JP2008102709A - Energy management system and energy management method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an energy management system for providing information for achieving the target of energy saving effects by using energy data measured by a building, and for achieving valid energy saving countermeasures. <P>SOLUTION: This energy management system for offering a service to provide management information for achieving the target of energy saving effects is provided with: an arithmetic means 10 for calculating an evaluation value for evaluating energy saving effects based on the target value of energy saving effects by using energy data showing amount of energy consumption; and an information providing means 12 for converting the evaluation value calculated by the calculation means into a designated information display format, and for providing it. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an energy management system that particularly manages energy consumed in a building such as a building remotely.

  2. Description of the Related Art In recent years, energy saving (so-called energy saving) measures that save energy consumption of electricity, gas, and heat in buildings such as buildings are important in terms of environmental influences and building operating costs. Energy conservation measures are actually taken by building owners, building management companies, building maintenance companies, and the like.

A business that provides services for monitoring the energy consumption state and providing information effective for energy-saving measures to such building owners and building management companies has attracted attention (for example, see Patent Document 1). .
JP 2006-98361 A

  In the above-mentioned service, energy data measured in the building is collected remotely using a network, the energy data is processed, and the graphed information on the actual value of energy consumption and the diagnosis result of the energy saving effect are obtained. Proposed to provide.

  However, an operator who performs energy management and energy saving measures at an actual site can provide effective energy saving measures that adapt to the circumstances of the site simply by providing actual results of energy consumption and results of diagnosis of energy saving effects. It is difficult to realize.

  Accordingly, an object of the present invention is to provide an energy management system that can provide effective information for energy saving by providing information for achieving an energy saving effect target using energy data measured in a building or the like. is there.

  An energy management system according to an aspect of the present invention includes a data collection unit that collects energy data indicating energy consumption from a measurement unit that measures energy consumption using a communication unit, and a data collection unit that collects the energy data. Storage means for storing the energy data, and calculation means for calculating an evaluation value for evaluating the energy saving effect based on a target value of the energy saving effect using the energy data stored in the storage means; And an information providing means for converting the evaluation value calculated by the calculating means into a specified information display format and providing it.

  ADVANTAGE OF THE INVENTION According to this invention, the information for achieving the target of an energy saving effect can be provided using the energy data measured in the building etc. As a result, it is possible to provide an energy management system capable of realizing an energy saving measure effective for a site such as a building.

  Embodiments of the present invention will be described below with reference to the drawings.

(System configuration)
FIG. 1 is a block diagram for explaining a configuration of an energy management system according to the present embodiment.

  The system according to the present embodiment includes, for example, a data collection terminal 20 installed in a building 2 of a service contract customer, and an energy management center (hereinafter simply referred to as a center) connected to the data collection terminal 20 via the communication line 3. 1) The main element is 1. The communication line 3 is a wired or wireless data communication medium using the Internet or a dedicated line.

  The data collection terminal 20 is composed of, for example, a personal computer, and measurement data (measurement data (measured by measuring devices 22 to 24) for measuring energy consumption of electricity (electric power), gas (city gas), and heat provided in the building 2 ( These may be collectively referred to as energy data) and collected in a storage device. Each of the measuring instruments 22 to 24 is specifically a power meter, a gas meter, and a thermometer.

  In the building 2, a management terminal 21 that is connected to the Web server 12 of the center 1 via the Internet 4 is provided. The management terminal 21 is composed of a personal computer, and has a function of accessing the Web server 12, receiving management information for energy saving effects, which will be described later, and storing it in a storage device. The management terminal 21 also has a function of transmitting the target value of the energy saving effect to the Web server 12 of the center 1 via the Internet 4.

  The center 1 is a system main body that executes an energy management service according to the present embodiment, and includes an energy data processing unit 10, a data server 11, and a Web server 12. The energy data processing unit 10 is a computer system including hardware (including a CPU, a display, an input device, and the like) and software, and is a main element that executes the energy management service processing of the present embodiment. As will be described later, the energy data processing unit 10 executes various arithmetic processes for creating management information of energy saving effects.

  The data server 11 is connected to the data collection terminal 20 via the communication line 3, receives energy data transmitted from the data collection terminal 20, and transfers the energy data to the energy data processing unit 10. The Web server 12 is connected to the management terminal 21 of the building 2 via the Internet 4, converts the energy saving effect management information created by the energy data processing unit 10 into a specified file format, and transmits it.

  FIG. 2 is a diagram illustrating a software configuration for realizing the functions of the energy data processing unit 10. As shown in FIG. 2, the energy data processing unit 10 includes an energy data input unit 30, a data storage unit 31, an input / output interface (GUI: graphical user interface) 32, and a calculation unit 33.

  The energy data input unit 30 inputs energy data received by the data server 11. The data storage unit 31 stores the input energy data, the calculation result calculated by the calculation unit 33, the management information of the energy saving effect, and the like in a storage device. The input / output interface 32 has an input interface for inputting an energy saving target value (TD) and energy data, and an output interface for displaying various calculation results from the calculation unit 33 on a display. The calculation unit 33 executes various calculation processes for creating management information of energy saving effects.

(System operation)
Hereinafter, the operation of the system of the present embodiment will be described with reference to FIGS.

  First, the basic operation of the system and the scheme of the energy management service will be described with reference to the flowchart of FIG.

  For example, based on a contract with a customer who operates the building 2, the center 1 collects energy data from the data collection terminal 20 installed in the building 2 (step S11). As described above, this energy data is a measured value of each energy consumption amount of electricity (electric power), gas (city gas), and heat.

  The energy data processing unit 10 of the center 1 uses the collected energy data to execute a calculation process for creating management information for energy saving effects as described later (step S12). This management information includes evaluation information for evaluating the energy saving effect.

  The Web server 12 converts the calculation result of the energy data processing unit 10 into a file format such as a table or a graph, and creates management information of the energy saving effect (step S13). The Web server 12 provides the management information of the energy saving effect to the management terminal 21 installed in the building 2 via the Internet 4 (Step S14).

  The manager of the building 2 browses the management information of the energy saving effect provided from the Web server 12 on the management terminal 21 on the display. Here, the administrator of the building 2 uses the management terminal 21 to transmit the target value (TD) of the energy saving effect to the Web server 12 and set it in the energy data processing unit 10 as shown in FIG. can do. The energy data processing unit 10 executes a calculation process based on the newly set target value (TD) of the energy saving effect (YES in step S15).

  In the present embodiment, the target value (TD) of the energy saving effect is input to the energy data processing unit 10 via the input / output interface 32 on the center 1 side. The center 1 periodically provides the management information of the energy saving effect to the management terminal 21 of the building 2 by repeating the above-described processing (steps S11 to S15).

(Management information and calculation method)
Next, with reference to the flowchart of FIG.4 and FIG.5, the content of the calculation process (operation | movement of the calculating part 33) of the energy data processing part 10 and the management information of an energy saving effect is demonstrated.

  The energy data processing unit 10 sets a target value (TD) and a baseline of an energy saving effect (sometimes abbreviated as an energy saving effect) by input from the input / output interface 32 (step S1). As shown in FIG. 4, the target value (TD) is, for example, an energy saving rate (may be abbreviated as an energy saving rate) in units of months, and is expressed as a percentage (%). In addition, the energy saving rate which converted the annual target value into the monthly target value may be used.

  The baseline is an actual value of energy consumption when energy saving measures are not taken, and is defined by, for example, an actual value for the same month in the previous year, an average value of actual values for the same month for the past three years, or a function of temperature. . Here, if the baseline for the month of energy conservation measures (hereinafter, the current month) is A, the target value of energy reduction is B, and the target value of energy reduction rate is C, then “B = A × C” There is a relationship. When the baseline is defined by a mathematical expression such as a function of temperature, it is common to set a reduction rate rather than a reduction amount as a target value.

  The energy data processing unit 10 inputs energy data indicating each energy consumption amount of electricity (electric power), gas, and heat of the building 2 collected by the data collection terminal 20 (step S2). The energy data processing unit 10 stores the input energy data (step S3).

  The energy data processing unit 10 uses the calculation unit 33 to calculate the evaluation value of the energy saving effect on a daily basis using the stored energy data (step S4). The evaluation value of the energy saving effect in units of days is calculated by comparing the actual value e of the daily energy consumption with the baseline value per day. In the present embodiment, the evaluation value is calculated as an energy saving rate (%).

  The baseline value per day is a value obtained by dividing the baseline A in the current month of the energy saving measure by the number of months, or a value obtained by weighting and converting a load difference such as a weekend. Also, if the baseline for the current month is defined as a function of temperature, calculate the baseline value a per day by substituting the average daily temperature into the formula and then dividing by the number of months. To do.

  The calculation unit 33 calculates the amount of energy reduction per day by performing a calculation of “baseline value a−result value e”. In addition, the calculation unit 33 calculates “energy reduction amount / baseline value a” as the amount of energy reduction per day.

  On the other hand, the energy data processing unit 10 uses the stored energy data by the calculation unit 33 to calculate the cumulative evaluation value of the energy saving effect (step S5). Further, the energy data processing unit 10 can achieve an energy saving effect necessary for the remaining days from the current day to the end of the month, for example, in order to achieve a monthly target value (energy saving rate) on a monthly basis based on the calculated cumulative evaluation value. A target value (future target value) is calculated (step S6).

  Specifically, when calculating the cumulative evaluation value, the cumulative energy consumption from the beginning of the current month to the present time and the cumulative baseline amount are calculated. For example, as shown in the item “cumulative” in FIG. 4, the cumulative energy consumption (actual unit or cumulative actual value) from April 1 at the beginning of the current month to April 13 at the present and the cumulative baseline amount calculate. In this case, the calculation of “cumulative baseline value−cumulative actual value” is executed as the cumulative energy reduction amount. As the cumulative energy reduction amount, the calculation of “total energy reduction amount / total baseline value” is executed.

  Next, as a specific method for calculating the future target value, the total amount of energy reduction amount in the remaining days from the present time to the end of the month is calculated as “= the monthly target energy reduction amount−the cumulative energy reduction amount up to the present time”. . Furthermore, the required energy reduction amount per day until the end of the month “= total amount of energy reduction amount of remaining days / number of remaining days” is calculated. Using this calculation result, the required energy reduction rate per day until the end of the month “the required amount of energy reduction per day until the end of the month / baseline value per day until the end of the month” is calculated. Alternatively, the amount of energy that can be consumed per day until the end of the month “baseline value per day until the end of the month—the amount of energy required to be reduced per day until the end of the month” may be calculated.

  Here, the total amount of the energy reduction amount of the remaining days may be converted by weighting on a weekend or the like. In this case, the baseline per day may be converted with the same weighting. Also, if the monthly baseline is defined as a function of temperature, the average temperature cannot be determined until the end of the month is waited for, so the monthly target energy reduction cannot be determined. In this case, an estimated value calculated based on the past average temperature of the same month, the average temperature from the beginning of the month to, for example, the 10th day, or the tendency of temperature fluctuation may be substituted.

  By the calculation processing in the energy data processing unit 10 as described above, the evaluation value of the energy saving effect of the daily unit and the cumulative total is calculated. The Web server 12 creates energy-saving effect management information based on the calculated evaluation value of the energy-saving effect and provides it to the management terminal 21 of the building 2.

  FIG. 4 is a specific example of management information related to this embodiment. This management information includes, for example, monthly energy saving target values (actually, energy saving target rates), daily evaluation values, actual energy consumption (items written as energy), baseline, energy saving rate (actual results) In addition, the cumulative evaluation value (cumulative item) and future target value (item of the energy saving rate necessary for achieving the monthly energy saving rate) are included. Here, it is assumed that each energy consumption amount of electricity, gas, and heat is converted as an overall energy consumption amount.

  By the way, when the baseline is defined as a function of temperature, it is difficult to estimate the future temperature, and it is difficult to calculate the energy consumption as a future target value. Therefore, in practice, as shown in FIG. 4, the energy data processing unit 10 uses the target value of the number of days, the energy saving rate, and the monthly energy saving rate up to the present time, so that the energy data processing unit 10 needs the required energy saving rate as the future target value. The information 100 consisting of is calculated.

  That is, the monthly energy saving rate is calculated by the calculation of “= (energy saving rate so far × number of days until now + energy saving rate in the future × number of days in the future) / days in the month”. Using this calculation result, the future energy saving rate “= (monthly energy saving rate × number of days in month−current energy saving rate × number of days until now) / number of days in the future” is calculated. Here, information 100, which is the target value in the future, will be 12.2% as the cumulative energy-saving rate value at the end of the month, so it is necessary for achieving this (from April 14th) Including the result of calculating 13.9%, which is the standard of energy saving rate, as the required energy saving rate.

  As described above, in the system according to the present embodiment, the energy saving effect including the evaluation value for evaluating the energy saving effect based on the energy saving target value set for the year or month for the customer who operates the building 2. A service that provides management information in a table format or a graph format can be realized.

  As the management information, a future target value (actually a required energy saving rate) can be calculated together with the daily energy saving performance value (energy saving rate), for example, in the middle of the monthly operation. Therefore, it is possible to grasp the current state in the middle stage of the operation period, and to confirm whether or not the energy saving target value can be achieved in the future with specific numerical values. As a result, the energy saving operation manager can consciously confirm the achievement of the target. In other words, if the energy saving effect in daily operation is less than the target value, the energy saving effect required for the remaining period will be realized with a sense of crisis, and as a result The possibility of achieving the target value is increased.

  The service provided by the system according to the present embodiment is particularly effective for a customer who operates a building every day, especially for operation for achieving an energy saving target value for a long period of time such as a year or a month. In other words, since the achievement level of the energy saving target that is difficult to grasp in the middle of operation can be confirmed with specific numerical values, it is possible to provide useful services to building operators.

  In the present embodiment, the center 1 has described the case where the created management information is provided via the Internet 4. However, the present invention is not limited to this, and other information transmission media such as a facsimile may be used.

(Modification of the embodiment)
As a modification, the energy saving target can be applied not only to monthly and annual targets but also to target management in an arbitrary period. Further, as a modified example, an alarm is given to the management terminal 21 in the building 2 when, for example, the target value of the annual energy saving rate cannot be reached as judged from the cumulative evaluation value in the middle of the operation period. Includes services that display.

  Furthermore, as another modified example, a service combining control such as forcibly cutting off the load when the target value of the energy saving rate cannot be reached as judged from the cumulative evaluation value in the middle of the operation period including. Specifically, it is assumed that the center 1 has a control device for monitoring and controlling the energy consumption of electricity, gas, and heat in the building 2 by remote control. This control device cannot be achieved when the actual value of the energy saving effect is outside the allowable range with respect to the target value based on the evaluation value calculated by the energy data processing unit 10, that is, within a predetermined period. In the case, the control for reducing the energy consumption is executed.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

The block diagram for demonstrating the structure of the energy management system regarding embodiment of this invention. The block diagram for demonstrating the software structure regarding this embodiment. The figure for demonstrating the setting method of the target value of the energy saving effect regarding this embodiment. The figure which shows an example of the management information of the energy saving effect regarding this embodiment. The flowchart for demonstrating the process sequence of the energy data process part regarding this embodiment. The flowchart for demonstrating the process sequence of the energy management system regarding this embodiment.

Explanation of symbols

1 ... Energy management center, 2 ... Building, 3 ... Communication line, 4 ... Internet,
10 ... Energy data processing unit, 11 ... Data server, 12 ... Web server,
20 ... Data collection terminal, 21 ... Management terminal, 22-24 ... Measuring instrument,
30 ... Energy data input unit, 31 ... Data storage unit,
32... Input / output interface (GUI), 33.

Claims (10)

Data collecting means for collecting energy data indicating the energy consumption from the measuring means for measuring the energy consumption using the communication means;
Storage means for storing energy data collected by the data collection means;
Calculation means for calculating an evaluation value for evaluating the energy saving effect based on a target value of the energy saving effect using the energy data stored in the storage means;
An energy management system, comprising: information providing means for converting the evaluation value calculated by the computing means into a specified information display format and providing the converted value. The measuring means includes a measuring device that measures consumption of each energy of electricity, gas, and heat,
The energy management system according to claim 1, wherein the calculation unit is configured to calculate an evaluation value that comprehensively evaluates the consumption amount of each energy. The computing means is
The energy management system according to claim 1, wherein an evaluation value for cumulatively evaluating the energy saving effect is calculated using energy data stored in the storage unit. The information providing means is configured to provide the evaluation value information converted into a specified information display format through a network,
The energy management system according to claim 1, wherein a service for providing the evaluation value information from the information providing unit is provided to an external system that monitors energy consumption and realizes an energy saving effect. The computing means is
As the evaluation value, calculating an energy saving rate that is a future target based on an energy saving rate that is an actual value of an energy saving effect in any one of a daily unit, a monthly unit, and an annual unit, and an energy saving effect target value. The energy management system according to any one of claims 1 to 4. The information providing means includes
The information including a specified alarm is provided when the actual value of the energy saving effect is out of the allowable range with respect to the target value based on the evaluation value calculated by the calculating means. The energy management system according to claim 5.   Based on the evaluation value calculated by the calculation means, when the actual value of the energy saving effect is out of the allowable range with respect to the target value, the external system for monitoring the energy consumption and realizing the energy saving effect The energy management system according to claim 1, further comprising means for executing control for reducing the energy consumption. A process of collecting energy data indicating the energy consumption by type from a measuring means for measuring the energy consumption by type using a communication means;
A process of storing energy data collected by the data collection means in a storage means;
Based on a target value of the energy saving effect, a calculation process for calculating an evaluation value for evaluating the energy saving effect using energy data stored in the storage means;
The energy management method characterized by performing the procedure which has the process which converts and provides the evaluation value calculated by the said calculating means to the designated information display format.   The energy management method according to claim 8, wherein a service process for providing information converted into a previous information display format is executed for an external system that monitors energy consumption and realizes an energy saving effect. The arithmetic processing is as follows:
The evaluation value includes a process for calculating an energy saving rate that is a result value of the energy saving effect in any one of a daily unit, a monthly unit, and a year unit, and a future energy saving rate based on the target value of the energy saving effect. The energy management method according to any one of claims 8 and 9, wherein

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