JPH0972579A - Heat accumulation air conditioner and its control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a heat accumulation air conditioner which can accumulate an adequate amount of heat to manage the air-conditioning load for the next day without an excess or shortage, so that such an undesirable event that the power consumption by normal operation exceeds a specified electric energy, i.e., a contract demand, and useless power consumption can be avoided, and operating costs can be reduced. SOLUTION: The air conditioning load for the next day is estimated and an air- conditioning load that can be dealt by normal operation of heat pump devices 6 and 23 within the contract demand is subtracted from the estimated air-conditioning load to obtain a remaining air-conditioning load. The heating capacity of a heat accumulation tank 21 required for managing the remaining air-conditioning load and a normal heat accumulation amount that can be produced in the heat accumulation tank 21 based on the heat accumulation capacity of the heat pump device 23 and the nighttime reduced power rate time period are obtained. When the required heating capacity is larger than the normal heat accumulation amount, the start-up time or finish time of heat accumulation operation of the heat pump device 23 is corrected corresponding to the difference between the normal heat accumulation amount and the required heating capacity.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat storage air conditioning system apparatus and a control method thereof for storing heat in a heat storage tank by using inexpensive nighttime electric power and utilizing heat radiated from the heat storage tank for daytime air conditioning.

[0002]

2. Description of the Related Art A heat storage tank and a heat source unit for storing heat in the heat storage tank and processing an air-conditioning load are provided. The heat source unit is operated with inexpensive nighttime electric power to store heat in the heat storage tank. There is a thermal storage air-conditioning system device that uses heat radiation from a thermal storage tank for air conditioning in daytime.

According to this apparatus, for example, cold heat is stored in the heat storage tank, and the cold storage heat is utilized during the daytime cooling operation, and specifically, the peak heat treatment of the cooling load is covered by the cold storage heat. , It is possible to reduce the amount of electric power used in normal operation during the daytime. As a result, it becomes possible to set a low contract power with the power company.

Also, considering the heat radiation loss of the heat storage tank and the operating efficiency (COP) of the heat source device, although the consumption of primary energy increases, the discounted rate is applied to the night power, and the power consumption rate is reduced. It can be reduced.

An example of an air conditioner having a heat storage tank is disclosed in Japanese Patent Laid-Open No. 3-91633. In this example, the air-conditioning load for the next day is predicted, and when the predicted air-conditioning load is large, heat storage operation is performed not only during the nighttime electricity discount time period but also during other time periods (excluding the air-conditioning time period). I try to increase the amount. Further, the execution time of the heat storage operation is set according to the temperature inside the heat storage tank after the air conditioning is completed.

[0006]

Although the contract electric power can be set low by utilizing the heat storage, the actual situation is that the correspondence between the heat storage amount and the electric power consumption amount is not sufficiently taken into consideration. For example, the heat storage amount may be considerably smaller than the actual air conditioning load. In this case, the air-conditioning load that cannot be covered by the heat storage is processed by the normal operation of the heat source device, so that the power usage amount increases and the power usage amount may exceed the contracted power.

Further, according to the above-mentioned publication, when it is predicted that the air-conditioning load on the next day is large, the heat storage operation is only performed on an ad hoc basis during the time period excluding the nighttime electricity charge discount time period, and the heat storage operation is also performed. Insufficient consideration is given to the correspondence between power consumption and power consumption.

[0008] For example, the heat storage amount due to the heat storage operation outside the nighttime electricity charge discount time zone may be too large.
In this case, the electric power is wastefully consumed for the excess amount of the stored heat, and the wasteful power consumption is not inexpensive nighttime power, resulting in an unnecessary increase in operating cost.

The present invention has been made in view of the above circumstances.
The heat storage air conditioning system device of the first invention enables the storage of an appropriate amount of heat without excess or deficiency corresponding to the air conditioning load of the next day, and as a result, the power usage amount during normal operation exceeds a predetermined power, for example, contract power. It is an object of the present invention to avoid the above-mentioned problem, avoid unnecessary power consumption, and reduce the operating cost.

The heat storage air conditioning system device of the second invention is, in addition to the object of the first invention, an object of always setting the start time of the heat storage operation to the best state. A heat storage air conditioning system device of a third invention is, in addition to the object of the first invention, an object of always setting the end time of the heat storage operation to the best state.

In addition to the object of the first aspect of the invention, the heat storage air conditioning system apparatus of the fourth aspect of the present invention has an object of always setting the start time and the end time of the heat storage operation to the optimum state.
The control method for the heat storage air conditioning system device of the fifth aspect of the present invention enables the storage of an appropriate amount of heat that corresponds to the air conditioning load of the next day without excess or deficiency, so that the amount of power used in normal operation exceeds a predetermined power, for example, contract power. It is an object of the present invention to avoid the troubles that occur, to avoid wasteful consumption of electric power, and to reduce operating costs.

In addition to the object of the fifth aspect of the invention, the control method of the heat storage air conditioning system apparatus of the sixth aspect of the invention aims to be able to always set the start time of the heat storage operation to the best state. Seventh
In addition to the object of the fifth aspect of the present invention, the heat storage air conditioning system control method of the present invention aims to be able to always set the end time of the heat storage operation to the best state.

In addition to the object of the fifth aspect of the invention, the control method of the heat storage air conditioning system device of the eighth aspect of the invention is to set the start time and end time of the heat storage operation to the optimum state at all times.

[0014]

A heat storage air conditioning system device of a first invention comprises a heat storage tank and a heat source device for storing heat in the heat storage tank and processing an air conditioning load, and the heat source device is predetermined. It operates during the specified nighttime electricity charge discount period to store heat in the heat storage tank and uses the heat radiation from the heat storage tank for air conditioning, and means for predicting the air conditioning load of the next day and this predicted air conditioning load. Among them, a means for obtaining a residual air conditioning load excluding an air conditioning load that can be processed by operating the heat source device within a predetermined electric power, a means for obtaining a necessary heat radiation amount of the heat storage tank necessary for processing the residual air conditioning load, and Based on the heat storage capacity and the nighttime electricity charge discount time zone, a means for obtaining the standard heat storage amount generated in the heat storage tank, and depending on the difference between the standard heat storage amount and the necessary heat radiation amount when the necessary heat radiation amount is larger than this standard heat storage amount. Open the heat storage operation by the heat source And a means for correcting the time or the end time.

That is, the air conditioning load for the next day is predicted, and the residual air conditioning load excluding the air conditioning load that can be processed by the operation of the heat source unit within the predetermined electric power is obtained from this predicted air conditioning load. The required heat radiation amount of the heat storage tank necessary for processing the residual air conditioning load is obtained, and the standard heat storage amount generated in the heat storage tank is obtained based on the heat storage capacity of the heat source device and the nighttime electricity charge discount time zone. When the required heat radiation amount is larger than the standard heat storage amount, the start time or the end time of the heat storage operation by the heat source machine is corrected according to the difference between the standard heat storage amount and the required heat radiation amount.

A heat storage air conditioning system device of a second invention is the heat storage air conditioning system device of the first invention, wherein the heat storage capacity of the heat source device is A, the standard heat storage amount generated in the heat storage tank is B, the required heat radiation amount of the heat storage tank is C, and the nighttime electricity charge. When the original start time of the heat storage operation based on the discount time zone is X and the corrected start time is Y, Y = X-{(C
-B) / A}.

The heat storage air conditioning system device of the third invention is the heat storage air conditioning system device of the first invention, wherein the heat storage capacity of the heat source device is A, the standard heat storage amount generated in the heat storage tank is B, the required heat radiation amount of the heat storage tank is C, and the nighttime electricity charge. When the original end time of the heat storage operation based on the discount time zone is X and the corrected end time is Y, Y = X + {(C
-B) / A}.

A heat storage air conditioning system device according to a fourth aspect of the present invention is the heat storage air conditioner system device according to the first aspect, wherein the heat storage capacity of the heat source device is A (kcal / h),
The standard heat storage amount generated in the heat storage tank is B (kcal), the required heat radiation amount of the heat storage tank is C (kcal), the original start time of the heat storage operation based on the nighttime electricity charge discount time zone is X, and the corrected start time is Y. , Z is the original end time of the heat storage operation based on the nighttime electricity rate discount time zone, and W is the corrected end time, (X
-Y) + (W-Z) = (C-B) / A.

According to a fifth aspect of the present invention, there is provided a heat storage air conditioning system control method, which comprises a heat storage tank and a heat source device for storing heat in the heat storage tank and processing an air conditioning load. In the heat storage air conditioning system that operates in the electricity rate discount time zone to store heat in the heat storage tank and use the heat radiation from the heat storage tank for air conditioning, the step of predicting the air conditioning load of the next day and the predicted air conditioning load A step of obtaining a residual air conditioning load excluding an air conditioning load that can be processed by operating the heat source device within a predetermined electric power; a step of obtaining a necessary heat radiation amount of the heat storage tank necessary for processing the residual air conditioning load; Of the standard heat storage amount generated in the heat storage tank based on the heat storage capacity and the nighttime electricity charge discount time zone, and when the required heat radiation amount is larger than the standard heat storage amount, the standard heat storage amount and the required heat storage amount are required. According to the difference between the amount of heat, and correcting the start time or end time of the heat storage operation by said heat source apparatus, consisting of.

A control method for a heat storage air conditioning system device according to a sixth aspect of the present invention is the control method according to the fifth aspect, wherein the heat storage capacity of the heat source unit is A
(Kcal / h), the standard amount of heat stored in the heat storage tank is B (kcal),
When the required heat radiation amount of the heat storage tank is C (kcal), the original start time of the heat storage operation based on the nighttime electricity rate discount time zone is X, and the corrected start time is Y, Y = X-{(CB ) / A}
Has the relationship

A control method for a heat storage air conditioning system apparatus according to a seventh aspect of the present invention is the control method according to the fifth aspect, wherein the heat storage capacity of the heat source unit is A
(Kcal / h), the standard amount of heat stored in the heat storage tank is B (kcal),
When the required heat radiation amount of the heat storage tank is C (kcal), the original end time of the heat storage operation based on the nighttime electricity charge discount time zone is Z, and the corrected end time is W, W = Z + {(CB) / A}
Has the relationship

A control method for a heat storage air conditioning system apparatus according to an eighth aspect of the present invention is the control method according to the fifth aspect, wherein the heat storage capacity of the heat source unit is A
(Kcal / h), the standard amount of heat stored in the heat storage tank is B (kcal),
The required heat radiation amount of the heat storage tank is C (kcal), the original start time of the heat storage operation based on the nighttime electricity charge discount time zone is X, the corrected start time is Y, and the original heat storage operation based on the nighttime electricity charge discount time zone Is Z and the corrected end time is W, there is a relationship of (X−Y) + (W−Z) = (C−B) / A.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is a cold water header, 2 is a cold water header, 3 is a hot water header, and 4 is a hot water header, each of which is connected to a load-side device (not shown) by piping.

A two-way valve 41, between the headers 1 and 2 for cold water,
The heat pump device 6 is connected to the piping via the pump 42 and the pump 5. The heat pump device 6 is also connected between the headers 3 and 4 for hot water via the two-way valves 43 and 44 and the pump 5 described above. The heat pump device 6 is
It is a heat source machine for processing the air conditioning load (cooling load and heating load), equipped with a heat pump type refrigeration cycle,
The water circulated by the operation of the pump 5 is cooled during cooling,
Heat when heating.

A two-way valve 51, between the headers 1 and 2 for cold water,
The load-side coil 11b of the heat exchanger 11 is pipe-connected via 52 and the pump 7. The load side coil 12b of the heat exchanger 12 is connected between the headers 1 and 2 for cold water via the two-way valves 61 and 62 and the pump 8. A load side coil 12b is also connected between the hot water headers 3 and 4 via the two-way valves 63 and 64 and the pump 8.

A heat storage tank 21 stores either cold heat for cooling or hot heat for heating. A cold water heat storage method or an ice heat storage method is adopted, and a hot water heat storage method is adopted. ing.

An air-cooled brine heat pump device 23 is connected to the heat storage tank 21 via two-way valves 71 and 72 and a pump 22 by piping. Air-cooled brine heat pump device 23
Is a heat source device for storing heat (storage cold heat and heat storage heat) in the heat storage tank 21 and processing an air conditioning load (cooling load and heating load), which is equipped with a heat pump type refrigeration cycle, and a pump 22. The brine circulated by the operation of is cooled during cooling and heated during heating. Of these, the cold brine obtained by the cooling action is the heat storage tank 21.
By circulating through, ice is made in the heat storage tank 21 and cold heat is stored.

The heat source side coil 11a of the heat exchanger 11 is connected to the heat storage tank 21 through the two-way valves 73 and 74 and the pump 24. Further, the heat source side coil 1 of the heat exchanger 12 is placed in parallel with the pump 22 and the air-cooled brine heat pump device 23 via the two-way valves 75 and 76.
2a is connected by piping.

On the other hand, 30 is a controller that controls the entire apparatus. This controller 30
The heat pump device 6, the air-cooled brine heat pump device 23, and the pumps 5, 7, 8, 22, 24 are connected to the.

The two-way valves 41, 42, 43, 44, 5
1,52,61,62,63,64,71,72,7
3, 74, 75, and 76 are all electromagnetic type, and these two-way valves are also connected to the controller 30.

The controller 30 has the following [1] to [5] as main functional means. Further, the mutual relationship of these functional means is shown in FIG. [1] The air-conditioning load of the next day, for example, statistical weather data,
An air conditioning load prediction means that predicts based on the current weather data, the weather forecast data for the next day, and so on.

With regard to weather data and weather forecast data, it is becoming easier to obtain, such as the creation of highly reliable data and the appearance of specialized institutions that supply it appropriately through communication lines. ing. Accordingly, the air conditioning load can be predicted with high accuracy.

[2] Of the predicted air conditioning loads, the heat pump device 6 and the air-cooled brine heat pump device 23
A required integrated heat radiation amount calculation means for obtaining a residual air conditioning load excluding an air conditioning load that can be processed in normal operation within a predetermined power of, for example, a contract power, and obtaining a necessary heat radiation amount of the heat storage tank 21 necessary for processing the residual air conditioning load.

For this processing, the ice heat storage tank heat radiation characteristic data, the ice heat storage tank ice making characteristic data, and the contract power data which are stored in advance in the internal memory are used. The contracted electric power is the upper limit of the electric power consumption contracted with the electric power company, and is set to a certain level throughout the year. The lower this setting level, the lower the price paid to the power company.

[3] Air-cooled brine heat pump device 23
A standard heat storage amount calculating means for obtaining the standard heat storage amount generated in the heat storage tank 21 based on the heat storage capacity of the above and the actual duration of the nighttime electricity rate discount time zone (time from 10 pm to 8:00 the next morning).

For this processing, the refrigerator heat storage capacity data and the standard heat storage time data stored in advance in the internal memory are used. The refrigerator heat storage capacity data represents the heat storage capacity of the air-cooled brine heat pump device 23.

[4] When the required heat radiation amount is larger than the calculated standard heat storage amount, the start time of the heat storage operation by the air-cooled brine heat pump device 23 (nighttime power consumption) according to the difference between the standard heat storage amount and the required heat radiation amount. Heat storage start time correction means for correcting the start time of the charge discount time zone).

In this processing, the standard heat storage time data in the internal memory is used in order to know the original start time of the heat storage operation based on the nighttime electricity charge discount time zone. [5] The heat storage operation by the air-cooled brine heat pump device 23 is executed in a predetermined nighttime electricity charge discount time zone (for example, from 10:00 pm to 8:00 am the next morning) and a time zone corresponding to the correction content of the heat storage start time correction means. In addition, the heat source control means for controlling the operation of the heat pump device 6, the operation of the air-cooling brine heat pump device 23, the operation of each pump, and the opening / closing of each two-way valve in accordance with the predicted air conditioning load during the time period when the heat storage operation is not performed. .

Next, the operation of the above configuration will be described with reference to FIG. Start time of heat storage operation (starting time of nighttime electricity charge discount time zone is 10:00 pm or earlier; set based on predicted air conditioning load described later)
Then, the two-way valves 71 and 72 are opened, and the heat storage operation (cooling operation) of the air-cooling brine heat pump device 23 and the operation of the pump 22 are started. As a result, ice is formed in the heat storage tank 21, and cold heat is stored in the heat storage tank 21. The remaining two-way valves except the two-way valves 71 and 72 are all closed.

After that, at the end time of the nighttime electricity charge discount time zone (8:00 am), the heat storage operation of the air-cooled brine heat pump device 23 and the operation of the pump 22 are stopped, and the two-way valves 71 and 72 are closed. .

In the time zone other than the heat storage operation, according to the cooling demand from the load side, and according to the cooling load of the day predicted by the air conditioning load predicting means in advance (including the change of the cooling load with the passage of time). , The heat pump device 6, the air-cooled brine heat pump device 23, and each pump are selectively operated, and the opening / closing of each two-way valve is controlled,
Cooling operation is performed.

For example, when the temperature is low and the cooling load is low, the two-way valves 41 and 42 are opened to start the cooling operation of the heat pump device 6 and the operation of the pump 5. Two-way valve 4
The remaining two-way valves except 1, 42 are all closed.

In this case, the water cooled by the heat pump device 6 flows to the load side by the operation of the pump 5, and the water passing through the load side returns to the heat pump device 6 and is cooled again. As a result, the cooling load is processed.

When the temperature rises and the cooling load increases, in addition to the cooling operation by the heat pump device 6, the two-way valves 61, 62, 75, 76 are further opened to perform the cooling operation of the air cooling brine heat pump device 23 and the pumps 8, 22. The operation of is started. Two-way valve 41, 42, 61, 62, 75,
The remaining two-way valves except 76 are all closed.

In this case, the brine is cooled by the air-cooled brine heat pump device 23 and circulates through the heat source side coil 12a of the heat exchanger 12 by the operation of the pump 22. Further, by operating the pump 8, water circulates between the load side coil 12b of the heat exchanger 12 and the load side. This circulating water receives the cold heat of the brine via the heat exchanger 12 and is cooled.

When the temperature further rises and the cooling load reaches the peak, in addition to the cooling operation by the heat pump device 6 and the air-cooled brine heat pump device 23, the two-way valves 51, 52, 73, 74 are opened and the pump 7 is opened. , 24 is started. Two-way valve 4 for heating control
3,44,63,64 remain closed.

In this case, by operating the pump 24, brine circulates between the heat storage tank 21 and the heat source side coil 11a of the heat exchanger 11. At this time, the cold storage heat of the heat storage tank 21 is transferred to the brine (ice is gradually melted by heat radiation). Further, by operating the pump 7, water circulates between the load side coil 11b of the heat exchanger 11 and the load side. The circulating water receives heat radiated from the heat storage tank 21, that is, cold heat via the heat exchanger 11, and is cooled.

In this way, the processing of the peak portion of the cooling load is covered by the cold storage heat of the heat storage tank 21.
In this way, the cold energy is stored in the heat storage tank 21 and the peak portion of the cooling load is processed by the cold storage heat, so that the amount of electric power used in the cooling operation of the heat pump device 6 and the air-cooled brine heat pump device 23 is suppressed to a small amount. You can Accordingly, the contract power with the electric power company can be set low.

When the heat storage operation of the air-cooled brine heat pump device 23 starts earlier than the start time (10 o'clock night) of the nighttime electricity charge discount time zone, the operating cost increases by the earlier time. Rather, the reduction in operating costs by lowering the contracted electric power is more remarkable.

Conventionally, it is common to determine the contracted electric power based on the afternoon of a summer day when the electric power consumption greatly increases, and a high fee system is decided only for a few days in the summer. Was the actual situation. This situation can be solved by using cold storage heat.

If heating is required, heat is stored in the heat storage tank 21 by the heating operation of the air-cooling brine heat pump device 23 during the nighttime electricity charge discount period, and the same operation control as described above is executed according to the change in the heating load. To be done.

Here, the setting of the start time of the heat storage operation will be described. Before entering the nighttime electricity rate discount period, the air conditioning load for the next day is predicted. Of this predicted air conditioning load, the residual air conditioning load excluding the air conditioning load that can be processed in normal operation within the contracted power of the heat pump device 6 and the air-cooling brine heat pump device 23 is obtained, and the heat storage required to process the residual air conditioning load. The required heat radiation amount of the tank 21 is obtained.

The heat storage capacity of the air-cooled brine heat pump device 23 and the actual duration of the nighttime electricity charge discount period (10 at night)
The standard heat storage amount generated in the heat storage tank 21 is obtained based on the time from the time to 8:00 in the morning). Then, the obtained standard heat storage amount and the required heat radiation amount obtained above are compared.

If the required heat radiation amount is smaller than the standard heat storage amount, the heat storage operation is executed only during the nighttime electricity charge discount period. When the required heat radiation amount is larger than the standard heat storage amount, the start time of the heat storage operation by the air-cooling brine heat pump device 23 is corrected as follows according to the difference between the standard heat storage amount and the required heat radiation amount.

The heat storage capacity of the heat source device 21 is A (kcal / h), and the standard heat storage amount generated in the heat storage tank 21 is B (kcal).
C is the required heat radiation amount of C, k is the original start time (10 pm) of the heat storage operation based on the nighttime electricity charge discount time zone, and Y is the corrected start time. Be set to the best condition.

Y = X-{(CB) / A} The corrected start time Y is before the original start time X based on the nighttime electricity charge discount time zone and enters the nighttime electricity charge discount time zone. The heat storage operation will start from the front.

As described above, by advancing the start time of the heat storage operation, the heat storage amount of the heat storage tank 21 can be increased to the required heat radiation amount C, and an appropriate amount of heat can be stored corresponding to the air conditioning load of the next day. .

If the heat storage amount is insufficient, most of the processing for the air-conditioning load depends on the normal operation of the heat pump device 6 and the air-cooled brine heat pump device 23, so that the power usage amount exceeds the contracted power. Since the amount of heat storage is necessary and sufficient, such concerns are unnecessary even if the contract power is set low.

If the heat storage operation starts before the night power charge discount time period, a high pay-per-use charge is applied to the operation outside the night power charge discount time period, which may increase the operating cost. The increase in heat storage amount due to the earlier start time is only necessary, and the increase in operating cost can be minimized.

In the above embodiment, the start time of the heat storage operation is corrected, but the end time of the heat storage operation (corresponding to the end time of the nighttime electricity charge discount time zone) is also corrected. The effect can be obtained.

In this case, the heat storage capacity of the heat source device 21 is A (kc
al / h), the standard heat storage amount generated in the heat storage tank 21 is B (kcal),
If the required heat radiation amount of the heat storage tank 21 is C (kcal), the original end time of the heat storage operation based on the nighttime electricity charge discount time zone is Z, and the corrected end time is W, W is calculated by the following formula. Set to the best condition.

W = Z + {(CB) / A} The corrected end time W is after the original end time Z based on the nighttime electricity charge discount time zone, and has passed the nighttime electricity charge discount time zone. The heat storage operation will continue up to that point.

As an embodiment in which the correction of the end time and the correction of the start time according to the above-mentioned embodiment are combined, the heat storage operation is started before the night power charge discount time zone and the night power charge discount time zone is set. The heat storage operation may be ended later.

In this case, needless to say, the total execution time of the heat storage operation is limited only to the required amount, the heat storage capacity of the heat source device 21 is A (kcal / h), and the standard heat storage amount generated in the heat storage tank 21 is B ( kcal), the required heat radiation amount of the heat storage tank 21 is C (kcal),
The original start time of the heat storage operation based on the nighttime electricity rate discount time zone is X, the corrected end time is Y, the original end time of the heat storage operation based on the nighttime electricity rate discount time zone is Z, and the corrected end time is If W is set, Y and W are calculated so as to satisfy the following equation and set to the best state.

(X−Y) + (W−Z) = (C−B) / A In the above embodiment, the heat pump device 6 and the air-cooled brine heat pump device 23 are operated during the time period when the heat storage operation is not performed. Although the operation of the pump and the opening / closing of each two-way valve are controlled according to the predicted air conditioning load, they may be controlled while detecting the actual air conditioning load.

In the above embodiment, the case where the heat storage tank 21 is an ice heat storage system for making ice to store cold heat has been described. However, it is a cold water heat storage system for storing cold heat by holding cold water or a system using a latent heat storage agent. May be. In addition, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of the invention.

[0067]

As described above, the heat storage air conditioning system device of the first invention predicts the air conditioning load of the next day, and of the predicted air conditioning loads, the air conditioning that can be processed by the operation within the predetermined power of the heat source unit. The residual air conditioning load excluding the load is calculated, the required heat radiation amount of the thermal storage tank necessary for processing this residual air conditioning load is calculated, and the thermal storage tank is calculated based on the heat storage capacity of the heat source machine and the actual duration of the nighttime electricity charge discount time zone. When the required heat radiation amount is larger than the standard heat storage amount, the standard heat storage amount generated in the above is calculated, and the start time or end time of the heat storage operation by the heat source device is corrected according to the difference between the standard heat storage amount and the necessary heat radiation amount. Therefore, it is possible to store an appropriate amount of heat without excess or deficiency corresponding to the air-conditioning load of the next day, thereby avoiding the problem that the power usage amount during normal operation exceeds a predetermined power, for example, contract power, and waste of power. Avoiding consumption, and an object thereof is attained a reduction in operating costs.

The heat storage air conditioning system device of the second invention is the heat storage air conditioning system device according to the first invention, wherein the heat storage capacity A (kcal / h), the standard heat storage amount B (kcal), the required heat radiation amount C (kcal), and the original start time X.
Based on, the corrected start time Y is Y = X-{(CB)
/ A}, the heat storage operation start time can always be set to the best state.

The heat storage air conditioning system device of the third invention is the heat storage air conditioning system device of the first invention, wherein the heat storage capacity A (kcal / h), the standard heat storage amount B (kcal), the required heat radiation amount C (kcal), and the original end time Z.
Based on, the end time W after correction is W = Z + {(C−B)
/ A}, the end time of the heat storage operation can always be set to the best state.

A heat storage air conditioning system device of a fourth invention is the heat storage air conditioning system device of the first invention, wherein the heat storage capacity A (kcal / h), the standard heat storage amount B (kcal), the required heat radiation amount C (kcal), and the original start time X. , (X−Y) + (W− based on the original end time Z.
Since the corrected start time Y and end time W are set so as to satisfy Z) = (C−B) / A, the start time and end time of the heat storage operation can always be set to the best state. .

The control method of the heat storage air conditioning system device of the fifth invention predicts the air conditioning load of the next day and, among the predicted air conditioning loads, the residual air conditioning except the air conditioning load that can be processed by the operation within the predetermined power of the heat source unit. The load is calculated, the required heat radiation amount of the heat storage tank necessary for processing the residual air conditioning load is calculated, and the standard heat storage amount generated in the heat storage tank is calculated based on the heat storage capacity of the heat source device and the actual duration of the nighttime electricity rate discount time zone. When the required heat radiation amount is larger than this standard heat storage amount, the start time or end time of the heat storage operation by the heat source machine is corrected according to the difference between the standard heat storage amount and the necessary heat radiation amount. It is possible to store an appropriate amount of heat that does not have excess or deficiency corresponding to the air conditioning load, thereby avoiding the problem that the amount of power used in normal operation exceeds a predetermined amount of power, for example, contracted power, and wastes power consumption. And aims at can be reduced operating costs.

A heat storage air conditioning system apparatus control method according to a sixth aspect of the present invention is the heat storage capacity A (kcal / h),
Based on the standard heat storage amount B (kcal), the required heat radiation amount C (kcal), and the original start time X, the corrected start time Y is Y = X-
Since it is set as {(C−B) / A}, the start time of the heat storage operation can always be set to the best state.

A heat storage air conditioning system apparatus control method according to a seventh aspect of the present invention is the heat storage capacity A (kcal / h),
Based on the standard heat storage amount B (kcal), the required heat radiation amount C (kcal), and the original end time Z, the corrected end time W is W = Z +
Since it is set as {(C−B) / A}, the end time of the heat storage operation can be always set to the best state.

A heat storage air conditioning system apparatus control method according to an eighth aspect of the present invention is the heat storage capacity A (kcal / h) according to the first aspect of the present invention.
Based on the standard heat storage amount B (kcal), the required heat radiation amount C (kcal), the original start time X, and the original end time Z, (X-Y) +
Since the corrected start time Y and end time W are set so that (W−Z) = (C−B) / A is satisfied,
Further, the start time and the end time of the heat storage operation can always be set to the best state.

[Brief description of drawings]

FIG. 1 is a diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is a block diagram showing functional means of a controller in the embodiment.

FIG. 3 is a diagram showing an example of a temporal change of an air conditioning load in the embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Cold water return header, 2 ... Cold water return header, 3 ... Hot water return header, 4 ... Hot water return header, 5 ... Pump, 6 ... Heat pump device, 7, 8 ... Pump, 11, 12 ... Heat exchanger, 21 ...
Heat storage tank, 22 ... Pump, 23 ... Air-cooled brine heat pump device, 24 ... Pump, 30 ... Controller.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Toru Miura, Toru Miura 1-34 Roppongi, Minato-ku, Tokyo, NTT F. Facilities (72) Inventor, Masaru Kojima 11 Asahi-cho, Haneda, Ota-ku, Tokyo No. 1 within EBARA CORPORATION (72) Inventor Noboru Makita 11-1 Haneda Asahi-cho, Ota-ku, Tokyo Inside EBARA CORPORATION

Claims (8)

[Claims] 1. A heat storage tank, and a heat source device for storing heat in the heat storage tank and processing an air conditioning load, and operating the heat source device in a predetermined nighttime electricity rate discount time zone to the heat storage tank. In the heat storage air conditioning system device that stores the heat of the heat storage device and uses the heat radiation from the heat storage tank for air conditioning, a means for predicting the air conditioning load of the next day, and a processing of the predicted air conditioning load within the predetermined power of the heat source unit A means for obtaining the residual air conditioning load excluding the possible air conditioning load, a means for obtaining the necessary heat radiation amount of the heat storage tank necessary for processing the residual air conditioning load, a heat storage capacity of the heat source device and a nighttime electricity charge discount time zone. Based on the means for obtaining the standard heat storage amount generated in the heat storage tank, when the required heat radiation amount is larger than the standard heat storage amount, the heat storage operation of the heat source device is performed according to the difference between the standard heat storage amount and the necessary heat radiation amount. Start time Heat storage air conditioning system apparatus characterized by being and means for correcting the end time. 2. The heat storage air conditioning system apparatus according to claim 1, wherein the heat storage capacity of the heat source device is A (kcal / h), the standard heat storage amount generated in the heat storage tank is B (kcal), and the required heat radiation amount of the heat storage tank is To C (kca
l), where X is the original start time of the heat storage operation based on the nighttime electricity rate discount time zone and Y is the corrected start time, Y = X-{(CB) / A} Heat storage air conditioning system equipment. 3. The heat storage air conditioning system device according to claim 1, wherein the heat storage capacity of the heat source device is A (kcal / h), the standard heat storage amount generated in the heat storage tank is B (kcal), and the required heat radiation amount of the heat storage tank is To C (kca
l), where Z is the original end time of the heat storage operation based on the nighttime electricity rate discount time zone and W is the end time after correction, W = Z + {(CB) / A} Heat storage air-conditioning system equipment to do. 4. The heat storage air-conditioning system device according to claim 1, wherein the heat storage capacity of the heat source device is A (kcal / h), the standard heat storage amount generated in the heat storage tank is B (kcal), and the required heat radiation amount of the heat storage tank. To C (kca
l), X is the original start time of the heat storage operation based on the nighttime electricity rate discount time zone, Y is the corrected start time, and Z is the original end time of the heat storage operation based on the nighttime electricity rate discount time zone. When the end time is W, (X−Y) + (W−Z) = (C−B) / A. 5. A heat storage tank, and a heat source device for storing heat in the heat storage tank and processing an air-conditioning load. The heat source device is operated to a heat storage tank by operating in a predetermined nighttime electricity charge discount time zone. In the heat storage air-conditioning system that uses the heat storage from the heat storage tank for air conditioning, the step of predicting the air-conditioning load for the next day, and processing of the predicted air-conditioning load within the specified power consumption of the heat source unit The steps of obtaining the residual air conditioning load excluding the possible air conditioning load, the step of obtaining the necessary heat radiation amount of the heat storage tank necessary for processing this residual air conditioning load, and the heat storage capacity of the heat source unit and the nighttime electricity charge discount time zone. Based on the step of obtaining the standard heat storage amount generated in the heat storage tank, when the required heat radiation amount is larger than the standard heat storage amount, the heat storage by the heat source device is performed according to the difference between the standard heat storage amount and the necessary heat radiation amount. Control method for regenerative air-conditioning system apparatus and correcting the start time or end time of rolling, in that it consists characterized. 6. The heat storage air conditioning system control method according to claim 1, wherein the heat storage capacity of the heat source device is A (kcal / h), the standard heat storage amount generated in the heat storage tank is B (kcal), The required heat radiation amount is C (kca
l), where X is the original start time of the heat storage operation based on the nighttime electricity rate discount time zone and Y is the corrected start time, Y = X-{(CB) / A} Method for controlling heat storage air conditioning system device. 7. The heat storage air conditioning system control method according to claim 1, wherein the heat storage capacity of the heat source device is A (kcal / h), the standard heat storage amount generated in the heat storage tank is B (kcal), The required heat radiation amount is C (kca
l), where Z is the original end time of the heat storage operation based on the nighttime electricity rate discount time zone and W is the end time after correction, W = Z + {(CB) / A} Method for controlling heat storage air conditioning system device. 8. The heat storage air conditioning system control method according to claim 1, wherein the heat storage capacity of the heat source device is A (kcal / h), the standard heat storage amount generated in the heat storage tank is B (kcal), The required heat radiation amount is C (kca
l), X is the original start time of the heat storage operation based on the nighttime electricity rate discount time zone, Y is the corrected start time, and Z is the original end time of the heat storage operation based on the nighttime electricity rate discount time zone. When the end time is W, (X−Y) + (W−Z) = (C−B) / A is a control method of the heat storage air conditioning system device.