JP2014054163A - System of managing energy in industrial facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an energy management system based on a new concept, which stratifies and graphically presents energy flows to enable the energy flows to be easily checked layer by layer.SOLUTION: A system of managing energy in an industrial facility has: a function of displaying, on a monitor unit, energy flows in the industrial facility; a function of displaying, on the monitor unit, branching proportions in cases of branching of energy in the energy flows; a function of displaying, on the monitor unit, energy conversion efficiency in the energy flows; and a function of displaying, on the monitor unit, information representing the energy state.

Description

  The present invention relates to a system for managing energy in an industrial facility such as a building or factory, and provides visual information by displaying energy hierarchically, and analyzes data relating to energy displayed hierarchically. This optimizes the amount of energy used.

  Energy systems in factories and buildings are large and complex, and various equipment is operating. Therefore, it is not easy to execute energy management of facilities having these energy systems, and there is a problem that it is difficult to present a specific implementation method.

JP 2004-302889 A

  The energy systems of factories and buildings are large-scale and it is difficult to grasp complex energy phenomena. In addition, since individual characteristics are included in factories and buildings and many people are involved, there is a problem that it is difficult to recognize the energy situation in common. There is a need to introduce a new energy management system for efficiently managing the energy of large and complex industrial facilities such as factories and buildings.

  In order to solve the above problems, an object of the present invention is to provide a new concept energy management system capable of hierarchically stratifying energy flows and visually confirming the hierarchical energy flows. The second object is to provide a new concept energy management system that displays energy efficiency corresponding to hierarchical energy flows.

  Third, through a correlation analysis of energy reduction effects, a new concept energy management system is provided to visually grasp the point of highest energy efficiency, comprehensively considering the interrelationship with other energy systems. It is another object of the present invention.

  The system of the present invention is a system for managing the energy of an industrial facility, the function of displaying an energy flow in the industrial facility on a monitor unit, and a branching ratio when energy is branched in the energy flow. And a function of displaying energy conversion efficiency in the energy flow on the monitor unit, and a function of displaying information representing the energy state on the monitor unit.

  The system further has a function of evaluating relevance of different energies and displaying them on the monitor unit.

  The energy flow has a hierarchical structure, and is a summary of energy input, output, disposal, exhaust, and exhaust heat of the equipment of the industrial facility. The energy flow further includes the type and amount of the energy. And at least one of energy information consisting of branching ratio, equipment efficiency of the equipment, temperature, and pressure as visual information, displayed on the monitor unit based on a predefined display rule, and changing in units of time It is displayed on the monitor unit corresponding to the energy information.

  The efficiency of the energy conversion is displayed on the monitor unit corresponding to the hierarchical energy flow.

  For the display of the energy amount and the branching ratio, the primary energy that is the purchased energy and the secondary energy that is the final consumed energy are simultaneously displayed on the monitor unit, and the primary energy uses the energy information displayed by the energy flow. Are sequentially converted from the measured secondary energy and displayed on the monitor unit.

  Regarding the energy and the efficiency of the energy conversion, a state in a certain period and a transition of the certain period are displayed on the monitor unit, and comparison data compared with other data is also displayed on the monitor unit.

  The energy and the efficiency of the energy conversion are respectively displayed on the monitor unit as a graph or a table according to a display period or a display item.

  It has a database in which the amount of energy, the energy conversion efficiency, and the type of data to be acquired in order to obtain information on the energy state, the definition formula and the measurement frequency are organized and stored for each energy flow hierarchy Yes.

  As an energy management function, simulation can be performed based on data, and the result of the simulation is matched with the display screen of the energy flow, the energy conversion efficiency, and the energy state, and between the energy types. Are displayed on the monitor unit in accordance with a screen of a function for evaluating the relevance.

  In the energy reduction effect correlation analysis screen, which is a relationship analysis screen of the types of energy displayed on the monitor unit, the energy consumption of the equipment according to the numerical change of the parameter to be controlled is displayed in a graph, The total energy consumption of all the equipment is also displayed in a graph at the same time, so that the place where the overall energy consumption is minimum can be visually recognized.

  The system of the present invention is a system for managing the energy of an industrial facility, the function of displaying the energy flow in the industrial facility on a monitor unit, and the branching ratio when energy is branched in the energy flow in the monitor unit. By having a function of displaying, a function of displaying energy conversion efficiency in the energy flow on the monitor unit, and a function of displaying information representing the energy state on the monitor unit, the energy flow is hierarchized. It can be presented graphically and the energy flow can be checked by layer.

  The energy flow has a hierarchical structure, and is a summary of energy input, output, disposal, exhaust, and exhaust heat of the equipment of the industrial facility. The energy flow further includes the type and amount of the energy. And at least one of energy information consisting of branching ratio, equipment efficiency of the equipment, temperature, and pressure as visual information, displayed on the monitor unit based on a predefined display rule, and changing in units of time By displaying on the monitor unit corresponding to the energy information, the user can easily analyze.

  In the energy reduction effect correlation analysis screen, which is a relationship analysis screen of the types of energy displayed on the monitor unit, the energy consumption of the equipment according to the numerical change of the parameter to be controlled is displayed in a graph, The total energy consumption of all the aforementioned equipment is also displayed in a graph at the same time, and it is easy for the user to minimize the overall energy consumption by making it possible to see where the overall energy consumption is minimized. Can be confirmed.

  As an energy management function, simulation can be performed based on data, and the result of the simulation is matched to the display screen of the energy flow, the energy conversion efficiency, and the energy state, and between different energies. By displaying on the monitor unit in accordance with the screen of the function for evaluating the relevance of the energy, it becomes possible to manage energy more effectively and systematically in an industrial facility such as a factory.

This is a visualization and graph of the energy flow of the entire factory displayed on the monitor screen. This is a visualization and graph of the energy flow of the entire factory displayed on the monitor screen. The energy flow that exists in the monitor section is divided into the energy consumption of the entire factory, the energy consumption of each line belonging to each organization (system) in the factory, and the energy consumption consumed by individual equipment belonging to that organization. And the state where the screen transitions according to the user's selection. The energy flow analysis screen shows that the transition to the analysis and management screen can be made according to the user's selection. The energy efficiency analysis screen for the entire plant, for each line, and for each device is displayed for each layer of the energy flow analysis. Indicates that it will be provided. It is a specific example of an analysis and management screen of energy transition, and a graph corresponding to a display period and a display item is shown. Indicates that the system will move to the important management point analysis screen by analyzing the trend and selecting the user on the management screen It is a screen display of the operating efficiency analysis graph of the refrigerator shown as an Example on important control point analysis. It is a screen display of the analysis graph of the operating state of the refrigerator shown as an Example on important control point analysis. It is a correlation analysis graph of energy. It is a graph which shows the other example of the correlation analysis graph of energy. It is a graph which shows another example of the correlation analysis graph of energy. It is a figure which shows the structure and measurement point of a refrigerator system. The measurement points, specific measurement items, and list of each device of the refrigerator system are displayed. A list of data items required for evaluation is displayed. This is a list of evaluation indices, definition formulas, measurement intervals, counting methods, and counting intervals of measurement target devices. The figure shows the linkage between the energy management system and various simulations. The flow of a load prediction system is illustrated. 1 illustrates the concept of a load prediction system.

  Hereinafter, specific embodiments of the present invention will be described in more detail with reference to the accompanying drawings. The present invention relates to a system for managing energy of an entire industrial facility such as a factory or a building.

  An apparatus for detecting energy consumption of various equipment that consumes energy in real time is composed of various types of sensors.

  The present invention is a system for managing energy in an industrial facility, and displays a function for displaying an energy flow in the industrial facility on a monitor unit and a branching ratio when energy is branched in the energy flow on the monitor unit. A function, a function of displaying energy conversion efficiency in the energy flow on the monitor unit, and a function of displaying information representing the energy state on the monitor unit.

  In the present invention, energy types are defined as follows. Primary energy refers to purchased energy, and examples of primary energy include purchased power (high voltage power such as 6600 V), city gas, heavy oil, and the like. Secondary energy refers to energy obtained by converting purchased energy with equipment. Examples of secondary energy include electric power (100V, 200V and other high-voltage power converted into low-voltage power by a transformer), cold water (electric power or city Gas converted into cold water energy with a refrigerator), hot water (electric power or city gas converted into hot water energy with a boiler, etc.), steam (electric power or city gas converted into steam energy with a boiler, etc.) ).

  The information obtained when collecting energy consumption is sent to the energy management server part of the energy management system and used for energy analysis. When collecting power consumption, only the energy consumption of equipment is detected. It does not detect the operating conditions (temperature, pressure, humidity, operating time, etc.). Further, the energy consumption includes all types of energy consumption such as electric power and gas usage.

  For example, when collecting the electric energy of the refrigerator, the operating state (operation or stop) of the refrigerator, the temperature of the inlet and outlet, etc. are collected. When collecting the electric energy of the compressor, the compressor operation is collected. When collecting data such as status (operation or shutdown), load factor (load / unload / load rate), pressure, temperature, etc., and collecting boiler energy, the energy of equipment (fan / pump) The fuel consumption of the boiler, the operating state (running or shutting down), load factor, surface temperature, steam flow, steam temperature, steam pressure, combustion air volume, combustion temperature, exhaust gas temperature, residual oxygen concentration, etc. are collected.

  The energy management server calculates the energy consumption obtained from the energy collector, calculates the energy consumption of various equipment and the energy consumption of the entire facility, and stores it. Furthermore, the function which produces | generates the equipment-equipment performance coefficient (COP and efficiency) using the information regarding the operating conditions and energy consumption sent from the energy management server part, input energy, and the converted output energy is performed.

  The energy management server also supports a function of issuing a control command so that various graphs, letters, numbers, and the like that allow the monitor unit to be visually confirmed as a whole are displayed on the screen.

  These energy management servers collect various information in real time and include a database (DB) for storing data. The database stores data arranged for each hierarchy corresponding to the energy flow.

  Measurement items / frequency / calculation formulas (see FIGS. 11 to 15) necessary for displaying the energy flow on the screen correspond to each energy flow, and are stored in the energy management system as a database. If the flow changes due to this, the measurement specifications (measurement accuracy, measurement frequency, etc.) change, the measurement item is added or deleted, etc., the screen display contents should be changed and corrected promptly. Can do.

  FIG. 11 shows a configuration of the entire system of the refrigerator system, and the refrigerator system includes a refrigerator, a cold water pump, a cooling tower, a cooling water pump, and the like. FIG. 12 is a list of measurement points and measurement items of the refrigerator, the cold water primary pump, the cooling tower, and the pre-cooling water pump, and a list of measurement items of the outside air. Evaluation is based on this list. The table shown in FIG. 13 is a list of data items necessary for the above. FIG. 14 shows a list of evaluation indexes, definition formulas, measurement intervals, counting methods, and counting intervals of measurement target devices, all of which are stored in the database.

  The monitor unit plays a role of displaying the energy consumption of each grid calculated by the energy management server, the total energy consumption and the graph that can be visually recognized by the data and control commands sent from the energy management server in letters or numbers. Plays.

  A graphical user interface (GUI) is displayed on these monitor units.

  The input unit executes a function of selecting a GUI element displayed on the monitor unit or inputting a command. These executions are performed when a general PC keyboard or mouse is connected and by a GUI element displayed on the touch screen.

  As shown in the left area of Fig. 1 (a), the graph displayed on the monitor section shows the energy for each system (divided into refrigerator system, compressor system, boiler system, etc.) from the total energy supplied. It is displayed in a hierarchy so as to branch to a size corresponding to the proportion of consumption. Therefore, the entire energy flow can be visually grasped for each system of equipment.

  Furthermore, different colors are displayed for each energy type, and power consumption is displayed in green, LNG in brown, cold water in blue, steam in pink, and hot water in orange.

  FIG. 1B shows a basic example of energy flow.

  In FIG. 1B, the bar 1 extending from the left to the right displays the energy flow, and the energy flow is displayed so as to flow from the left to the right.

  The widths of these bars are displayed in accordance with the ratio of each energy amount, with the maximum energy in the energy flow being 100% in order to display the energy amount. If the energy flow is relatively small so that the energy flow cannot be represented on the screen, or the line when the energy amount is “0”, the minimum line width is set and displayed.

  Box 2 shown in FIG. 1 (b) represents equipment, the bar-shaped line on the left of box 2 indicates the energy input, and the bar-shaped line on the right of box 2 indicates the energy input. Display output. Further, the ratio of the fluctuation of the width of the left bar-shaped line and the right bar-shaped line indicates the conversion efficiency of various energy.

  In FIG. 1B, reference numeral 3 indicates the equipment system represented by a box, the heat from the equipment and its temperature. If there is no temperature indication, it means that there is no heat exhausted by the shutdown of the equipment.

  Reference numeral 4 in FIG. 1B is for displaying the type and temperature of heat recovery. If there is no temperature display, it means that there is no heat recovery in the device.

  Further, the monitor unit displays, in the right area of FIG. 1A, an integrated energy additive graph for each energy branch system, an integrated energy comparison graph for each branch system, and an integrated energy composition ratio graph for each branch system.

  The graph shown on the right area of FIG. 1A is an integrated energy graph for each branch system. By calculating the energy consumption for each system by the energy management server in units of days, months, and years, It is described so that the calculated integrated energy for each quarter system can be visually recognized. The integrated energy graph for each branch system is displayed for each month, and the tendency of the integrated energy for each month can be visually confirmed.

  The graph in the center of the area on the right side of Fig. 1 (a) is a comparison graph of the integrated energy for each branch system. The integrated energy for each branch system calculated by the energy management server and the branch system for the previous day, the previous month, or the previous year. It is described so that it can be visually recognized by comparing each integrated energy. The change of the integrated energy can be visually confirmed by the integrated energy comparison graph for each branch system.

  The graph in the lower part of the right region in FIG. 1A is an integrated energy composition ratio graph for each branch system so that the percentage of the integrated energy for each branch system can be visually recognized. These accumulated energy composition ratio graphs for each branch system can visually confirm the change in the composition ratio of the accumulated energy for each branch system by presenting the composition ratio of the previous month or the previous year.

  Fig. 2 shows that the energy flow existing in the monitor section is divided into the energy consumption of the entire factory, the energy consumption of each line belonging to each organization of the factory, and the energy consumption consumed by each equipment device belonging to each line It is displayed and indicates a state in which the screen is switched according to the user's selection.

  In the example of the factory displayed on the monitor, when a branch destination graph is selected, a graph that branches to a size corresponding to the proportion of energy consumption of the line belonging to each organization of the factory is displayed. Energy flow can be grasped visually.

  To select a branch graph, touch the graph on the touch screen to select it. Otherwise, move the mouse cursor to select the graph, or use the command to specify the keyboard graph. Selected when entered.

  Furthermore, when a graph that branches for each line displayed on the monitor section is selected, it is displayed on a graph that branches to a size corresponding to the proportion of energy consumed by the individual equipment included in that line. It is possible to visually grasp the energy flow of each individual equipment.

  That is, it is displayed in a hierarchical manner so that the energy flow of individual equipment (such as a refrigerator, a compressor, and a boiler) can be easily confirmed from the energy flow of the entire factory or building.

  When the energy flow analysis screen shown in FIG. 3 indicates that it is possible to shift to a trend analysis and management screen according to the user's selection, depending on the layer of energy flow analysis, the organization in the factory, the line of each organization, and the individual Indicates that a business trend analysis management screen is provided for each equipment.

  When the screen switching menu displayed on the monitor unit is selected or a screen switching command is input, the monitor analyzes the trend for energy efficiency analysis and switches to the management screen.

  That is, when the screen for analyzing the energy flow of the entire factory is displayed, select the screen switching menu or enter the screen switching command to switch to the trend analysis and management screen unique to each organization in the factory. If the screen switching menu is selected or the screen switching command is entered when the screen for analyzing the energy flow is displayed for each line belonging to the organization, the screen changes to the trend analysis and management screen for each line. Then, when the screen for analyzing the energy flow of individual equipment is displayed, select the screen switching menu or enter the screen switching command to analyze and manage the trend of individual devices. Switching to is performed.

  The energy transition analysis and management screen is roughly divided into three areas, and the three graphs placed in the upper left, middle left, and lower left of FIG. The two graphs arranged in the upper part of the center and the upper right part of FIG. 4 are the second areas for evaluating the energy efficiency, and are arranged in the right central part and the lower right part of FIG. One graph is the third region.

  The graph displayed in the upper part of the first area is a graph for confirming the energy amount for comparing the time-series usage amounts of input and output of the monthly accumulated energy.

  The graph displayed in the center of the first area is a graph that compares the usage patterns of daily input and output energy. When you select the point data displayed in the graph, a part of the data is displayed in a pop-up. The

The graph displayed at the bottom of the first region is a graph for comparing the amount of daily input / output energy used and confirming the energy trend.

  The graph displayed on the left side of the second area is for displaying the time series of monthly average and daily average efficiency, and the graph displayed on the right side is a graph that refers to the daily average efficiency pattern. When the point data displayed on the graph that refers to the pattern is selected, a part of the data is displayed in a pop-up.

  The graph displayed in the third area is a time series graph showing the amount of cold and the refrigerator efficiency (COP) corresponding to the amount of cold.

  Each region can switch a display period, and can select an arbitrary display period.

  FIG. 5 shows that the user is moved to the important management point analysis screen according to the selection of the user on the management screen.

  That is, when a screen switching menu displayed on the monitor unit is selected or a screen switching command is input, the monitor unit can move to the important management point analysis screen.

  There is a screen to analyze the transition, the previous day of the management screen, the previous month, or the energy and energy usage patterns of the previous year, and extract concerns and improvements, and the screen at the time of important management point analysis is the system Analyze critical control points for high-efficiency and normal operation of systems and equipment, and extract problems and improvements using special graphs for analysis of items based on individual attributes of equipment and equipment Can do.

  FIG. 6 is a graph showing an operating parameter analysis of the refrigerator as a specific example of the important control point analysis.

  The graph displayed in the upper left of FIG. 6 displays data on the refrigerator COP and the load factor, and shows the relationship between the refrigerator load factor and the COP.

  The graph displayed on the left and bottom of FIG. 6 shows the load factor and COP of the chilled water outlet temperature scale in which the COP of the refrigerator is displayed along the chilled water outlet temperature. The case where the temperature of the water is 26 to 27 ° C is shown, and the lower graph shows the case where the temperature of the cooling water is 28 to 29 ° C, and the COP of the refrigerator is expressed by the cold water outlet temperature.

  The graph displayed in the upper right of FIG. 6 is obtained by performing discrete tabulation processing on the COPs of individual refrigerators based on the load factor, and assuming that the cooling water temperature is 28 ° C. and the cooling water temperature is 6 ° C. It is displayed.

  The graph displayed in the middle section on the right side of FIG. 6 is obtained by discretely counting the COPs of individual refrigerators according to the temperature of the cooling water. The conditions for the cold water temperature of 6 ° C. and the load factor of 0.6 are shown. It is displayed.

  The graph displayed in the lower right of FIG. 6 is obtained by performing discrete tabulation processing on the COPs of individual refrigerators based on the chilled water outlet temperature, and the cooling water temperature is 28 ° C. and the load factor is 0.6. In this case, the COP of the refrigerator is displayed by discrete tabulation processing based on the cold water outlet temperature.

  FIG. 7 is an analysis graph of the operation control of the refrigerator shown as a specific example on the important control point analysis.

  The graph displayed in the upper left of FIG. 7 is a graph displayed in time series by accumulating the heat generated by each cooler.

  The graph displayed in the middle left part of FIG. 7 is a graph displaying the total number of operating refrigerators and devices in time series.

  The graph displayed in the lower left of FIG. 7 displays the load factor of the refrigerator, and is a time series graph of the load factor.

  The graph displayed in the upper right of FIG. 7 is a graph in which the amount of generated heat of each refrigerator is integrated and displayed in time series in descending order of the total generated heat.

  The graph displayed in the middle right part of FIG. 7 is a graph showing the transition of the cumulative operation time of the month displaying the monthly integrated operation time in the refrigerator.

  The graph displayed in the lower right of FIG. 7 is a graph displaying an operating time distribution for each load factor of the refrigerator and an integrated operating time curve for each load factor of the refrigerator.

  FIG. 8 is an energy correlation analysis graph. When the screen switching menu displayed on the monitor is selected by the input unit or when a screen switching command is input, the monitor switches to the correlation analysis screen of the energy reduction effect. .

  On the screen of correlation analysis of energy reduction effect displayed on the monitor section, a graph of energy consumption of related equipment accompanying changes in the value of the parameter to be controlled is displayed, but the energy consumption of these equipment Is displayed on the graph, and the point where the total energy consumption is minimum can be visually confirmed.

  Some energy reduction measures often have conflicting effects. For example, a decrease in the temperature of the cooling water contributes to increasing the efficiency of the refrigerator, but the power consumption and cooling water required for cooling are low. Will increase the energy used in the heating system.

  In the correlation analysis of the energy reduction effect, it is used for the purpose of comprehensively examining and evaluating the influence on such other systems. In the case of FIG. 8, the temperature of the cooling water is optimal. Graphs of energy consumption consumed by LT refrigerators, HT refrigerators, compressors, cooling towers, and steam boilers that are affected by changes in cooling water temperature are displayed. By displaying the total energy consumption of the facility equipment in the graph, the temperature of the cooling water for minimizing the overall energy consumption can be visually confirmed. In the case of FIG. 9, a graph of the energy consumption consumed by the LT refrigerator, cooling tower and steam boiler accompanying the temperature change of the cold water is displayed, and the total energy consumption of these equipment is displayed in the graph As a result, the cold water temperature for minimizing the overall energy consumption can be visually confirmed. In the case of FIG. 10 as well, the energy consumed in the refrigerator, steam boiler and cooling tower due to changes in the outside air temperature. The consumption energy graph is displayed, and the total energy consumption of these equipment is displayed in the graph, so that the outside air temperature for minimizing the overall energy consumption can be visually confirmed. .

  As described above, specific embodiments of the present invention have been described with reference to the accompanying drawings. However, the scope of the present invention is not limited to these embodiments, and the technical points of the present invention are not limited thereto. It is clear that the present invention is also within the scope of the present invention even when there are many other interrelated energy effects without change.

  The energy management system of the present invention can perform a simulation based on data stored in a database as an energy management function. The simulation result is matched with the display screen of the energy flow, the efficiency of the energy conversion, and the state of the energy, and according to the screen of the function for evaluating the relation between different energies. It is also possible to display on the section.

  The simulation is performed using a simulation tool. The simulation tool includes, for example, a load prediction system (see FIGS. 16 and 17), an optimum operation analysis system, and an external air conditioning coil analysis. The load prediction system predicts the outside air load and the internal load from the forecast value of the weather conditions of the next day and the schedules of the equipment and occupants. The optimum operation analysis system analyzes the CO2 emission amount or the energy cost minimization condition from the time-specific chilled water load data, the operation performance characteristic data of each heat source unit, and the energy unit price. The outside air conditioner (OAC) coil analysis is a system that simulates the OAC air-conditioning process and supports the minimization of the energy consumption of the entire OAC while maintaining the air blowing conditions.

  As shown in FIG. 15, each simulation tool performs each simulation based on data output from the database of the energy management system or data obtained separately. The simulation results are fed back to the energy management system for analysis and display.

  By performing the simulation as described above, it becomes possible to manage energy more effectively and systematically in an industrial facility such as a factory.

1 Bar indicating energy flow 2 Box indicating household appliances / equipment 3 Heat and temperature from equipment 4 Heat recovery type and temperature

Claims (10)

A system for managing energy in industrial facilities,
A function of displaying the energy flow in the industrial facility on a monitor unit;
A function of displaying a branching ratio when energy is branched in the energy flow on the monitor unit;
A function of displaying the efficiency of energy conversion in the energy flow on the monitor unit;
And a function of displaying information representing the energy state on the monitor unit.   The system according to claim 1, further comprising a function of evaluating relevance of different energies and displaying on the monitor unit. The energy flow has a hierarchical structure, and is a summation of energy input, output, disposal, exhaust and exhaust heat of the equipment of the industrial facility,
The energy flow is further based on a display rule defined in advance using at least one of energy information including the type, amount, branching ratio, equipment efficiency, temperature, and pressure of the equipment as visual information. The system according to claim 1, wherein the system is displayed on the monitor unit in correspondence with the energy information displayed on the monitor unit and changing in units of time.   The system according to any one of claims 1 to 3, wherein the efficiency of the energy conversion is displayed on a monitor unit corresponding to a hierarchical energy flow. In the display of the energy amount and the branching ratio, the primary energy that is the purchased energy and the secondary energy that is the final consumed energy are displayed on the monitor unit at the same time,
The said primary energy is sequentially converted from the said secondary energy measured using the said energy information displayed by the said energy flow, and is displayed on a monitor part, The any one of Claims 1-4 characterized by the above-mentioned. The system described in.   The energy and the efficiency of the energy conversion are characterized in that a state in a certain period and a transition of the certain period are displayed on the monitor unit, and comparison data compared with other data is also displayed on the monitor unit. 6. The system according to any one of 5 above.   The system according to claim 5, wherein the energy and the efficiency of the energy conversion are displayed on the monitor unit as a graph or a table corresponding to each display period or display item.   It has a database in which the amount of energy, the efficiency of the energy conversion, and the type of data to be acquired to obtain information on the energy state and the measurement frequency are organized and stored for each energy flow hierarchy The system according to claim 1, characterized in that it is characterized in that   As an energy management function, simulation can be performed based on data, and the result of the simulation is matched to the display screen of the energy flow, the energy conversion efficiency, and the energy state, and between different energies. 3. The system according to claim 1, wherein the system is displayed on the monitor unit in accordance with a screen of a function for evaluating the relevance of the system.   In the energy reduction effect correlation analysis screen, which is a relationship analysis screen of the types of energy displayed on the monitor unit, the energy consumption of the equipment according to the numerical change of the parameter to be controlled is displayed in a graph, The system according to claim 2, wherein a total energy consumption amount of all the facility devices is simultaneously displayed in a graph so that a portion where the overall energy consumption amount is minimum can be visually recognized.