JP2011186570A - Calculation device for carbon dioxide emission amount - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a calculation device for a carbon dioxide emission amount, allowing investigation of a reduction method for the carbon dioxide emission amount by calculating and analyzing the carbon dioxide emission amount derived from both a production facility and a utility facility to reduce the carbon dioxide emission amount. <P>SOLUTION: The calculation device for the carbon dioxide emission amount includes: a measurement value collection part 1 collecting measurement values that are operation information of the facilities from the production facility and the utility facility; an emission amount calculation part 2 calculating the carbon dioxide emission amount from facility specifications of the measurement values collected in the measurement value collection part 1; a data analysis part 3 analyzing the carbon dioxide emission amount calculated in the emission amount calculation part 2; a data storage part 4 storing the collected measurement values, the calculated carbon dioxide emission amount, and an analysis result obtained by the analysis; and a display part 5 displaying data stored in the data storage part 4. The data analysis part 3 calculates and compares the carbon dioxide emission amount derived from energy consumed in the production facility and the carbon dioxide emission amount derived from energy produced in the utility facility. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention is used for manufacturing management for the industrial field, and in order to reduce the amount of carbon dioxide emitted at the time of product production, the amount of carbon dioxide emissions that can be grasped for each facility and each product to be improved It is related with the calculation apparatus.

  In recent years, there is concern that an increase in greenhouse gases such as carbon dioxide and methane in the atmosphere will warm the earth and that natural ecosystems will be adversely affected by global warming. For this reason, laws and regulations for reducing greenhouse gases are being strengthened in Japan and overseas.

  Reducing greenhouse gas emissions is becoming increasingly important for companies in terms of social contribution, emission regulations, and allowance trading. From these trends, there is a need for a system to grasp greenhouse gas emissions during production and to support activities for reduction.

  In addition to carbon dioxide, greenhouse gases include methane, dinitrogen monoxide, and hydrofluorocarbons. By taking the product of each emission and the global warming potential, it can be converted to carbon dioxide.

  The total amount of carbon dioxide emissions in Japan is said to be about 40% by industrial sectors such as factories. Further, most of the carbon dioxide emitted in factories is derived from the use of energy such as electric power, steam and cold / hot water.

  As a system for managing energy consumption in a factory, there is a technique for collecting energy data for each type in real time and managing it in terms of energy intensity, as described in [Patent Document 1].

  Further, as described in [Patent Document 2], the first environmental assessment substance for energy consuming equipment and energy conversion equipment based on the amount of energy passing through at least one target location in the consumer and the emission intensity information. There is an environmentality calculation device that calculates a second emission amount of an environmental substance when it is assumed that there is no energy conversion means and calculates a reduction amount due to the presence or absence of the energy conversion means.

JP 2007-264704 A JP 2002-31537 A

  In the conventional technology described in [Patent Document 1], energy production data of a motive power system, energy consumption data of a facility system, and energy consumption data of a production system are collected, and a factory energy unit is managed. However, what is managed is only the amount of energy produced or consumed by each facility, and measures for reducing carbon dioxide emissions cannot be determined.

  Further, in the conventional technique described in [Patent Document 2], it can be determined whether or not there is an energy conversion unit, but in reality, the energy conversion unit may not be eliminated, and comparison with an ideal state cannot be performed. Therefore, there is a problem that it is not possible to decide on a measure for reducing carbon dioxide emissions.

  The purpose of the present invention is to study carbon dioxide emission reduction methods by calculating and analyzing carbon dioxide emissions originating from production facilities and utility facilities in order to reduce carbon dioxide emissions. An object of the present invention is to provide an apparatus for calculating the carbon dioxide emissions that can be produced.

  In order to achieve the above object, a carbon dioxide emission calculating apparatus according to the present invention includes a measurement value collection unit that collects measurement values as operation information of facilities from production facilities and utility facilities, and the collected measurement values and facilities. An emission calculation unit that calculates carbon dioxide emissions from specifications, a data analysis unit that analyzes calculated carbon dioxide emissions, and a data storage unit that stores collected measurements, calculated carbon dioxide emissions, and analysis results And a display unit for displaying the stored data.

  According to the present invention, not only energy management in a factory, but also calculation and analysis of carbon dioxide emissions can be performed to assist in optimizing equipment and optimizing equipment operation, thereby reducing carbon dioxide emissions. It becomes possible.

The block diagram of the calculation apparatus of a carbon dioxide discharge. The block diagram of production equipment. A graph showing the basic unit of carbon dioxide emissions for each product lot. Graph comparing carbon dioxide emission intensity with LCA calculation results. Graph comparing carbon dioxide emissions from production facilities and utility facilities.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a configuration diagram of a carbon dioxide emission calculating apparatus according to the present embodiment.

  As shown in FIG. 1, the carbon dioxide emission calculation apparatus of this embodiment includes a measurement value collection unit 1 and a measurement value collection unit 1 that collect measurement values that are operation information of facilities from production facilities and utility facilities. Connected to the emission calculation unit 2 that calculates the carbon dioxide emission from the measurement values collected by the measurement value collection unit 1 and the specifications of the equipment, the carbon dioxide calculated by the emission calculation unit 2 is connected to the emission calculation unit 2 Connected to the data analysis unit 3, the measurement value collection unit 1, the emission amount calculation unit 2, and the data analysis unit 3 for analyzing the emission amount, the measurement value collected by the measurement value collection unit 1, and the dioxide calculated by the emission amount calculation unit 2 The data storage unit 4 stores the carbon emission amount and the analysis result analyzed by the data analysis unit 3, and the display unit 5 is connected to the data storage unit 4 and displays the data stored by the data storage unit 4.

  FIG. 2 is a configuration diagram of a production facility according to the first embodiment. In the example shown in FIG. 2, the production facility includes three reactors 14, a stirring blade 16 for stirring the reactants is provided in the reactor 14, and the rotating shaft to which the stirring blade 16 is attached is The motor 15 is rotationally driven. The three motors 15 are supplied with electric power from the power supply 11 by wiring, and the power amount that is the total power consumption of the three motors is collectively measured at one place by the wattmeter 12 provided in the middle of the wiring. .

  In this example, the electric power supplied from the power source 11 is used to rotate the stirring blades 16 in each reactor 14. However, since no wattmeter is installed in each reactor 14, The amount of individual power used is unknown.

  For this reason, the energy consumption of each reactor 14 is estimated from the operation information of the production facility. In this example, a power meter is not installed in each reactor of FIG. 2 to directly measure the power consumption (energy consumption), but a torque meter for measuring the rotational torque of the stirring blade 16 of the reactor 14. The power consumption is estimated from (not shown).

  When the stirring blade 16 is installed in the reactor 14, a torque meter and a rotation speed meter are installed in the motor 15 that rotates the stirring blade 16. This is because if the viscosity of the substance in the reactor increases due to the progress of the reaction, the load on the stirring blade 16 and the motor 15 may increase and breakage. If the rotational torque exceeds the set value, an alarm is issued. This is so that the motor 15 can be stopped.

  The amount of electric power consumed in each reactor 14 can be estimated from the rotational torque and the rotational speed of the stirring blade 16. When the rotational torque of the stirring blade is T [N · m] and the rotational speed of the stirring blade is n [1 / s], the required power P [W] for stirring is expressed by Formula 1.

  Assuming that the operation time of the stirring blade is t [s], the power consumption W [J] by stirring is expressed by Equation 2.

Accordingly, the carbon dioxide emission amount E [kg-CO ₂ ] during the operation time t is expressed by Equation 3 when the emission coefficient is α [kg-CO ₂ / J].

In addition, the carbon dioxide emission amount E _all [kg-CO ₂ ] of the entire production facility including the three reactors 14 is expressed by Equation 4.

  FIG. 3 shows the carbon dioxide emission basic unit obtained by dividing the carbon dioxide emission amount E obtained in Equation 3 by the production amount of the product produced during the operation time t, and is displayed for each product lot. It is a graph.

  In the example shown in FIG. 3, the carbon dioxide emission basic unit of the third lot from the left shows a large value. Thus, if the carbon dioxide emission basic unit becomes large in a specific lot, what is the cause? If so, you can investigate the cause and improve it.

  For example, if energy is lost due to a work mistake, the work procedure is reviewed, or if a utility facility with a large carbon dioxide emission is operated, the production schedule of the product and the operation schedule of the utility facility Or review.

  FIG. 4 is a graph in which the carbon dioxide emission basic unit is displayed for each product lot and compared with the carbon dioxide emission basic unit based on the result of life cycle assessment (LCA), as in FIG. 3.

  In LCA, the purpose and evaluation range are set, the process to be evaluated, the system boundary that is the range, the functional unit that is the unit to be evaluated, the environmental load to be evaluated are clarified, the purpose of the evaluation is clarified, and the determined system Intervention analysis is performed to analyze the input amount of energy and materials, the input amount of exhaust gas and waste in the life cycle of the product within the boundary, and the environmental impact is converted into the environmental impact, and the impact is evaluated and interpreted. .

  In general, the LCA calculation is performed based on data at the time of product design, and therefore is different from the carbon dioxide emission basic unit calculated from the measurement data. As shown in Fig. 4, if the calculation result from the measurement data is smaller than the calculation result of the LCA, it is considered that the equipment efficiency is improved compared to the product design, while the measurement result is higher than the calculation result of the LCA. If the calculation result from the data increases, it is considered that the equipment efficiency has deteriorated compared to the product design. In either case, it can be used as a basis for correcting the data used when calculating the LCA.

FIG. 5 is a graph comparing the carbon dioxide emission amount E _{all of the} entire production facility obtained by Equation 4 with the carbon dioxide emission amount obtained from the amount of power supplied from the utility equipment measured by the power meter. .

  The carbon dioxide emission calculated in Equation 4 is calculated as the power consumption is proportional to the agitation torque and the agitation time, and thus does not match the measured value by the power meter, but a value close to the measured value is obtained Conceivable.

  If there is a difference between the carbon dioxide emissions resulting from the energy consumption at the production facility and the carbon dioxide emissions resulting from the energy supply at the utility facility, the assumption of energy consumption calculation is incorrect or the facility operation It is thought that energy loss has occurred in

  As shown in FIG. 5, by showing the carbon dioxide emissions resulting from energy consumption at production facilities and the carbon dioxide emissions resulting from energy supply at utility facilities, energy loss reduction methods can be examined, This can be done by replacing the equipment with a better one or by improving the operation method of the equipment while maintaining the existing equipment.

  In the present embodiment, power has been described as an example of utility, but there are steam, hot water, cold water, compressed air, etc. as other utility. In any case, it is possible to obtain the carbon dioxide emissions derived from the supply amount from utility facilities, and it is possible to examine the reduction method by converting the consumption of various utilities into carbon dioxide emissions. it can.

DESCRIPTION OF SYMBOLS 1 Measured value collection part 2 Emission amount calculation part 3 Data analysis part 4 Data storage part 5 Display part 11 Power supply 12 Wattmeter 13 Production equipment 14 Reactor 15 Motor 16 Stirring blade

Claims (3)

  A measurement value collection unit that collects measurement values that are operation information of equipment from production facilities and utility facilities, and an emission amount calculation unit that calculates carbon dioxide emissions from the measurement values and facility specifications collected by the measurement value collection unit; A data analysis unit that analyzes the carbon dioxide emission calculated by the emission calculation unit, a measurement value collected by the measurement value collection unit, a carbon dioxide emission calculated by the emission calculation unit, and the data analysis unit A data storage unit for storing the analysis result analyzed in step (b), and a display unit for displaying data stored in the data storage unit, wherein the data analysis unit emits carbon dioxide derived from energy consumed in the production facility. An apparatus for calculating carbon dioxide emissions, characterized in that the amount is calculated and compared with carbon dioxide emissions derived from energy produced by utility equipment.   A measurement value collection unit that collects measurement values that are operation information of equipment from production facilities and utility facilities, and an emission amount calculation unit that calculates carbon dioxide emissions from the measurement values and facility specifications collected by the measurement value collection unit; A data analysis unit for analyzing the carbon dioxide emission calculated by the emission calculation unit, a measurement value collected by the measurement value collection unit, a carbon dioxide emission calculated by the emission calculation unit, and the data analysis unit A data storage unit for storing the analysis result analyzed in step (b), and a display unit for displaying the data stored in the data storage unit, wherein the data analysis unit is based on the calculated carbon dioxide emissions and the life cycle assessment. A carbon dioxide emission calculating device, which compares the calculated carbon dioxide emission amount.   The said emission amount calculation part estimates an energy consumption amount from the operation information of a production facility, when calculating the carbon dioxide emission amount derived from the energy consumed by the production facility. The apparatus for calculating carbon dioxide emissions described in 1.

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