JP4855982B2 - Building energy management equipment - Google Patents

Description

  The present invention relates to a building energy management apparatus that achieves energy saving by managing energy of a commercial building or the like.

  The need for energy saving is rapidly increasing against the background of global warming. In particular, the energy consumption of commercial buildings has increased significantly, and national measures such as the revision of the Energy Conservation Law and various support measures have been taken to promote energy conservation, and social responsibility as a building owner has come to be questioned. . Against this background, the introduction of BEMS (Building Energy Management System) is recommended and has become widespread as an energy-saving method for buildings.

BEMS collects and manages energy data using IT technology and the like, thereby achieving energy saving by performing efficient facility operation.
JP 2005-073415 A

  By the way, in such BEMS, energy consumption is managed by a method of statistically managing energy data using a form, a graph format, or the like.

  Furthermore, after a certain period of time such as one year or one month has passed, the energy integration value for that period is compared with the target value, a determination is made whether the target has been achieved or not achieved, and action for improvement is taken as the next step. It has been studied and executed (the operation was based on the so-called PLAN → DO → CHECK → ACTION cycle).

  Specifically, as shown in FIG. 7, the monthly energy consumption is baseline (value before energy conservation, generally using the average value for the past three years), planned value (energy consumption for each month due to energy conservation). Planned values for forecasting) and graphs plotting actual values up to the present time are used to determine the operating time of each load so that the annual target value can be achieved.

  In this case, the actual value until August is less than the planned value depending on the month (energy can be saved more than planned), or there is a month that exceeds the planned value (energy has not been saved as planned). Therefore, it is difficult to quantitatively grasp whether the annual energy saving effect can be achieved as planned.

  In other words, since the results were mainly managed, it is difficult to determine whether the energy saving effect will reach the annual target value if the operation is continued in the middle of the year or month, and the energy saving effect is insufficient. Even if it remains unchanged, it is difficult to take specific judgments and actions such as how much energy needs to be saved to achieve the annual target and how much load should be stopped. It was.

  In this way, since the conventional technology manages energy as a result, even if it turns out that the effect has not been achieved later, a significant energy saving effect is obtained by simply rewinding in the remaining period. It may not be possible to operate. PDC (PLAN-> DO-> CHECK-> ACTION) "C" is the stage where the result is obtained, and therefore, the improvement measures are considered for the first time, and "A" is implemented in the next fiscal year. BEMS did not have a function to take real-time measures against the failure to achieve the effect of the current year.

  In view of the above circumstances, the present invention determines whether the current energy consumption status is satisfactory or too much for the annual target value (or monthly target value, etc.) of energy used in the building, and has not been achieved. In order to achieve the target value of energy consumption, it is necessary to provide specific information on how much energy consumption should be reduced at the present time in order to achieve the target. The main purpose is to provide a building energy management system that can be used.

In order to achieve the above object, the present invention provides a building energy management apparatus that manages energy of buildings and saves energy, and groups devices that can be cut off from the devices to be energy managed in the building. In addition, prioritize the load shedding priority for each group, and set the priority device table that sets the rotation stoppage possible time when performing rotation stop control for each device in each group, and the annual target for energy used in the building When deciding a load to be blocked that is necessary to be less than or equal to the value, referring to the priority device table, there is a selection means that sequentially selects groups in descending order of the load cutoff priority, and is in the selected group For each device in the selected group so as to correspond to the rotation stoppage possible time of each device. It is characterized in by performing the station stop control that and a control means for the following year the target value of energy used in the building.

Further, the present invention registers in the priority device table a simultaneous stop interrupt order that sets a priority order when devices in a group are stopped all at once, and the selection means has the load cutoff priority order. When selecting groups in order from the highest, the load cutoff priority assigned to each group is compared with the simultaneous stop interrupt priority, and the control means determines the load cutoff priority based on the comparison result. Rotation stop control of each device included in the group, or simultaneous stop control of loads included in the group of the simultaneous stop interrupt priority, or the rotation stop control and the simultaneous stop control are executed in parallel. The energy used in the system is set to below the annual target value .

  In the building energy management apparatus according to the present invention, it is determined whether the current energy consumption status is satisfactory or too much with respect to the annual target value (or monthly target value, etc.) of energy used in the building, and it has not been achieved. In order to achieve the target value of energy consumption, it is necessary to provide specific information on how much energy consumption should be reduced at the present time in order to achieve the target. Can do.

"Constitution"
FIG. 1 is a block diagram showing an embodiment of a building energy management apparatus according to the present invention.

  The building energy management apparatus 1 shown in this figure includes an input unit 2 that is operated by an operator who manages the building, a display unit 3 that displays the operating status and energy usage status of each device arranged in the building, Processing to capture the operating status of equipment, energy usage status, etc., processing to control the operation of each device based on control instructions input from the input unit 2, target value, actual value, baseline of energy used in the building, And a control unit 4 configured by a computer that performs processing for displaying the load cutoff priority order on the display unit 3 and the like.

  The control unit 4 inputs the actual value of the energy used in the building at the present time, collates the input actual value with the target value for the predetermined period, and the collation result by the collating unit 41 Display control means 42 for displaying the current status with respect to the target value for the predetermined period on the display unit 3 in any of a cumulative graph in a format, a cumulative graph in a day format, or a cumulative graph in a time format. In addition, the control unit 4 includes a calculation unit 43 that calculates a specific value of the load capacity that should be interrupted at the present time in order to achieve the target value of the energy used in the building for a predetermined period, and the calculated value is displayed. It is displayed on the display unit 3 by the control means 42. Furthermore, when determining the interruption target load necessary for the energy used in the building to be equal to or lower than the annual target value, the control unit 4 sequentially selects groups in the order of higher load interruption priority. And control means 46 for controlling the stop of each device in the group selected in the rotation format so as to correspond to the possible stop time for each device in the selected group, and outputting control data to each device In addition, input / output means 47 for inputting output data from each device side is provided. In this case, when the blocking target selection unit 44 sequentially selects groups from the devices registered in the priority device table 45 in descending order of load blocking priority, the load blocking priority assigned to each group and simultaneous stop are selected. It has a function to compare the interrupt priority. Further, based on the comparison result, the control unit 46 performs either rotation stop control of each device included in the load cutoff priority group or simultaneous load stop control of the load included in the simultaneous stop interrupt priority group. Do.

<Operation>
Next, with reference to FIGS. 2 to 6, a target value for energy, an actual value, a baseline display method, a load cutoff priority display method, and the like will be described in detail.

  First, the verification unit 41 inputs the actual value of the energy used in the building through the input / output unit 47, and verifies the input actual value and the target value for a predetermined period. The calculation means 43 of the control unit 4 takes in the energy usage status of each device, calculates the cumulative value (actual value) of the energy used in the entire building, and graphs the cumulative value up to the current month. Calculate how much the planned target value is exceeded. In FIG. 2, the overvalue means the amount of energy that must be recovered by producing an energy saving effect that is greater than or equal to the planned value in the remaining period.

  If the difference between the target value and the actual value is “a” and the remaining number of months is “b”, an energy saving effect that is greater than the planned value by “a / b” on average per month is required.

  It is necessary to save energy by “a / (b × 31)” per day. Here, numeral 31 indicates the number of days of the month. Further, it is necessary to save energy by “a / (b × 31 × 24)” per hour.

  Next, the calculation means 43 develops the values calculated in this way into a month graph, a day graph, and a time graph as shown in FIGS.

  In FIG. 5, assuming that the energy consumption amount at the time “t” remaining is “c”, if the current energy consumption is changed without taking any measures as it is, the accumulated value at the time point after 60 minutes is “c”. × 60 / t ″.

In this time zone, if the original plan value (annual plan value is apportioned to the current month → current day → current time) is “d”, it is over by “(c × 60 / t) −d”. Become. Furthermore, unless the energy is saved by “a / (b × 31 × 24)” from the planned value, the annual target value cannot be achieved. Therefore, the load capacity that should be cut off at this time is
[Equation 1]
Breaking load capacity = [{(c × 60 / t) −d}
Ten {a / (b × 31 × 24)}] × (60 / t)
It becomes. The display control means 42 displays this numerical value on the display unit 3 together with the graph.

  As described above, as shown in FIGS. 2 to 5, whether there is no problem with the current energy consumption in order to achieve the annual energy saving target, and if there is a problem (possibly over), to achieve the annual target To provide the operator with information on the current interrupting load capacity (specific numerical value).

  Next, a function for actually shutting off a device corresponding to the capacity of the current interrupted load capacity calculated as described above will be described.

  First, prioritizing loads that can be blocked (blocking loads) for each device provided in the building and then operating the input unit 2, the blocking target selection means 44 displays as shown in FIG. 6. Register in the priority device table 45 displayed on the setting screen displayed in the section 3.

  At this time, as shown in the priority device table 45, the blocking target selection unit 44 groups the blocking control target loads and registers the priorities. A plurality of devices are registered in one group together with their capacity and rotation stoppable time. Also, the group stop time and the priority interrupt order for simultaneous stop are registered. The control means 46 performs the following control.

  In the example of the priority device table 45 shown in FIG. 6, the load (parking fan, etc.) belonging to the group of priority “1” is rotated one by one according to the stoppable time until the capacity reaches the necessary cutoff load. Stopped. If it is still not satisfied, the load (electric room fan or the like) belonging to the group of priority “2” similarly enters the rotation stop control. At this time, the rotation control with the priority “1” is also continued. If the necessary cut-off load is still not reached, the load with the priority “1” is stopped before entering the group with the priority “3”. If this is not enough, the rotation control of the group with priority “3” is started.

"effect"
In this way, in this embodiment, unlike the power demand control and the like intended to surpass only the peak time zone, from the viewpoint of energy saving that requires a long-term stop, so as not to hinder the operation of the building as much as possible, It is not a simple individual stop, but a function that does not have a conventional point in which devices are grouped and prioritized in units of groups, and rotation stop control is performed according to the stoppable time setting of each device.

  In addition, in order to cope with the case where it is better to stop all devices with a higher stop priority than to apply rotation control to a device group with a lower stop priority, interrupt the simultaneous stop control in the middle of the order. There is no conventional function.

  As a result, in order to achieve the annual energy saving target value at the present time, it is possible to grasp the amount of energy that can be used in the future, and by breaking down it from month → day → hour unit, each current situation is displayed in a cumulative graph The situation can be easily grasped, and the annual energy saving target can be achieved reliably and easily by grasping the numerical value of the necessary breaking load and executing the load breaking control that does not have much impact on operation. .

It is a block diagram which shows one Embodiment of the building energy management apparatus by this invention. It is a figure which shows an example of the annual graph (accumulation) used with the building energy management apparatus shown in FIG. It is a figure which shows an example of the present month graph (accumulation) used with the building energy management apparatus shown in FIG. It is a figure which shows an example of the day graph (cumulative) used with the building energy management apparatus shown in FIG. It is a figure which shows an example of the 60 minute graph (accumulation) used with the building energy management apparatus shown in FIG. It is a figure which shows the load interruption | blocking priority order registration example used with the building energy management apparatus shown in FIG. It is a figure which shows an example of the annual graph used with the building energy management apparatus known conventionally.

Explanation of symbols

1: Building energy management device 2: Input unit 3: Display unit 4: Control unit 41: Verification unit 42: Display control unit 43: Calculation unit 44: Blocking target selection unit 45: Priority device table 46: Control unit 47: Input / output means

Claims (2)

In a building energy management device that manages energy in buildings and saves energy,
Rotating when performing rotation stop control for each device of each group while grouping the devices that can be shut down from the devices subject to energy management in the building and assigning a load shedding priority to each group Priority device table with possible stop time and
When determining the load to be interrupted necessary to reduce the energy used in the building to an annual target value or less, the selection is made by referring to the priority device table and selecting the groups in order from the highest load interrupt priority. Means,
Rotation stop control is executed for each device in the selected group so as to correspond to the possible rotation stop time of each device in the selected group, and the energy used in the building is below the annual target value and control means for,
A building energy management device characterized by comprising: In the building energy management apparatus according to claim 1,
In the priority device table, register the simultaneous stop interrupt order that sets the priority when stopping the devices in the group all at once,
The selection means, when selecting a group sequentially in order from the highest load shedding priority, compares the load shedding priority assigned to each group and the simultaneous stop interrupt priority,
The control means, based on the comparison result, either rotation stop control of each device included in the load cutoff priority group, or simultaneous load stop control of the load included in the simultaneous stop interrupt priority group, or rotation. Execute stop control and simultaneous stop control in parallel to make the energy used in the building below the annual target value,
Building energy management device characterized by that.

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