JP6493010B2 - Operation time setting method for heat pump type hot water storage system - Google Patents

Description

  The present invention relates to a method for setting an operating time of a plurality of heat pump hot water storage devices installed in a building that is performing collective power reception.

  There is a heat pump hot water storage device as one of heat sources in a house or the like. In the heat pump hot water storage device, hot water is generated using electric power in the midnight time zone (for example, from 23:00 to 7:00), and the generated hot water is stored in a hot water storage tank (hot water storage tank). Then, the stored hot water is supplied from a hot water storage tank to a hot water supply facility or the like as needed during the day.

  In recent years, the collective power reception system has been increasingly adopted in apartment houses such as apartments. In the collective power receiving method, a developer or a management company makes a high-voltage power contract with an electric power company for the entire apartment house, and a resident of each house makes a low-voltage power contract with the developer or the management company. Adopting such a collective power reception system has the advantage of reducing the electricity bill.

  In the collective power receiving method, the electricity rate varies depending on the power receiving contract capacity (with high voltage power contract) with the power company. For this reason, suppressing the peak of power consumption, in other words, smoothing power consumption, is an important issue for further reduction of the electricity bill. As means for suppressing the peak of power consumption, for example, there is a hot water storage type hot water supply apparatus disclosed in Patent Document 1.

  In the hot water storage type hot water supply apparatus of Patent Document 1, a first operation mode and a second operation mode in which the start time and stop time of the boiling operation in the midnight time zone are set are set. Then, the determination unit determines whether the boiling operation is performed in the first operation mode or the second operation mode.

JP, 2014-137200, A

  According to the configuration of Patent Document 1, it is considered that the peak of power consumption in the midnight time zone is alleviated by dividing the operation time of the hot water storage type hot water supply device into two patterns. However, with the configuration of Patent Document 1, the power consumption in the midnight time zone is still greater than in other time zones. In apartments such as condominiums, hot water heated during midnight hours is consumed during the day, so if there is a shortage of hot water, additional hot water may be heated at night. For this reason, the peak of power consumption occurs in the night time zone in addition to the midnight time zone. Therefore, there has been a demand for the development of a means for suppressing the peak of power consumption more effectively.

  In view of such a problem, the present invention can suppress the peak of power consumption in a midnight time zone or a night time zone in a plurality of heat pump hot water storage devices installed in a building that performs collective power reception. An object of the present invention is to provide a method for setting the operating time of a heat pump type hot water storage device that can reduce the contracted capacity and, in turn, reduce the electricity bill of consumers.

  In order to solve the above-described problems, a typical configuration of the operation time setting method of the heat pump hot water storage device according to the present invention is an operation time setting method of a plurality of heat pump hot water storage devices installed in a building that is receiving power collectively. It predicts the typical power consumption per unit time of the load of each door in the building, predicts the typical power consumption of the heat pump type hot water storage device of each door, and based on the contract capacity of the power contract of the building To calculate the marginal power per unit time by subtracting the typical power consumption per unit time of the load from the predetermined peak value, and divide the marginal power area by time zone Set multiple time frames and perform simulation calculation to allocate typical power consumption of heat pump hot water storage devices in each house to multiple time frames so that the peak value is not exceeded. And setting the operating time calculated by the emission calculating the heat pump type hot water storage device parentheses.

  According to the said structure, the peak of power consumption can be reduced by allocating the typical power consumption of the heat pump hot water storage apparatus of each house of a building to the time frame set to the area | region of surplus power. Therefore, it becomes possible to suppress the peak of power consumption in the midnight time zone or night time zone, to reduce the power receiving contract capacity of the collective power receiving method, and to reduce the electricity bill of the customer.

  In particular, in the above configuration, simulation calculation is performed, and the operation time calculated thereby is set in the heat pump hot water storage device. Thereby, the typical power consumption of a heat pump type hot water storage apparatus can be efficiently allocated to the time frame of surplus power. Therefore, the above-described effect can be further enhanced.

  With respect to the plurality of time frames, the simulation calculation may be performed using a setting in which the beginning of the time frame is set to start boiling and a setting in which the end of the time frame is set to complete boiling. According to such a configuration, it is possible to align the time when the heating time of the heat pump type hot water storage device of each door starts and when the heating is completed. Therefore, the number of operation time patterns can be reduced and the setting can be simplified.

  The daily operation time of the heat pump hot water storage device of each door may be divided into two, and the simulation calculation may be performed while changing the division ratio. However, it is preferable to secure an operation time of 1 hour or more when divided from the viewpoint of the energy saving effect of the heat pump hot water storage device. Thereby, the electric power consumption of the heat pump hot water storage apparatus of each house can be further subdivided, and it can allocate to the time frame of surplus electric power. Note that the operating time of the day is the operating time in the conventional midnight time zone (23:00 to 7:00), excluding the night time zone (17:00 to 23:00). May be.

  Of the above marginal power, a time frame may be an area in which constant power can be obtained continuously for a predetermined time. Thereby, the power consumption amount for operating a heat pump type hot water supply apparatus can be ensured within the range of surplus power.

  According to the present invention, in a plurality of heat pump hot water storage devices installed in a building that is performing collective power reception, it is possible to suppress the peak of power consumption in the midnight hours and night hours, and to reduce the power receiving contract capacity, As a result, it is possible to provide an operation time setting method for a heat pump hot water storage device that can reduce the electricity bill of the consumer.

It is the schematic explaining the operating time setting method of the heat pump type hot water storage apparatus concerning this embodiment. It is a flowchart explaining the operation time setting method of the heat pump type hot water storage apparatus concerning this embodiment. It is the figure which illustrated the simulation result of the power consumption in a building. It is a figure explaining the simulation calculation of step S212.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

  FIG. 1 is a schematic diagram for explaining an operation time setting method of the heat pump hot water storage device according to the present embodiment. Hereinafter, the case where the operation time setting method of the heat pump hot water storage device according to the present embodiment is executed using the management device 140 shown in FIG. Further, in the following description, the heat pump hot water storage device is referred to as a hot water storage device 120, and the operation time setting method thereof is simply referred to as an operation time setting method.

  FIG. 1A is a schematic diagram showing the overall configuration, and FIG. 1B is a block diagram showing the configuration of the management device 140. In an apartment house (hereinafter referred to as a building 102) shown in FIG. 1 (a), power is collectively received from a power company (hereinafter referred to as an electric power company 100) (high voltage power contract). The building 102 includes nine houses 102a, and each house 102a has a low-voltage power contract with the developer and management company of the building 102.

  As shown to Fig.1 (a), the operation control apparatus 130 is installed in each house 102a. Each house 102a (each house) is provided with a load 110 and a hot water storage device 120 (heat pump (HP) hot water storage device). Examples of the load 110 include electric devices such as an air conditioner, a television set, and a refrigerator arranged in the room of the house 102a. The hot water storage device 120 stores hot water generated by a heat pump in a hot water storage tank, and supplies the hot water to a hot water supply facility (not shown). The load 110 and the hot water storage device 120 are connected to the operation control device 130 via a LAN (Local Area Network). That is, a HEMS (Home Energy Management System) is constructed by the operation control device 130 in the house 102a.

  The electric power company 100 is provided with a management device 140 that manages the hot water storage device 120 installed in each house 102 a of the building 102. As shown in FIG.1 (b), the management apparatus 140 is comprised including the calculation means 142 which performs the setting of the operation time of a hot water storage apparatus, and the calculation at that time, and the data storage means 150 which memorize | stores various data. In the present embodiment, the calculation unit 142 and the data storage unit 150 are exemplified as a configuration included in the management device 140, but the present invention is not limited to this, and the calculation unit 142 and the data storage unit 150 may be separate devices. Good.

  The data storage unit 150 stores load data 152, hot water storage device standard data 154, and power contract data 156. The load data 152 is data related to the load 110 of each house 102a. Specifically, the type of load 110, its power consumption, data on residents who use the load 110 (number of people, time at home, etc.) can be exemplified. The hot water storage device standard data 154 is data relating to the standard of the hot water storage device 120 installed in each house 102a. The power contract data 156 is data relating to the content (contract capacity, etc.) of the high-voltage power contract between the building 102 and the electric power company 100. The regional standard weather data 158 is the standard monthly outside air temperature and water supply temperature of the region.

  FIG. 2 is a flowchart for explaining an operation time setting method of the heat pump hot water storage apparatus according to the present embodiment. Hereinafter, the operation time setting method according to the present embodiment, that is, the operation time setting method of the hot water storage device 120 installed in the building 102 that performs collective power reception will be described together with detailing the operation of the management device 140. .

  In the operation time setting method of the present embodiment, the calculation unit 142 of the management device 140 first refers to the load data 152 stored in the data storage unit 150, and determines the load 110 of each house 102a (each house) in the building 102. The power consumption per typical unit time is predicted (step S202). Subsequently, the calculation unit 142 refers to the hot water storage device standard data 154 and the load data 152 stored in the data storage unit 150, and typical power consumption (operation time × power consumption) of the hot water storage device 120 of each house 102a. Is predicted (step S204). The power consumption is predicted from the local standard weather data 158.

  FIG. 3 is a diagram illustrating a simulation result of power consumption in the building 102. By predicting typical power consumption of the load 110 of each house 102a in step S202 described above, a power consumption curve 220 (base curve) of the load 110 as shown in FIG. 3A is calculated. Then, in step S204, by predicting the typical power consumption of the hot water storage device 120 of each house 102a, the midnight peak 222a (time zone from 4 to 6 in the early morning) generated by the operation of the hot water storage device 120 is estimated. Peak load) and night peak 222b (peak load in the time zone from 21:00 to 22:00 at night) are predicted.

  As a cause of the occurrence of the midnight peak 222a, it is assumed that the hot water storage device 120 installed in each house 102a performs a boiling operation in order to store hot water used by a resident during the day. Yes. In addition, it is assumed that the night peak 222b is generated by additionally performing a boiling operation because the resident uses the hot water boiled at midnight during the day and the hot water is insufficient.

  Returning to FIG. 2, after predicting the power consumption of the load 110 and the typical power consumption of the hot water storage device 120, the calculation means 142 refers to the power contract data 156 stored in the data storage means 150, and A predetermined peak value is set based on the contract capacity of the power contract (step S206). In the example shown in FIG. 3A, the maximum value of the night peak 222 b in which the power consumption is the highest is the predetermined peak value 224.

  Subsequently, the computing unit 142 calculates margin power per unit time by subtracting typical power consumption per unit time of the load 110 from the predetermined peak value 224 (step S208). In the example shown in FIG. 3A, the region between the power consumption curve 220 and the peak value 224 becomes the region of the surplus power by accumulating the surplus power for each unit time.

  After calculating the surplus power, the calculation unit 142 sets a plurality of time frames by dividing the surplus power area by the time zone (step S210). In the example shown in FIG. 3A, the first time frame 226a is set in the time zone from 7 am to 10 am, and the second time frame 226 b is set in the time zone from 10:30 am to 17:30 in the evening. ing.

  When setting a time frame in step S210, it is preferable to set a time frame as an area in which a certain amount of power can be obtained continuously for a predetermined period of time. That is, the time frame may be set to be rectangular like the first time frame 226a and the second time frame 226b shown in FIG. Thereby, the power consumption amount for operating the hot water storage device 120 can be secured within the range of the surplus power.

  As a feature of the present embodiment, when the above-described time frame is set, the calculation unit 142 allocates the typical power consumption of the hot water storage device 120 of each house 102a to a plurality of time frames so as not to exceed the peak value. Simulation calculation (cutting calculation) is executed (step S212). Then, the worker who installs or maintains the hot water storage device 120 sets the operation time pattern calculated by the simulation calculation in step S212 in the hot water storage device 120 of each house 102a (step S214). Setting is performed for a controller attached to each hot water storage device 120. As a specific example, a set value may be input using a liquid crystal and a button of a controller. As another example, the dip switch provided in the controller may be operated to set the time and the distinction between the start of boiling or the completion of boiling.

  FIG. 4 is a diagram for explaining the simulation calculation in step S212. 4 exemplifies the case where the typical power consumption of the hot water storage device 120 at the midnight peak 222a is allocated to the second time frame 226b, the typical power consumption of the hot water storage device 120 at the night peak 222b is described. Similar processing is performed when assigning the amount to the first time frame 226a and the second time frame 226b.

  In FIG. 3A, the power consumption of the hot water storage device 120 at the midnight peak 222a is expressed in a trapezoidal region, but actually, as illustrated in FIG. 4A, the hot water storage of a plurality of houses 102a. The power consumption amount of the device 120 (displayed by a horizontally long bar) is integrated. In the simulation calculation in step S212, the power consumption of the hot water storage device 120 of each house 102a as expressed by a horizontally long bar is allocated to the first time frame 226a and the second time frame 226b so as not to exceed the peak value.

  4A, the power consumption of the hot water storage device 120 illustrated by a horizontally long bar (rectangular shape) is the power consumption of the hot water storage device 120 in the vertical axis direction (height), and the horizontal axis is time ( Operating time). The product of power consumption and time, that is, the area, is the power consumption of the hot water storage device 120. Here, the power consumption (vertical axis) of the hot water storage device 120 varies depending on the temperature, but in the present invention, the set value of the hot water storage device 120 does not perform detailed temperature correction in order to aim at peak suppression for each year or period, It is better to perform simulations using average power consumption throughout the year, or power consumption during each period (summer, winter and intermediate periods).

  In this embodiment, as shown in FIG. 4A, the daily operation time of the hot water storage device 120 of each house 102a is divided into two (shown by broken lines), and simulation calculation is performed while changing the division ratio. Thereby, the power consumption of the hot water storage device 120 of each house 102a is subdivided. Therefore, it is possible to reduce the gap in the time frame when the power consumption amount of the hot water storage device 120 is allocated, and it is possible to allocate more power consumption amount of the hot water storage device 120 to the time frame of surplus power.

  When allocating the power consumption amount of the hot water storage device 120 to the time frame of surplus power, the power consumption amount (bar) of the hot water storage device 120 of the midnight peak 222a divided into two is divided as shown in FIG. 4B. It fills in the 2-hour frame 226b (sampling calculation). Thereby, the power consumption of the hot water storage device 120 at the midnight peak 222a is accommodated (allocated) in the second time frame 226b. Such a simulation calculation for allocating the power consumption amount of the hot water storage device 120 to the time frame is repeated while changing the division ratio. And if the operation time of the hot water storage apparatus 120 of each house 102a is calculated by simulation calculation, the operation time will be set to the hot water storage apparatus 120.

  As described above, in the operation time setting method of the heat pump type hot water storage device of the present embodiment, the power consumption amount of the hot water storage device 120 in the peak time zone is allocated to the time frame of surplus power by simulation calculation. Thereby, for example, the power consumption of the hot water storage device 120 at the midnight peak 222a and the nighttime peak 222b in FIG. 3A is the first time frame 226a and the second time frame 226b during the day as shown in FIG. 3B. The peak value 224 of power consumption is suppressed. Therefore, it is possible to reduce the power receiving contract capacity of the collective power receiving method, and to reduce the electricity charge of the consumer.

  Note that the above-described series of processing (simulation calculation, setting change of the hot water storage device 120, etc.) is performed not only when moving in, but also during maintenance of the hot water storage device 120, and periodically such as annual update. It is possible to re-execute all units at once.

  Still more preferably, in step S212, for each of the plurality of time frames, the simulation calculation is performed using a setting in which the beginning of the time frame is set to start boiling and a setting in which the end of the time frame is set to completion of boiling. Good. Also in FIG. 4 (b) of the present embodiment, the power consumption (bar) of the hot water storage device 120 shown in FIG. 4 (a) is matched with the tip of the midnight peak 222a at the start of boiling (tip of power consumption). The pattern and the pattern in which the boiling completion of the hot water storage device 120 (the rear end of power consumption) is made to coincide with the rear end of the midnight peak 222a are allocated.

  For example, in the planing calculation, it is conceivable that the operation of the bar of the power consumption amount is started or completed at an arbitrary time for the time frame. However, when such processing is performed, the operation start time and operation completion time of the hot water storage device 120 of each house are different, and the maximum operation time pattern is the same as the number of the hot water storage devices 120. On the other hand, if the boarding calculation is performed so that the front end of the power consumption is aligned with the beginning of the time frame or the rear end of the power consumption is aligned with the end of the time frame, the operation pattern is the number of time frames x time The beginning or end of the frame (2 patterns) × tip alignment or trailing edge alignment (2 patterns). That is, since the number of operation time patterns can be reduced as compared with the case where the operation is started or completed at an arbitrary time, the setting can be simplified. In particular, when setting is performed using a dip switch, it is preferable that the operation time pattern is small.

  In the present embodiment, typical power consumption and power consumption of the load 110 and the hot water storage device 120 are referred to with reference to the load data 152, the hot water storage device standard data 154 and the power contract data 156 stored in the data storage means 150. Although the structure which estimates quantity was illustrated, it is not limited to this. For example, the history data of the power consumption of the load 110 and the hot water storage device 120 can be acquired by the operation control device 130 installed in each house 102a and used. This makes it possible to perform control with higher accuracy than using a typical power consumption curve. Furthermore, history data is stored in a storage medium when moving, and it is possible to perform highly accurate control from the beginning even at the new location.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the example which concerns. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  INDUSTRIAL APPLICABILITY The present invention can be used for an operation time setting method for a plurality of heat pump hot water storage devices installed in a building that receives power collectively and an operation planning system for such heat pump hot water storage devices.

DESCRIPTION OF SYMBOLS 100 ... Electric power company, 102 ... Building, 102a ... Housing, 110 ... Load, 120 ... Hot water storage device, 130 ... Operation control device, 140 ... Management device, 142 ... Calculation means, 150 ... Data storage means, 152 ... Load data, 154 ... Hot water storage device standard data, 156 ... Electric power contract data, 220 ... Power consumption curve, 222a ... Midnight peak, 222b ... Night peak, 224 ... Peak value, 226a ... First time frame, 226b ... Second time frame

Claims (4)

An operation time setting method for a plurality of heat pump hot water storage devices installed in a building that receives power collectively,
Predicting the typical power consumption per unit time of the load of each door in the building,
Predict the typical power consumption of the heat pump hot water storage device of each door,
Set a predetermined peak value based on the contracted capacity of the building power contract,
Calculate margin power per unit time by subtracting power consumption per unit time typical of the load from the predetermined peak value,
A plurality of time frames are set by dividing the area of the surplus power into time zones,
Perform a simulation calculation to allocate a typical power consumption of the heat pump hot water storage device of each door to the plurality of time frames so as not to exceed the peak value,
An operation time setting method for a heat pump type hot water storage device, wherein the operation time calculated by the simulation calculation is set in a heat pump type hot water storage device of each house.   The simulation calculation is performed for the plurality of time frames by using a setting that sets the beginning of the time frame as the start of boiling and a setting that sets the end of the time frame as the completion of boiling. The operating time setting method of the heat pump type hot water storage device described in 1.   The operation time setting method for a heat pump type hot water storage apparatus according to claim 1, wherein the daily operation time of the heat pump type hot water storage apparatus of each door is divided into two and the simulation calculation is performed while changing the division ratio.   The operation time setting method for a heat pump hot water storage device according to claim 1, wherein an area in which a certain amount of electric power can be continuously obtained for a predetermined time is used as the time frame.

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