JP6448463B2 - Water heater operation control device and program - Google Patents

Description

  The present invention relates to a hot water heater operation control device and program, and in particular, a hot water heater that uses a second hot water heater that has a higher running cost than the first hot water heater and the first hot water heater and that has a hot water discharge capacity than the first hot water heater. The present invention relates to operation control of a water heater in a system.

  Conventionally, there are hot water supply systems that use hot water heaters of other heat sources such as a heat pump type and a combustion type. Although the heat pump type hot water heater is less in hot water discharge capacity than the combustion type hot water heater, the energy consumption efficiency is high, so the running cost can be suppressed.

  By the way, the conventional hot water supply system automatically starts making hot water when the amount of remaining hot water in the hot water storage tank falls below a predetermined amount. In the combined hot water supply system described above, a sensor that outputs a start signal with a different amount of remaining hot water is associated with each of the heat pump hot water heater and the combustion hot water heater. When the amount of remaining hot water in the hot water tank decreases, the heat pump water heater with low running cost starts operation first. And if hot water is consumed more than the tapping capacity of the heat pump type hot water heater and the remaining hot water amount is further reduced, the operation of the combustion type hot water heater having a high tapping capacity is started. And if the amount of hot water increases and the sensor which detects the full tank provided in the hot water storage tank outputs a stop signal, a heat pump type water heater and a combustion type water heater will stop operation.

JP 2010-108345 A JP 2006-268102 A JP 2007-270659 A

  By the way, the time zone in which a lot of hot water is consumed is determined to some extent from the usage form, business form, etc. of the facility using the hot water supply system. For example, in a business hotel, hot water is intensively used in the morning and evening hours. Therefore, for example, when a large amount of hot water is consumed in the morning by a guest of a business hotel, the combustion water heater starts operation. And hot water is made until the hot water tank is full. However, hot water that fills the hot water tank is not used much in the daytime and is used at night.

  As described above, conventionally, when the amount of remaining hot water decreases, the hot water heater is operated and controlled so as to make hot water until the tank is full without considering the time zone in which the hot water is used.

  Of course, the hot water stored in the hot water tank will eventually be used, but if the time until the hot water is used is long, a loss due to heat dissipation occurs. For this reason, it is necessary to operate the water heater for heating the hot water in the hot water storage tank, and this may cause an extra running cost.

  An object of this invention is to operate each 1st and 2nd water heater considering the time zone when hot water is used in large quantities.

The hot water heater operation control device according to the present invention has a first hot water supplier that supplies hot water to a facility and a second hot water heater that has higher running cost than the first hot water heater, but has a hot water discharge capacity than the first hot water heater. In the hot water heater operation control device that operates the water heater, from the actual hot water usage amount data in the facility, a large amount of time zone in which the hot water usage amount per unit time is larger than the maximum hot water discharge amount per unit time of the first water heater In the case where the hot water is made only with the first hot water heater, the mass use time zone identifying means for identifying the time zone, the target hot water volume calculating means for calculating the hot water usage amount in the mass usage time zone as the target hot water storage amount, An estimated hot water storage amount calculating means for calculating an initial hot water storage amount of the large usage time zone as an estimated hot water storage amount, and when the estimated hot water storage amount is lower than the target hot water storage amount, a difference between the estimated hot water storage amount and the target hot water storage amount An operation schedule creating means for creating an operation schedule so as to operate the second water heater in order to make hot water corresponding to an insufficient amount of hot water obtained from the operation, and an operation control means for controlling the operation of each water heater in accordance with the operation schedule It is characterized by having.

  The operation schedule creation means calculates the operation time of the second water heater from the shortage hot water storage amount and the hot water discharge capacity of the second water heater, and calculates the operation time calculated from the beginning of the mass use time zone. An operation schedule is created so that the operation of the second water heater is started at the time of going back.

  The first water heater is a heat pump type water heater, and the second water heater is a combustion type water heater.

The program according to the present invention operates a first water heater that supplies hot water to a facility and a second water heater that has higher running cost than the first water heater, but has a hot water discharge capacity than the first water heater. A mass usage time that specifies a time zone in which the amount of hot water used per unit time is larger than the maximum amount of hot water discharged per unit time of the first water heater as a mass usage time zone from the actual hot water usage data in the facility A zone specifying means, a target hot water storage amount calculating means for calculating the hot water usage amount in the mass usage time zone as a target hot water storage amount, and a hot water storage amount at the beginning of the mass usage time zone when hot water is made only with the first hot water heater An estimated hot water storage amount calculating means for calculating an estimated hot water storage amount; if the estimated hot water storage amount is less than the target hot water storage amount, an insufficient hot water storage amount obtained from a difference between the estimated hot water storage amount and the target hot water storage amount Operation schedule creating means for creating operation schedule so as to operate the second water heater to produce hot water, the operation control means for performing the operation control of the water heater in accordance with the operation schedule, to function as a.

  According to the present invention, since the first and second water heaters are operated in consideration of the time zone in which a large amount of hot water is used, the running cost of the water heater can be reduced.

  In addition, since a necessary amount of hot water is stored in the hot water storage tank in accordance with a time zone in which a large amount of hot water is used, loss due to heat dissipation of the hot water in the hot water storage tank can be prevented.

BRIEF DESCRIPTION OF THE DRAWINGS It is the figure which showed the block diagram of the whole structure of the hot-water supply system containing the controller for control which is one Embodiment of the hot water heater operation control apparatus which concerns on this invention, and the controller for control. It is a hardware block diagram of the controller for control in this Embodiment. It is the flowchart which showed the driving schedule creation process in this Embodiment. It is the figure which showed the hot water usage amount for every hour of the facility obtained from hot water usage result data in this Embodiment. It is the figure which showed the hot water usage amount for every hour of the facility obtained from the hot water usage amount actual data in this Embodiment with the graph.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a diagram showing an overall configuration of a hot water supply system including a controller for control, which is an embodiment of a hot water heater operation control device according to the present invention, and a block configuration of the controller for control. Note that components not used in the description in the present embodiment are omitted from the drawings. FIG. 1 shows a heat pump (HP) hot water heater 1, a combustion hot water heater 2, a hot water tank 3, and a controller 10 for control.

  The hot water supply system in the present embodiment uses the hot water heaters of other heat sources such as the heat pump hot water heater 1 and the combustion hot water heater 2 as described above. The heat pump type hot water heater 1 provided as the first hot water heater generally has a low hot water discharge capacity (heating capacity) as compared with the combustion type hot water heater 2 provided as the second hot water heater, but the energy consumption efficiency. Is expensive. Therefore, in the hot water supply system in the present embodiment, the heat pump hot water heater 1 is mainly operated (base operation), and the combustion hot water heater 2 is supplementarily used when the heat pump hot water heater 1 alone cannot cope with a large amount of hot water. Let it run. Hot water produced in each of the heat pump hot water heater 1 and the combustion hot water heater 2 is stored in the same hot water tank 3 and used in a facility where a hot water system is installed. The control controller 10 performs operation control of the heat pump hot water heater 1 and the combustion hot water heater 2.

  FIG. 2 is a hardware configuration diagram of a computer mounted on the control controller 10 in the present embodiment. The computer mounted on the control controller 10 in the present embodiment can be realized with a general-purpose hardware configuration that has existed in the past. That is, as shown in FIG. 2, the computer outputs a sensor output from the CPU 21, ROM 22, RAM 23, hard disk drive (HDD) 24, water heater interface (IF) 25 that connects the water heaters 1 and 2, and hot water tank 3. A sensor interface (IF) 26 that receives signals is connected to an internal bus 27.

  Returning to FIG. 1, the control controller 10 in the present embodiment includes a remaining hot water amount acquisition unit 11, an operation schedule creation processing unit 12, an operation control unit 13, a hot water usage result data storage unit 14, and an operation schedule storage unit 15. doing. The remaining hot water amount acquisition unit 11 acquires the remaining hot water amount of the hot water tank 3 by receiving an output signal from a sensor attached in the hot water tank 3. The sensor may be the same as before. Specifically, the ON sensor for starting the operation of the heat pump water heater 1, the ON sensor for starting the operation of the combustion water heater 2, and the hot water storage tank 3 are full. Therefore, an OFF sensor for stopping the operation of the heat pump water heater 1 and the combustion water heater 2 may be attached. However, even if the ON sensor detects that the amount of remaining hot water has decreased as will be described in detail later, it does not control to start the operation of the heat pump hot water heater 1 and the combustion hot water heater 2 as in the past. . The ON sensor is used for detecting the remaining hot water amount. The “full tank” in the present embodiment refers to a state where the hot water storage tank 3 is filled in a state where the hot water stored in the hot water storage tank 3 can be used (usually 60 ° C. or higher). Say. Strictly filling the hot water tank 3 means a state where hot water is stored up to the position of the OFF sensor.

  The operation schedule creation processing unit 12 is provided as mass use time zone specifying means, target hot water storage amount calculation means, estimated hot water storage amount calculation means, and operation schedule creation means. That is, the operation schedule creation processing unit 12 specifies a time zone in which the amount of hot water used per unit time is larger than the preset threshold value as the large usage time zone from the hot water usage amount actual data. In the present embodiment, the maximum amount of hot water discharged per unit time of the heat pump type hot water heater 1 is set as a preset threshold value. Then, the hot water usage amount in the large usage time zone is calculated as a target hot water storage amount, and the hot water storage amount at the beginning of the large usage time zone when hot water is made only by the heat pump hot water heater 1 is calculated as the estimated hot water storage amount. Then, when the estimated hot water storage amount is lower than the target hot water storage amount, an operation schedule is created so that the combustion type water heater 2 is operated in order to make hot water corresponding to the insufficient hot water storage amount obtained from the difference between the estimated hot water storage amount and the target hot water storage amount. . The operation control unit 13 controls the operation of the water heaters 1 and 2 according to the operation schedule created by the operation schedule creation processing unit 12.

  The hot water usage record data storage unit 14 stores hot water usage data in the facility from the transition of the remaining hot water volume in the hot water tank 3 or the like. The operation schedule storage unit 15 stores the operation schedule created by the operation schedule creation processing unit 12.

  Each component 11 to 13 in the control controller 10 is realized by a cooperative operation of a computer mounted on the control controller 10 and a program operating on the CPU 21 mounted on the computer. The storage units 14 and 15 are realized by the HDD 24 mounted on the control controller 10. Alternatively, the RAM 23 or an external storage means may be used via a network.

  Further, the program used in this embodiment can be provided not only by communication means but also by storing it in a computer-readable recording medium such as a CD-ROM or USB memory. The program provided from the communication means or the recording medium is installed in the computer, and various processes are realized by the CPU of the computer sequentially executing the program.

  The hot water supply system in the present embodiment is assumed to be installed in a facility such as a business hotel where the time zone in which hot water is consumed is fixed to some extent depending on the form of business. For example, in business hotels, hot water is concentrated and used in the morning and evening by guests. Of course, it is used during the daytime by cleaning or the like, but the amount used is relatively small compared to morning and evening. When it is detected by the output signal from the sensor that the amount of hot water in the hot water tank 3 has decreased, the operation control unit 13 starts operation of at least one of the heat pump hot water heater 1 or the combustion hot water heater 2. Although control is performed so as to make hot water, the operation control unit 13 in the present embodiment is characterized in that operation control of each of the water heaters 1 and 2 is performed according to the operation schedule created by the operation schedule creation processing unit 12.

Hereinafter, the basic process flow (basic concept) of the operation schedule creation process in the present embodiment will be described with reference to the flowchart shown in FIG. Before the operation schedule is created, the operation of the combustion type water heater 2 is stopped unless otherwise described, and only the heat pump type water heater 1 is operated. Maximum volume of the melt teemed per hour, heat-pump water heater 1 is 0.7 m ^3, combustion water heater 2 is set to 1.2 m ^3.

The operation schedule creation processing unit 12 analyzes the hot water usage result data accumulated in the hot water usage result data storage unit 14 to obtain a typical hot water usage state on a normal business day. Specifically, the amount of hot water used per hour is calculated with 1 hour as a unit time. The calculated result, that is, the amount of hot water used for each hour is shown in FIG. FIG. 5 is a graph showing the amount of hot water used shown in FIG. 4 in a graph format. The operation schedule creation processing unit 12 obtains the amount of hot water used per hour in this way, and specifies a large usage time zone (step 110). The “mass use time zone” is a time zone in which the amount of hot water used in one hour exceeds a preset threshold value, which is the maximum amount of hot water discharged (0.7 m ³ ) of the heat pump water heater 1 in this embodiment. That means. According to FIG. 5, 6-8 o'clock and 18-22 o'clock correspond to the mass use time zone. “6-8 o'clock” means 3 hours from 6 o'clock to 8 o'clock, that is, 6:00 to 8:59. Similarly, “18:00 to 22:00” means 5 hours from 18:00 to 22:00, that is, 18:00 to 22:59.

  Subsequently, the operation schedule creation processing unit 12 calculates the hot water usage amount in each large usage time zone as the target hot water storage amount (step 120). Further, the operation schedule creation processing unit 12 calculates the hot water storage amount in the small usage time period immediately before each large usage time zone as the estimated hot water storage amount (step 130). Here, the “small amount use time zone” means a time zone between the large use time zone and the large use time zone. According to the example shown in FIG. 5, the small usage time zone immediately before the large usage time zone from 6 to 8 o'clock is from 23:00 to 5 o'clock, and the small usage time zone immediately before the mass usage time zone from 18 to 22:00 is 9 o'clock. It is from 17:00 to 17:00.

First, paying attention to the large usage time zone from 6 to 8 o'clock, the hot water supply system operates only the heat pump water heater 1 in 7 hours in the small usage time zone (23:00 to 5 o'clock), so that the mass usage time is By 6:00, which is the beginning of the belt, 0.7 m ³ × 7 hours = 4.9 m ³ of hot water can be made and stored in the hot water tank 3. That is, the estimated amount of hot water storage is 4.9 m ³ . On the other hand, the amount of hot water used during the 6-8 o'clock period of mass use is 0.8 + 1.9 + 1.4 = 4.1 m ³ . That is, the target hot water storage amount is 4.1 m ³ .

Accordingly, since the estimated hot water storage amount is equal to or greater than the target hot water storage amount (N in Step 140), the operation schedule creation processing unit 12 operates only the heat pump hot water heater 1 until the target hot water storage amount is reached in the small usage period. Is registered in the operation schedule storage unit 15 (step 180). Incidentally, hot water of 4.1 m ³ is 4.1 / 0.7 = 5.86, i.e., it is possible to make the hot water of the target amount of hot water storage if caused to operate the heat pump water heater 1 to about 5 hours 52 minutes The operation of the heat pump water heater 1 may be started from 0: 8. The operation control unit 13 operates the heat pump hot water heater 1 according to the operation schedule registered in the operation schedule storage unit 15. Here, since it is not necessary to operate the combustion type water heater 2, it is not operated.

  As described above, the running cost is reduced. Whether or not the amount of hot water discharged from the heat pump hot water heater 1 has reached the target hot water storage amount can be grasped by operation control of the heat pump hot water heater 1 or an output signal from a sensor of the hot water tank 3.

Next, paying attention to the large-scale use time zone from 18:00 to 22:00, the hot-water supply system operates only the heat pump type water heater 1 in 9 hours in the small-scale use time zone (9:00 to 17:00), so that it can be used in large quantities. up to 18 hours 00 minutes is the beginning of the time period to make the hot water of 0.7m ³ × 9 hours = 6.3m ^3, it is possible to accumulate in the hot water storage tank 3. That is, the estimated hot water storage amount is 6.3 m ³ . On the other hand, the amount of hot water used in the large-scale use time zone from 18:00 to 22:00 is 0.8 + 1.3 + 2.0 + 2.0 + 1.8 = 7.9 m ³ . That is, the target hot water storage amount is 7.9 m ³ .

  Accordingly, since the estimated hot water storage amount is lower than the target hot water storage amount (Y in step 140), the operation schedule creation processing unit 12 uses the heat pump hot water heater 1 alone, so that there is insufficient hot water. Is determined to be necessary.

Here, the insufficient hot water storage amount is 7.9−6.3 = 1.8 m ³ , and the hot water discharge capacity of the combustion hot water heater 2 is 1.2 m ³ per hour. Therefore, the operation schedule creation processing unit 12 calculates the operation time of the combustion water heater 2 to compensate for the shortage of hot water storage amount as 1.8 / 1.2 = 1.5 hours (step 150). That is, it can be seen that the combustion type water heater 2 may be operated for 1.5 hours during 9 hours in a small amount of use time zone (9:00 to 17:00).

By the way, the amount of hot water of 6.3 m ³ only needs to be prepared by 18:00, which is the start of the large-scale use time zone. Therefore, the operation schedule creation processing unit 12 determines 16:30, which is the time point of the operation time (1.5 hours) of the combustion water heater 2 from 18:00, as the operation start time of the combustion water heater 2. (Step 160).

  As a result, the operation schedule creation processing unit 12 always operates the heat pump type hot water heater 1 during a small amount of use time period (9 o'clock to 17 o'clock) and operates the combustion type hot water heater 2 from 16:30 to 17:59. The operation schedule to be operated is created and registered in the operation schedule storage unit 15 (step 170). The operation control unit 13 operates the heat pump hot water heater 1 according to the operation schedule registered in the operation schedule storage unit 15.

  As described above, in this embodiment, when it is determined that the amount of hot water is insufficient in the operation of the heat pump type hot water heater 1, the combustion type water heater 2 is operated in order to compensate for the shortage of hot water. Make a hot water storage amount). And the loss by the thermal radiation of the hot water in the hot water storage tank 3 is prevented by determining the operation start time of the combustion type hot water heater 2 so as to make hot water of the target hot water storage amount at the start time of the mass use time zone. In other words, the running cost can be reduced by eliminating the operation of the water heater for compensating for the loss due to heat dissipation.

  The basic concept of the operation schedule creation processing in the present embodiment is as described above. That is, in this embodiment, the heat pump type hot water heater 1 is operated as a base. If the target hot water storage amount cannot be made by the operation of only the heat pump hot water heater 1, the combustion hot water heater 2 is operated to compensate for the shortage of hot water. In addition, the start time of the operation of the combustion hot water heater 2 is determined so that the target hot water storage amount is reached immediately before the start of the mass use time period.

  By the way, although hot water is actually used even during a small amount of use time, the above description did not consider use of hot water during a small amount of use. Further, no reference was made to the amount of remaining hot water in the hot water storage tank 3 and the hot water of the heat pump hot water heater 1 in a large usage time zone. Therefore, hereinafter, creation of an operation schedule in consideration of this point will be described.

In Step 140, first, paying attention to the large use time zone from 6 to 8 o'clock, the estimated hot water storage amount in the small use time zone (23:00 to 5 o'clock) is 4.9 m ³ as described above. On the other hand, the amount of hot water used during the 6-8 o'clock large-scale use time period was 4.1 m ^3, so the target hot water storage amount was 4.1 m ³ . However, since the hot water of 0.3 + 0.2 + 0.2 + 0.1 + 0.1 + 0.2 + 0.3 = 1.1 m ³ is actually used even in the small usage time zone, the target hot water storage amount is 5.5 m ³ in total. is there. As a result, 5.5-4.9 = 0.6 m ³ of hot water is insufficient.

By the way, 0.6 m ³ can be made by operating the heat pump type water heater 1 at (0.6 / 0.7) × 60 = about 52 minutes. Therefore, what is necessary is just to drive the heat pump type water heater 1 from 22:08 to 5:59. According to the above description, the combustion type water heater 2 is operated to make up for the shortage. However, if the heat pump type water heater 1 is operated even during a large usage time period, the combustion type water heater 2 is operated. There is no need to let them.

Next, paying attention to the large usage time zone from 18:00 to 22:00, the estimated hot water storage amount in the small usage time zone (9:00 to 17:00) is 6.3 m ³ as described above. On the other hand, the amount of hot water used in the large usage time zone from 18:00 to 22:00 is 7.9 m ^3, but actually 0.2 + 0.2 + 0.3 + 0.3 + 0.4 + 0.2 + 0.1 + 0.2 + 0. Since hot water of 3 = 2.2 m ³ is used, the target hot water storage amount is 7.9 + 2.2 = 10.1 m ³ in total. As a result, 10.1−6.3 = 3.8 m ³ of hot water is insufficient.

This 3.8 m ³ can be made by operating the heat pump type water heater 1 at (3.8 / 0.7) = about 5 hours and 26 minutes. Therefore, if the heat pump type water heater 1 is operated from 3:34 to 8:59, the calculation can compensate for the shortage. However, the hot water produced from the heat pump type water heater 1 between 3:34 and 5:59 is the amount used in the 6-8 o'clock heavy use time zone. In other words, hot water made in 3 hours from 6 to 8 o'clock (0.7 m ³ × 3 hours = 2.1 m ³ ) can be used for a large usage time zone from 18 to 22:00. Even if the heat pump type hot water heater 1 is operated, the hot water of 3.8−2.1 = 1.7 m ³ is insufficient. Therefore, it is necessary to operate the combustion type water heater 2.

  Therefore, the operation schedule creation processing unit 12 calculates the operation time of the combustion type water heater 2 for supplementing the deficient hot water storage amount as 1.7 / 1.2 = about 1 hour 25 minutes (step 150), and Then, 16:35, which goes back from 18:00 to about 1 hour and 25 minutes, is determined as the start time of the operation of the combustion type water heater 2 (step 160). As a result, the operation schedule creation processing unit 12 creates an operation schedule that always operates the heat pump water heater 1 and operates the combustion water heater 2 from 16:35 to 17:59.

By the way, it is not necessary to operate the heat pump type water heater 1 from 18:00 to 22:07 in the 6 to 8 o'clock heavy use time zone. In other words, heat pump water heater 1, during the 4 hours 7 minutes, it is possible to make hot water 4.1 hour × 0.7 m ³ = about 2.9 m ^3. Therefore, in the large usage time zone from 18:00 to 22:00, the combustion type water heater 2 is operated to make a shortage of 1.7 m ³ of hot water, but the heat pump type water heater 1 is moved forward. You may make it not operate the combustion type water heater 2 by making it make. Furthermore, since there is room to avoid making 2.9-1.7 = 1.2 m ³ hot water, 1.2 / 0.7 = about 1 hour 43 without operating the heat pump water heater 1 for 24 hours. The operation may be stopped for a minute.

As described above, the operation schedule creation processing unit 12 creates an operation schedule that takes into account the amount of hot water used in a small amount of usage time zone. However, in the above description, the amount of remaining hot water in the hot water storage tank 3 is not considered. If the hot water storage tank 3 has a remaining hot water amount of 1.7 m ³ or more, the combustion hot water heater 2 may not be operated.

  Basically, once the operation schedule is created as described above, the operation control of each of the water heaters 1 and 2 may be performed according to the created operation schedule. In the above description, the operation schedule was created based on a typical hot water usage pattern on a normal business day as an example, so if it is a normal business day, the operation schedule created as described above is used. The operation control of the water heaters 1 and 2 may be performed according to However, the operation schedule may be updated as appropriate by executing the operation schedule creation process described above based on newly acquired hot water usage record data.

  In addition, the increase or decrease in the number of guests, the customer base, the frequency of hot water usage, etc. vary depending on the time. Therefore, the driving schedule may be switched according to time rather than the same pattern throughout the year. In addition, it is preferable to separately prepare a pattern of an operation schedule that matches a specific date or the like for replacing hot water in a common bath.

  In the present embodiment, the maximum amount of hot water discharged from the heat pump type hot water heater 1 is used as a reference (threshold value) for specifying a large usage time zone. This is because it is suitable for determining whether or not the operation with only the heat pump hot water heater 1 is possible. However, other values may be set as threshold values depending on the operation.

  Moreover, in this Embodiment, the heat pump type water heater 1 as a 1st water heater, and the combustion type water heater 2 with a hot water discharge capability although a running cost is higher than the heat pump type water heater 1 as a 2nd water heater, respectively The case where it was used has been described as an example. However, it is not always necessary to use water heaters having different heat sources as the two water heaters, and the present invention can also be applied to a hot water system that uses hot water heaters of the same heat source of different models having different running costs and hot-water supply capacities. In this embodiment, two water heaters are used, but the present invention can also be applied to a hot water system that uses three or more water heaters in combination. In this case, the water heater (first water heater) with the lowest running cost is operated as a base, and if the amount of hot water is insufficient by itself, the water heater (second water heater) with the next lowest running cost is used. When the amount of hot water is insufficient, each water heater is operated so that the water heater (third water heater) with the next lowest running cost is used.

DESCRIPTION OF SYMBOLS 1 Heat pump type hot water heater, 2 Combustion type hot water heater, 3 Hot water storage tank, 10 Control controller, 11 Remaining hot water amount acquisition part, 12 Operation schedule preparation process part, 13 Operation control part, 14 Hot water usage result data storage part, 15 operation Schedule storage unit, 21 CPU, 22 ROM, 23 RAM, 24 hard disk drive (HDD), 25 water heater interface (I / F), 26 sensor interface (I / F), 27 internal bus.

Claims (4)

In a water heater operation control device that operates a first water heater that supplies hot water to a facility and a second water heater that has higher running capacity than the first water heater, although the running cost is higher than that of the first water heater,
Mass usage time zone specifying means for specifying, as a mass usage time zone, a time zone in which the hot water usage amount per unit time is larger than the maximum amount of hot water discharged per unit time of the first water heater from the actual hot water usage amount data in the facility When,
A target hot water storage amount calculating means for calculating a hot water usage amount in the mass use time zone as a target hot water storage amount;
Estimated hot water storage amount calculating means for calculating the hot water storage amount at the beginning of the mass usage time period when the hot water is made only with the first water heater as the estimated hot water storage amount;
When the estimated amount of stored hot water is lower than the target amount of stored hot water, an operation schedule for operating the second water heater to make hot water corresponding to an insufficient amount of stored hot water obtained from the difference between the estimated amount of stored hot water and the target amount of stored hot water. An operation schedule creation means for creating
Operation control means for controlling the operation of each water heater according to the operation schedule;
A water heater operation control device comprising:   The operation schedule creation means calculates the operation time of the second water heater from the insufficient hot water storage amount and the hot water discharge capacity of the second water heater, and the calculated operation time goes back from the beginning of the mass use time zone. The hot water heater operation control device according to claim 1, wherein an operation schedule is created so as to start the operation of the second water heater at a time point.   2. The water heater operation control device according to claim 1, wherein the first water heater is a heat pump type water heater, and the second water heater is a combustion type water heater. 3. A computer that operates a first water heater that supplies hot water to a facility and a second water heater that has higher running cost than the first water heater, although the running cost is higher than that of the first water heater.
Mass usage time zone specifying means for specifying, as a mass usage time zone, a time zone in which the hot water usage amount per unit time is larger than the maximum amount of hot water discharged per unit time of the first water heater from the actual hot water usage amount data in the facility ,
Target hot water storage amount calculating means for calculating the hot water usage amount in the large volume usage time period as the target hot water storage amount;
Estimated hot water storage amount calculating means for calculating, as an estimated hot water storage amount, an initial hot water storage amount in the mass use time period when hot water is made only with the first water heater,
When the estimated amount of stored hot water is lower than the target amount of stored hot water, an operation schedule for operating the second water heater to make hot water corresponding to an insufficient amount of stored hot water obtained from the difference between the estimated amount of stored hot water and the target amount of stored hot water. Driving schedule creation means to create
Operation control means for controlling the operation of each water heater according to the operation schedule;
Program to function as.

Images