JP7118270B2 - Air-conditioning system control device, air-conditioning system control method, and air-conditioning system - Google Patents

Description

The present invention relates to an air-conditioning system control device, an air-conditioning system control method, and an air-conditioning system that create and control an operation plan for an air-conditioner.

Conventionally, there is an air conditioning system that predicts the load of a building, creates an operation plan for air conditioners based on the predicted load, and operates the air conditioners according to the created operation plan (see Patent Document 1, for example). In this air-conditioning system, since an operation plan is created in consideration of the load of the building, air-conditioning can be performed efficiently, and power consumption can be reduced.

JP 2011-214794 A

By the way, conventionally, there are heat storage air conditioners that perform heat storage operation in which cold heat generated by circulating a refrigerant is stored in a heat storage tank and heat storage use operation in which air conditioning is performed using the cold heat in the heat storage tank. There is an air conditioning system with a refrigerant air conditioner of

In this type of air-conditioning system, it is conceivable to control each air conditioner to operate based on an operation plan, as in Patent Document 1. However, Patent Literature 1 does not consider re-planning of the operation plan when an air conditioner scheduled to operate fails. For this reason, there is a possibility that the power consumption reduction effect cannot be obtained in the operation after the occurrence of the failure of the air conditioner.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an air-conditioning system controller, an air-conditioning system control method, and an air-conditioning system capable of reducing power consumption even when an air conditioner fails. With the goal.

A control device for an air conditioning system according to the present invention uses a plurality of refrigerant air conditioners that perform air conditioning by circulating a refrigerant, a heat storage operation that stores the cold heat generated by circulating the refrigerant in a heat storage tank, and the cold heat in the heat storage tank. A control device for an air-conditioning system that air-conditions a building, comprising: a heat-storage air conditioner that performs heat-storage operation for air-conditioning, and an information acquisition unit that acquires weather forecast data; A load prediction unit that predicts; an operation plan creation unit that creates an operation plan so as to reduce the power consumption of the air conditioning system based on the load predicted by the load prediction unit and weather forecast data; and an air conditioning system according to the operation plan. a control command instruction unit that controls the operation of a plurality of refrigerant air conditioners; a failure detection unit that detects failures in each of a plurality of refrigerant air conditioners; and a repair time predicting unit for predicting a repair time required for repair, and the operation planning unit re-plans the operation plan based on the repair time when a failure is detected.

According to the present invention, the repair time required to repair a failed unit is predicted, and the operation plan is rescheduled based on the predicted result, so power consumption can be reduced even when a refrigerant air conditioner fails. be able to.

It is a figure showing composition of an air-conditioning system of an embodiment. It is a figure which shows the functional structure of the control apparatus of the air conditioning system of embodiment. It is a figure which shows an example of the fault database which concerns on embodiment. It is a figure which shows the hardware constitutions of the control apparatus of the air conditioning system which concerns on embodiment. 4 is a flow chart showing the flow of failure handling operation control in the control device for the air conditioning system according to the embodiment. FIG. 4 is a diagram showing outside air temperature-COP characteristics of each air conditioner of the air conditioning system according to the embodiment; It is the figure which showed the load of the building predicted in the air-conditioning system which concerns on embodiment with an operation plan. FIG. 8 is a diagram showing an operation plan after re-planning based on the operation plan of FIG. 7 and showing an example in which the refrigerant air conditioner A is not restored by 18:00; FIG. 9 is a diagram corresponding to FIGS. 7 and 8 and showing changes in the operation period of each of the refrigerant air conditioner B and the heat storage air conditioner C. FIG. FIG. 8 is a diagram showing an operation plan after re-planning based on the operation plan of FIG. 7 and showing an example in which the refrigerant air conditioner A is restored by 18:00; FIG. 11 is a diagram corresponding to FIG. 10 and showing changes in the operation period of each air conditioner; FIG. 10 is an explanatory diagram of re-planning of the operation plan in the control device of the air-conditioning system according to the embodiment, and is a diagram showing an example when there is a capacity condition; FIG. 13 is a diagram showing an operation plan after re-planning based on the operation plan of FIG. 12 and showing an example in which the refrigerant air conditioner A is not restored by 18:00. FIG. 13 is a diagram showing an operation plan after re-planning based on the operation plan of FIG. 12 and showing an example in which the refrigerant air conditioner A is restored by 18:00.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Also, various specific setting examples described in the present embodiment are merely examples, and the present invention is not particularly limited to these.

Drawing 1 is a figure showing composition of an air-conditioning system of an embodiment.
The air conditioning system has an air conditioner A, an air conditioner B, a heat storage air conditioner C, and a control device 1 . The air conditioner A includes an outdoor unit 10 and an indoor unit 11 connected to the outdoor unit 10 by refrigerant pipes. The air conditioner B includes an outdoor unit 20 and an indoor unit 21 connected to the outdoor unit 10 by refrigerant piping. The air conditioner A and the refrigerant air conditioner B each include a refrigerant circuit in which refrigerant circulates through a compressor, a condenser, a decompression device, and an evaporator. Air conditioning inside.

The heat storage air conditioner C includes an outdoor unit 30 , an indoor unit 31 , and a heat storage tank 32 . The outdoor unit 30 and the heat storage tank 32 are connected by a refrigerant pipe to form a refrigerant circuit. The heat storage tank 32 and the indoor unit 31 are connected by a heat medium pipe through which a heat medium such as water passes to form a heat medium circuit. The heat storage air conditioner C has a heat storage operation in which cold and hot heat generated by circulating the refrigerant in the refrigerant circuit is stored in the heat storage tank 32, and a circulation pump (not shown) provided in the heat medium circuit. A heat storage utilization operation for cooling the building 40 is performed by circulating the heat medium and leading it indoors. Hereinafter, when the air conditioner A, the air conditioner B, and the heat storage air conditioner C are not distinguished, they are simply referred to as air conditioners.

This air conditioning system is a system that operates according to an operation plan prepared in advance. The operation plan is that during the daytime when power consumption peaks, the heat storage air conditioner C performs heat storage utilization operation for air conditioning, and during the other time periods, the refrigerant air conditioner A or the refrigerant air conditioner B operates. It is created to be air-conditioned. Also, which air conditioner is operated at which timing is determined in consideration of the load on the building 40, the operating efficiency of each air conditioner, the outside air temperature, and the like. The details of the operation plan will be explained later.

Although not shown, the air conditioner A, the air conditioner B, and the heat storage air conditioner C are provided with a plurality of sensors such as a temperature sensor, a humidity sensor, and a flow rate sensor. It is designed to be input to the control device 1 .

The control device 1 creates an operation plan for the air conditioning system and controls the air conditioning system based on the operation plan.

FIG. 2 is a diagram illustrating a functional configuration of the control device for the air conditioning system according to the embodiment.
The control device 1 includes an information acquisition section 2 , a load prediction section 3 , an operation plan creation section 4 , a failure detection section 5 , a repair time prediction section 6 and a control command instruction section 7 .

The information acquisition unit 2 acquires weather forecast data, load data, failure data, power data, sensor data, and the like. The weather forecast data is data including at least the outdoor temperature, for example, hourly forecast data of the outdoor temperature. The load data is set temperature or the like necessary for the load prediction unit to predict the load. The failure data is information specifying the air conditioner that is currently out of order and the content of the failure. The power data is the past power consumption of each air conditioner. Sensor data are, for example, temperature, humidity, amount of refrigerant, pressure, water flow rate, and the like. The information acquisition unit 2 may further acquire GPS or traffic information.

The load prediction unit 3 predicts the load of the building 40 in the future period based on past actual load results, load data, and weather forecast data. The load is the amount of heat required to bring the indoor temperature to the set temperature. Specifically, for example, the load prediction unit 3 predicts the hourly load for the next day. The "future period" can be freely set, and the following description will be given assuming that the load for the next day is predicted. Note that the method of predicting the load in the load prediction unit 3 is not particularly limited in this embodiment, and any method may be used for prediction.

The operation plan creation unit 4 creates an operation plan for the air conditioning system. The operation plan is start/stop information such as which air conditioner is to be operated from what time to what time. The operation plan creation unit 4 creates an operation plan for the next day based on the load and weather forecast data for the next day predicted by the load prediction unit 3 so that the power consumption of the air conditioning system is reduced.

When the operation plan creation unit 4 receives restoration time information from the restoration time prediction unit 6 described later during execution of the operation plan, it re-plans the operation plan. The policy for creating the operation plan and the re-planning in the operation plan creating section 4 will be explained again.

The failure detection unit 5 detects failures of the refrigerant air conditioners A and B. FIG. The failure detection unit 5 may detect a failure based on sensor data acquired from the refrigerant air conditioner A and the refrigerant air conditioner B, or may detect a failure signal output from each of the refrigerant air conditioner A and the refrigerant air conditioner B. You may make it detect a failure by inputting. Upon detecting a failure, the failure detection unit 5 transmits failure information including details of the failure to the repair time prediction unit 6 .

Upon receiving the failure information, the repair time predicting unit 6 predicts the repair time required for repairing the failure according to the details of the failure. A repair time prediction unit 6 predicts a repair time based on a pre-stored failure database.

FIG. 3 is a diagram illustrating an example of a failure database according to the embodiment;
FIG. 3 shows an example of a database in which past failure response data are registered together with dates, but the failure database only needs to register at least the details of the failure and the repair time corresponding to the details of the failure. .

Failures include, for example, communication anomalies, sound anomalies, sensor anomalies, performance anomalies, water leaks, outdoor unit anomalies, circulation pump anomalies, vibration anomalies, electrical and electronic anomalies, and coolant leakage. In the failure database of FIG. 3, these failure details, failure countermeasures corresponding to the failure details, and repair times are stored in association with each other. A default failure database may be prepared at the start of operation, and updated in accordance with the actual repair time each time a failure occurs.

For troubleshooting, there are "automatic repair" that automatically repairs by restarting the failed machine, "remote operation" that repairs by operating from a remote location, and "on-site repair" that repairs by workers visiting the site. There is "maintenance".

“Feedback information” in FIG. 3 indicates that the repair time is predicted based on the feedback information from the worker. In other words, if there is an abnormality in refrigerant leakage, on-site maintenance work by a worker is required. Therefore, the repair time is the sum of the time required for the worker to rush to the site and the work time for the worker to perform the work at the site. When the repair time is "feedback information", the repair time prediction unit 6 notifies the contents of the abnormality to the mobile terminal of the worker by e-mail or the like. When receiving a reply from the worker who confirmed the notification of the time required to rush to the site plus the work time, the time is set as the repair time. The work time may be determined not by the worker but by the repair time prediction unit 6, and only the time required for the worker to arrive at the site may be fed back.

Repair by remote maintenance is not limited to a remote operator, and may be handled by local personnel such as a plant manager or a security guard at the installation site after ensuring safety. When local staff responds, the failure response procedure may be displayed, for example, as an image on the operation screen of a display device (not shown) provided in the air conditioning system. If local personnel can handle failures, it is possible to shorten the repair time compared to doing it from a remote location. When the on-site staff responds to the failure in this manner, the content of the response should be recorded in the failure database together with the repair time.

The control command instruction unit 7 issues control commands to each of the refrigerant air conditioner A, the refrigerant air conditioner B, and the heat storage air conditioner C so that they are operated according to the operation plan created by the operation plan creation unit 4 .

FIG. 4 is a diagram showing the hardware configuration of the control device of the air conditioning system according to the embodiment.
The control device 1 includes a CPU 8, a memory 9a, and a communication device 9b. An information acquisition unit 2, a load prediction unit 3, an operation plan creation unit 4, a failure detection unit 5, a repair time prediction unit 6, and a control command instruction unit 7 are operated by the CPU 8 and programs stored in the memory 9a. and are functionally configured.

FIG. 5 is a flow chart showing the flow of failure handling operation control in the control device for the air conditioning system according to the embodiment. Here, an example will be described in which an operation plan for the next day of the air conditioning system in a certain building 40 is drawn up the day before, and a failure occurs in the refrigerant air conditioner A during operation according to the operation plan.

The load prediction unit 3 predicts the load for the next day at a preset time (step S1). The operation planning unit creates an operation plan for the air conditioning system based on the predicted load and weather forecast data (step S2). When a failure occurs in the refrigerant air conditioner A during operation according to the operation plan (step S3), the repair time prediction unit 6 predicts the time required for repair (step S4). That is, when a failure occurs, the failure detection unit 5 transmits failure information including details of the failure to the repair time prediction unit 6, and the repair time prediction unit 6 receives the failure information and predicts the repair time. The operation plan creating unit 4 re-plans the operation plan based on the repair time (step S5).

In step S5, the operation plan creation unit 4, based on the repair time, determines that the malfunctioning equipment will be restored by the scheduled time scheduled to start operation in the operation plan, and if it is determined that the equipment can be operated at the scheduled time, the failure will occur at the scheduled time. Re-plan the operation plan under the conditions to operate the machine. On the other hand, based on the recovery time, the operation plan creation unit 4 re-plans the operation plan under the condition that the failed unit is not operated at the scheduled time if the failed unit cannot be restored by the scheduled time when it starts operating according to the operation plan. do.

Then, the control command instructing unit 7 transmits a control command based on the operation plan to each air conditioner so that the operation plan created by the operation plan creating unit 4 is performed (step S6).

Next, the operation plan creation policy in the operation plan creation unit 4 will be described.

The operation plan creation unit 4 operates the heat storage air conditioner during the time period when the power consumption peaks in the daytime, specifically, for example, during the time period when the outside air temperature is equal to or higher than a preset heat storage utilization start temperature (for example, 35 ° C.). At C, create an operation plan for the heat storage utilization operation. The operation plan for the heat storage utilization operation of the heat storage air conditioner C is created based on the policy of the capacity of the heat storage tank 32, improvement of the night shift rate, peak cut, and cold/hot water stable heat storage.

The operation plan creation unit 4 sets the heat storage operation of the refrigerant air conditioner A, the refrigerant air conditioner B, and the heat storage air conditioner C so that each of them is operated at high efficiency in the time period when the outside air temperature is less than the heat storage utilization start temperature. Create an operation plan. A specific description will be given below.

FIG. 6 is a diagram showing outside air temperature-COP characteristics of each air conditioner in the air conditioning system according to the embodiment. In FIG. 6, "A air conditioning" indicates the outside air temperature-COP characteristic of the refrigerant air conditioner A. In FIG. "B air conditioning" indicates the outside air temperature-COP characteristics of the refrigerant air conditioner B; “C air conditioning” indicates the outside air temperature-COP characteristic of the heat storage air conditioner C. FIG. This illustration method is the same in the drawings after FIG. 6 .

Each air conditioner of the air conditioning system of the present embodiment has different outside air temperature-COP characteristics as shown in FIG. The operation plan creation unit 4 has high efficiency operation conditions under which each air conditioner is operated within an outside temperature range including the outside temperature at which the COP of each air conditioner is maximized. The operation plan creation unit 4 creates an operation plan for the heat storage operation of the refrigerant air conditioner A, the refrigerant air conditioner B, and the heat storage air conditioner C optimized to satisfy the high efficiency operation conditions. COP is the coefficient of performance, which is the cooling capacity divided by the power consumption.

In the example of FIG. 6, the refrigerant air conditioner A has a characteristic that the COP is maximum when the outside air temperature is 28° C., and the operation period of the refrigerant air conditioner A is the outside temperature range of 20° C. to 29° C. . Refrigerant air conditioner B has a characteristic that the COP is maximized when the outside temperature is 30°C. In addition, the heat storage air conditioner C has a characteristic that the COP is maximized when the outside air temperature is 12°C. The heat storage air conditioner C stores cold in the heat storage tank 32 by performing the heat storage operation in the early morning hours when the outside air temperature is low. In heat storage operation, by using nighttime power in the early morning hours and the highly efficient outside air environment of the refrigeration cycle, it is possible to build an environment-friendly system that generates less _CO2 .

FIG. 7 is a diagram showing a building load predicted in the air conditioning system according to the embodiment together with an operation plan. In FIG. 7, the horizontal axis is time and the vertical axis is load [kWh]. FIG. 7 also shows the outside air temperature at each hour based on the weather forecast data.
In the example of FIG. 7, the load is predicted to start at 8:00, reach a peak between 12:00 and 15:00, and then decrease until 20:00. Changes in the load generally correspond to changes in the outside temperature, and the load increases as the outside temperature rises. In other words, when the outside air temperature rises, the cooling load tends to increase.

In this example, the outside temperature is predicted to exceed 35° C. between 12:00 and 15:00 based on weather forecast data. Therefore, from 12:00 to 15:00, it is planned to operate the heat storage air conditioner C in the heat storage utilization operation for air conditioning. At 6 o'clock, the outside air temperature is 12° C., which is an operation period during which the heat storage air conditioner C can be operated with high efficiency. Therefore, it is planned to start the heat storage operation of the heat storage air conditioner C at 6:00. The end time of the heat storage operation of the heat storage air conditioner C is determined as follows. The heat storage operation of the heat storage air conditioner C is planned so that the heat storage tank 32 stores a heat storage amount C1 corresponding to the total load from 12:00 to 15:00. Since the required operation time is determined from the heat storage amount C1 and the capacity of the heat storage air conditioner C, the end time of the heat storage operation is determined.

From 8:00 to 12:00 and from 15:00 to 20:00, refrigerant air conditioner A or refrigerant air conditioner is operated based on the outside air temperature-COP characteristics of each air conditioner shown in FIG. 6 and the outside air temperature based on weather forecast data. It is planned to select and operate one of machine B that can be operated with high efficiency. In this example, the outside air temperature is 20° C. to 29° C. from 8:00 to 10:00, and the outside temperature is 29° C. to 35° C. from 10:00 to 12:00. Therefore, it is planned that the refrigerant air conditioner A operates from 8:00 to 10:00 and the refrigerant air conditioner B operates from 10:00 to 12:00. After 15:00, an operation plan is created based on the same concept, and the refrigerant air conditioner B is to be operated from 15:00 to 18:00, and the refrigerant air conditioner A is to be operated from 18:00 to 20:00.

Next, replanning of the operation plan when a failure occurs will be described. Here, an example will be described in which the refrigerant air conditioner A fails immediately after the refrigerant air conditioner A starts operating at 8 o'clock in the operation plan shown in FIG. 7 .

The operation plan creating unit 4 first re-plans which air conditioner is to be operated at each time based on the prediction result of the repair time. That is, when the restoration time is predicted to be five hours, for example, it is decided to operate refrigerant air conditioner B instead of refrigerant air conditioner A, which was scheduled to operate from 8:00 to 10:00. In addition, since the refrigerant air conditioner A, which is the malfunctioning machine, can be restored by 18:00, which is the scheduled start time, it is decided to operate the refrigerant air conditioner A at 18:00. On the other hand, if the restoration time is predicted to be 12 hours, for example, refrigerant air conditioner A cannot be restored by 18:00, which is the next scheduled time. Decide to drive from 12:00 to 20:00.

It should be noted that recovery from failure is possible by automatic recovery such as restarting, and if the recovery time is predicted to be 5 minutes, for example, the system is operated according to the initial operation plan. In other words, if the failure can be repaired within a preset set time (for example, 10 minutes), the system will operate according to the initial operation plan even if a failure occurs.

FIG. 8 is a diagram showing an operation plan after re-planning based on the operation plan of FIG. 7, showing an example in which the refrigerant air conditioner A is not restored by 18:00. FIG. 9 is a diagram corresponding to FIGS. 7 and 8, and is an explanatory diagram of changes in the operating periods of the refrigerant air conditioner B and the heat storage air conditioner C, respectively. FIG. 9 shows the outside air temperature-COP characteristics of the refrigerant air conditioner B and the heat storage air conditioner C, respectively. In FIG. 9, B-1 is the operation period of the refrigerant air conditioner B in the initial operation plan. B-2 is the operating period of the refrigerant air conditioner B after re-planning. C-1 is the operation period of the heat storage operation of the heat storage air conditioner C in the initial operation plan. C-2 is the operation period of the heat storage operation of the heat storage air conditioner C after re-planning. This illustration method is the same for the figures after FIG. 9 . FIG. 10 is a diagram showing an operation plan after re-planning based on the operation plan of FIG. 7, showing an example in which the refrigerant air conditioner A is restored by 18:00. FIG. 11 is a diagram corresponding to FIG. 10 and showing changes in the operation period of each air conditioner.

The initial operation plan was to operate each air conditioner within the outside air temperature range in which it can be operated with high efficiency. However, due to the failure of the refrigerant air conditioner A, the refrigerant air conditioner B needs to be operated at an outside air temperature outside the outside air temperature range in which the refrigerant air conditioner B can operate with high efficiency, so the operating efficiency of the refrigerant air conditioner B is lowered.

Therefore, in the re-planning, an operation plan is created with a policy of suppressing the deterioration of the operation efficiency of the refrigerant air conditioner B. Specifically, the upper limit temperature of the outside air temperature range corresponding to the refrigerant air conditioner B is corrected to the temperature side at which the COP is maximized. Then, the refrigerant air conditioner B is rescheduled so that the refrigerant air conditioner B is operated in the outside air temperature range having the corrected upper limit temperature, and the corrected upper limit temperature and the load predicted by the load prediction unit 3 , re-planning of the heat storage operation and the heat storage utilization operation of the heat storage air conditioner C is performed.

In this example, the upper limit temperature of the outside air temperature range corresponding to the refrigerant air conditioner B is corrected from 35°C to 32°C. With this correction, the refrigerant air conditioner B is planned to start operating at 8:00 in place of the malfunctioning machine and then operate until 11:00 when the outside air temperature reaches 32°C. If the refrigerant air conditioner A is not restored by 18:00, as shown in FIG. In addition to 18:00 when the air conditioner B is scheduled to stop operating, it is planned to operate until 20:00 in place of the malfunctioning machine. On the other hand, when the refrigerant air conditioner A is restored by 18:00, as shown in FIG. From 18:00 to 20:00, the refrigerant air conditioner A, which has been restored from the failure, is planned to operate.

Then, with the correction of the upper limit temperature of the outside air temperature range corresponding to the refrigerant air conditioner B from 35 ° C to 32 ° C, from 11:00 to 16:00 when the outside temperature is 32 ° C or higher, the heat storage air conditioner C Plan to do the driving.

Here, with the correction of the upper limit temperature of the outside air temperature range corresponding to refrigerant air conditioner B from 35° C. to 32° C., refrigerant air conditioner B is operated between 11:00 and 12:00 , will not drive. The load during the period when the refrigerant air conditioner B does not operate is handled by the heat storage use operation of the heat storage air conditioner C. Therefore, the operation plan creation unit 4 calculates the corrected heat amount C2, which is the heat storage amount corresponding to the total load from 11:00 to 12:00 and from 15:00 to 16:00, and uses the corrected heat amount C2 as the initial operation plan. The heat storage operation of the heat storage air conditioner C is rescheduled so that more heat is stored in the heat storage tank 32 than the time. As a result of this re-planning, in this example, the operation time of the heat storage operation of the heat storage air conditioner C is extended from 8:00 to 10:00.

Here, when considering the operation efficiency, the operating time of the refrigerant air conditioner B is shortened due to the correction of the upper limit temperature of the outside air temperature range corresponding to the refrigerant air conditioner B from 35 ° C. to 32 ° C. It's becoming Specifically, in the operation plan after re-planning, the operation of the refrigerant air conditioner B is stopped during peak load times, such as 11:00 to 12:00 and 15:00 to 16:00. That is, since the operation time of the refrigerant air conditioner B is shortened in the outside air temperature range where the operation efficiency is low, it is possible to reduce the power consumption even if a failure occurs.

By the way, from the viewpoint of peak shaving to suppress peaks in electric power demand, there may be a capacity condition for operating the refrigerant air conditioner with its capacity limited to a preset upper limit capacity value. The operation plan when there are capacity conditions will be described below.

FIG. 12 is an explanatory diagram of replanning of the operation plan in the control device for the air conditioning system according to the embodiment, and is a diagram showing an example in which there is a capacity condition.
In this example, the upper limit capacity value MAX of the refrigerant air conditioner B is limited to, for example, 10 kWh. The policy for creating an operation plan with capacity conditions is basically the same as the above-described case without capacity conditions, and the points different from those without capacity conditions will be mainly explained below.

The operation plan creating unit creates an operation plan so as to satisfy the capacity conditions. That is, since the refrigerant air conditioner B is limited in capacity, the refrigerant air conditioner B operates from 8:00 to 12:00, and the load portion exceeding the upper limit capacity value MAX of the refrigerant air conditioner B is the heat storage air conditioner. I am trying to process it with the heat storage utilization operation of C. That is, between 10:00 and 12:00 and between 15:00 and 17:00, both the refrigerant air conditioner B and the heat storage air conditioner C operate.

The operation plan for the heat storage operation of the heat storage air conditioner C is the load from 10:00 to 12:00 that exceeds the upper limit capacity value MAX, the load from 12:00 to 15:00, and the load from 15:00 to 17:00. It is planned to store in the heat storage tank 32 a heat storage amount corresponding to the total load of the load exceeding the upper limit capacity value MAX.

FIG. 13 is a diagram showing an operation plan after re-planning based on the operation plan of FIG. 12, showing an example in which the refrigerant air conditioner A is not restored by 18:00. FIG. 14 is a diagram showing an operation plan after re-planning based on the operation plan of FIG. 12, showing an example in which the refrigerant air conditioner A is restored by 18:00. The outside air temperature range corresponding to each air conditioner when there is a capacity condition is the same as in FIGS. 9 and 11. FIG.
As in the case without the above capacity conditions, the operation plan after re-planning is an operation plan that can reduce the operating time of the refrigerant air conditioner B during the time period when the load peaks and reduce the power consumption. It's becoming

As described above, the control device 1 of the air conditioning system of the present embodiment includes the plurality of refrigerant air conditioners A and B that perform air conditioning by circulating the refrigerant, and the cold heat generated by circulating the refrigerant to the heat storage tank 32. A control device 1 for an air conditioning system that air-conditions the inside of a building 40, having a heat storage air conditioner C that performs a heat storage operation that stores heat and a heat storage use operation that performs air conditioning using the cold heat of a heat storage tank 32. The control device 1 of the air conditioning system includes an information acquisition unit 2 that acquires weather forecast data, a load prediction unit 3 that predicts the load of the building 40 in the future period, and the load predicted by the load prediction unit 3 and the weather forecast data. and an operation plan creating unit 4 for creating an operation plan so as to reduce the power consumption of the air conditioning system based on the above. The control device 1 for the air-conditioning system includes a control command instruction unit 7 for controlling the operation of the air-conditioning system according to the operation plan, a failure detection unit 5 for detecting failures in each of the plurality of refrigerant air conditioners A and B, and a failure detection A repair time prediction unit 6 for predicting a repair time required for repairing a malfunctioning machine in which a failure has occurred when a failure is detected by the unit 5 . The operation plan creation unit 4 re-plans the operation plan based on the repair time when a failure is detected.

In this way, the repair time required to repair the failed unit is predicted, and the operation plan is rescheduled based on the predicted result, so power consumption can be reduced even if a refrigerant air conditioner fails. can be done.

In the first embodiment, if the operation plan creation unit 4 determines that the malfunctioning machine will be restored by the scheduled time scheduled to start operation in the operation plan based on the repair time and can be operated at the scheduled time, the scheduled time The operation plan is rescheduled under the condition that the faulty machine is to be operated.

In this way, when it is determined that the malfunctioning machine can be operated at the scheduled time, an operation plan can be created under the condition that the malfunctioning machine will be operated at the scheduled time.

In the first embodiment, the operation plan creation unit 4 operates under the condition that the failed equipment is not operated at the scheduled time based on the repair time when the failed equipment cannot be restored by the scheduled time when the operation of the failed equipment starts according to the operation plan. Re-plan your plan.

In this way, when it is determined that the malfunctioning machine cannot be operated at the scheduled time, an operation plan can be created under the condition that the malfunctioning machine will be operated at the scheduled time.

In Embodiment 1, each of the plurality of refrigerant air conditioners A and B and the heat storage operation of the heat storage air conditioner C has different outside air temperature-COP characteristics. The operation plan creation unit 4 sets the heat storage operation of each of the plurality of refrigerant air conditioners A and B and the heat storage air conditioner C under the condition of operating in an outside temperature range including the outside temperature at which the own COP is maximum. Has efficient operating conditions. The operation plan creation unit 4 causes the heat storage air conditioner C to perform the heat storage use operation in the time zone when the outside air temperature included in the weather forecast data is equal to or higher than the preset heat storage use start temperature, and the outside air temperature is less than the heat storage use start temperature. During this period, an operation plan is created so as to satisfy high-efficiency operation conditions.

In this way, the operation plan creating unit 4 creates an operation plan that satisfies the high-efficiency operation conditions, so that optimum operation with reduced power consumption can be performed.

When re-planning, the operation plan creation unit 4 of the present embodiment corrects the upper limit temperature of the outside air temperature range corresponding to the refrigerant air conditioners other than the malfunctioning unit to the temperature side at which the COP is maximized. , the refrigerant air conditioner is rescheduled so that the refrigerant air conditioner is operated within the corrected outside air temperature range. Further, the operation plan creation unit 4 reschedules the heat storage operation and the heat storage utilization operation based on the corrected upper limit temperature and the load predicted by the load prediction unit 3 .

In this way, when a failure occurs, the upper limit temperature of the outside air temperature range corresponding to the refrigerant air conditioners other than the failed air conditioner is corrected to the temperature side at which the COP is maximized. As for time, the operating time is shorter in the time period when the load peaks. Therefore, even in re-planning when a failure occurs, it is possible to create an operation plan designed to reduce power consumption.

The operation plan creation unit 4 of the present embodiment calculates the corrected heat amount of the heat storage amount of the heat storage tank 32 based on the corrected upper limit temperature and the load predicted by the load prediction unit 3, The heat storage operation is rescheduled so that heat is stored in

As a result, it is possible to create an operation plan in which the amount of heat that is insufficiently processed due to shortening the operation time of the refrigerant air conditioner during the peak load time period is covered by the corrected amount of heat.

When there is a capacity condition for operating the plurality of refrigerant air conditioners A and B by limiting their capacity to a preset upper limit capacity value, the operation plan creating unit 4 of the present embodiment satisfies the capacity condition. to create an operation plan.

In this way, it is possible to create and reschedule an operation plan even when there are capacity conditions.

The repair time prediction unit 6 of the present embodiment predicts the repair time by referring to a failure database in which failure contents and repair times corresponding to the failure contents are stored in association with each other.

Thus, the repair time prediction unit 6 can predict the repair time by referring to the failure database.

It should be noted that the specific numerical values of each temperature, time, etc. in the above-described embodiment are only examples, and they may be appropriately set according to the actual use conditions and the like.

1 control device, 2 information acquisition unit, 3 load prediction unit, 4 operation plan creation unit, 5 failure detection unit, 6 restoration time prediction unit, 7 control command instruction unit, 8 CPU, 9a memory, 9b communication device, 10 outdoor unit , 11 indoor unit, 20 outdoor unit, 21 indoor unit, 30 outdoor unit, 31 indoor unit, 32 heat storage tank, 40 building, A refrigerant air conditioner, B refrigerant air conditioner, C thermal storage air conditioner.

Claims (10)

A plurality of refrigerant air conditioners that perform air conditioning by circulating a refrigerant, a heat storage operation that stores cold heat generated by circulating the refrigerant in a heat storage tank, and a heat storage use operation that performs air conditioning using the cold heat in the heat storage tank. A control device for an air-conditioning system for air-conditioning a building, comprising:
an information acquisition unit that acquires weather forecast data;
a load prediction unit that predicts the load in the future period of the building;
an operation plan creation unit that creates an operation plan so as to reduce power consumption of the air conditioning system based on the load predicted by the load prediction unit and the weather forecast data;
a control command instruction unit that controls the operation of the air conditioning system according to the operation plan;
a failure detection unit that detects a failure of each of the plurality of refrigerant air conditioners;
a repair time prediction unit that predicts a repair time required to repair the failed machine in the event that a failure is detected by the failure detection unit;
The control device for an air-conditioning system, wherein the operation plan creating unit re-plans the operation plan based on the repair time when a failure is detected. If the operation plan creation unit determines that the malfunctioning machine will be restored by the scheduled time scheduled to start operation according to the operation plan based on the repair time and can be operated at the scheduled time, 2. The control device for an air conditioning system according to claim 1, wherein the operation plan is rescheduled under the conditions for operating the malfunctioning machine. Based on the recovery time, the operation plan creation unit creates an operation plan under the condition that the failed unit is not operated at the scheduled time if the failed unit cannot be restored by the scheduled time when the operation of the failed unit starts according to the operation plan. 3. A control device for an air conditioning system according to claim 1 or claim 2, wherein the replanning is performed. Each of the plurality of refrigerant air conditioners and the heat storage operation of the heat storage air conditioner has an outside air temperature-COP characteristic different from each other,
The operation plan creation unit,
A highly efficient operation condition on the condition that each of the heat storage operations of the plurality of refrigerant air conditioners and the heat storage air conditioner is operated in an outside temperature range including an outside temperature that maximizes its own COP,
When the outside air temperature contained in the weather forecast data is equal to or higher than a preset heat storage utilization start temperature, the heat storage air conditioner is caused to perform the heat storage utilization operation, and the outside air temperature is less than the heat storage utilization start temperature. The controller for an air conditioning system according to any one of claims 1 to 3, wherein an operation plan is created so as to satisfy the high-efficiency operation conditions. At the time of re-planning, the operation plan creation unit corrects the upper limit temperature of the outside air temperature range corresponding to the refrigerant air conditioners other than the malfunctioning unit to the temperature side at which the COP is maximized. Then, the refrigerant air conditioner is rescheduled so that the refrigerant air conditioner is operated in the corrected outside air temperature range, and the corrected upper limit temperature and the load predicted by the load prediction unit 5. The control device for an air conditioning system according to claim 4, wherein the re-planning of the heat storage operation and the heat storage utilization operation is performed based on. The operation plan creation unit calculates a corrected heat amount of the heat storage amount of the heat storage tank based on the corrected upper limit temperature and the load predicted by the load prediction unit, and stores the corrected heat amount in the heat storage tank. 6. The control device for an air conditioning system according to claim 5, wherein the replanning of the heat storage operation is performed. When there is a capacity condition for operating the plurality of refrigerant air conditioners with capacity limited to a preset upper limit capacity value, the operation plan creation unit creates an operation plan so as to satisfy the capacity condition. A control device for an air conditioning system according to any one of claims 1 to 6. 8. The repair time prediction unit according to any one of claims 1 to 7, wherein the repair time prediction unit predicts the repair time by referring to a failure database in which failure contents and the repair times corresponding to the failure contents are stored in association with each other. Control device for the air conditioning system according to 1. A plurality of refrigerant air conditioners that perform air conditioning by circulating a refrigerant, a heat storage operation that stores cold heat generated by circulating the refrigerant in a heat storage tank, and a heat storage use operation that performs air conditioning using the cold heat in the heat storage tank. A control method for an air-conditioning system that air-conditions a building, comprising:
An operation plan is created so as to reduce the power consumption of the air conditioning system based on the load predicted to occur in the future period of the building and weather forecast data, and the operation of the air conditioning system is controlled according to the operation plan. and
A control method for an air-conditioning system, which, when a failure of the refrigerant air conditioner is detected, predicts a repair time required to repair the failed machine, and re-plans an operation plan based on the repair time. A plurality of refrigerant air conditioners that perform air conditioning by circulating a refrigerant, a heat storage operation that stores cold heat generated by circulating the refrigerant in a heat storage tank, and a heat storage use operation that performs air conditioning using the cold heat in the heat storage tank. and an air conditioning system for air conditioning a building,
having a controller,
The control device is
an information acquisition unit that acquires weather forecast data;
a load prediction unit that predicts the load in the future period of the building;
an operation plan creation unit that creates an operation plan so as to reduce power consumption of the air conditioning system based on the load predicted by the load prediction unit and the weather forecast data;
a control command instruction unit that controls the operation of the air conditioning system according to the operation plan;
a failure detection unit that detects a failure of each of the plurality of refrigerant air conditioners;
a repair time prediction unit that predicts a repair time required to repair the failed machine in the event that a failure is detected by the failure detection unit;
The air conditioning system, wherein the operation plan creation unit re-plans the operation plan based on the repair time when a failure is detected.

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