ENERGY-SAVING EFFECT DISPLAY DEVICE, ENERGY-SAVING EFFECT DISPLAY METHOD, AND ENERGY-SAVING EFFECT DISPLAY PROGRAM

Abstract

To accurately evaluate an effect of an energy-saving measure.SOLUTION: An energy-saving effect display device includes: a calculation part configured to obtain, according to performance data related to a past operation condition of an object facility, first implementation time index data and second implementation time index data related to an energy use status in the object facility in an implementation time of an energy-saving measure and first non-implementation time index data and second non-implementation time index data related to an energy use status at the object facility in a non-implementation time of the energy-saving measure; and a display control part configured to cause a display part to display improvement effect information showing a relation between first improvement effect data showing an improvement effect by an implementation of the energy-saving measure obtained according to the first implementation time index data and the first non-implementation time index data, and second improvement effect data showing an improvement effect by the implementation of the energy-saving measure obtained according to the second implementation time index data and the second non-implementation time index data.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to an energy-saving effect display device, an energy-saving effect display method, and an energy-saving effect display program. [Background technology]

[0002] For example, energy saving is being considered in facilities such as factories. Known energy saving technologies are described in, for example, Patent Documents 1 to 4. For example, Patent Document 3 discloses a technology that calculates energy costs before and after the application of an energy saving measure based on past performance data of a target facility, and compares the energy costs before and after the application of the energy saving measure. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-106514 A [Patent Document 2] JP 2006-304595 A [Patent Document 3] JP 2005-141403 A [Patent Document 4] JP 2019-193571 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned technology, only energy costs are evaluated as the target of the evaluation of the effectiveness of energy-saving measures, but indices other than energy costs (e.g., energy consumption, CO2 emissions, etc.) are also important points of interest when evaluating the effectiveness of energy-saving measures. Therefore, when evaluating the effectiveness of energy-saving measures, it is desirable to consider the effectiveness of the energy-saving measures with respect to multiple types of indices, not just a single one. However, such indices change due to various factors other than the energy-saving measures, and further, the way in which the indices change may differ depending on the type of indices. Therefore, it is difficult to accurately evaluate the effectiveness of energy-saving measures with respect to such indices.

[0005] The present disclosure describes an energy-saving effect display device, an energy-saving effect display method, and an energy-saving effect display program that are capable of accurately evaluating the effect of an energy-saving measure. [Means for solving the problem]

[0006] An energy-saving effect display device according to one embodiment of the present disclosure includes a calculation unit that calculates, based on performance data regarding the past operating conditions of the target facility, first implementation-time index data and second implementation-time index data that are different types from each other and include information regarding energy usage conditions in the target facility when the energy-saving measure is not being implemented, and first non-implementation-time index data and second non-implementation-time index data that include information regarding energy usage conditions in the target facility when the energy-saving measure is not being implemented and correspond to the first implementation-time index data and the second implementation-time index data, respectively, and a display control unit that causes the display unit to display improvement effect information indicating the relationship between first improvement effect data obtained based on the first implementation-time index data and the first non-implementation-time index data and indicating the improvement effect due to the implementation of the energy-saving measure, and second improvement effect data obtained based on the second implementation-time index data and the second non-implementation-time index data.

[0007] An energy saving effect display method according to one embodiment of the present disclosure includes: obtaining first implementation time index data and second implementation time index data which are different types from each other and include information regarding energy usage in the target facility when the energy saving measure is being implemented, and first non-implementation time index data and second non-implementation time index data which include information regarding energy usage in the target facility when the energy saving measure is not being implemented, and which correspond to the first implementation time index data and the second implementation time index data, respectively, based on actual data regarding the past operating conditions of the target facility; and displaying improvement effect information on a display unit which indicates the relationship between first improvement effect data obtained based on the first implementation time index data and the first non-implementation time index data and which indicates the improvement effect due to the implementation of the energy saving measure, and second improvement effect data obtained based on the second implementation time index data and the second non-implementation time index data.

[0008] An energy saving effect display program according to one embodiment of the present disclosure causes a computer to perform the following steps based on actual data regarding the past operating conditions of the target facility: obtaining first implementation-time index data and second implementation-time index data which are different types from each other and include information regarding energy usage in the target facility when the energy saving measure is being implemented, and first non-implementation-time index data and second non-implementation-time index data which include information regarding energy usage in the target facility when the energy saving measure is not being implemented and correspond to the first implementation-time index data and the second implementation-time index data, respectively; and displaying on a display unit improvement effect information indicating the relationship between first improvement effect data obtained based on the first implementation-time index data and the first non-implementation-time index data and which indicates the improvement effect due to the implementation of the energy saving measure, and second improvement effect data obtained based on the second implementation-time index data and the second non-implementation-time index data and which indicates the improvement effect due to the implementation of the energy saving measure.

[0009] In the above-mentioned energy-saving effect display device, energy-saving effect display method, and energy-saving effect display program, first implementation time index data and second implementation time index data regarding the energy usage status in the target facility when the energy-saving measure is implemented, and first non-implementation time index data and second non-implementation time index data regarding the energy usage status in the target facility when the energy-saving measure is not implemented are obtained based on the performance data regarding the past operation status of the target facility. Then, improvement effect information showing the relationship between the first improvement effect data obtained based on the first implementation time index data and the first non-implementation time index data and the second improvement effect data obtained based on the second implementation time index data and the second non-implementation time index data is displayed on the display unit. By referring to the improvement effect information, the user can grasp the presence or absence of a correlation between the first improvement effect data and the second improvement effect data. For example, if the second improvement effect data becomes smaller as the first improvement effect data becomes larger, the user can grasp that there is a trade-off relationship between the first improvement effect data and the second improvement effect data. In this way, the user can understand how the changes in different types of index data affect each other, and can analyze in detail the factors behind the changes in the first improvement effect data and the factors behind the changes in the second improvement effect, thereby enabling the user to accurately evaluate the effects of the energy-saving measures.

[0010] In some embodiments, the first improvement effect data may be data indicating a difference between the first non-implementation index data and the first implementation index data, and the second improvement effect data may be data indicating a difference between the second non-implementation index data and the second implementation index data. In this case, the user can quantitatively grasp the relationship between the first improvement effect data and the second improvement effect data, and therefore can analyze the factors of the change in the first improvement effect data and the factors of the change in the second improvement effect in more detail. As a result, the user can more accurately evaluate the effect of the energy saving measures.

[0011] In some embodiments, the display control unit may display an approximation formula that approximates the relationship between the first improvement effect data and the second improvement effect data on the display unit together with the improvement effect information. In this case, the user can easily grasp the relationship between the first improvement effect data and the second improvement effect data, which makes it easier to evaluate the effect of the energy-saving measures. Effect of the Invention

[0012] According to some aspects of the present disclosure, there are provided an energy-saving effect display device, an energy-saving effect display method, and an energy-saving effect display program that are capable of more accurately evaluating the effect of an energy-saving measure. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is a configuration diagram of an energy-saving effect display device according to an embodiment. [Diagram 2] FIG. 2 is an example of a screen for setting extraction conditions. [Diagram 3] 3(a) and 3(b) are diagrams for explaining the estimation process of the energy index estimation unit. [Figure 4] FIG. 4 is a graph showing the relationship between "energy cost reductions" and "CO2 emission reductions." [Diagram 5] FIG. 5 is a graph showing the relationship between "energy cost reduction rate" and "CO2 emission reduction rate." [Figure 6] FIG. 6 is a diagram showing an example of a procedure for operating the energy-saving effect display device. [Figure 7] FIG. 7 is a diagram illustrating an example of a hardware configuration of the energy-saving effect display device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In the description of the drawings, the same elements are given the same reference numerals, and duplicated descriptions will be omitted as appropriate.

[0015] [Energy saving effect display device] First, a configuration of an energy-saving effect display device 1 according to an embodiment will be described with reference to Fig. 1. The energy-saving effect display device 1 is used to evaluate the effectiveness of energy-saving measures for a target facility. The target facility is, for example, a factory or a plant. The energy-saving measures include, for example, systematic measures such as reducing the amount of received power or fuel consumption by optimizing the operation plan of energy equipment (gas turbines, boilers, storage batteries, etc.), as well as manual measures such as encouraging frequent shut-off of lighting and air conditioning.

[0016] 1, the energy-saving effect display device 1 includes, for example, an energy data input unit 21, an energy data storage processing unit 11, an energy database 12, an extraction condition designation unit 22, an energy data extraction unit 13, an energy-saving measure implementation time data extraction unit 14, an energy index calculation unit 15 (calculation unit), an energy index estimation unit 16 (calculation unit), a graph creation unit 17 (display control unit), a display unit 31, and a display switching unit 23 (display control unit). Of these, the energy data input unit 21, the extraction condition designation unit 22, and the display switching unit 23 may be configured as an input interface 20 that acquires information input by a user. The display unit 31 may be configured as an output interface 30 that outputs information handled by the energy-saving effect display device 1 to a user.

[0017] The energy data input unit 21 receives energy data D1 (performance data) related to the past operation status of the target facility. The information related to the operation status of the target facility includes, for example, information related to the consumption status of energy required for the operation of the target facility, such as the amount of power consumed, the amount of steam consumed, the amount of fuel consumed, the unit price of electricity, the unit price of steam, and the unit price of fuel, as well as information related to the production status, such as the production volume of products manufactured by the operation of the target facility, and information related to the weather conditions, such as the temperature, when the target facility was operated. Therefore, the energy data D1 includes various data, such as the amount of power consumed, the amount of steam consumed, the amount of fuel consumed, the unit price of electricity, the unit price of steam, the unit price of fuel, the temperature, humidity, and the production volume. The various data of the energy data D1 may affect the energy index D2. Hereinafter, any one of the various data of the energy data D1 may be referred to as "first energy data" (first performance data), and the other one, i.e., a type of data different from the "first energy data", may be referred to as "second energy data" (second performance data).

[0018] Date and time information indicating the date and time when the energy data D1 was acquired and history information indicating the implementation history of energy saving measures for the target facility when the energy data D1 was acquired are input to the energy data input unit 21 together with the energy data D1. That is, the energy data D1 is input to the energy data input unit 21 in a state where it is associated with the date and time information and the history information. The date and time information is information indicating the day or time period when the energy data D1 was acquired. The history information is information indicating whether or not energy saving measures were implemented for the target facility when the energy data D1 was acquired. The energy data D1 may be automatically input to the energy data input unit 21 from an external system or may be manually input to the energy data input unit 21.

[0019] The energy data storage processing unit 11 performs a process of saving (storing) the energy data D1 input to the energy data input unit 21 in the energy database 12. The energy database 12 stores the input energy data D1 together with date and time information and history information. Therefore, the energy data D1 is stored in the energy database 12 in a state where it is associated with the date and time information and the history information.

[0020] The extraction condition designation unit 22 acquires conditions (extraction conditions) for extracting energy data D1 to be finally displayed on the display unit 31 from the energy data D1 stored in the energy database 12. The designation of the extraction conditions is performed, for example, by a user. The extraction conditions may include designation of a period to be displayed on the display unit 31 and designation of the energy data D1 to be displayed on the display unit 31. The period to be displayed is designated, for example, in units of hours, days, weeks, months, or years, and is determined by designating the start and end points of the period. When the "period" is designated, the electricity unit price, steam unit price, fuel unit price, and temperature of the energy data D1 may each be expressed as an average value during the period. When the period is designated in months, the power consumption, steam consumption, fuel consumption, and production amount of the energy data D1 may each be expressed as an amount per month.

[0021] Screen example X shown in FIG. 2 is an example of a screen for specifying extraction conditions. As shown in FIG. 2, screen example X has items for specifying extraction conditions for each of "period" and "energy data". "Period" in screen example X has an item for specifying the start point of the "period" and an item for specifying the end point of the "period". In screen example X, any month selected by the user is input as the start point and end point of the "period". "Energy data" in screen example X has items for each type of energy data.

[0022] The "Energy Data" items in the example screen X include monthly power consumption [kWh / month], monthly production [kWh / month], average temperature [℃], average electricity cost [yen / kWh], and average fuel cost [yen / Nm 3 ] are shown. In addition to these, the "energy data" item of screen example X may show other types of energy data (for example, the amount of steam consumed per month). The items provided in the "energy data" of screen example X may be arbitrarily selected by user input. Furthermore, in addition to the designation of the "period" and the designation of the "energy data", screen example X may also be provided with the designation of "history information". In this case, the user may select whether or not to implement an energy measure in the "history information" item of screen example X. In such an embodiment, it is not necessary for the history information to be stored in the energy database 12.

[0023] For each "energy data" item in screen example X, a check box labeled "specify" or the like is provided in the input field. Each item is specified by checking or unchecking the check box. When a check box for a certain item is checked, the energy data D1 related to that item is subject to extraction. On the other hand, when a check box for a certain item is not checked, the energy data D1 related to that item is not subject to extraction. Therefore, the energy data D1 to be extracted can be switched depending on whether the check box is checked or unchecked. This makes it easy to switch between enabling and disabling extraction conditions.

[0024] In the screen example X shown in FIG. 2, the check box of the item indicating the average fuel unit price is not checked, so that the average fuel unit price of the energy data D1 is excluded from the extraction conditions. In this way, when the check box of a certain item is unchecked (i.e., when a certain item is excluded from the extraction conditions), the background color of the item (for example, the "value" column) may be changed. This allows the user to intuitively understand that the item is not used in the extraction conditions. Also, as shown in the screen example X, the lower limit value and the upper limit value of the energy data D1 in the specified period may be displayed for each item of the energy data D1. Also, as shown in the screen example X, the number of months that match the extraction conditions specified by the user (shown as "corresponding months" in FIG. 2) may be displayed. The user can adjust (for example, relax or strengthen) the extraction conditions based on this information. In this way, the screen for specifying the extraction conditions may have a function of assisting the user in specifying the extraction conditions by displaying information that the user can refer to.

[0025] Referring again to FIG. 1, the energy data extraction unit 13 extracts energy data D1 that matches the extraction condition specified by the extraction condition specification unit 22 from the energy data D1 stored in the energy database 12. The energy-saving measure implementation data extraction unit 14 further extracts energy data at the time of implementing the energy-saving measure (hereinafter referred to as "implementation-time energy data D11") from the energy data D1 extracted by the energy data extraction unit 13. Specifically, the energy-saving measure implementation data extraction unit 14 identifies the implementation-time energy data D11 from the energy data D1 extracted by the energy data extraction unit 13 by referring to history information associated with the energy data D1. Note that the energy data D1 includes energy data at the time of not implementing the energy-saving measure (hereinafter referred to as "non-implementation-time energy data D12") in addition to the implementation-time energy data D11.

[0026] The energy index calculation unit 15 obtains an energy index D2 (index data) for a period corresponding to the energy data D1 based on all the energy data D1 extracted by the energy data extraction unit 13. The energy index D2 is data on the energy usage in the target facility, and is used to evaluate energy-saving measures. The energy index D2 includes various data such as energy usage, CO2 emissions, and energy costs. For example, when the extraction condition designation unit 22 designates the "period" in months, the energy usage, CO2 emissions, and energy costs may each be amounts per month. The energy usage may be the amount of energy required for one production unit (i.e., the amount of energy required to produce one product). Hereinafter, any one of the various data of the energy index D2 may be referred to as a "first energy index" (first index data), and the other one, i.e., data of a type different from the "first energy index", may be referred to as a "second energy index" (second index data).

[0027] The energy index calculation unit 15 calculates an energy index D2 when an energy saving measure is implemented (hereinafter referred to as "actual value D21 of energy index when implemented") based on the implementation-time energy data D11, which is an actual value. Also, the energy index calculation unit 15 calculates an energy index D2 when an energy saving measure is not implemented (hereinafter referred to as "actual value D22 of energy index when not implemented") based on the non-implementation energy data, which is an actual value.

[0028] On the other hand, the energy index estimation unit 16 obtains an estimated value D23 of the non-implementation energy index (non-implementation index data) in the case where the energy saving measure is not implemented, based on the implementation energy data D11. As a result, based on the same implementation energy data D11, an estimated value D23 of the non-implementation energy index, which is the estimation result of the energy index estimation unit 16, is obtained in addition to the actual value D21 of the implementation energy index, which is the calculation result of the energy index calculation unit 15. The energy index estimation unit 16, together with the energy index calculation unit 15, is configured as a calculation unit for calculating the energy index D2 based on the energy data D1.

[0029] Usually, the energy data D1 varies depending on the operation status of the target facility, so that the implementation-time energy data D11 does not match the non-implementation-time energy data D12. Therefore, for one energy data D1, only one of the implementation-time energy index actual value D21 and the non-implementation-time energy index actual value D22 exists. In response to this, the energy index estimation unit 16 estimates and calculates the non-implementation-time energy index estimated value D23 based on the implementation-time energy data D11 that is the basis for the calculation of the implementation-time energy index actual value D21. As a result, for one implementation-time energy data D11, both the implementation-time energy index actual value D21 and the non-implementation-time energy index estimated value D23 exist. This makes it possible to compare the implementation-time energy index actual value D21 and the non-implementation-time energy index estimated value D23 for the common implementation-time energy data D11.

[0030] The energy-saving effect display device 1 does not necessarily have to include the energy index estimation unit 16. For example, by setting an area in which the energy-saving measures are implemented and an area in which the energy-saving measures are not implemented in the target facility, the energy data D11 at the time of implementation and the energy data D22 at the time of non-implementation can be acquired simultaneously under a common operating condition. In this case, the energy index calculation unit 15 can obtain the actual value D21 of the energy index at the time of implementation and the actual value D22 of the energy index at the time of non-implementation based on the common energy data D1, so that both the actual value D21 of the energy index at the time of implementation and the actual value D22 of the energy index at the time of non-implementation exist for the common energy data D1. In this case, it becomes possible to compare the actual value D21 of the energy index at the time of implementation and the actual value D22 of the energy index at the time of non-implementation for the common energy data D11.

[0031] Here, the estimation process of the energy index estimation unit 16 will be described with reference to Fig. 3(a) and Fig. 3(b). The energy index estimation unit 16 uses the non-execution energy data and the non-execution energy index as learning data, and constructs an estimation model M for calculating an estimated value D23 of the non-execution energy index based on the execution energy data D11 by machine learning. For example, supervised learning can be used as the machine learning. For example, supervised learning algorithms include neural networks including deep learning, decision trees, and support vector regression.

[0032] Fig. 3(a) conceptually illustrates the process during learning of the energy index estimation unit 16. As illustrated in Fig. 3(a), the energy index estimation unit 16 performs a learning process in which non-implementation energy data (e.g., power consumption, steam consumption, fuel consumption, electricity unit price, fuel unit price, temperature, production volume, etc.) are used as explanatory variables of the teacher data, and non-implementation energy indexes (e.g., energy consumption, energy consumption required per production, CO2 emission, energy cost, etc.) are used as objective variables of the teacher data, thereby constructing an estimation model M.

[0033] FIG. 3(b) conceptually illustrates the process of the energy index estimation unit 16 during estimation. As shown in FIG. 3(b), the energy index estimation unit 16 estimates the estimated value D23 of the non-execution energy index as the objective variable from the explanatory variable based on the implementation energy data D11 using the constructed estimation model M. In this way, the energy index estimation unit 16 calculates the estimated value D23 of the unknown non-execution energy index based on the known implementation energy data D11. As a result, both the actual value D21 of the implementation energy index and the estimated value D23 of the non-execution energy index are obtained for the common energy data D1. Note that the timing of the machine learning in FIG. 3(a) is arbitrary as long as it is before the result is displayed on the display unit 31 (i.e., before step S3 in FIG. 7 described later). For example, the estimation model M may be incorporated in the design stage of the energy-saving effect display device 1, or learning and re-learning may be performed each time during the execution of the energy-saving effect display device 1 while using the latest data.

[0034] The graph creation unit 17 shown in FIG. 1 creates one or more graphs (improvement effect information) to be displayed on the display unit 31 based on the energy indexes calculated by the energy index calculation unit 15 and the energy index estimation unit 16. Hereinafter, the first energy index when not being implemented is referred to as the first non-implementation energy index (first non-implementation index data), and the first energy index when being implemented is referred to as the first implementation energy index (first implementation index data). In addition, the second energy index when not being implemented is referred to as the second non-implementation energy index (second non-implementation index data), and the second energy index when being implemented is referred to as the second implementation energy index (second implementation index data). In this case, the first non-implementation energy index and the second non-implementation energy index are different types from each other, and the first implementation energy index and the second implementation energy index correspond to the first non-implementation energy index and the second non-implementation energy index, respectively. That is, the first implementation energy index is of the same type as the first non-implementation energy index, and the second implementation energy index is of the same type as the second non-implementation energy index.

[0035] The graph displayed on the display unit 31 shows the relationship between the first improvement effect data obtained based on the first non-implementation energy index and the first implementation energy index, and the second improvement effect data obtained based on the second non-implementation energy index and the second implementation energy index. The first improvement effect data and the second improvement effect data are data showing the improvement effect of the energy usage situation due to the implementation of the energy saving measure. For example, the first improvement effect data is data showing the difference between the first non-implementation energy index and the first implementation energy index, and the second improvement effect data is data showing the difference between the second non-implementation energy index and the second implementation energy index. The first improvement effect data may be data showing the ratio between the first non-implementation energy index and the first implementation energy index, and the second improvement effect data may be data showing the ratio between the second non-implementation energy index and the second implementation energy index.

[0036] The graph creation unit 17 outputs the created one or more graphs to the display unit 31, and causes the display unit 31 to display the output graphs. The graph creation unit 17, together with the display switching unit 23, is configured as a display control unit for controlling the contents displayed on the display unit 31. The graph creation unit 17 may create an approximation equation that approximates the relationship between the first improvement effect data and the second improvement effect data. As a method for creating the approximation equation, any method may be adopted, such as power approximation, polynomial approximation, exponential approximation, linear approximation, logarithmic approximation, and moving average. In addition, the degree of the polynomial approximation when it is adopted is not particularly limited. The graph creation unit 17 may cause the display unit 31 to display the approximation equation and an approximation line indicated by the approximation equation together with the created graph.

[0037] The display unit 31 displays one or more graphs created by the graph creation unit 17 on the screen. The display switching unit 23 acquires an instruction to switch and change the contents and format displayed on the display unit 31. The instruction to switch the display contents is given, for example, by a user. The display switching unit 23 instructs the display unit 31 to change the display contents based on the contents instructed by the user. The display switching unit 23 may have various functions for improving the visibility of the graph, such as a function to enlarge, reduce, and change the scale of the graph, or a function to switch between displaying and hiding the graph. Note that the energy-saving effect display device 1 does not need to include the display unit 31. In this case, the graph creation unit 17 may display the graph on a display unit such as an external display.

[0038] Next, examples of graphs displayed by the display unit 31 will be described in detail with reference to Figures 4 and 5. The display unit 31 displays, for example, a graph G1 shown in Figure 4 and a graph G2 shown in Figure 5.

[0039] In the graph G1 of FIG. 4, the plot P1 shows the relationship between the "energy cost reduction amount" which is an example of the first improvement effect data, and the "CO2 emission reduction amount" which is an example of the second improvement effect data. The graph G1 is expressed in a matrix arrangement with the "energy cost reduction amount per month [yen]" in the column direction (horizontal axis) and the "CO2 emission reduction amount per month "t"" in the vertical direction (vertical axis). The "energy cost reduction amount" shows the difference between the estimated value D23 of the "energy cost" which is an example of the first non-implementation energy index, and the actual value D21 of the "energy cost" which is an example of the first implementation energy index. The "CO2 emission reduction amount" shows the difference between the estimated value D23 of the "CO2 emission amount" which is an example of the second non-implementation energy index, and the actual value D21 of the "CO2 emission amount" which is an example of the second implementation energy index.

[0040] As shown in graph G1, it can be seen that there is a negative correlation between "energy cost reductions" and "reductions in CO2 emissions." Specifically, the greater the "energy cost reductions," the smaller the "reductions in CO2 emissions." In other words, the greater the effect of energy-saving measures on "energy costs," the smaller the effect of those measures on "amount of CO2 emissions." Therefore, if the effect of energy-saving measures on "energy costs" is increased, the effect of those measures on "amount of CO2 emissions" will conversely be smaller. Also, if the effect of energy-saving measures on "amount of CO2 emissions" is increased, the effect of those measures on "energy costs" will conversely be smaller. In this way, it can be seen that there is a trade-off between "energy cost reductions" and "reductions in CO2 emissions."

[0041] Graph G1 also shows an approximation equation that approximates the relationship between "energy cost reduction" and "CO2 emission reduction" with a polynomial, and an approximation line L1 shown by the approximation equation. Approximation line L1 is a straight line obtained when approximating the relationship between "energy cost reduction" and "CO2 emission reduction" with a linear equation. In this way, when approximation line L1 is approximated with a linear equation, the relationship between "energy cost reduction" and "CO2 emission reduction" is quantitatively shown by the slope of approximation line L1. In the example shown in graph G1, the absolute value of the slope of approximation line L1 is 0.00089, so the "energy cost" per ton of "CO2 emission" can be converted to about 1,124 yen (≒1.0÷0.00089). This value can be used for investment decisions regarding reduction of CO2 emission. For example, when introducing energy equipment with low CO2 emissions, if the cost-effectiveness (i.e., investment cost divided by expected CO2 emissions) is 1,124 yen or less, investing in that energy equipment is appropriate from the perspective of reducing CO2 emissions. On the other hand, if the cost-effectiveness exceeds 1,124 yen, it would be more appropriate to change the current energy policy while placing emphasis on reducing CO2 emissions, rather than investing in that energy equipment.

[0042] In the graph G1, a straight line L2, which corresponds to the reciprocal of the CO2 price in the trading market [t / yen], is shown together with the approximation line L1. Since the straight line L2 shows the reciprocal of the CO2 price, the greater the slope of the straight line L2, the lower the CO2 price. Comparing the slope of the straight line L2 with the slope of the approximation line L1, the slope of the approximation line L1 is greater than the slope of the straight line L2, so it can be seen that the implementation of energy-saving measures makes it possible to reduce the amount of CO2 emissions at a price lower than the market price of CO2. From this result, it can be seen that the implemented energy-saving measures are effective in terms of reducing the amount of CO2 emissions. In this way, if there is information that is useful for evaluating the effectiveness of the energy-saving measures (for example, the approximation line L1 and the straight line L2), that information may be shown in addition to the graph G1.

[0043] On the other hand, in the graph G2 of FIG. 5, the plot P2 shows the relationship between the "energy cost reduction rate" which is another example of the first improvement effect data, and the "CO2 emission reduction rate" which is another example of the second improvement effect data. The graph G2 is represented by a matrix arrangement with the "monthly energy cost reduction rate [%]" in the column direction (horizontal axis) and the "monthly CO2 emission reduction rate "%"" in the vertical direction (vertical axis). The "energy cost reduction rate" shows the ratio between the estimated value D23 of the "energy cost" and the actual value D21 of the "energy cost". The "CO2 emission reduction rate" shows the ratio between the estimated value D23 of the "CO2 emission amount" and the actual value D21 of the "CO2 emission amount". The graph G2 does not show a correlation between the "energy cost reduction rate" and the "CO2 emission reduction rate". Note that, in the graph G2, information corresponding to the approximation line L1 and the straight line L2 may be shown together, as in the graph G1.

[0044] The display unit 31 may simultaneously display the graphs G1 and G2 side by side on one screen, or may display the graphs G1 and G2 separately on different screens. When the display unit 31 displays the graphs G1 and G2 separately on different screens, the display unit 31 may be configured to switch between the screens using a button or the like. The display unit 31 may display graphs other than the graphs G1 and G2. For example, the display unit 31 may display a graph showing the relationship between "reduction in energy usage" and "energy cost reduction", which are other examples of the energy index D2, or may display a graph showing the relationship between "reduction in energy usage" and "reduction in CO2 emissions". In this way, the type of energy index D2 shown in the graph is not particularly limited.

[0045] [How to display energy saving effects] Next, an energy-saving effect display method using the energy-saving effect display device 1 will be described with reference to Fig. 6. Fig. 6 shows an example of a procedure for using the energy-saving effect display device 1.

[0046] First, the user starts the energy-saving effect display device 1 (step S1). Next, the user sets extraction conditions for energy data D1 using the extraction condition designation unit 22 (step S2). Thereafter, the energy data D1 is extracted based on the set extraction conditions, and an energy index D2 is calculated based on the extracted energy data D1. Next, graphs G1 and G2 are created by the graph creation unit 17 based on the energy data D1 and the energy index D2, and the created graphs G1 and G2 are displayed on the display unit 31 (step S3). Thereafter, the user stops the energy-saving effect display device 1 (step S4).

[0047] 6, the energy-saving effect display device 1 is started and stopped every time the graphs G1 and G2 are displayed on the display unit 31, but once the energy-saving effect display device 1 is started, it does not have to be stopped unless there is a particular need. In this case, energy data D1 may be sequentially input to the energy-saving effect display device 1, and the graphs G1 and G2 created based on the energy data D1 may be redrawn on the display unit 31 at regular intervals (for example, every hour or every day). This type of configuration is particularly effective when the effects of energy-saving measures are displayed on a signage or large display.

[0048] [Hardware configuration] Next, the hardware configuration of the energy-saving effect display device 1 will be described with reference to FIG. 7. FIG. 7 is a diagram showing an example of the hardware configuration of the energy-saving effect display device 1. The energy-saving effect display device 1 includes one or more computers 100. The computer 100 has a CPU (Central Processing Unit) 101, a main memory unit 102, an auxiliary memory unit 103, a communication control unit 104, an input device 105, and an output device 106. The energy-saving effect display device 1 is configured by one or more computers 100 configured by these hardware and software such as programs. When the energy-saving effect display device 1 is configured by multiple computers 100, these computers 100 may be connected locally or may be connected via a communication network such as the Internet or an intranet. By this connection, one energy-saving effect display device 1 is logically constructed.

[0049] The CPU 101 executes an operating system, application programs, and the like. The main memory unit 102 is composed of a ROM (Read Only Memory) and a RAM (Random Access Memory). The auxiliary memory unit 103 is a storage medium composed of a hard disk, a flash memory, and the like. The auxiliary memory unit 103 generally stores a larger amount of data than the main memory unit 102. At least a part of each unit constituting the energy-saving effect display device 1 is realized by the auxiliary memory unit 103. The communication control unit 104 is composed of a network card or a wireless communication module. At least a part of each unit constituting the energy-saving effect display device 1 may be realized by the communication control unit 104. The input device 105 is composed of a keyboard, a mouse, a touch panel, and a microphone for voice input, and the like. For example, at least a part of the input interface 20 is realized by the input device 105. The output device 106 is composed of a display, a printer, and the like. At least a part of the output interface 30 is realized by the output device 106. For example, the output device 106 may display data output by the output interface 30 on a display, etc.

[0050] The auxiliary storage unit 103 stores the program 110 and data necessary for processing in advance. The program 110 causes the computer 100 to execute each functional element of the energy-saving effect display device 1. For example, the program 110 causes the computer 100 to execute the processing related to the above-mentioned steps S1 to S4. For example, the program 110 is read by the CPU 101 or the main storage unit 102, and operates at least one of the CPU 101, the main storage unit 102, the auxiliary storage unit 103, the communication control unit 104, the input device 105, and the output device 106. For example, the program 110 reads and writes data in the main storage unit 102 and the auxiliary storage unit 103. The program 110 may be provided after being recorded on a tangible recording medium such as a CD-ROM, a DVD-ROM, or a semiconductor memory. The program 110 may be provided via a communication network as a data signal.

[0051] [Effects] The effects of the energy-saving effect display device 1, the energy-saving effect display method, and the energy-saving effect display program described above will be described. In this embodiment, the graphs G1 and G2 are displayed on the display unit 31. The user can evaluate the effect of the energy-saving measures by referring to the displayed graphs G1 and G2. As described above, referring to the graph G1 in FIG. 4, it can be seen that the "energy cost reduction amount" and the "emission CO2 reduction amount" are in a trade-off relationship. From this result, the user can understand how the changes in the different types of energy indexes D2 affect each other. Specifically, the user can understand that the change in the "energy cost" affects the change in the "emission CO2", and specifically, that the greater the effect of the energy-saving measures on the "energy cost", the smaller the effect of the energy-saving measures on the "emission CO2 amount". In this way, the user can analyze in detail the factors of the change in the "energy cost" and the factors of the change in the "energy cost" from the result of the graph G1. As a result, the user can accurately evaluate the effect of the energy-saving measures. This enables the user to thoroughly consider the continuation of the energy-saving measures and the effect of investing in the energy-saving measures, based on the evaluation results of the energy-saving measures.

[0052] In this embodiment, graph G1 shows the relationship between "energy cost reduction amount" which is the difference between the estimated value D23 of "energy cost" and the actual value D21 of "energy cost", and "amount of CO2 emitted" which is the difference between the estimated value D23 of "amount of CO2 emitted" and the actual value D21 of "amount of CO2 emitted". In this case, the user can quantitatively grasp the relationship between "energy cost reduction amount" and "amount of CO2 emitted reduction", and therefore can analyze the factors of the change in "energy cost reduction amount" and the factors of the change in "amount of CO2 emitted reduction" in more detail. As a result, the user can more accurately evaluate the effect of the energy saving measures.

[0053] In this embodiment, the graph creation unit 17 displays the approximation line L1 together with the graph G1 on the display unit 31. In this case, the user can easily grasp the relationship between the "energy cost reduction amount" and the "CO2 emission reduction amount", which makes it easier to evaluate the effect of the energy saving measures.

[0054] [Variations] As described above, the present disclosure is not necessarily limited to the above-described embodiment, and various modifications are possible without departing from the gist of the present disclosure.

[0055] For example, in the above-described embodiment, the case where graphs G1 and G2 are displayed on the display unit has been described, but the improvement effect information displayed on the display unit is not limited to a graph format. For example, the improvement effect information may be shown in other data formats such as a table format, or may be shown as text including numerical descriptions of the improvement effect. Also, graphs other than graphs G1 and G2 may be displayed on the display unit. Also, the types of energy data are not limited to the above-described examples. For example, water may be considered as energy, and "water charges" and "water usage" may be included in the energy data.

[0056] In the above-described embodiment, the display unit may highlight only the plots corresponding to the current month (or day, week, hour, or year, depending on the embodiment) in each of the graphs G1 and G2 by coloring, etc. This makes it easier to understand the effect of energy saving in the most recent operation. Furthermore, the display unit may also display information on the uncertainty of the estimated value of the non-implementation energy index (for example, a width of ±3σ (standard deviation)) in each of the graphs G1 and G2.

[0057] In the above-described embodiment, the target facility has been mainly described as a factory, but the target facility may be a general commercial facility, a hospital facility, an accommodation facility, or a transportation facility. If the target facility is a commercial facility, the energy data may include floor area x business hours, and total working hours of employees. If the target facility is a hospital facility or an accommodation facility, the energy data may include the number of hospitalized patients and the number of overnight guests. If the target facility is a transportation facility, the energy data may include fuel consumption, transportation volume (e.g., weight of goods), transportation distance, and transportation time.

[0058] In the above-described embodiment, the energy-saving measures are not necessarily limited to organizational operation rules. For example, the energy-saving measures may be the introduction of a specific energy device or the modification of a control program. For example, when a charge / discharge program for a storage battery is modified, the energy-saving effect display device, the energy-saving effect display method, and the energy-saving effect display program according to the present disclosure can be used to evaluate the effect of the modification on the energy index of the entire factory, such as the operating cost.

[0059] Most energy-saving measures are aimed at reducing costs, and for example, in Patent Document 3, only costs are evaluated. However, in recent years, from the viewpoint of preventing global warming, companies are required to make further efforts to reduce CO2 emissions. In contrast, according to this embodiment, the improvement effect of energy-saving measures can be evaluated from multiple angles, not only in terms of costs but also in terms of CO2 emissions, and this contributes to Goal 13 of the Sustainable Development Goals (SDGs) led by the United Nations, "take urgent measures to mitigate climate change and its impacts." Therefore, the energy-saving effect display device 1, the energy-saving effect display method, and the energy-saving effect display program according to this embodiment are superior to Patent Document 3 and the like from this viewpoint as well. [Explanation of symbols]

[0060] 1. Energy saving effect display device 15 Energy Index Calculation Section (Calculation Section) 16 Energy index estimation unit (calculation unit) 17 Graph creation section (display control section) 23 Display switching unit (display control unit) 31 Display section 100 Computers D1 Energy data (actual data) D2 Energy Index (Index Data) D21 Energy indicator performance at the time of implementation (indicator data at the time of implementation) D22 Actual values ​​of energy indicators when not implemented (non-implementation indicator data) D23 Non-implementation energy indicators estimates (non-implementation indicator data) G1, G2 graph (improvement effect information) L1 approximation line

Claims

1. a calculation unit that calculates, based on performance data on past operating conditions of a target facility, first implementation-time index data and second implementation-time index data that are different in type and include information on energy usage conditions in the target facility when an energy-saving measure is implemented, and first non-implementation-time index data and second non-implementation-time index data that include information on energy usage conditions in the target facility when the energy-saving measure is not implemented and correspond to the first implementation-time index data and the second implementation-time index data, respectively; a display control unit that causes a display unit to display improvement effect information indicating a relationship between first improvement effect data that indicates an improvement effect due to the implementation of the energy-saving measure, the first improvement effect data being obtained based on the first implementation-time index data and the first non-implementation-time index data, and second improvement effect data that indicates an improvement effect due to the implementation of the energy-saving measure, the second improvement effect data being obtained based on the second implementation-time index data and the second non-implementation-time index data; An energy saving effect display device comprising:

2. the first improvement effect data is data indicating a difference between the first non-implementation index data and the first implementation index data, The energy-saving effect display device according to claim 1 , wherein the second improvement effect data is data indicating a difference between the second non-implementation index data and the second implementation index data.

3. 3. The energy-saving effect display device according to claim 1, wherein the display control unit causes the display unit to display an approximation equation that approximates a relationship between the first improvement effect data and the second improvement effect data together with the improvement effect information.

4. determining, based on performance data relating to past operating conditions of a target facility, first implementation-time index data and second implementation-time index data which are different in type from each other and which include information relating to energy usage conditions in the target facility when an energy-saving measure is being implemented, and first non-implementation-time index data and second non-implementation-time index data which include information relating to energy usage conditions in the target facility when the energy-saving measure is not being implemented and which correspond to the first implementation-time index data and the second implementation-time index data, respectively; displaying, on a display unit, improvement effect information indicating a relationship between first improvement effect data, which is obtained based on the first implementation-time index data and the first non-implementation-time index data and indicates an improvement effect due to the implementation of the energy-saving measure, and second improvement effect data, which is obtained based on the second implementation-time index data and the second non-implementation-time index data and indicates an improvement effect due to the implementation of the energy-saving measure; A method for displaying energy saving effects, including:

5. determining, based on performance data relating to past operating conditions of a target facility, first implementation-time index data and second implementation-time index data which are different in type from each other and which include information relating to energy usage conditions in the target facility when an energy-saving measure is being implemented, and first non-implementation-time index data and second non-implementation-time index data which include information relating to energy usage conditions in the target facility when the energy-saving measure is not being implemented and which correspond to the first implementation-time index data and the second implementation-time index data, respectively; displaying, on a display unit, improvement effect information indicating a relationship between first improvement effect data, which is obtained based on the first implementation-time index data and the first non-implementation-time index data and indicates an improvement effect due to the implementation of the energy-saving measure, and second improvement effect data, which is obtained based on the second implementation-time index data and the second non-implementation-time index data and indicates an improvement effect due to the implementation of the energy-saving measure; An energy saving effect display program that causes a computer to execute the above.

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