsorption step, the supply of the hot water is stopped, and the cooling water cooled by the cooling tower (11) is supplied to the cooling heat transfer surface (8) to cool the adsorbent. At the same time, the first refrigerant vapor passage (21) is opened by operating the three-way valve (22). Thereby, the adsorption tower (6) operates as an adsorber, and the water in the heat storage tank (4) is adsorbed by the adsorbent. Then, due to the latent heat of evaporation on the surface of the ice tray (or polymer gel or nonwoven fabric) at that time, the remaining heat storage material changes into ice. During this time, the refrigerant vapor only moves from the heat storage tank (4) to the adsorbent, and ice is generated without loss of thermal energy. In addition,
At this time, it is necessary to prevent the refrigerant in the evaporator (2) from freezing.
Refrigerant inside heat storage tank (4) with air vapor valve (15) fully closed
Only phase change to ice.

Next, when the ice heat storage is performed as described above, the utilization operation for extracting the stored cold heat to the utilization side device (5) becomes possible. In this use operation, it is of course possible to take out only the stored cold heat, but it is also possible to operate the adsorption refrigerator (1) at the same time to use the stored cold heat and the cold generated by the refrigerator (1). It can also be supplied to the user side (5). Here, the method will be described. First, pipes (2) are connected to the adsorption refrigerator (1).
0) by switching the three-way valve (29) in the condenser (14)
Pipe (19), excess refrigerant tank (16)
And a pipe (20) to feed the evaporator (2) and the heat storage tank evaporator (3). Further, the vacuum steam valve (15) is opened, and the evaporator (2) is opened by the adsorption tower (6).
Is adsorbed. Thereby, the absorption and desorption steps are performed between the adsorption tower (6), the condenser (14) and the evaporator (2), and the refrigerant evaporates from the evaporator (2) during the adsorption step.

On the other hand, regarding the heat storage cold energy, the three-way valve (2
2) is switched so that the heat storage tank (4) communicates with the heat storage tank evaporator (3). Thereby, in the ice in the heat storage tank (4), the water vapor evaporated from the heat storage tank evaporator (3) is condensed on the ice surface in the heat storage tank (4). This will be described in more detail
Then, for example, cold water of 14 ° C. is introduced into the heat transfer tube of the evaporator (2).
The evaporator (2) flows in and is cooled to 10 ° C and comes out.
The refrigerant sprayed outside the heat transfer tube flows through the tube at 14 ° C.
The water vapor heated and evaporated by the cold water is absorbed by the adsorption refrigerator.
It is adsorbed by the adhering material, and the steam temperature inside the evaporator (2) is set to 10
It is realized by keeping the temperature below ℃. The adsorbent is the water vapor
If water is not adsorbed, the water vapor temperature inside the evaporator (2)
Rise to 14 ° C and cool to 10 ° C
It becomes impossible. 10 cooled in the evaporator (2)
° C cold water flows into the heat transfer tube of the heat storage tank evaporator (3).
After cooling to 7 ° C, the heat storage tank evaporator (3)
Of refrigerant flowing outside the heat transfer tube
The water vapor heated and evaporated by the cold water operates the three-way valve (22).
Condensed on the surface of the heat source at 0 ° C. in the heat storage tank (4) through the heat storage tank
Keep the temperature of water vapor inside the evaporator (3) at 7 ° C or less
It is realized by. 7 ° C generated by the heat storage tank evaporator (3)
In the following, steam of 0 ° C or more condenses on the 0 ° C surface in the heat storage tank (4).
The effect of shrinkage is that condensation forms on the outside of the cup containing cold water in summer
It is the same as that. This action, in this case,
Continue until the heat storage material in (4) reaches 10 ° C. To this effect
The heat storage material of the heat storage tank evaporator (3) and the heat storage tank (4)
Communicate with each other so that heat transfer is possible. In addition, evaporator for heat storage tank
(3) is a saturated steam pressure of 7 ° C. (7.51 torr in the case of water)
r), the thermal storage tank (4) has a saturated steam pressure of 0 ° C (for water)
4.53 torr) but maintain both temperatures
Is higher to lower due to the pressure difference as described above.
Until the water vapor moves and equalizes the pressure.

Thus, from the above, at this time, if cold water is circulated through the cold water piping (24), the cold water at, for example, 14 ° C. before entering the evaporator (2) can be removed from the evaporator (2). ), Is cooled to, for example, 10 ° C., further cooled through the heat storage tank evaporator (3), and enters the use side device (5) at, for example, about 7 ° C.

It is also possible to control this. In this case, the three-way valve (26) of the cold water system pipe (24) is switched to the heat storage tank evaporator (3) in the direction of the bypass pipe (27). . As a result, the cold water flows only through the evaporator (2), the cold heat of 10 ° C. is supplied to the use-side device (5), and the control of the acquisition temperature in the use-side device (5) reduces the remaining heat storage amount. It can be realized without loss of energy while preserving. The bypass pipe (2) of the three-way valve (26)
The switching to the 7) side can be performed in a state where heat is not stored in the heat storage tank (4), so that the system according to the present invention can function as a completely ordinary refrigerator.

The above is the description of the configuration of the system shown in FIG. 1 and the method of operating the system. To further describe the system shown in FIG. 1, for example, the evaporator for heat storage tank (3) (2) can also be used. In such a case, the capacity control during the utilization operation is performed by taking measures such as shutting off the second refrigerant vapor passage (23).

Next, the system shown in FIGS. 2 and 3 shows another embodiment of the present invention. The system shown in FIG. 1 is different from the system shown in FIG. ing. The same elements as those in FIG. 1 are given the same numbers.

First, in the system shown in FIG. 2, the heat storage tank evaporator (3) is not provided, and the heat storage tank (4) is connected to the adsorption tower (6) by a refrigerant vapor passage (30) provided with a vacuum vapor valve (29). ). A heat transfer tube (31) is newly provided in the heat storage tank (4) through an ice tray or a polymer gel or a non-woven fabric, and is provided at the evaporator (2) outlet side of the cold water piping (24). They are connected in parallel via a three-way valve (32). In this system, the chilled water piping (24) and the user-side equipment (5) are connected to the heat exchanger (3).
3), so that more uniform cold heat can be sent to the user side.

The heat storage operation by the system shown in FIG. 2 is exactly the same as that of the system shown in FIG. 1, and the refrigerant vapor in the heat storage tank (4) is opened by opening the vacuum steam valve (29). The refrigerant liquid in the heat storage tank (4) undergoes a phase change to ice by being adsorbed to the adsorption tower (6).

The utilization operation is as follows. The vacuum steam valve (29) is closed, the pump (25) is driven, and the three-way valve (32) is operated accordingly to remove the chilled water in the chilled water piping (24). It is circulated from the evaporator (2) and the heat transfer tube (31) to the heat exchanger (33). Thus, similarly to the above, for example, cold water at 14 ° C. is cooled to 10 ° C.
To the heat exchanger (33) after being cooled to, for example, about 7 ° C. in the heat storage tank (4), and to the user-side equipment (5). The supplied cold heat of 7 ° C. is supplied. In this system, if the three-way valve (32) is switched, the cold water stops flowing in the heat transfer tube (31), and only the cold generated by the adsorption refrigerator (1) is supplied to the use side (5). Needless to say, capability control similar to the above becomes possible.

Next, in the system shown in FIG. 3, a refrigerant tank (34) is provided in addition to the heat storage tank (4). This refrigerant tank (34) utilizes the surplus refrigerant tank (16) described in FIG.
Inside 4), a refrigerant heat exchanger (35) is provided, which is connected in parallel to the chilled water piping (24) via a three-way valve (36). In this case, the heat storage operation is performed in exactly the same manner by the communication between the adsorption tower (6) and the heat storage tank (4).

In the utilization operation, in this case, the refrigerant pump (28) is driven to circulate the refrigerant liquid between the heat storage tank (4) and the refrigerant tank (34), and the pipe (20)
The three-way valve (29) is opened toward the heat storage tank (4), and the on-off valve (17) is further opened. By this circulation, the refrigerant liquid in the refrigerant tank (34) is cooled by ice in the heat storage tank (4) to become a low-temperature liquid, and cools the cold water flowing in the refrigerant heat exchanger (35). And also here, the cold water piping (24)
Cold water passes through the evaporator (2) and passes through the refrigerant heat exchanger (35).
Therefore, extremely low-temperature cold water is supplied to the user-side device (5). Also,
If the three-way valve (36) is switched from this state, the flow of cold water to the refrigerant heat exchanger (35) is stopped, and
Capability control is performed on the user side.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above embodiments, and can be modified without departing from the gist. In particular, the adsorption refrigerator used in the above embodiments may be replaced with an absorption refrigerator, and instead of the adsorption tower (6) of the adsorption refrigerator (1), the absorption refrigerator is used. If the absorber is connected to the heat storage tank (4), the above operation method can be applied as it is.

[0045]

As described above, the present invention relates to a first embodiment of an adsorption refrigerator or an absorption refrigerator and one of the adsorption towers of the adsorption refrigerator or the absorber of the absorption refrigerator. A heat storage tank connected through a passage opening / closing means, and a chemical having a heat storage function in which the same liquid as the refrigerant of the adsorption refrigerator or the absorption refrigerator is stored as a heat storage material in the heat storage tank. The heat pump refrigeration system is basically configured, and in the heat storage operation, the first passage opening / closing means is opened as described in claim 9,
An operation method in which heat storage material in a heat storage tank is adsorbed by at least one adsorption tower of an adsorption refrigerator operating as an adsorber or an absorber of an absorption refrigerator, and cold heat is stored in the heat storage tank. Therefore, the refrigerant vapor evaporated from the heat storage material is directly adsorbed to the adsorption tower (absorber),
The phase change of the heat storage material is performed without loss of thermal energy, and efficient heat storage is performed.

For this reason, a large heat transfer surface for changing the phase of the heat storage material at the time of heat storage, which is indispensable for the conventional general heat storage device, is not required, and the heat storage device is effectively reduced in size. Further, since an inexpensive refrigerant (generally water) is used for the heat storage material, there is an advantage that the equipment cost of the heat storage tank is reduced.

The invention described in claim 3 and the invention described in claim 4 are characterized in that a polymer gel and a nonwoven fabric are disposed in the heat storage tank, respectively. The phase changes while being absorbed and held by the polymer gel or the nonwoven fabric, and the heat storage operation with a simple internal structure ensures the heat storage operation.

In the system described in any one of claims 5 to 8, each of the systems described in claim 10 may be used in use operation.
The operation method according to any one of (1) to (13) is applied, in the invention according to claim 5, from the evaporator, in the invention in claim 6, from the evaporator for the heat storage tank, in the invention in claim 7, from the heat transfer surface, and According to the eighth aspect of the invention, the stored cold heat is easily extracted from the refrigerant heat exchanger in the refrigerant tank. Moreover, the cold stored heat can be taken out simultaneously with the freezing operation of the refrigerator, and by taking out the cold from both sides,
Extremely low-temperature cold heat can be efficiently supplied to the user side. In addition, this means that the capacity of the installed adsorption type (absorption type) chiller may be half that of the conventional type, which is effective in reducing the equipment cost of the chiller.

Further, the entire system according to the present invention can be easily applied to a cogeneration system due to its configuration. In this case, an adsorption type in which a chilled heat is generated by directly using exhaust heat for a chilled load. A cogeneration system that operates as an (absorption-type) refrigerator and can efficiently store cold heat using an adsorption-type (absorption-type) refrigerator when there is no cold load, so that it can operate efficiently even during periods of no heat demand. It is expected to improve its economic efficiency and use.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a chemical heat pump refrigeration system having a heat storage function according to the present invention.

FIG. 2 is an explanatory view of another embodiment of the chemical heat pump refrigeration system having a heat storage function according to the present invention.

FIG. 3 is an explanatory view showing still another embodiment of the chemical heat pump refrigeration system having a heat storage function according to the present invention.

[Explanation of symbols]

(1) Adsorption refrigerator (2) Evaporator (3) Evaporator for heat storage tank (4) Heat storage tank (6) Adsorption tower (14) Condenser (22) Three-way valve (first passage opening / closing means, second (29) Vacuum steam valve (first passage opening / closing means) (34) Refrigerant tank (35) Refrigerant heat exchanger

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Satoshi Ibe 4-1-2, Hirano-cho, Chuo-ku, Osaka-shi Inside Osaka Gas Co., Ltd. Inside Nishiyodo Air Conditioner Co., Ltd. (72) Inventor Masao Matsushita 1-5-10 Himezato, Nishiyodogawa-ku, Osaka City Inside Nishiyodo Air Conditioner Co., Ltd. Inside Nishi-Yodo Air Conditioner Co., Ltd. (72) Inventor Akiyoshi Sakai 1-5-10 Himezato, Nishiyodogawa-ku, Osaka City Inside Nishi-Yodo Air Conditioner Co., Ltd. (56) References JP-A-4-236076 (JP, A) JP-A-63-194165 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F25B 17/08

Claims (13)

(57) [Claims] 1. A plurality of adsorption towers operating as an adsorber and a regenerator are used. Each of the adsorption towers is connected to a condenser and an evaporator so that a refrigerant can be circulated, and at least one of the adsorption towers is used as another. And a heat storage tank connected to one adsorption tower of the adsorption refrigerator via a first passage opening / closing means. A chemical heat pump refrigeration system having a heat storage function, wherein the same liquid as the refrigerant of the adsorption refrigerator is stored as a heat storage material in the heat storage tank. 2. An absorption refrigerator connected to a regenerator and an absorber so that an absorbing liquid can circulate through a condenser and an evaporator, and a first passage for an absorber of the absorption refrigerator. A chemical heat pump refrigeration having a heat storage function, comprising a heat storage tank connected via opening / closing means, wherein the same liquid as the refrigerant of the absorption refrigerator is stored as a heat storage material in the heat storage tank. system. 3. The chemical heat pump refrigeration system having a heat storage function according to claim 1, wherein a polymer gel is built in the heat storage tank. 4. The chemical heat pump refrigeration system having a heat storage function according to claim 1, wherein a nonwoven fabric having a water absorbing property is built in the heat storage tank. 5. An adsorption refrigerator or an absorption refrigerator having an evaporator and a heat storage tank connected via a second passage opening / closing means. A chemical heat pump refrigeration system having the heat storage function described above. 6. An evaporator for a heat storage tank is provided separately from an evaporator of an adsorption refrigerator or an absorption refrigerator, and a second passage opening / closing means is provided between the evaporator for the heat storage tank and the heat storage tank. The chemical heat pump refrigeration system having a heat storage function according to claim 1, wherein the refrigeration system has a heat storage function. 7. The chemical heat pump refrigeration system having a heat storage function according to claim 1, wherein a heat transfer surface for taking out cold heat is provided in the heat storage tank. 8. A refrigerant tank in which a refrigerant liquid is stored is provided in a heat storage tank, and the refrigerant tank and the heat storage tank are connected by a pipe provided with a circulation pump so that the refrigerant liquid can be circulated. The chemical heat pump refrigeration system having a heat storage function according to claim 1, wherein a refrigerant heat exchanger is disposed in the refrigeration system. 9. Use of any of the chemical heat pump refrigeration systems having a heat storage function according to claim 1;
The first passage opening / closing means is opened so that the absorption tower of the adsorption type refrigerator operating as the adsorber or the absorber of the absorption type refrigerator communicates with the heat storage tank, and the heat storage material in the heat storage tank is removed by the adsorption tower or An operation method, wherein cold energy is stored in a heat storage tank by being adsorbed on an absorber. 10. A chemical heat pump refrigeration system having a heat storage function according to claim 5, wherein the first passage opening / closing means is closed after the heat storage operation according to claim 9,
An operation method comprising opening the second passage opening / closing means, condensing the refrigerant on the surface of the evaporator in the heat storage tank, and utilizing the cold generated by the evaporator at this time. 11. A chemical heat pump refrigeration system having a heat storage function according to claim 6, wherein after the heat storage operation according to claim 9, the first passage opening / closing means is closed and the second passage opening / closing means is opened. And condensing the refrigerant on the surface of the heat storage evaporator in the heat storage tank, and utilizing the cold generated from the heat storage evaporator at this time. 12. The heat storage tank according to claim 7, wherein after the heat storage operation according to claim 9, the first passage opening / closing means is closed and the heat transfer surface is used. An operating method characterized in that the sensible heat and latent heat of the refrigerant stored in the tank are taken out and used as cold heat. 13. A refrigerant tank using the chemical heat pump refrigeration system having a heat storage function according to claim 8 and driving the refrigerant circulation pump together with closing the first passage opening / closing means after the heat storage operation according to claim 9. An operation method comprising: circulating a refrigerant liquid in the refrigerant tank into a heat storage tank, cooling the refrigerant in the refrigerant tank by the circulation, and extracting and utilizing the cold heat of the refrigerant through a refrigerant heat exchanger.