JP2004170310A - Energy management system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To individually and integrally monitor and judge energy using conditions of electricity, gas and the like in a building or the like, so as to save energy and to reduce an operation cost. <P>SOLUTION: A plurality of measuring means 6, 7, 8, 9 are provided to measure using amounts of energy media such as the electricity, the gas, oil and water supplied to loads, and a user side energy controller 1 blocks and regulates supply of the energy media to the loads, or outputs an alarm, when a measured data measured by the measuring means 6, 7, 8, 9 exceeds an energy saving target value preset based on an actual using result value in the past. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an energy management system for promoting energy saving of energy media such as electricity, gas, oil, and water.
[0002]
[Prior art]
The conventional measurement of energy consumption for the purpose of energy saving is mostly related to electric power. Specifically, only measurement of electric power consumption and maximum demand electric power (demand value) is performed. It is not possible to measure the amount of use of a single device for the purpose of energy saving.
[0003]
In addition, even if energy consumption (consumption) is measured and the measured values are recorded, most of the systems cannot compare with the past measured values. Has not been utilized.
[0004]
[Patent Document]
JP 2000-193695 A
[Problems to be solved by the invention]
As described above, most of conventional energy consumption measurement systems mainly measure energy consumption mainly of electricity and gas, and because there is no indication of the amount of money, it has not led to energy conservation education for energy managers. Is the fact. In promoting energy conservation activities as a national policy, not only energy managers but also all those who benefit from energy are required to participate, but a management system that considers energy conservation that is easy for everyone to understand has not yet been proposed.
[0006]
Particularly in buildings and factories that use a large amount of energy, utilities-related managers such as electricity are assigned. It is generally difficult to promote energy-saving activities, for example, because of the organizational division of the management office and cost management. At present, there has not been proposed any energy use state measurement system suitable for the purpose of energy saving. Similarly, no device has been proposed for comprehensively controlling the peak value of energy use.
[0007]
The present invention has been made in view of the above-described conventional problems, and individually and comprehensively monitors and determines the use state of energy such as electric power and gas in buildings, hotels, factories, and the like. Therefore, it is an object of the present invention to provide an energy management system capable of realizing energy saving and reduction of operation cost.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the energy system according to the first aspect of the present invention includes a plurality of measuring units that measure the amount of energy medium such as electricity, gas, oil, and water supplied to a load, and the measuring unit measures the amount of use. When the measured data exceeds an energy saving target value set in advance based on the past usage actual value, a user-side energy controller that shuts off or adjusts the supply of the energy medium to the load, or outputs an alarm, and carbon dioxide gas. It is characterized by having a monitoring center that predicts emissions and records and manages the results. This makes it possible to control the predetermined load so that the energy usage does not exceed the set target value while collectively managing the energy usage that changes over time in the user-side equipment, and therefore the energy consumption can be controlled. And the amount of carbon dioxide emission can be appropriately suppressed.
[0009]
An energy management system according to a second aspect of the present invention includes a monitoring center that receives measurement data through a communication line from a user-side facility including the measurement unit and a user-side energy controller, and the monitoring center is configured to perform monitoring based on the measurement data. The most economical contract method and energy-saving operation method for using the energy medium are selected and transmitted together with the energy consumption unit or the load characteristic data to the user equipment. As a result, it is possible to simultaneously and optimally realize energy saving and operation cost reduction of the user-side equipment, and reduction of carbon dioxide emission.
[0010]
Also, in the energy management system according to the invention of claim 3, the user-side energy controller calculates a usage fee for the usage amount of the energy medium based on the measurement data, and calculates an increase / decrease value and an excess value for the target value of the usage fee. It is characterized in that the shortage amount is calculated and output or printed out. This allows the user to perform an economical operation of user equipment associated with energy saving while referring to the display contents.
[0011]
Further, the energy management system according to the invention of claim 4 is provided with a temperature / humidity sensor or a carbon dioxide concentration sensor around the user-side equipment, and when these measured values exceed an upper limit or a lower limit of a preset target value. The user-side energy controller may cut off or adjust the supply of the energy medium to the load, or output an alarm. Thereby, the operating environment of the user-side equipment can be maintained efficiently and with energy saving.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the energy management system of the present invention. This energy management system includes a user-side facility A and a monitoring center B. The user-side equipment A is a user-side energy controller 1 serving as a user-side processing unit mainly composed of a CPU (central processing unit), and automatically controls each equipment machine under the user-side energy controller 1. A heat source system control unit 2, an air conditioning system control unit 3, an illumination system control unit 4, and a water supply / drainage system control unit 5. The user-side energy controller 1 calculates the amount of energy used by the user-side equipment A, and functions to determine whether or not the amount of energy used has exceeded a preset target value.
[0013]
In addition, the user-side energy controller 1 includes a power meter 6, a gas meter 7, a water meter 8, which is a measuring unit that measures each amount of power, gas, water, oil, etc. of the equipment including the control systems. An oil meter 9 is connected. Further, the user-side energy controller 1 is connected to a display 10 such as a CRT display for outputting various information such as a calculation result by the CPU as a text or an image, and a printer 11 for printing. Reference numeral 12 denotes a memory provided in the user-side energy controller 1 for storing various data, and 13 denotes a modem for modulating and demodulating various data input / output to / from the user-side energy controller 1.
[0014]
On the other hand, the monitoring center B makes the most economical contract for the use of the energy medium based on the measurement data measured by each of the meters 6 to 9 of the user-side equipment A or the output data of the user-side energy controller 1. A function and an energy-saving operation method are selected, and the function is transmitted to the user-side equipment together with the energy consumption unit, the carbon dioxide emission amount, or the load characteristic data. It also functions to predict carbon dioxide emissions and record and manage performance.
[0015]
The center-side energy controller 14 of the monitoring center B is provided with a memory 15 for storing various data such as the energy consumption unit and the load characteristic data, and a modem 16 for modulating / demodulating various information input / output to / from the user-side equipment A. Have been. Reference numeral 17 denotes a display such as a CRT display for displaying various information input / output to / from the center side energy controller 14, and 18 denotes a printer for printing out the various information. The user equipment A and the monitoring center B are connected via a communication line 19 such as a telephone line, a satellite communication circuit, and the Internet.
[0016]
In the energy management system having such a configuration, when the user equipment A in a building or the like is in the operating state, the measurement data of the power meter 6, the gas meter 7, the water meter 8, and the oil meter 9 are input to the user energy controller 1. Is done. The user-side energy controller 1 performs digital conversion processing of measurement data with its own data logger or pulse detector, performs pulse detection and counting, and processes the signal into a signal that can be processed by the CPU. Based on the processing signal, the amount of energy usage that changes every moment is calculated, and the calculation result is stored in the memory 12. Further, the user-side energy controller 1 periodically transfers stored data and the like to the monitoring center B via the modem 12 and the communication line 19.
[0017]
In addition, for the measurement of the energy consumption such as the electric power, various measuring methods conventionally used can be appropriately used. For example, the detected voltage and current may be converted into digital values, the average amount of power for each fixed time width determined by a microprocessor, and the power amounts integrated to obtain the energy consumption.
[0018]
Further, in the user-side energy controller 1, when the energy usage obtained based on the measurement data exceeds a preset target value, an alarm (not shown) may be used to generate an alarm, By operating any of the units 2 to 5, the load is cut off or adjusted, for example, the supply of electric power or gas is cut off or adjusted. Thereby, the energy consumption can be controlled to a predetermined value equal to or less than the target value.
[0019]
On the other hand, in the monitoring center B, various measurement data including the energy usage amount from the user side equipment A is input, and the measurement data is subjected to pattern analysis for each time unit of date and time, month, and year, The lowest cost and most efficient method of operating each equipment and the type of contract with the energy supply company are selected. Thereby, economic operation control of each equipment machine in the user equipment A can be performed.
[0020]
Also, by feeding back the result of the pattern analysis of the measurement data from the monitoring center B to the user-side equipment, when the facility manager is not present on the user-side equipment A side, or when the energy consumption exceeds the energy saving target value. In this case, an alarm signal or a cutoff signal is transmitted from the center-side energy controller 14 of the monitoring center B to the user-side energy controller 1 of the user-side facility A, so that an alarm is generated by the alarm device of the user-side facility A. It is possible to shut off or adjust the power or gas of each facility.
[0021]
FIG. 2 is a block diagram showing another embodiment of the user-side energy controller. In the figure, a user-side energy controller 21 includes a computer 22 and a wireless receiving circuit 23 connected to an antenna 29. The computer 22 includes a central processing unit 24, a memory 25, a display 26, a speaker (or buzzer) 27, A power supply circuit 28 for supplying a power supply voltage thereto is provided. Reference numeral 30 denotes a plug for connecting the external power supply circuit 28 to the user-side energy controller 21. The user-side energy controller 21 can be installed in the monitoring center B to have the same function as described above.
[0022]
Therefore, in the user-side energy controller 21 of the user-side facility A, when the CPU 24 receives the measurement signal from all or any of the meters 6 to 9, the user-side energy controller 21 refers to, for example, a charge conversion table of the usage amount extracted from the memory 25. For example, the charge data can be taken out and the necessary arithmetic processing can be performed to obtain the charge together with the energy consumption. In addition, the contents of the memory 25 are sequentially updated based on these pieces of measurement information.
[0023]
FIG. 3 shows a result-of-the-day screen C in which results of arithmetic processing performed by the CPU 24 of the computer 22 are graphically displayed on the display 26. Here, the time-dependent changes of the temperature and the power every 30 minutes are shown. In addition, each usage amount of gas, water, and the like can be similarly represented as time-lapse information every 30 minutes. By monitoring such a display screen, the operator, who is the manager, controls the heat source system control unit 2 to throttle or open the outside air damper, and controls the air conditioning system control unit 3 and the water supply / drainage system control unit 5 to control the refrigerant. Energy saving action can be taken by adjusting the opening of the vane or adjusting the cooling water temperature. It should be noted that, on the day result screen, the current energy usage and usage fee and the target values of the energy usage and usage fee as of today's date are displayed in parallel so that they can be compared.
[0024]
Although there is no particular limitation on the display method using the graph, the display period can be displayed for at least one unit period such as the current day result, the previous day result, the current month result, the year result, and when the unit period is plural. Can be switched and displayed.
[0025]
The types of graphs include a line graph and a bar graph. When displaying the actual value of the actual energy consumption and the target value of the energy consumption at the end of the integration using the bar graph, the target bar graph and the actual bar graph at the time of display are simultaneously displayed in parallel, and coloring is performed. By doing so, for example, the outline can be filled in, displayed side by side or superimposed, and the graph can be read quickly and easily.
[0026]
The performance bar graph may display the ratio of the actual energy amount to the target energy amount with a length that matches the ratio with the length of the target bar graph. For example, when the previous day's data and the current day's data are displayed in a superimposed manner, if the overhang is a red bar graph, the comparison is easy visually and energy saving measures can be taken promptly.
[0027]
When the energy consumption is displayed in a line graph, the line graph is expressed as a target integration amount from the start of integration to the end of integration in advance for the monitoring time zone, and the target line graph is displayed each time the integration result is obtained. Can be displayed in a manner rewritten as an actual line graph. Thereby, the display line graph is changed at the stage when the actual result is input, so that it is easy to compare the actual result with the target.
[0028]
A broken line between the target value and the actual value may be displayed in different colors, or may be displayed using a broken line such as a dotted line and a solid line so that the difference can be easily recognized. Further, the target line graph and the actual line graph may be displayed side by side. Further, the comparison result may be displayed in a color, a sound, a character, a symbol, a mark, a blinking display, or a combination thereof.
[0029]
The monitoring time period is a time period during which energy consumption becomes active in buildings, factories, and the like, and monitoring is required. During this time period, monitoring work is performed in parallel with energy use, such as by eliminating monitoring personnel. To be able to do The determination of the monitoring time zone is arbitrary, and may be appropriately determined according to the energy consumption situation. Usually, the demand time for determining the contract fee is 30 minutes for the electric power and 1 hour for the gas, so that the measurement and control may be performed in synchronism with the light-weight time period of the energy supply company.
[0030]
When displaying the energy consumption for each of the meters 6 to 9, a switching unit is provided to switch and display each energy consumption on one display unit 10. The energy saving target value is determined based on, for example, the type of contract power of the building and the type of gas contract.If there are multiple measuring units, consider the monitoring time zone, weekday, holiday, etc. Set the target value and upper limit value of After that, it will be changed considering actual results. In addition, displaying a fee is complicated by a contract with an energy supply company, a contract with a tenant, and the like, but a unit price is basically set arbitrarily.
[0031]
When using the wireless communication means, normal radio waves are used. However, the present invention is not limited to this, and it is possible to use the most appropriate transmission means based on the situation at the site, such as far-infrared rays or a wired system.
[0032]
Further, a temperature / humidity sensor or a carbon dioxide concentration sensor is provided around the user-side facility A, and when the measured value exceeds an upper limit or a lower limit of a preset target value, the user-side energy controller 1 loads the load. By shutting off the supply of the energy medium, adjusting or outputting an alarm, the deterioration of the surrounding environment can be avoided.
[0033]
FIG. 4 shows an alarm display screen D that is displayed on the display 10 when the energy usage or the usage fee is about to reach the target value during each control of the heat source, air conditioning, lighting, and water supply and drainage. Since the warning display screen D also displays energy saving measure manual information, the operator can set, for example, air conditioning, lighting, and water supply and drainage to optimal values by manual operation.
[0034]
In FIG. 4, by switching the screen for each type of energy, it is possible to display the current day results, the current month results, and the cumulative energy usage of the current year results, and these values exceed the energy saving target values. Is indicated on the bar graph as, for example, a black-painted portion P, so that the operator can be urged to take prompt measures, which can lead to enlightenment of the operator. In addition, by displaying the target value even on the day's results, it is possible to take care not to issue a warning every day, and the results of energy saving measures and enlightenment are accumulated.
[0035]
FIG. 5 shows a current month result screen E in which the result of the arithmetic processing performed by the CPU 24 of the computer 22 is displayed on the display 26. Here, the change of the gas for each day is shown. Here, the curve Q indicates the actual product of the same month in the previous year, and the curve R indicates the energy saving target value. Then, if the current month result of each month exceeds the target value as in the blacked portion S, an alarm is issued as described above or the heat source system control unit 2 or the like is operated to suppress the gas usage. I do. By superimposing and displaying the actual value and the target value in this way, the relative relationship between the actual value and the target value becomes clear, and optimal control of the gas usage by the operator's manual can be easily and accurately realized.
[0036]
Similarly, year results can also be displayed on a screen in units of each year. In this case, the 13 months of the current month are always displayed, and when a new month is entered, the measured value of the oldest month is deleted and the current month is deleted. And the past 13 months, including the same month last year, can be compared.
[0037]
As described above, the user-side energy controller 1 allows the operator (manager) to grasp all the energy used in the building or the like, and to promptly determine the cause of the energy consumption and take necessary countermeasures. This can greatly contribute to resource conservation and reduction in equipment operating costs.
[0038]
【The invention's effect】
As described above, according to the present invention, when the measurement data obtained by measuring the usage amount of the energy medium by the measurement unit exceeds the energy saving target value set in advance based on the past usage amount actual value, The controller controls the supply of energy medium to the load to be cut off or adjusted, or outputs an alarm, and the monitoring center performs prediction and record / manage of carbon dioxide emissions. While collectively managing the changing energy usage, the operation of the user measurement equipment can be controlled so that the energy usage does not exceed the set target value, and thus the total amount of energy consumption can be appropriately suppressed.
[0039]
Also, a monitoring center is provided to allow the user to select the most economical contract method and energy-saving operation method for use of the energy medium based on the measured data, and to transmit the data to the user-side equipment together with the energy consumption unit or the load characteristic data. Thus, it is possible to simultaneously and optimally realize the energy saving and the reduction of the operation cost of the user side equipment. Further, the user-side energy controller causes the usage fee for the usage amount of the energy medium to be calculated based on the measurement data, and obtains an increase / decrease value and a surplus / deficiency amount with respect to a target value of the usage fee, and causes the output display or the printout. Thus, the user can realize an economical operation of user equipment associated with energy saving while referring to the display contents.
[0040]
Further, a temperature / humidity sensor or a carbon dioxide gas concentration sensor is provided around the user-side equipment, and when the measured value exceeds an upper limit or a lower limit of a preset target value, the user-side energy controller sets an energy medium for the load. By shutting off or adjusting the supply of power, or outputting an alarm, the operating environment of the facility on the user side can be optimally maintained.
[Brief description of the drawings]
FIG. 1 is a block diagram conceptually showing an energy management system according to an embodiment of the present invention.
FIG. 2 is a block diagram showing another embodiment of the user-side energy controller in FIG. 1;
FIG. 3 is an explanatory view showing a power consumption amount day result screen according to the present invention;
FIG. 4 is an explanatory view showing a warning screen for power consumption and a manual screen for measures according to the present invention.
FIG. 5 is an explanatory diagram showing a current month result screen of gas usage according to the present invention.
[Explanation of symbols]
A User equipment B Monitoring center 1 User energy controller 6 Electricity meter (measuring means)
7 Gas meter (measuring means)
8 Water meter (measuring means)
9 Oil meter (measuring means)
10 Display 11 Printer 19 Communication line

Claims (4)

A plurality of measuring means for measuring the amount of use of an energy medium such as electricity, gas, oil, and water supplied to a load;
When the measurement data measured by the measuring means exceeds an energy saving target value set in advance based on a past usage actual value, the user side energy for shutting off or adjusting the supply of the energy medium to the load or outputting an alarm. A controller,
A monitoring center that predicts carbon dioxide emissions and records and manages the results.
An energy management system comprising: A monitoring center for receiving measurement data through a communication line from a user-side facility including the measurement unit and a user-side energy controller is provided. The monitoring center is configured to provide the most economical contract method and energy saving for the use of an energy medium based on the measurement data. 2. The energy management system according to claim 1, wherein an operation mode is selected and transmitted to the user-side facility together with energy intensity or load characteristic data. 3. The user-side energy controller calculates a usage fee for the usage amount of the energy medium based on the measurement data, and obtains an increase / decrease value and an excess / deficiency amount with respect to a target value of the usage fee, and performs output display or printout. The energy management system according to claim 1, wherein A temperature / humidity sensor or a carbon dioxide gas concentration sensor is provided around the user-side equipment, and when the value measured by these temperature / humidity sensor or carbon dioxide gas sensor exceeds an upper limit or a lower limit of a preset target value, the user energy The energy management system according to claim 1, wherein the controller cuts off or adjusts the supply of the energy medium to the load or outputs an alarm.

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