JP2003227634A - Cogeneration system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cogeneration system which can be more popularly used in an area with a small electrothermal ratio by effectively using exhaust heat, and is made to cope with load fluctuation. <P>SOLUTION: This cogeneration system is provided with a taking passage 30 for taking exhaust heat generated by a power generator 11 by a heat medium. A carrier heat exchanger 41 for heat-exchanging the heat medium with a binary phase changing carrier refrigerant is connected to the taking passage 30, and a thermal storage tank 61 for storing surplus exhaust heat of the heat medium is connected thereto. A carrier passage 50 where the carrier refrigerant flows for carrying at least either exhaust heat applied from the carrier heat exchanger 41 or exhaust heat applied from the thermal storage tank 61 to the carrier refrigerant is connected to the carrier heat exchanger 41 and the thermal storage tank 61. A plurality of humidity conditioners 20 using exhaust heat distributed and carried by the carrier passage 50 are connected to the carrier passage 50. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cogeneration system, and more particularly to a waste heat transfer mechanism.

[0002]

2. Description of the Related Art Conventionally, there has been known a cogeneration system that takes out both electric power and exhaust heat from a supplied fuel to obtain a high total thermal efficiency. This cogeneration system is disclosed in JP 2001-1
As disclosed in Japanese Patent No. 93966, there is one in which a humidity controller for dehumidifying or humidifying air and a generator are combined to regenerate the adsorbent by the exhaust heat generated by the generator.
Application of this type of cogeneration system to small-scale ones such as small and medium-sized buildings and households is under study.

[0003]

As described above, the conventional cogeneration system has a problem that the efficiency of recovering the heat from the generator is poor, and thus the efficiency of the cogeneration system is poor.

In other words, in the conventional cogeneration system, since water is used as the heat medium, it is necessary to circulate the water between the plurality of humidity controllers and the generator, which requires a large carrier power and is efficient. There was a problem that was bad.

Further, for example, when the demand for electric power, which is the demand for air conditioning, is large and the demand for the humidity controller is small, the efficiency is poor and the running cost is high. There is a problem that the cogeneration system is difficult to spread in a region where the ratio of the output due to the heat is small.

When the load of the humidity controller changes,
Exhaust heat from the generator may be insufficient, or conversely, exhaust heat from the generator may be excessive. Therefore, there has been a problem that it is not possible to properly cope with the load fluctuation of the humidity controller.

The present invention has been made in view of the above points, and aims to spread the use of exhaust heat effectively in a region where the thermoelectric ratio is small and to cope with load fluctuation. The purpose is to do.

[0008]

Specifically, as shown in FIG. 1, in the first aspect of the invention, the exhaust heat generated from the generator (11) is taken out by a heat medium, while the heat medium and the two-phase change are generated. While exchanging heat with the carrier refrigerant to be carried in the carrier heat exchanger (41), the surplus waste heat of the heat medium is stored in the heat storage tank (61),
At least one of the exhaust heat applied to the carrier refrigerant from the carrier heat exchanger (41) and the exhaust heat applied to the carrier refrigerant from the heat storage tank (61) to a plurality of utilization units (20) by the carrier refrigerant. It is configured to be distributed to and conveyed.

In the second aspect of the invention, the generator (11), a take-out path (30) for taking out exhaust heat generated from the generator (11) by a heat medium, and the take-out path (30) are connected. A transfer heat exchanger (41) for exchanging heat between the heat medium and a transfer refrigerant that changes in two phases; and a heat storage tank (61) that is connected to the extraction path (30) and stores excess exhaust heat of the heat medium. , The carrier heat exchanger (41) and the heat storage tank (61) are connected to flow the carrier refrigerant, and the carrier heat exchanger (41) exhaust heat and carrier heat storage tank (61) ), A transport path (50) for transporting at least one of the exhaust heat given by (1) and a transport path (5) connected to the transport path (50).
0) and a plurality of utilization units (20) that utilize the exhaust heat distributed and conveyed.

In a third aspect based on the second aspect, the transfer heat exchanger (41) and the heat storage tank (61) are arranged relative to each other with respect to the take-out path (30) and the transfer path (50). It is configured to be connected in parallel.

A fourth aspect of the invention is based on the second aspect of the invention, wherein the heat storage tank (61) is connected to a hot water supply circuit (70) for taking out the exhaust heat stored in the heat storage tank (61). I am trying.

The fifth aspect of the present invention is the second aspect of the present invention, wherein the transfer heat exchanger (41) is connected to the take-out path (30) and the heat medium flows into the primary side inflow path (43). And an outflow path (44), and an inflow path (45) and an outflow path (46) on the secondary side, which are connected to the transfer path (50) and through which the transfer refrigerant flows. The transfer heat exchanger (41), the primary side inflow path (43) and the outflow path (44), and the secondary side inflow path (45) and the outflow path (46) form one transfer unit (4).
0) is configured.

A sixth aspect of the present invention is the same as the fifth aspect, wherein the transport unit (40) and the heat storage tank (61) are integrally formed.

A seventh aspect of the present invention is configured such that, in the second aspect, the utilization unit (20) is a humidity controller (20) for adjusting the humidity of air.

That is, according to the present invention, in the generator (11), for example, air and fuel are supplied, the combustion energy of the fuel is converted into motive power, and electric power is output.
Exhaust heat such as combustion exhaust gas is output as warm heat. And
The electric power drives, for example, the air conditioner, while the exhaust heat is taken out from the take-out path (30) by the heat medium. For example, hot water, which is a heat medium, flows through the take-out path (30) by the take-out pump (33) and then flows into the transfer unit (40). Transfer heat exchanger (41) of this transfer unit (40)
In, the heat medium exchanges heat with the carrier refrigerant in the carrier path (50), releases waste heat to the carrier refrigerant, flows through the take-out path (30), returns to the generator (11), and obtains waste heat again. The above operation is repeated.

Further, in the transfer heat exchanger (41),
The carrier refrigerant flows by obtaining a carrier force from the refrigerant pump (42), and the carrier refrigerant evaporates due to the exhaust heat of the heat medium to become a gas refrigerant. The carrier refrigerant of the gas refrigerant flows through the carrier path (50) and then to each usage unit (20). In the utilization unit (20), the carrier refrigerant exchanges heat with air, for example, to heat and condense the air to become a liquid refrigerant. Then, the carrier refrigerant of the liquid refrigerant flows through the carrier path (50),
The operation returns to the transfer heat exchanger (41), evaporates again due to the exhaust heat of the heat medium, and this operation is repeated.

Further, when the exhaust heat taken out by the heat medium with respect to the load of the humidity controller (20) is excessive, a part or all of the heat medium is stored in the heat storage tank (61) according to the surplus exhaust heat amount. It is made to flow, for example, exhaust heat is given to a heat storage agent.

On the contrary, when the exhaust heat taken out by the heat medium is insufficient for the load of the utilization unit (20), a part or all of the carrier refrigerant is supplied to the heat storage tank (61) in accordance with the insufficient heat amount. To do. In this case, the carrier refrigerant exchanges heat with the heat storage agent and evaporates due to the heat storage of the heat storage agent, then flows into the utilization unit (20) and is condensed, and this operation is repeated.

That is, in the heat storage tank (61), the exhaust heat is stored only by the heat medium, the stored exhaust heat is taken out by the carrier refrigerant, and the exhaust heat is stored at the same time by the heat medium. A mode in which heat is exchanged with the transfer refrigerant in the transfer heat exchanger (41), and the stored exhaust heat is taken out by the transfer refrigerant, and at the same time, the transfer heat exchanger (4)
There is a mode in which heat is exchanged with the heat medium in 1).

When the utilization unit (20) is, for example, a humidity controller (20), the exhaust heat is used to dehumidify or humidify the room, and the heat medium and the carrier refrigerant are circulated to generate a generator (11). The exhaust heat of is effectively used by the humidity controller (20).

[0021]

Therefore, according to the present invention, since the exhaust heat generated in the generator (11) is heat-exchanged and transferred to the carrier refrigerant that changes in two phases, the heat from the generator (11) is transferred. The collection efficiency of can be improved. As a result, system efficiency can be improved.

That is, water is circulated between the generator (11) and the carrier heat exchanger (41) as a heat medium, and between the carrier heat exchanger (41) and each utilization unit (20), Since the carrier refrigerant that changes in two phases is circulated, the circulation amount can be reduced. As a result, the transport power can be reduced as compared with the conventional one, and at the same time, the plurality of utilization units (20) can be individually dispersed.

Further, even when the demand for electric power, which is the demand for air conditioning, is large and the demand for the utilization units (20) is small, the exhaust heat is conveyed to the plurality of utilization units (20) separately distributed with a small conveying power. Therefore, the running cost can be reduced. As a result, the spread of the cogeneration system can be improved even in the region where the thermoelectric ratio is small.

Further, since the heat storage tank (61) is provided, the excess exhaust heat can be stored when the exhaust heat is excessive, while the exhaust heat is accumulated when the exhaust heat is insufficient for the load. Since heat can be used, it is possible to reliably follow load changes. As a result, comfortable air conditioning can be performed.

According to the fourth invention, the heat storage tank (61)
Since the hot water supply circuit (70) is connected to the hot water supply device, excess waste heat can be used for hot water supply, so that the waste heat can be used more efficiently.

According to the fifth aspect of the invention, since the carrying unit (40) is constructed as one unit, the installation work can be facilitated.

Further, according to the sixth aspect of the invention, since the transport unit (40) and the heat storage tank (61) are integrated, it is possible to facilitate the installation work of the unit.

Further, according to the seventh aspect of the invention, since a large number of humidity controllers (20) can be connected to the transfer heat exchanger (41), it is possible to further effectively use the exhaust heat.

[0029]

Embodiment 1 of the present invention will be described below in detail with reference to the drawings.

As shown in FIG. 1, the cogeneration system (10) of the present embodiment is configured as a small-scale system for small and medium-sized buildings or homes. The cogeneration system (10) includes a generator (11) and a plurality of humidity controllers (20), and a heat transfer circuit (which connects the generator (11) and each of the humidity controllers (20) ( 12) is equipped.

The generator (11) is configured to be supplied with fuel to generate electric power and exhaust heat. The humidity controller (20) is configured to dehumidify or humidify the air by using exhaust heat generated by the generator (11) to control the humidity, and supply the humidity-controlled air to the room.

The generator (11) is composed of, for example, one having a heat engine such as a gas turbine or gas engine, or one having a fuel cell. In the generator (11) including the heat engine, the heat engine is configured to receive supply of air and fuel, convert combustion energy of fuel into motive power, and drive the motive power. And the generator (11) is
The generated electric power is output, and the exhaust heat of the combustion exhaust gas of the heat engine is output as warm heat.

Further, in the power generator (11) equipped with the fuel cell, the fuel cell generates electric power, the electric power is output, and at the same time, the reforming section for producing hydrogen to be supplied to the fuel cell by reforming the fuel. Then, exhaust heat of at least one of the fuel cell is output as warm heat.

The heat transfer circuit (12) includes an extraction path (30) for extracting exhaust heat from the generator (11), a transfer unit (40), and a transfer path for transferring the exhaust heat to the humidity controller (20). (Five
0) and a heat storage unit (60).

The take-out path (30) constitutes a primary side circuit, is provided with a forward path tube (31) and a return path tube (32), and heat is generated between the generator (11) and the transfer unit (40). The medium is configured to circulate. The heat medium is composed of water, and the outward pipe (31) is provided with a take-out pump (33) as a take-out means.

The transfer path (50) constitutes a secondary side circuit, is provided with a forward path pipe (51) and a return path tube (52), and connects the transfer unit (40) and a plurality of humidity controllers (20). The carrier refrigerant is circulated between them. Then, the transport path (5
The forward pipe (51) and the return pipe (52) of 0) are the humidity controller (20).
Side ends correspond to the humidity controller (20), and a plurality of branch pipes (5a,
5b) and each humidity controller (20) is connected in parallel with each other.

Further, the return pipe (52) of the transfer route (50).
The branch pipe (5b) is provided with a flow control valve (53). The flow rate control valve (53) constitutes a flow rate control means for controlling the flow rate of the carrier refrigerant supplied to each humidity controller (20).

The carrier refrigerant carries heat by utilizing latent heat change, and is composed of a refrigerant that changes in two phases.
For example, as the carrier refrigerant, a hydrofluorocarbon refrigerant, CO2, a hydrocarbon refrigerant, or a water refrigerant that changes in two phases at a pressure lower than atmospheric pressure is used. In particular, when a hydrofluorocarbons refrigerant or a hydrocarbons refrigerant is used as the above-mentioned carrier refrigerant, the workability, maintainability, and reliability of the cogeneration system are improved.

The transfer unit (40) comprises a transfer heat exchanger (41) and a refrigerant pump (42) as a transfer means, and is constructed as an integrated unit. The transfer heat exchanger (41) is formed of, for example, a plate heat exchanger, and has a primary side inflow path (43) through which the heat medium of the takeout path (30) flows.
And an outflow passage (44), and an inflow passage (45) and an outflow passage (46) on the secondary side where the carrier refrigerant of the carrier passage (50) flows.

The refrigerant pump (42) is a gas pump which is provided in the outlet passage (46) on the secondary side and applies a carrying force to the carrier refrigerant in the gas phase. The transfer heat exchanger (41), the primary side inflow path (43) and the outflow path (44), the secondary side inflow path (45) and the outflow path (46), and the refrigerant pump (42) are connected to each other. It is housed in one casing and configured as one transport unit (40).

The heat storage unit (60) is configured to store excess exhaust heat when the exhaust heat taken out by the heat medium is excessive. The heat storage unit (60) includes a heat storage tank (6
1), a primary side heat exchange section (62) and a secondary side heat exchange section (63).

Although not shown, the heat storage tank (61) contains a heat storage agent, and the heat storage agent (61) has a primary side heat exchange section (6).
2) and the secondary side heat exchange section (63) are immersed.

The inflow end of the primary side heat exchange section (62) is connected to the outward pipe (31) in the take-out path (30) via the primary side flow rate control valve (64) which is a flow rate control means. 1 above
The outflow end of the secondary heat exchange section (62) is connected to the return pipe (32) in the extraction path (30). Then, when the exhaust heat of the heat medium is excessive, the heat medium flows through the primary side heat exchange section (62) and exchanges heat with the heat storage agent to store heat.

On the other hand, the inflow end of the secondary side heat exchange section (63) has a secondary side inflow path (45) in the transfer unit (40) via a secondary side flow rate control valve (65) which is a flow rate control means. ), And the outflow end of the secondary side heat exchange section (63) is connected to the secondary side outflow path (46) in the transfer unit (40). Then, when the exhaust heat of the heat medium is insufficient, the carrier refrigerant flows through the secondary side heat exchange section (63) to exchange heat with the heat storage agent to store heat and take out the exhaust heat.

The transport unit (40) and the heat storage unit (60) may be integrally formed as shown by the alternate long and short dash line in FIG.

The humidity controller (20), as shown in FIG.
The external conditioning module includes a first air passage (2a) through which the first air flows and a second air passage (2b) through which the second air flows. Further, the humidity controller (20) includes a first adsorbing element (90) and a second adsorbing element (90), and is provided for the first air passage (2a) and the second air passage (2b). An exhaust heat utilization unit for performing dehumidification and humidification is configured by switching the arrangement positions of the first adsorption element (90) and the second adsorption element (90) in a batch system.

Both ends of the first air passage (2a) and the second air passage (2b) are connected to a first four-way switching valve (21) and a second four-way switching valve (22), respectively. The first four-way switching valve (21) has an outdoor air passage (2c) for taking in outdoor air,
The ventilation passage (2d) that takes in indoor air is connected. On the other hand, the second four-way switching valve (22) is connected to an air supply passage (2e) for supplying the conditioned air into the room and an exhaust passage (2f) for discharging the treated air out of the room.

In the first four-way switching valve (21), as shown by the solid line in FIG. 2, the outside air passage (2c) communicates with the first air passage (2a) and the ventilation passage (2d) communicates with the first air passage (2d). The state in which the two air passages (2b) communicate with each other, and as shown by the broken line in FIG. 2, the outside air passage (2c) communicates with the second air passage (2b) and the ventilation passage (2d) and the first air passage ( It is configured to switch to a state in which 2a) is in communication.

In the second four-way switching valve (22), the first air passage (2a) and the air supply passage (2e) communicate with each other and the second air passage (2b), as shown by the solid line in FIG. A state in which the exhaust passage (2f) communicates with the second air passage (2b) and the air supply passage (2e) communicate with each other and the first air passage (2a) and the exhaust passage ( It is configured to switch between a state in which 2f) and 2f) are in communication with each other.

In the second air passage (2b), a heater (23) is provided on the air inflow side of the adsorbing element (90) to be regenerated. The heater (23) is for heating the second air flowing into the adsorption element (90). The heater (23) is connected to the transfer path (50) of the heat transfer circuit (12) and is configured to heat the second air by exhaust heat.

An adsorbing element (90) for adsorbing water is provided between the first air passage (2a) and the second air passage (2b).
There is provided a sensible heat exchanger (24) for exchanging heat between the first air flowing into the adsorbent (90) and the second air flowing into the regenerating adsorption element (90).

As shown in FIG. 3, each of the adsorption elements (90) is formed by alternately laminating a plurality of flat plate members (91) and a plurality of corrugated plate members (92). 92) are arranged so that the ridge directions are orthogonal to each other. The humidity control passageway (93) is provided between the flat plate members (91) of the adsorption element (90).
Alternatively, the cooling passage (94) is formed, and the humidity adjusting passage (93) and the cooling passage (94) are alternately formed.

The humidity control passages (93) are open on both side surfaces of the corrugated plate member (92) facing each other in the ridge direction, and the cooling passages (94) are adjacent to the openings of the humidity control passages (93). Both sides are open to the mating surface. That is, the humidity control passage (93) and the cooling passage (94) are formed in directions intersecting with each other.

Flat plate member (91) facing the humidity control passageway (93)
An adsorbent that adsorbs water is applied to one surface of the above and both surfaces of the corrugated plate member (92). Examples of this type of adsorbent include silica gel, zeolite, ion exchange resins and the like.

Each of the adsorption elements (90) has a humidity control passageway (93).
Are arranged so as to communicate with the first air passage (2a) or the second air passage (2b). In the adsorption element (90) communicating with the first air passage (2a), the first air is the humidity control passage (93).
And adsorb the water vapor of the first air. On the other hand, in the adsorption element (90) communicating with the second air passage (2b), the second
Air flows through the humidity control passageway (93), and water is desorbed from the adsorbent.

In the cooling passage (94) of the adsorption element (90) communicating with the first air passage (2a), the cooling fluid flows and removes the heat of adsorption generated in the humidity control passage (93) during the adsorption operation. Is configured.

<Operation> Next, the operation of the above-mentioned cogeneration system (10) will be described.

First, in the generator (11), for example,
In the one provided with a heat engine such as a gas turbine, the heat engine receives supply of air and fuel, converts combustion energy of fuel into motive power, outputs electric power, and exhaust heat of combustion exhaust gas etc. as warm heat. Is output. The heat medium and the carrier refrigerant will be described starting from the state in which they do not flow into the heat storage unit (60).

While the electric power drives, for example, the air conditioner, the exhaust heat is taken out from the take-out path (30) by the heat medium. For example, hot water that is a heat medium flows through the outward pipe (31) of the take-out path (30) by the take-out pump (33) and then flows into the transfer unit (40). In the transfer heat exchanger (41) of the transfer unit (40), the hot water exchanges heat with the transfer refrigerant of the transfer path (50), discharges waste heat to the transfer refrigerant, and returns the return pipe (30) of the extraction path (30). 32), returns to the generator (11), obtains waste heat again, and repeats the above operation.

In the transfer heat exchanger (41),
The carrier refrigerant flows by obtaining a carrier force from the refrigerant pump (42), and the carrier refrigerant evaporates due to the exhaust heat of the heat medium to become a gas refrigerant. The carrier refrigerant of the gas refrigerant flows through the outward pipe (51) of the carrier path (50) and then flows into each humidity controller (20). In the heater (23) of the humidity controller (20), the carrier refrigerant is the second
It exchanges heat with air and heats and condenses the second air to become a liquid refrigerant. After that, the carrier refrigerant of the liquid refrigerant flows through the return pipe (52) of the carrier path (50), and the carrier heat exchanger (41).
Then, the heat of the heat medium evaporates again, and this operation is repeated.

The carrier refrigerant is flow rate control valve (53) for each humidity controller (20) corresponding to the required load of the humidity controller (20).
The supply flow rate is adjusted by.

When the heat exhausted by the heat medium is excessive with respect to the load of the humidity controller (20), the primary side flow rate control valve (64) is controlled to generate heat in accordance with the surplus amount of exhaust heat. A part or all of the medium is supplied to the heat storage unit (60). in this case,
The heat medium flows through the primary side heat exchange section (62) and exchanges heat with the heat storage agent to give exhaust heat to the heat storage agent. After that, the heat medium flowing through the primary side heat exchange section (62) returns to the generator (11),
The exhaust heat is obtained again, and the above operation is repeated.

On the contrary, when the exhaust heat taken out by the heat medium is insufficient for the load of the humidity controller (20), the secondary side flow rate control valve (65) is controlled so that the liquid quantity corresponding to the insufficient heat amount is controlled. A part or all of the phase-conveying refrigerant is supplied to the heat storage unit (60). In this case, the carrier refrigerant flows through the secondary side heat exchange section (63) to exchange heat with the heat storage agent and evaporate due to the heat storage of the heat storage agent. After that, the carrier refrigerant flowing through the secondary side heat exchange section (63) flows through the outward pipe (51) of the carrier path (50) to each humidity controller (20) and is condensed. This liquid-phase carrier refrigerant is the heat storage unit (6
0) or the transfer heat exchanger (41), and the above operation is repeated.

That is, the heat storage unit (60) can be used as a mode in which exhaust heat is stored only by the heat medium, a mode in which the stored waste heat is taken out by the carrier refrigerant, and a waste heat is stored by the heat medium. At the same time, a mode in which the heat medium exchanges heat with the carrier refrigerant in the carrier heat exchanger (41),
There is a mode in which the stored exhaust heat is taken out by the carrier refrigerant and the carrier refrigerant exchanges heat with the heat medium in the carrier heat exchanger (41) at the same time.

On the other hand, the dehumidifying operation of the humidity controller (20) is as follows. During this dehumidification, the first four-way switching valve (21) and the second four-way switching valve (22) are switched to the solid line side of FIG. Then, the outdoor air flows from the outdoor air passage (2c) through the first air passage (2a) as the first air, and the first air is connected to the first air passage (2a) by the first adsorption element (9).
It flows through the humidity control passage (93) of (0). This first adsorption element (9
In 0), the first air is dehumidified by adsorbing moisture, and the dehumidified first air, the outdoor air, flows through the air supply passageway (2e) and is supplied to the room. The heat of adsorption generated in the humidity control passage (93) is removed by the cooling air.

Further, the indoor air flows from the ventilation passage (2d) as the second air in the second air passage (2b), and this second air is dehumidified in the sensible heat exchanger (24) to be the first air. The first air is cooled by exchanging heat with the air to be heated. The heated second air flows through the heater (23) and is heated by the exhaust heat of the generator (11) described above, and then the second air passage (2
Flows through the humidity control passageway (93) of the second adsorption element (90) connected to b). In the second adsorbing element (90), the second air deprives the adsorbent of moisture, and the second adsorbing element (90) is regenerated, and at the same time, the second air becomes humidified air (exhaust passage ( 2f) is released outdoors.

After that, the first adsorption element (90) is changed to the second adsorption element (90).
The second adsorption element (90) communicates with the air passageway (2b)
It switches to the state of communicating with the air passage (2b), and this switching is repeated to dehumidify the room.

Further, at the time of humidification, the first four-way switching valve (21) and the second four-way switching valve (22) are switched to the side of the broken line in FIG. Then, the outdoor air passes through the outdoor air passage (2c) to the second
As the air, it flows through the second air passage (2b), and the second air is heated by exchanging heat with the dehumidified first air in the sensible heat exchanger (24) to cool the first air. . The heated second air flows through the heater (23) and is heated by the exhaust heat of the generator (11) described above, and then the second air passage (2
Flows through the humidity control passageway (93) of the second adsorption element (90) connected to b). In this second adsorbing element (90), the second air deprives the adsorbent of moisture, and at the same time the second adsorbing element (90) is regenerated, the second air becomes humidified air and becomes the air supply passage. Supplied indoors from (2e).

Further, the indoor air flows from the ventilation passage (2d) through the first air passage (2a) as the first air, and the first air is connected to the first air passage (2a) by the first adsorption element ( 90)
Flow through the humidity control passage (93). This first adsorption element (90)
In the above, the first air is dehumidified by adsorbing moisture, and the dehumidified first air flows through the exhaust passage (2f) and is discharged to the outside of the room. The heat of adsorption generated in the humidity control passage (93) is removed by the cooling air.

After that, the first adsorption element (90) is replaced with the second adsorption element (90).
The second adsorption element (90) communicates with the air passageway (2b)
It switches to a state of communicating with the air passage (2b), and this switching is repeated to humidify the room.

<Effects of First Embodiment> As described above, according to the present embodiment, the exhaust heat generated in the generator (11) is heat-exchanged with the transfer refrigerant that changes in two phases and is transferred. The efficiency of collecting heat from the generator (11) can be improved. As a result, system efficiency can be improved.

That is, water is circulated between the generator (11) and the carrier heat exchanger (41) as a heat medium, and between the carrier heat exchanger (41) and each humidity controller (20). Since the carrier refrigerant that changes in two phases is circulated, the circulation amount can be reduced. As a result, the transport power can be reduced as compared with the conventional one, and at the same time, the plurality of humidity controllers (20) can be installed separately.

Further, even when the demand for electric power, which is the demand for air conditioning, is large and the demand for the humidity controller (20) is small,
Since the exhaust heat can be transferred to the plurality of humidity controllers (20) individually dispersed by a small transfer power, the running cost can be reduced. As a result, the spread of the cogeneration system (10) can be improved even in a region having a small thermoelectric ratio.

Further, since the transport unit (40) is constructed as one unit, the installation work can be facilitated.

Further, since a large number of humidity controllers (20) can be connected to the transfer heat exchanger (41), the exhaust heat can be used more effectively.

Further, since the heat storage tank (61) is provided, the surplus exhaust heat can be stored when the exhaust heat is surplus, while the exhaust heat stored is exhausted when the exhaust heat is insufficient for the load. Since heat can be used, it is possible to reliably follow load changes. As a result, comfortable air conditioning can be performed.

Further, if the transport unit (40) and the heat storage tank (61) are integrated, the unit can be easily installed and constructed.

[0078]

Second Embodiment Next, a second embodiment of the present invention will be described in detail with reference to the drawings.

In this embodiment, as shown in FIG. 4, in the first embodiment, the heat storage tank (61) is provided with the primary side heat exchange section (62) and the secondary side heat exchange section (63). In addition to hot water supply circuit (70)
Is connected to the heat storage tank (61).

That is, the hot water supply circuit (70) has a heat exchange section (71), and the heat exchange section (71) is provided in the heat storage tank (61). As a result, a heat medium such as tap water flows from the hot water supply circuit (70) through the heat exchange section (71) and exchanges heat with the exhaust heat stored in the heat storage tank (61) to become hot water. Used for.

Therefore, since the surplus exhaust heat can be used for hot water supply, the exhaust heat can be used more efficiently. Other configurations, operations, and effects are the same as those of the first embodiment.
Is the same as.

[0082]

Other Embodiments of the Invention In the above embodiment, the utilization unit is constituted by the humidity controller (20), but the present invention is applicable to various equipment such as a water heater as the utilization unit. Good. In short, it is sufficient to use the exhaust heat of the generator (11).

Further, it goes without saying that the utilization unit (20) is not limited to two units and may be three or more units.

Further, in the heat storage unit (60), the primary side heat exchange section (62) is connected in parallel with the transfer heat exchanger (41), but the primary side heat exchange section (62) is The transfer heat exchanger (41) may be connected in series. That is,
For example, the inflow end and the outflow end of the primary side heat exchange section (62) are connected to the return pipe (32) of the extraction path (30), and the heat medium is transferred from the generator (11) to the heat exchanger (41). Flow through the primary side heat exchange section (62) of the heat storage unit (60), and the generator (1
The circulation returning to 1) may be performed.

Further, in the heat storage unit (60), the secondary side heat exchange section (63) is connected in parallel with the transfer heat exchanger (41), but the secondary side heat exchange section (63) is The transfer heat exchanger (41) may be connected in series. That is,
For example, the inflow end and the outflow end of the secondary side heat exchange section (63) are connected to the return pipe (52) of the transfer path (50), and the transfer refrigerant is transferred from the humidity controller (20) to the heat storage unit (60). Secondary side heat exchange section (6
3), then the carrier heat exchanger (41), and the humidity controller (2
It may be possible to circulate in the flow 0).

Further, the refrigerant pump (4
In 2), a gas pump is used, but a liquid pump may be used as the refrigerant pump (42).

In addition, 2 in the above-mentioned transfer unit (40)
The gas inlet refrigerant pump (4
Instead of 2), a refrigerant pump (42) of a liquid pump may be provided, and a subcooling heat exchanger may be provided on the upstream side of the refrigerant pump (42). In this case, the subcooling heat exchanger (47) is composed of an air heat exchanger, and the liquid-phase carrier refrigerant condensed in the humidity controller (20) exchanges heat with air to be supercooled to prevent flashing. To be done.

Further, the transfer unit (40) is provided with the take-out pump (33) in the primary side inflow path (43), and the transfer unit (40) is taken as one unit including the take-out pump (33). It may be configured.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a cogeneration system showing a first embodiment of the present invention.

FIG. 2 is a schematic configuration diagram showing a humidity controller of the first embodiment.

FIG. 3 is a schematic configuration diagram showing an adsorption element in the humidity control apparatus of the first embodiment.

FIG. 4 is a schematic configuration diagram of a cogeneration system showing a second embodiment of the present invention.

[Explanation of symbols]

10 Cogeneration system 11 Generator (11) 12 Heat transfer circuit 20 Humidifier (use unit) 23 heater 30 Extraction route 33 Take-out pump 40 transport unit 41 Transport heat exchanger 42 Refrigerant pump 43,45 inflow path 44,46 Outflow path 47 Supercooling heat exchanger 50 transport route 51 Outward pipe 52 Return pipe 53 Flow control valve 60 heat storage unit 61 Heat storage tank 62 Primary heat exchange section 63 Secondary side heat exchange section 70 Hot water supply circuit 90 Adsorption element

Continued front page    F term (reference) 3L053 BC03 BC08                 3L054 BG10 BH04

Claims (7)

[Claims] 1. Exhaust heat generated from a generator (11) is taken out by a heat medium, while the heat medium and a carrier refrigerant that undergoes a two-phase change are heat-exchanged by a carrier heat exchanger (41), and the heat medium is also transferred. Excess waste heat is stored in the heat storage tank (61), and the waste heat given to the carrier refrigerant from the carrier heat exchanger (41) and the carrier heat storage tank (61)
A cogeneration system characterized in that at least one of the exhaust heat given from the exhaust heat is distributed to and transferred to a plurality of utilization units (20) by the transfer refrigerant. 2. A generator (11), a take-out path (30) for taking out exhaust heat generated from the generator (11) by a heat medium, and the take-out path (30) are connected to each other to form a two-phase with the heat medium. A transfer heat exchanger (41) for exchanging heat with the changing transfer refrigerant, a heat storage tank (61) connected to the extraction path (30) for storing excess exhaust heat of the heat medium, and the transfer heat exchanger. (41) and the heat storage tank (61) are connected to the carrier refrigerant, and the carrier heat exchanger (41) flows into the carrier refrigerant.
A transfer path (50) for transferring at least one of the exhaust heat applied from the heat storage tank (61) to the exhaust heat applied to the transfer refrigerant and the transfer path connected to the transfer path (50) ( A cogeneration system, comprising: a plurality of utilization units (20) that utilize the exhaust heat distributed and conveyed by (50). 3. The transfer heat exchanger (41) and the heat storage tank (61) according to claim 2, wherein the transfer path (30) and the transfer path (50) are connected in parallel with each other. Characteristic cogeneration system. 4. The cogeneration system according to claim 2, wherein the heat storage tank (61) is connected to a hot water supply circuit (70) for extracting exhaust heat stored in the heat storage tank (61). system. 5. The transport heat exchanger (41) according to claim 2, further comprising: a primary side inflow path (43) and an outflow path (44) to which the take-out path (30) is connected and through which the heat medium flows. The transport path (50) is connected to the secondary side inflow path (45) and outflow path (46) through which the transport refrigerant flows, and the transport heat exchanger (41) and the primary side inflow path (43) are provided. And the outflow passage (44) and the inflow passage (45) and the outflow passage (46) on the secondary side are configured in one transport unit (40). 6. The cogeneration system according to claim 5, wherein the transport unit (40) and the heat storage tank (61) are integrally formed. 7. The cogeneration system according to claim 2, wherein the utilization unit (20) is a humidity controller (20) for adjusting the humidity of air.