JP4400897B2 - Thermal storage air conditioning system and operation method of thermal storage air conditioning system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a heat storage type air conditioning system and a method for operating the heat storage type air conditioning system.
[0002]
[Prior art]
For the purpose of reducing the capacity of heat sources and air-conditioning equipment by reducing the peak of air-conditioning load and reducing running costs, heat storage tanks are installed in the air-conditioning equipment, so that the time period other than the air-conditioning time period, that is, the unit price of electricity is reduced from 22:00 to the next morning By operating the air conditioner for 10 hours until 8 o'clock, heat storage tanks that store ice or hot water as a heat storage medium in the heat storage tank and use the stored heat (including cold energy) for air conditioning in the air conditioning time zone Air conditioning systems have been proposed. For example, see the description and drawings attached to the application of Japanese Patent Application No. 11-58643.
[0003]
On the other hand, recently, heat storage air passages with concrete frames have been placed at appropriate locations in the air route from the air conditioner to the air conditioned space and back to the air conditioner, and the air conditioner is operated in a time zone other than the above air conditioning time zone. A heat storage type air conditioning system has been proposed in which heat is stored in a concrete frame and the stored heat (including cold heat) is used in an air conditioning time zone. For example, see JP-A-10-220812.
[0004]
An example of the latter enclosure heat storage type air conditioning system will be described with reference to FIG. 6. For example, the one shown in FIG. 6 is configured such that the conditioned air discharged from the discharge side 102 of the air conditioner 101 is a double floor 103 such as an OA floor and a floor slab 104. It flows into the underfloor space portion 105 formed between the floor 103 and is supplied from the air outlet 106 provided in the floor 103 to the room space 107 of the room, and from the suction port 109 provided in the ceiling panel 108 to the ceiling panel 108 and the ceiling side. In the floor blowing type air conditioning system that flows into the ceiling space 110 between the floor slab 104 and passes through the space 110 to the suction side 111 of the air conditioner 101, the floor slab 104 is formed by a hollow slab having a hollow portion 112. The heat storage air passage for heat storage and heat dissipation is configured by the hollow portion 112, and the conditioned air is supplied to the heat storage air passage as necessary. It is obtained by the Suyo.
A large number of the hollow portions 112 arranged in parallel communicate with each other at the right end side in the figure to form a series path, whereby the air inlet / outlet portions at both ends of the heat storage air passage are connected to one end side of the floor slab 104, that is, It is arranged on the left end side in the figure.
In order to supply conditioned air from the discharge side 102 of the air conditioner 101 to the heat storage air passage, an air duct 113 is arranged below the floor slab 104 in the ceiling space 110 in a direction perpendicular to the hollow portion 112. A branch duct 114 is installed from the air duct 113 to one end of each series path. On the other hand, the other end side of the series path communicates with the ceiling space 110 through the opening 115.
[0005]
In such a configuration, the air conditioner 101 is operated for a necessary time in a time zone other than the above-described air conditioning time zone, that is, 10 hours from 22:00 to 8:00 the next morning when the unit price of the electric power charge is low, and mainly the conditioned air. By performing a heat storage operation in which the heat storage air passage is circulated, the heat (including cold) generated by the operation of the air conditioner 101 is stored in the floor slab 104 constituting the hollow portion 112.
And in the air-conditioning time zone, by performing the operation of flowing the conditioned air flowing to the living room space 107 to the heat storage air passage on the upstream side or the downstream side, the heat stored in the floor slab 104 is recovered by the conditioned air. The space 107 can be used for air conditioning.
In the figure, the solid and broken arrows indicate the flow of conditioned air during the heat storage operation, and the one-dot chain arrow indicates the flow of conditioned air during the air conditioning operation. In the latter air conditioning operation, the path of the conditioned air is A configuration in which a path that flows only in the ceiling space 110 and returns to the suction side 111 of the air conditioner 101 and a path that flows from the ceiling space 110 to the heat storage air passage and returns to the suction side 111 of the air conditioner 101 can be selected. A duct arrangement, a switching mechanism and the like for performing such an operation are appropriately configured. In addition, although the above example is a floor blowing system, of course, it can apply also to a ceiling blowing system.
[0006]
[Problems to be solved by the invention]
The conventional heat storage type air conditioning system described above has the following problems.
a. The thermal storage tank thermal storage air conditioning system can increase the thermal storage capacity by increasing the volume of the thermal storage tank, but both the cost and required space will increase, so the thermal storage capacity will be increased unnecessarily in small buildings. It is not possible. For this reason, conventionally, in a heat storage tank for a small-scale building, for example, the heat storage capacity is such that predetermined heat storage is completed in about 5 hours of operation, and it is desired to further increase the heat storage capacity.
b. In the frame heat storage type air conditioning system, as described above, the floor slab formed by the hollow slab is configured as a heat storage, and the air passage for heat radiation, although the heat storage efficiency is high, the initial cost is high, There is a problem that the arrangement and accommodation of the floor slab and the duct system become complicated.
The present invention aims to solve such problems.
[0007]
[Means for Solving the Problems]
In order to solve the above-described problems, in the present invention, in a frame heat storage type air conditioning system in which a heat storage air passage by a concrete frame is arranged at an appropriate position of an air path from an air conditioner to an air conditioned space and refluxed from the air conditioned space to the air conditioner The heat storage air passage is defined by a plurality of elongated spaces in the ceiling space between the floor slab and the ceiling panel, which are separated by a large beam and a small beam configured in parallel to the floor slab and communicated through a gap between each beam and the ceiling panel. In this heat storage air passage, in the heat storage air passage, it constitutes an air outlet in the ceiling that blows out the air conditioned air along the wall surface of the floor slab and the beam, the air conditioner has a heat storage tank, and other than the air conditioning time zone We propose a regenerative air conditioning system that stores heat in a heat storage tank by operation in time, and that uses the heat in the air conditioning time zone.
[0008]
Further, in the present invention, in the frame heat storage type air conditioning system in which the heat storage air passage by the concrete frame is arranged at an appropriate position of the air path from the air conditioner to the air conditioning space and refluxed from the air conditioning space to the air conditioner, the heat storage air passage is a floor slab. In the space in the ceiling between the ceiling panels , the thermal storage air is constituted by a plurality of elongated spaces that are separated by a large beam and a small beam configured in parallel to the floor slab and communicate with each other through a gap between each beam and the ceiling panel. In the passage, the ceiling air outlet that blows out the air-conditioned air along the wall surface of the floor slab and the beam is constructed, and the air conditioner has a heat storage tank, and heat is stored by operation at times other than the air-conditioning time zone. In addition to storing heat in the tank, the heat can be used in the air conditioning time zone, and heat is stored in the heat storage tank by operation during a part of the time other than the air conditioning time zone. Together, we propose a method for operating regenerative air-conditioning system for heat storage in the concrete skeleton by the operation in the remaining time of the time other than the air conditioning time zone.
[0009]
In the present invention, since the concrete frame is used for heat storage in addition to the heat storage medium in the heat storage tank, the heat storage capacity can be increased without increasing the size of the heat storage tank. By operation, both of them can be stored and used during the air conditioning time period.
Accordingly, the effects of peak cut and peak shift can be increased, and the running cost can be further reduced, and the capacity of the heat source / air conditioner can be reduced.
[0010]
And the concrete frame to store heat is not a hollow slab, but a floor slab and a beam constructed in parallel to it, so that the increase in initial cost can be reduced , and the conditioned air is supplied from the ceiling outlet. Since jetting occurs along the wall surface of the floor slab and the beam, it can flow along the wall surface over a long distance due to the Coanda effect, and heat exchange between the floor slab and the beam can be performed satisfactorily.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described with reference to FIGS.
In the figure, reference numeral 1 denotes a room in the building, reference numeral 2 denotes a concrete floor slab on the ceiling side of the living room 1, and 3 denotes a ceiling panel installed below the floor slab 2. The floor slab 2 is composed of a large beam 4 and a small beam 5 in parallel. Therefore, the space in the ceiling between the floor slab 2 and the ceiling panel 3 is divided by the beams 4 and 5. Elongated spaces 7 (7a, 7b, 7c,...) Communicating with each other through the gap 6 between the beam 5 and the ceiling panel 3 are configured in parallel.
Reference numeral 8 denotes an air conditioner, and this air conditioner 8 includes a heat source unit (not shown) and a heat storage tank 9, and heat (including cold energy) generated by the heat source unit is transferred to the living room 1 or the space 7 or the heat storage tank 9 side. It is set as the structure which can be supplied selectively.
Such an air conditioner can selectively supply, for example, the heat pump refrigerant constituting the heat source unit to the heat exchanger for the conditioned air and the heat exchanger configured in the heat storage tank 9 by switching the flow path. In addition, the heat exchanger can be configured to have a function of selectively operating as an evaporator or a condenser in a heat pump. For example, as such an air conditioner, those described in the specification and drawings attached to the above-mentioned application of Japanese Patent Application No. 11-58643 can be applied.
Reference numeral 10 denotes a forward duct configured on the discharge side of the conditioned air in the air conditioner 8, and the forward duct 10 is branched into a first forward duct 10a and a second forward duct 10b, and each duct 10a. , 10b are provided with dampers 11a, 11b so that conditioned air can be selectively supplied to these ducts 10a, 10b.
The first forward duct 10a reaches the in-ceiling air outlets 12 (12a, 12b, 12c) arranged on the respective end sides of the elongated space 7, and these in-ceiling air outlets 12 have openings such as slit shapes. Each of the spaces 7 has a shape so that conditioned air is ejected along the wall surface 13 of the floor slab 2 and the wall surfaces of the beams 4 and 5.
On the other hand, the second forward duct 10 b passes through the elongated space 7 and reaches the appropriate number of ceiling outlets 14 provided in the ceiling panel 3.
Reference numeral 15 denotes a return duct configured on the suction side of the conditioned air in the air conditioner 8 from the ceiling return port 16 disposed at a proper position in the ceiling space, and reference numeral 17 denotes a ceiling suction provided at a proper position on the ceiling panel 3. The mouth.
[0012]
In the above configuration, first, FIG. 1 shows a heat storage operation state to the concrete frame at a time other than the air-conditioning time zone, that is, at an appropriate time in the time zone from 22:00 to 8:00 the next morning, as described above. The damper 11a is open and 11b is closed.
In this operation, the refrigerant of the heat pump of the air conditioner 8 is switched to flow to the heat exchanger for conditioned air, and this heat exchanger is operated as an evaporator (cooling period) or a condenser (heating period) to generate heat (cold heat). Heat exchange with the conditioned air.
The conditioned air passing through this heat exchanger passes through the first duct 10a with the damper 11a open to the ceiling outlet 12 and from there into the space 7, the wall surface 13 of the floor slab 2 and the walls of the beams 4, 5 Erupt in the direction along
Since the conditioned air thus ejected flows along the wall surface 13 over a long distance due to the Coanda effect, heat exchange between the floor slab 2 and the beams 4 and 5 is favorably performed at this time. In addition, heat is stored in the beams 4 and 5.
On the other hand, since the air in the ceiling space is sucked from the ceiling return port 16 to the suction side of the air conditioner 8 through the return duct 15, as described above, along the wall surface 13 of the floor slab 2 while exchanging heat. Finally, the conditioned air that has flowed away leaves the wall surface 13, flows below the floor slab 2, reaches the ceiling return port 16, and then returns to the suction side of the air conditioner 8 through the return duct 15.
In this operation, the conditioned air does not flow into the living room space 20, and thus air conditioning is not performed.
[0013]
Next, FIG. 2 shows the heat storage operation state to the heat storage tank 9 in the heat storage time zone, and both the dampers 11a and 11b are closed. In addition, the air conditioning fan is stopped.
In this operation, the refrigerant of the heat pump of the air conditioner 8 is switched to flow to the heat exchanger in the heat storage tank 9, and this heat exchanger is operated as an evaporator (cooling period) or a condenser (heating period) to generate heat ( The heat storage medium 9 in the heat storage tank 9, for example, water is cooled (cooling period) and iced to make ice or heated (heating period) to store heat as hot water.
[0014]
Next, FIG. 3 shows the air-conditioning operation state in the air-conditioning time zone, in which the damper 11a is closed and 11b is open.
In this operation, the refrigerant of the heat pump of the air conditioner 8 is switched to flow to the heat exchanger for conditioned air in the same manner as in the heat storage operation state of the concrete frame, and this heat exchanger is switched to an evaporator (cooling period) or a condenser. It is operated as (heating period) to generate heat (including cold heat), and the heat of the heat storage tank 9 is also used to increase the capacity to exchange heat with the conditioned air.
The conditioned air passing through this heat exchanger reaches the ceiling outlet 14 through the second duct 10b with the damper 11b open, and then blows out into the living room 1 for air conditioning. On the other hand, the air in the living room 1 reaches the ceiling space from the ceiling suction port 17, flows through the elongated space 7, reaches the return port 16 in the ceiling in the same manner as the heat storage operation described above, and then air-conditions through the return duct 15. Reflux to the suction side of the machine 8.
Thus, when the air in the living room 1 flows through the elongate space 7 in the ceiling space, heat is exchanged with the floor slab 2 and the beams 4 and 5, and the heat stored so far is recovered, and air conditioning is performed in this state. Since the air is recirculated to the machine 8, the load on the air conditioner 8 is reduced. Therefore, the heat stored by the operation in the heat storage time zone described above can be effectively used in the air conditioning time zone.
In such an air conditioning operation, the refrigerant of the heat pump of the air conditioner 8 flows into the heat exchanger for conditioned air as described above, and also flows into the heat exchanger in the heat storage tank 9, so that in the above heat storage operation. The heat stored in the heat storage medium in the heat storage tank 9 can be used for air conditioning.
[0015]
In the present invention, as shown in each of the above operating states, since the concrete frame is used for heat storage in addition to the heat storage medium in the heat storage tank 9, the heat storage capacity can be increased without increasing the size of the heat storage tank 9. Therefore, the effect of peak cut and peak shift can be increased, and the running cost can be further reduced and the capacity of the heat source / air conditioner can be reduced.
[0016]
And in this invention, the concrete frame to store heat is not a hollow slab as described above, but by using the floor slab 2 and the beams 4 and 5 configured in parallel thereto, the increase in initial cost can be reduced, It can also be applied to existing buildings.
On the other hand, in the heat storage time zone, a part of the heat stored in the floor slab 2, the large beam 4 and the small beam 5 leaks to the indoor side through the ceiling panel 3, but this heat also exchanges heat with indoor furniture and walls, Since these are stored in heat and used during the air conditioning time period, there is no complete loss.
In addition, in the present invention, the amount of concrete is smaller than that of a hollow slab, so the amount of heat storage is reduced, but the entire building is lighter and the cost is reduced, and the floor slab and duct system are simplified in engagement and storage. In this respect, the initial cost can be reduced.
[0017]
FIG. 5 is a time chart showing an example of the transition of the daily operation of the air conditioner 8 in the present invention.
The heat storage capacity of the heat storage medium in the heat storage tank 9 in the air conditioner 8 of this example is a capacity at which predetermined heat storage is performed in a heat storage operation of about 5 hours in the cooling period, for example.
For this reason, in the heat storage operation time zone of 10 hours from 22:00 to 8:00 the next morning when the electricity rate is reduced, first, the heat storage operation for storing heat in the heat storage medium in the heat storage tank 9 for 5 hours from 22:00 to 3:00. That is, a heat storage tank heat storage operation is performed, and a heat storage operation in which heat is stored in the concrete frame for 5 hours from 3 o'clock to 8 o'clock after predetermined heat storage is performed by this operation, that is, a frame heat storage operation is performed.
By doing so, heat can be stored in both the heat storage medium and the concrete frame in the heat storage tank 9, and the heat stored in these can be used for air conditioning operation in the air conditioning time zone from 8:00 to 22:00. .
In addition, the order and operation mode of the heat storage tank heat storage operation and the housing heat storage operation can be appropriately set in addition to the above.
[0018]
Moreover, although the air conditioning system in the above embodiment is a ceiling blowing system, this invention is applicable also to a floor blowing system as shown in FIG.
[0019]
【The invention's effect】
Since the present invention is as described above, the following effects are obtained.
a. Since the concrete frame is used for heat storage in addition to the heat storage medium in the heat storage tank, it is possible to increase the heat storage capacity without increasing the size of the heat storage tank, thus increasing the effects of peak cut and peak shift. As a result, the running cost can be further reduced, and the capacity of the heat source / air conditioner can be reduced.
b. The concrete frame that stores heat is not a hollow slab, but a floor slab and a beam constructed in parallel with it, so that the increase in initial cost can be reduced, and the floor slab and duct system can be kept in contact with each other. It is simplified and can be applied to existing buildings.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional system explanatory diagram showing the configuration and operation of an embodiment of an air conditioning system according to the present invention in a housing heat storage operation state.
FIG. 2 is a partial cross-sectional system explanatory diagram showing the configuration and operation of the embodiment of the air conditioning system according to the present invention in a heat storage tank heat storage operation state;
FIG. 3 is a partial cross-sectional system explanatory diagram showing the configuration and operation of an air conditioning system according to an embodiment of the present invention in an air conditioning operation state;
4A and 4B are explanatory views showing a configuration of a floor slab portion constituting the air conditioning system of the present invention, in which FIG. 4A is a sectional view and FIG. 4B is an explanatory plan view.
FIG. 5 is a time chart showing an embodiment of the operation method of the air conditioning system of the present invention.
FIG. 6 is a perspective view showing a conventional example of an air conditioning system using housing heat storage.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Living room 2 Floor slab 3 Ceiling panel 4 Large beam 5 Small beam 6 Gap 7 (7a, 7b, 7c, ...) Elongated space 8 Air conditioner 9 Heat storage tank 10 Outward duct 10a First forward duct 10b Second forward duct 11 ( 11a, 11b) Damper 12 (12a, 12b, 12c) Air outlet 13 Wall surface 14 Ceiling outlet 15 Return duct 16 Return port 17 in ceiling 17 Ceiling inlet

Claims (2)

In an enclosure thermal storage air conditioning system in which a thermal storage air passage with a concrete enclosure is placed at an appropriate location in the air path from the air conditioning unit to the air conditioning space and back to the air conditioning unit, the thermal storage air passage is located between the floor slab and the ceiling panel. The internal space is composed of a plurality of elongate spaces separated by large beams and small beams configured in parallel to the floor slab, and communicated through gaps between the beams and the ceiling panel. The ceiling air outlet that blows out along the wall surface of the floor slab and the beam, the air conditioner has a heat storage tank, stores heat in the heat storage tank by operation at times other than the air conditioning time zone, and Thermal storage air conditioning system characterized in that heat can be used in the air conditioning time zone In an enclosure thermal storage air conditioning system in which a thermal storage air passage with a concrete enclosure is placed at an appropriate location in the air path from the air conditioning unit to the air conditioning space and back to the air conditioning unit, the thermal storage air passage is located between the floor slab and the ceiling panel. The internal space is composed of a plurality of elongate spaces separated by large beams and small beams configured in parallel to the floor slab, and communicated through gaps between the beams and the ceiling panel. The air outlet is configured to have a heat storage tank, and heat is stored in the heat storage tank by operation at times other than the air conditioning time zone. The heat can be used in the air conditioning time zone, and heat is stored in the heat storage tank by operation during a part of the time other than the air conditioning time zone. The method of operating a regenerative air-conditioning system which is characterized in that the heat storage in the concrete skeleton by the operation in the remaining time of the outside of the time

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