Carbon dioxide emission calculation system, method, and program

Abstract

To provide a carbon dioxide emission calculation system, method, and program which can obtain an emission of carbon dioxide related to a product in consideration of an emission of carbon dioxide accompanying the use of changeover materials.SOLUTION: The present invention is a carbon dioxide emission calculation system 1000 which obtains a CO2 emission related to a target product of a target type manufactured in a prescribed period in a factory capable of manufacturing a plurality of types of products to be manufactured from raw materials through a plurality of processes. The plurality of processes include changeover material use processes using changeover materials for use in changeover, and a total CO2 emission related to the changeover materials in a prescribed period is obtained for each of the processes using the changeover materials, and this total emission is distributed to products manufactured through the processes using the changeover materials at a prescribed first ratio to obtain a new CO2 emission related to the target product of the target type.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a carbon dioxide emission calculation system, a carbon dioxide emission calculation method, and a carbon dioxide emission calculation program for calculating the amount of carbon dioxide emission. [Background technology]

[0002] In recent years, from the viewpoint of preserving the global environment, carbon dioxide emissions (CO2 emissions) have attracted attention, and technologies relating to such carbon dioxide emissions have been researched and developed (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2010-191832 A (Patent No. 5097728 A) Summary of the Invention [Problem to be solved by the invention]

[0004] When multiple types of products are manufactured from raw materials through multiple processes, a so-called changeover is performed when changing the type of product being manufactured. Changeovers involve, for example, maintenance and cleaning of the equipment used in the process, changing the equipment's settings, pre-operation of the equipment to ensure stable operation, and changing the material being processed in the equipment, depending on the type of product being manufactured. In these cases, an item (a changeover item) may be used depending on the nature of the changeover. For example, in the case of a metal material processing process, when the rolling rolls are replaced in a hot rolling facility (hot rolling mill), a pre-rolled material is rolled to prevent the surface of the rolling rolls from becoming unstable immediately after the replacement or to raise the roll temperature to an appropriate temperature. Or, for example, when switching from processing product A in a continuous annealing furnace to processing product B, which has a different heat treatment temperature, a buffer material (dummy material) is welded and connected between the coils of product A and product B to protect against temperature changes in the continuous annealing furnace. Or, for example, when switching from processing product A to processing product B with a different width in cold rolling equipment (cold rolling mill), a width transition material that gradually changes the width of the plate is welded between product A and product B. When calculating the carbon dioxide emissions related to a product, it is desirable to take into account the carbon dioxide emissions associated with the use of such pre-threading materials, buffer materials, and width transition materials, which are used in the changeover. Note that such changeover materials are not shipped or sold from the factory as products, and are not factory products.

[0005] The present invention has been made in consideration of the above circumstances, and its purpose is to provide a carbon dioxide emission calculation system, a carbon dioxide emission calculation method, and a carbon dioxide emission calculation program that can determine the amount of carbon dioxide emission related to a product by taking into account the amount of carbon dioxide emission associated with the use of a setup change item. [Means for solving the problem]

[0006] After extensive investigation, the inventors have found that the above object can be achieved by the present invention described below. That is, a carbon dioxide emission calculation system according to one aspect of the present invention is a system for calculating CO2 emissions for target products of a target type manufactured during a predetermined period in a factory capable of manufacturing a plurality of types of products that are manufactured from raw materials through a plurality of processes, wherein the plurality of processes include a process using a set-up item that uses a set-up item that is an item used in a set-up change, and for each of the plurality of processes used in the manufacture of the products manufactured during the predetermined period, if the process is a set-up item using process, the system calculates the total amount of CO2 emissions for the set-up item used during the predetermined period. and an emission calculation unit that calculates, for each of a plurality of processes used in the manufacture of the target product of the target type, if the process is a process using the setup replacement object, a predetermined first ratio of the total CO2 emissions from the setup replacement object calculated by the setup replacement object total emission calculation unit as an allocation amount for the process; and, for each of a plurality of processes used in the manufacture of the target product of the target type, if the process is a process using the setup replacement object, by adding the allocation amount calculated by the allocation amount calculation unit for the process to the CO2 emissions for the target product of the target type. Preferably, in the above-described carbon dioxide emission calculation system, when the same type of process is carried out using one piece of equipment, or when the same type of process is carried out using a plurality of pieces of equipment without distinguishing between the plurality of pieces of equipment, the total emission amount calculation unit for setup replacement items calculates, for each of a plurality of processes (i.e., a plurality of pieces of equipment) used in the production of products produced during the specified period, if the process is a process using the setup replacement item, the total amount of CO2 emissions during the specified period related to the setup replacement item used in the process.Preferably, in the above-described carbon dioxide emission calculation system, when the same type of process is carried out using a plurality of pieces of equipment and the plurality of pieces of equipment are distinguished (that is, when the same type of process is regarded as a plurality of different processes for each piece of equipment, in other words, when the processes are categorized by combinations of process and equipment), the total emission amount calculation unit for setup replacement items determines, for each of a plurality of processes used in the manufacture of products manufactured during the specified period and for each piece of equipment used to carry out the process, if the process is a process using the setup replacement item, the total amount of CO2 emissions for the setup replacement item during the specified period.

[0007] This carbon dioxide emission calculation system calculates the total amount of CO2 emissions related to the setup replacement object for each process that uses the setup replacement object over a predetermined period of time, and allocates this calculated total amount to products manufactured through the process that use the setup replacement object at a predetermined first rate. Therefore, the carbon dioxide emission calculation system can calculate the amount of carbon dioxide emissions related to a product by taking into account the amount of carbon dioxide emissions associated with the use of the setup replacement object.

[0008] In another aspect, in the above-mentioned carbon dioxide emission calculation system, the allocation amount calculation unit calculates the allocation amount by setting the predetermined first ratio as the ratio of the CO2 emissions related to the process used in manufacturing the target product of the target type to the total amount of CO2 emissions related to the process during the specified period.

[0009] This makes it possible to provide a carbon dioxide emission calculation system that calculates the amount of allocation based on the ratio of CO2 emissions.

[0010] In another aspect, in the above-mentioned carbon dioxide emission calculation system, the allocation amount calculation unit calculates the allocation amount by setting the predetermined first ratio as the ratio of the processing amount or processing time processed in the process used in manufacturing the target product of the target type to the total processing amount or processing time processed in the process during the specified period.

[0011] This makes it possible to provide a carbon dioxide emission calculation system that determines the amount of carbon dioxide emission to be allocated based on the ratio of the processing amount or processing time.

[0012] In another aspect, in the above-mentioned carbon dioxide emission calculation system, when one setup object is used in multiple processes during the predetermined period, the system further includes an allocation amount calculation unit that calculates, for each of the multiple processes, allocation amounts for allocating the CO2 emissions related to the setup object in that process to that process and each of the subsequent processes that use the setup object at a predetermined second rate, and allocates the calculated allocation amounts to the CO2 emissions related to that process and each of the subsequent processes that use the setup object. Preferably, in the above-mentioned carbon dioxide emission calculation system, the predetermined second rate is an equal rate that allocates the CO2 emissions equally among the multiple processes.

[0013] This type of carbon dioxide emission calculation system allocates the CO2 emissions related to a setup change object in a given process to that process and to each process that uses the setup change object after that process. Therefore, even if one setup change object is used in multiple processes, it is possible to avoid double counting of the CO2 emissions of the setup change object in the processes that use that setup change object, and it is possible to appropriately determine the CO2 emissions related to the setup change object.

[0014] A carbon dioxide emission calculation method according to another aspect of the present invention is a method for calculating carbon dioxide emissions in a factory capable of producing a plurality of types of products that are manufactured from raw materials through a plurality of processes, the method calculating the amount of carbon dioxide emissions related to target products of a target type that are manufactured during a predetermined period, the plurality of processes including a process using a set-up item that is an object used in a set-up change, and for each of the plurality of processes used in the manufacture of the products manufactured during the predetermined period, if the process is a set-up item using process, the method calculates the total amount of CO2 emissions related to the set-up items used in the process during the predetermined period as a set-up item total CO2 emission amount. an amount calculation step, an allocation amount calculation step for calculating, for each of a plurality of processes used in the manufacture of the target product of the target type, if the process is a process using the setup replacement object, a predetermined first ratio of the total CO2 emissions from the setup replacement object calculated for that process in the total emission amount calculation step, as an allocation amount; and an emission amount calculation step for calculating, for each of a plurality of processes used in the manufacture of the target product of the target type, if the process is a process using the setup replacement object, by adding the allocation amount calculated for that process in the allocation amount calculation step to the CO2 emissions related to the target product of the target type.

[0015] This carbon dioxide emission calculation method calculates the total amount of CO2 emissions related to the setup replacement object for each process that uses the setup replacement object over a predetermined period of time, and allocates this calculated total amount to products manufactured through the process that uses the setup replacement object at a predetermined first rate. Therefore, the carbon dioxide emission calculation method can calculate the amount of carbon dioxide emissions related to a product by taking into account the amount of carbon dioxide emissions associated with the use of the setup replacement object.

[0016] Another aspect of the present invention is a carbon dioxide emission calculation program that calculates the CO2 emissions for a target product of a target type manufactured over a specified period in a factory capable of manufacturing multiple types of products that are manufactured from raw materials through multiple processes, and is a program that causes a computer to function as any of the carbon dioxide emission calculation systems described above.

[0017] This makes it possible to provide a carbon dioxide emission calculation program, which has the same effects as the carbon dioxide emission calculation system described above. [Effects of the Invention]

[0018] The carbon dioxide emission amount calculation system, carbon dioxide emission amount calculation method, and carbon dioxide emission amount calculation program according to the present invention can determine the carbon dioxide emission amount related to a product, taking into account the carbon dioxide emission amount associated with the use of a setup change item. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a diagram showing a configuration of a carbon dioxide emission amount calculation system according to an embodiment. [Figure 2] FIG. 10 is a diagram showing a product information table as an example. [Figure 3] FIG. 10 is a diagram showing an example of a setup change object information table. [Figure 4] As an example, this is a diagram for explaining the amount of CO2 emissions for each process in a predetermined period for each type (product type) of product. [Figure 5] As an example, this is a diagram for explaining the amount of CO2 emissions for each process in a predetermined period for each type of setup change object. [Figure 6] As an example, this is a diagram for explaining how to calculate the total CO2 emissions from setup changeover items. [Figure 7] FIG. 10 is a diagram illustrating, as an example, how to determine the allocation amount in the first mode. [Figure 8]FIG. 10 is a diagram for explaining, as an example, how to calculate the CO2 emissions related to a product when the method for calculating the allocation amount in the first mode is used. [Figure 9] FIG. 10 is a diagram illustrating, as an example, how to determine the allocation amount in the second mode. [Figure 10] FIG. 10 is a diagram illustrating, as an example, how to calculate the CO2 emissions related to a product when the method for calculating the allocation amount in the second aspect is used. [Figure 11] 4 is a flowchart showing the operation of the carbon dioxide emission calculation system. DETAILED DESCRIPTION OF THE INVENTION

[0020] Hereinafter, one or more embodiments of the present invention will be described with reference to the drawings. However, the scope of the invention is not limited to the disclosed embodiments. In addition, components with the same reference numerals in each drawing indicate the same components, and their description will be omitted as appropriate. In this specification, when referring to a general term, a reference numeral without a subscript is used, and when referring to an individual component, a reference numeral with a subscript is used.

[0021] A carbon dioxide emission calculation system according to an embodiment calculates the amount of carbon dioxide emissions (CO2 emissions) associated with target products of a target type manufactured during a predetermined period in a factory (plant) capable of manufacturing multiple types of products from raw materials through multiple processes. In this carbon dioxide emission calculation system, the multiple processes include a process using a target object for a changeover, which is a process using a target object for a changeover. The carbon dioxide emission calculation system includes a target object for changeover total emission calculation unit, an allocation amount calculation unit, and an emission amount calculation unit. For each of multiple processes used in the manufacture of the products manufactured during the predetermined period, if the process is a target object for changeover use process, the target object for changeover total emission calculation unit calculates the total amount of CO2 emissions associated with the target object for a changeover used during the predetermined period as the target object for changeover total CO2 emissions. The allocation amount calculation unit calculates, for each of a plurality of processes used in the production of the target product of the target type, a predetermined first ratio of the total CO2 emissions from the setup replacement objects calculated by the total setup replacement object emission calculation unit for that process as an allocation amount, when that process is a process using the setup replacement object. The emission calculation unit calculates, for each of a plurality of processes used in the production of the target product of the target type, a new CO2 emissions from the target product of the target type by adding the allocation amount calculated by the allocation amount calculation unit for that process to the CO2 emissions from the target product of the target type, when that process is a process using the setup replacement object.

[0022] The following describes in more detail such a carbon dioxide emission calculation system, as well as a carbon dioxide emission calculation method and a carbon dioxide emission calculation program implemented therein. Here, as an example, a factory capable of producing a wide variety of rolled steel plates will be used. However, the factory may be any factory capable of producing multiple types of products manufactured from raw materials through multiple processes. The multiple processes include a setup change object utilization process, which utilizes a setup change object used in setup changes. The carbon dioxide emission calculation system may be configured by interconnecting an input / output terminal device that inputs and outputs data, one or more arithmetic processing devices (e.g., server devices) that perform various arithmetic processing, and one or more database devices that store (manage) various data. At least some of the input / output terminal device, one or more arithmetic processing devices, and one or more database devices may be integrated and interconnected for communication with the remainder. However, the carbon dioxide emission calculation system will be described here using an integrated carbon dioxide emission calculation device as an example.

[0023] FIG. 1 is a diagram illustrating the configuration of a carbon dioxide emission calculation system (a carbon dioxide emission calculation device, as an example) according to an embodiment. FIG. 2 is a diagram illustrating a product information table, as an example. FIG. 3 is a diagram illustrating a setup change object information table, as an example. FIG. 4 is a diagram illustrating, as an example, the amount of CO2 emissions for each process in a predetermined period for each type (variety) of product. FIG. 4A illustrates a product whose type is product specification A, FIG. 4B illustrates a product whose type is product specification B, and FIG. 4C illustrates a product whose type is product specification C. FIG. 5 is a diagram illustrating, as an example, the amount of CO2 emissions for each process in a predetermined period for each type of setup change object. FIG. 5A illustrates a setup change object whose type is cushioning material A, FIG. 5B illustrates a setup change object whose type is pre-passing material A, and FIG. 5C illustrates a setup change object whose type is pre-passing material B and cushioning material B. Fig. 5C shows a case where one setup change object is used in two different processes. Fig. 6 is a diagram illustrating, by way of example, how to calculate the total CO2 emissions from the setup change object. Fig. 7 is a diagram illustrating, by way of example, how to calculate the allocation amount in the first embodiment. Fig. 8 is a diagram illustrating, by way of example, how to calculate the CO2 emissions related to a product when the method for calculating the allocation amount in the first embodiment is used. Fig. 9 is a diagram illustrating, by way of example, how to calculate the allocation amount in the second embodiment. Fig. 10 is a diagram illustrating, by way of example, how to calculate the CO2 emissions related to a product when the method for calculating the allocation amount in the second embodiment is used.

[0024] The carbon dioxide emission calculation system (carbon dioxide emission calculation device as an example) 1000 in the embodiment includes, for example, a control processing unit 1, an input unit 2, an output unit 3, an interface unit (IF unit) 4, and a memory unit 5, as shown in FIG.

[0025] The input unit 2 is connected to the control processing unit 1 and is a device that inputs various commands, such as a command to start calculation, and various data required to operate the carbon dioxide emission calculation device 1000, such as product information, which is information about products, and setup change item information, which is information about setup change items, to the carbon dioxide emission calculation device 1000, and is, for example, a keyboard, a mouse, or a plurality of input switches to which predetermined functions are assigned. The output unit 3 is connected to the control processing unit 1 and is a device that outputs the commands, data, and calculation results input from the input unit 2 under the control of the control processing unit 1, and is, for example, a display device such as a CRT display, an LCD (liquid crystal display), or an organic EL display, or a printing device such as a printer.

[0026] The input unit 2 and the output unit 3 may be configured as a touch panel. In the case of configuring this touch panel, the input unit 2 is a position input device that detects and inputs an operation position, for example, a resistive film type or a capacitive type, and the output unit 3 is a display device. In this touch panel, a position input device is provided on the display surface of the display device, and one or more input content candidates that can be input to the display device are displayed on the display device. When a user touches the display position showing the input content that the user wants to input, the position is detected by the position input device, and the display content displayed at the detected position is input to the carbon dioxide emission calculation device 1000 as the user's operation input content. With such a touch panel, the user can easily intuitively understand the input operation, and therefore a carbon dioxide emission calculation device 1000 that is easy for the user to use is provided.

[0027] The IF unit 4 is connected to the control processing unit 1 and is a circuit that inputs and outputs data to and from, for example, an external device under the control of the control processing unit 1, and is, for example, an interface circuit for RS-232C, which is a serial communication method, an interface circuit using the Bluetooth (registered trademark) standard, an interface circuit using the USB standard, etc. The IF unit 4 may also be, for example, a communication interface circuit that transmits and receives communication signals to and from an external device, such as a data communication card or a communication interface circuit conforming to the IEEE802.11 standard, etc.

[0028] The storage unit 5 is connected to the control processing unit 1 and is a circuit that stores various predetermined programs and various predetermined data under the control of the control processing unit 1. In one example, the various predetermined programs are recorded on a recording medium such as a CD-R or DVD-R, and are input from the recording medium via its drive device and the IF unit 4 and stored in the storage unit 5.

[0029] The various predetermined programs include, for example, a control processing program, which includes, for example, a control program, a total emission amount calculation program for setup replacement objects, an allocation amount calculation program, an emission calculation program, and an allocation amount calculation program. The control program controls each of the units 2-5 of the carbon dioxide emission calculation device 1000 according to the function of each unit. The total emission amount calculation program for setup replacement objects calculates, for each of a plurality of processes used in the manufacture of products manufactured during a predetermined period, the total amount of CO2 emissions related to setup replacement objects used in the process as the total CO2 emissions for the setup replacement objects, if the process uses a setup replacement object. The allocation amount calculation program calculates, for each of a plurality of processes used in the manufacture of a target product of a target type whose CO2 emissions are to be calculated, a predetermined first proportion of the total CO2 emissions for the process calculated by the total emission amount calculation program for setup replacement objects, as the allocation amount, if the process uses a setup replacement object. The emission calculation program calculates new CO2 emissions for the target product of the target type by adding the allocation amount calculated by the allocation amount calculation program for each of a plurality of processes used in the production of the target product of the target type, when the process is a process using the setup object, to the CO2 emissions for the target product of the target type. When one setup object is used in a plurality of processes during the specified period, the allocation amount calculation program calculates, for each of the plurality of processes, allocation amounts for allocating the CO2 emissions for the setup object in that process to the step in question and to each of subsequent processes using the setup object at a predetermined second rate, and allocates each of the calculated allocation amounts to the CO2 emissions for the step in question and to each of subsequent processes using the setup object.

[0030] The various predetermined data include, for example, product information, information on items for setup change, various calculation results during calculation, and final calculation results, which are necessary for executing each of these programs.

[0031] The storage unit 5 includes, for example, a ROM (Read Only Memory), which is a nonvolatile storage element, and an EEPROM (Electrically Erasable Programmable Read Only Memory), which is a rewritable nonvolatile storage element. The storage unit 5 also includes a RAM (Random Access Memory), which serves as a working memory for the control processing unit 1 and stores data generated during execution of the predetermined program. The storage unit 5 may also be configured with a hard disk drive or solid state drive (SSD) with a relatively large storage capacity.

[0032] The storage unit 5 functionally includes a basic information storage unit 51 for storing product information and setup change item information.

[0033] The basic information storage unit 51 stores product information and information on items for setup change. The product information is information about products for each type of product, and includes at least information for calculating the CO2 emissions and a predetermined first ratio for the product of that type over a predetermined period. For example, if the predetermined first ratio is the ratio of the CO2 emissions for a process used in the manufacture of the target product of the target type to the total amount of CO2 emissions for that process over the predetermined period (first aspect), the product information includes the CO2 emissions for each of the multiple processes used in the manufacture of the product over the predetermined period. Alternatively, if the predetermined first ratio is the ratio of the processing amount or processing time for that process used in the manufacture of the target product of the target type to the total amount of processing amount or processing time for that process over the predetermined period (second aspect), the product information includes the processing amount or processing time for each of the multiple processes used in the manufacture of the product. In this embodiment, in order to be able to deal with both the first and second aspects, the product information includes the amount of CO2 emissions related to the process, the amount of processing in the process, and the processing time of the process.

[0034] In this embodiment, this product information is stored in table form in the basic information storage unit 51. The product information table 511 for registering this product information includes, for example, a plurality of tables 511-1, 511-2, 511-3, ... for each type of product, as shown in Fig. 2, and is provided with a process order field 5111 for registering the process order, a process name field 5112 for registering the name of the process to be performed in the order registered in the process order field 5111, a processing amount field 5113 for registering the processing amount [ton] of the process to be performed in the order registered in the process order field 5111, a processing time field 5114 for registering the processing time [hr] of the process to be performed in the order registered in the process order field 5111, and a CO2 emission amount field 5115 for registering the CO2 emission amount [tCO2] related to the process to be performed in the order registered in the process order field 5111, and has a record for each of the plurality of processes used in manufacturing the product of that type. The product information table 511 may include records for registering the CO2 emissions for that type of product for a specified period of time, but in this embodiment, the product information table 511 does not include records for registering the CO2 emissions for that type of product for a specified period of time, because the CO2 emissions for that type of product for a specified period of time are determined by adding up the CO2 emissions for each process registered in each record in the CO2 emissions field 5115.

[0035] In this embodiment, CO2 emissions related to raw materials are also included in CO2 emissions related to products, so the product information table 511 in the example shown in Fig. 2 further includes records for raw materials. Of course, CO2 emissions related to raw materials do not need to be included in CO2 emissions related to products.

[0036] CO2 emissions related to raw materials are the amount of CO2 emitted in the production of raw materials. For example, when raw materials are procured from outside the factory, this can be calculated by multiplying the amount of CO2 emissions per unit amount obtained from the supplier (unit CO2 emissions of raw materials) by the amount of raw materials.

[0037] The CO2 emissions related to a process are the amount of CO2 emitted in the course of the process, for example, the CO2 emissions associated with the operation of equipment used to carry out the process. In this case, the CO2 emissions related to the process are also the CO2 emissions related to the equipment (CO2 emissions associated with the operation of the equipment), and the process name is also the name of the equipment. For example, if the equipment is operated using electrical energy, the CO2 emissions are the CO2 emissions associated with the generation of the electrical energy. Alternatively, for example, if the equipment is operated using steam, the CO2 emissions are the CO2 emissions associated with the generation of the steam. The CO2 emissions related to a process can be calculated, for example, by multiplying the unit CO2 emissions of the equipment, which have been determined in advance from multiple samples, by the operation volume of the equipment. If the operation volume of the equipment is expressed in terms of the throughput of the equipment, the unit CO2 emissions of the equipment are the CO2 emissions per unit throughput, and if the operation volume of the equipment is expressed in terms of the processing time of the equipment, the unit CO2 emissions of the equipment are the CO2 emissions per unit processing time.

[0038] The CO2 emissions related to a product are the amount of CO2 emitted in the manufacture of the product, and are calculated, for example, as described above, by adding up the CO2 emissions related to each of the multiple steps used in the manufacture of the product; in this embodiment, the CO2 emissions related to the raw materials are also added up.

[0039] In the examples shown in FIGS. 2 and 4, a product whose type is product specification A (product of product specification A), a product whose type is product specification B (product of product specification B), and a product whose type is product specification C (product of product specification C) are manufactured during a predetermined period. For the product of product specification A, raw material A whose raw material-related CO2 emissions are 50 tCO2 is used as the raw material. First, a melting process is carried out using a melting furnace, and the CO2 emissions associated with this melting process are 40 tCO2. Next, a hot rolling process is carried out using hot rolling equipment, and the throughput of this hot rolling process is 40 tonnes, and the CO2 emissions associated with this hot rolling process are 30 tCO2. Next, a cold rolling process is carried out using cold rolling equipment, and the CO2 emissions associated with this cold rolling process are 10 tCO2. Then, a heat treatment process is carried out using an annealing furnace, and the throughput of this heat treatment process is 30 tonnes, and the CO2 emissions associated with this heat treatment process are 30 tCO2. These processes produce 30 tons of product with product specification A, and the CO2 emissions associated with the product with product specification A are 160 tCO2 (= 50 + 40 + 30 + 10 + 30). Product specification B uses raw material B, which has a raw material CO2 emission of 100 tCO2, as its raw material. First, a melting process is carried out using a melting furnace, and the CO2 emissions associated with this melting process are 60 tCO2. Next, a hot rolling process is carried out using hot rolling equipment, and the processing volume of this hot rolling process is 60 tonnes, and the CO2 emissions associated with this hot rolling process are 50 tCO2. Next, a heat treatment process is carried out using an annealing furnace, and the processing volume of this heat treatment process is 50 tonnes, and the CO2 emissions associated with this heat treatment process are 70 tCO2. Finally, a cold rolling process is carried out using cold rolling equipment, and the CO2 emissions associated with this cold rolling process are 30 tCO2. Through these processes, 50 tons of product with product specification B are manufactured, and the CO2 emissions associated with product specification B are 310 tCO2 (= 100 + 60 + 50 + 70 + 30). Product specification C uses raw material C, which has a raw material CO2 emission of 40 tCO2, and first undergoes a melting process in a melting furnace, with the CO2 emissions associated with this melting process being 30 tCO2.Next, a hot rolling process is carried out using hot rolling equipment, with a processing volume of 50 tons, resulting in CO2 emissions of 40 tCO2. Next, a cold rolling process is carried out using cold rolling equipment, resulting in CO2 emissions of 20 tCO2. Then, a cutting process is carried out using a cutting device, resulting in CO2 emissions of 10 tCO2. These processes produce 30 tons of product with product specification C, resulting in CO2 emissions of 140 tCO2 (= 40 + 30 + 40 + 20 + 10).

[0040] The information on the items for setup replacement is information on the items for setup replacement for each type of item for setup replacement, and includes at least the amount of CO2 emissions related to the items for setup replacement of that type during a predetermined period.

[0041] In this embodiment, this setup replacement item information is stored in table format in the basic information storage unit 51. The setup replacement item information table 512, which registers this setup replacement item information, includes, for example, a plurality of tables 512-1, 512-2, 512-3, ... for each type of setup replacement item, as shown in Fig. 3 . In this embodiment, a setup change object is produced through each process similar to that of a product, from the raw materials to the process in which the setup change object is used. Therefore, the setup change object information table 512 is configured in substantially the same manner as the above-mentioned product information table 511, and includes a process order field (processing order field) 5121 for registering the process order (processing order), a process name field (processing name field) 5122 for registering the name of the process (process) to be performed in the order registered in the process order field 5121, a processing amount field 5123 for registering the processing amount [ton] of the process to be performed in the order registered in the process order field 5121, a processing time field 5124 for registering the processing time [hr] of the process to be performed in the order registered in the process order field 5121, and a CO2 emission amount field 5125 for registering the CO2 emission amount [tCO2] related to the process to be performed in the order registered in the process order field 5121, and has a record for each of the multiple processes (processes) used in creating (manufacturing, processing) the type of setup change object. The setup change object information table 512 may include a record for registering the CO2 emissions for that type of setup change object for a specified period, but since the CO2 emissions for that type of setup change object for a specified period can be determined by adding up the CO2 emissions for each process registered in each record in the CO2 emission field 5125, in this embodiment, the table does not include a record for registering the CO2 emissions for that type of setup change object for a specified period.

[0042] In this embodiment, CO2 emissions related to raw materials are also included in the CO2 emissions related to setup replacement items, so the setup replacement item information table 512 in the example shown in Fig. 3 further includes records for raw materials. Of course, CO2 emissions related to raw materials do not need to be included in the CO2 emissions related to setup replacement items.

[0043] The setup replacement item information table 512 does not necessarily have to include the processing amount field 5123 and the processing time field 5124.

[0044] The CO2 emissions related to the setup replacement item are the amount of CO2 emitted in the processing of the setup replacement item, and are calculated, for example, as described above, by adding up the CO2 emissions related to each of the multiple processes (steps) used in creating (manufacturing, processing) the setup replacement item, and in this embodiment, the CO2 emissions related to the raw materials are also added up.

[0045] In the examples shown in FIGS. 3 and 5, during a given period, a setup change object (cushion material A) whose type is cushioning material A, a setup change object (pre-passing material A) whose type is pre-passing material A, and a setup change object (pre-passing material B and cushioning material B) whose type is pre-passing material B and cushioning material B are used. Pre-passing material B and cushioning material B are one setup change object used in two processes. For cushioning material A, raw material A, which has a CO2 emission of 8 tCO2, is used as the raw material. First, a melting process is carried out in a melting furnace, and the CO2 emission for this melting process is 6 tCO2. Next, a hot rolling process is carried out using hot rolling equipment, and the CO2 emission for this hot rolling process is 6 tCO2. Next, a cold rolling process is carried out using cold rolling equipment, and the CO2 emission for this cold rolling process is 4 tCO2. Then, a heat treatment process is carried out in an annealing furnace, and buffer material A is used as a buffer material in this heat treatment process. The CO2 emissions related to this heat treatment process are 3 tCO2. The CO2 emissions related to buffer material A are 27 tCO2 (= 8 + 6 + 6 + 4 + 3). For pre-pass material A, raw material B, whose raw material CO2 emissions are 3 tCO2, is used as the raw material. First, a melting process is carried out in a melting furnace, and the CO2 emissions related to this melting process are 12 tCO2. Then, a hot rolling process is carried out in hot rolling equipment, and pre-pass material A is used as the pre-pass material in this hot rolling process. The CO2 emissions related to this hot rolling process are 8 tCO2. The CO2 emissions related to pre-pass material A are 23 tCO2 (= 3 + 12 + 8). The pre-threaded material B and buffer material B use raw material C, which has a raw material-related CO2 emission of 4 tCO2, as the raw material. First, a melting process is carried out in a melting furnace, with the CO2 emission related to this melting process being 10 tCO2. Next, a hot rolling process is carried out in hot rolling equipment, with the pre-threaded material B and buffer material B being used as the first pre-threaded material in this hot rolling process, with the CO2 emission related to this hot rolling process being 12 tCO2. Next, a heat treatment process is carried out in an annealing furnace, with the pre-threaded material B and buffer material B being used as the second buffer material in this heat treatment process, with the CO2 emission related to this heat treatment process being 5 tCO2. The CO2 emissions related to the pre-threaded material B and buffer material B will be described later.

[0046] This product information and information on items for setup change are stored in advance in storage unit 5 before the start of calculation of CO2 emissions. The product information and information on items for setup change may be input from input unit 2, may be input from a storage medium (e.g., a USB memory or an SD card (registered trademark)) that stores the product information and information on items for setup change via IF unit 4, may be input from a storage medium (e.g., a CD-R or a DVD-R) that stores the product information and information on items for setup change via its drive device and IF unit 4, or may be input from a management server device that manages the product information and information on items for setup change via a communication network and IF unit 4.

[0047] Returning to Fig. 1, the control processing unit 1 is a circuit that controls each of the units 2 to 5 of the carbon dioxide emission calculation device 1000 according to the function of each unit, and calculates the CO2 emission amount for a target product of a target type. The control processing unit 1 is configured to include, for example, a CPU (Central Processing Unit) and its peripheral circuits. By executing the control processing program, the control processing unit 1 is functionally configured to include a control unit 11, a total emission amount calculation unit 12 for setup replacement materials, an allocation amount calculation unit 13, an emission calculation unit 14, and an allocation amount calculation unit 15.

[0048] The control unit 11 controls each of the units 2 to 5 of the carbon dioxide emission calculation device 1000 according to the function of each unit, and is in charge of overall control of the carbon dioxide emission calculation device 1000.

[0049] When one setup item is used in multiple processes during a given period, the allocation amount calculation unit 15 calculates, for each of the multiple processes, an allocation amount for allocating the CO2 emissions related to the setup item in that process to that process and each subsequent process that uses the setup item at a predetermined second rate, and allocates each of the calculated allocation amounts to the CO2 emissions related to that process and each subsequent process that uses the setup item. Since the carbon dioxide emission calculation system 1000 in this embodiment calculates the total CO2 emissions related to the setup item for each of the multiple processes, when one setup item is used in multiple processes, it is necessary to divide the CO2 emissions related to the setup item for each process in which the setup item is used. Therefore, the allocation amount calculation unit 15 calculates each allocation amount to be distributed to each of the multiple processes that use one setup item. For example, in the example shown in Figures 2 to 5, the pre-passed material B and buffer material B are used as the pre-passed material B in the hot rolling process, and then used as buffer material B in the heat treatment process. Therefore, the allocation amount calculation unit 15 calculates the CO2 emissions related to the pre-passed material B in the hot rolling process, 26 [tCO2] (= 4 + 10 + 12), to be allocated at a predetermined second rate to the hot rolling process and to the heat treatment process using the pre-passed material B (pre-passed material B and buffer material B) after the hot rolling process. The predetermined second rate is, for example, an equal rate that is allocated equally among the multiple processes. In this example, the pre-passed material B and buffer material B are used in both the hot rolling process and the heat treatment process, so the predetermined second rate is 1 / 2. Therefore, the allocation amount calculation unit 15 calculates 13 [tCO2] (= 26 / 2) as the allocation amount for the hot rolling process, and 13 [tCO2] (= 26 / 2) as the allocation amount for the heat treatment process. Therefore, the CO2 emissions related to the pre-pass material B are 13 [tCO2], and 5 [tCO2] are emitted in the heat treatment process, so the CO2 emissions related to the buffer material B are 18 [tCO2] (= 13 + 5).

[0050] Alternatively, for example, one changeable item X may be a changeable item a α And changeover items a β And changeover items aγ are used in three processes α, β, and γ, respectively, and process β is carried out via process δ after process α, and process γ is carried out via process ε after process β, and the CO2 emissions related to the changeover item X in process α are b α [tCO2], and the CO2 emissions related to the changeover item X in the δ process are b δ [tCO2], and the CO2 emissions related to the changeover material X in the β process are b β [tCO2], and the CO2 emissions related to the changeover material X in the ε process are b ε [tCO2], and the CO2 emissions related to the changeover material X in the γ process are b γ [tCO2], the cost of replacement items a α The CO2 emissions related to b α / 3 [tCO2], and the cost of changeover items a β The CO2 emissions related to b α / 3+(b δ +b β ) / 2 [tCO2], and the changeover items a γ The CO2 emissions related to b α / 3+(b δ +b β ) / 2+b ε +b γ [tCO2].

[0051] The total emission amount of setup replacement objects calculating unit 12 calculates, for each of a plurality of processes used in the manufacture of products manufactured during a predetermined period, the total amount of CO2 emissions during the predetermined period related to the setup replacement objects used in that process, if that process is a process using the setup replacement objects. More specifically, when the same type of process is carried out using a single piece of equipment, or when the same type of process is carried out using a plurality of pieces of equipment without distinguishing between the plurality of pieces of equipment, the total emission amount of setup replacement objects calculating unit calculates, for each of a plurality of processes (i.e., a plurality of pieces of equipment) used in the manufacture of products manufactured during the predetermined period, the total amount of CO2 emissions during the predetermined period related to the setup replacement objects used in that process, if that process is a process using the setup replacement objects. When the same type of process is carried out using multiple pieces of equipment and the multiple pieces of equipment are distinguished (i.e., when the same type of process is considered to be multiple processes that differ for each piece of equipment, in other words, when the processes are categorized by combinations of process and equipment), the total emission amount calculation unit for setup replacement items calculates, for each of the multiple processes used in the manufacture of products manufactured during the specified period and for each piece of equipment used to carry out the process, if the process is a process using the setup replacement item, the total amount of CO2 emissions for the setup replacement item during the specified period.

[0052] For example, in the example shown in Figures 2 to 5, the products manufactured during the specified period are products with product specifications A, B, and C. The multiple processes used to manufacture these products with product specifications A, B, and C are a melting process, a hot rolling process, a cold rolling process, a heat treatment process, and a cutting process. For simplicity's sake, in the examples shown in Figures 2 to 5, processes with the same name are assumed to use the same equipment. However, as described above, when processes with the same name are performed using different equipment and the different equipment is distinguished, the multiple processes include the processes distinguished by equipment. For example, when a hot rolling process is performed using equipment A and equipment B, the multiple processes include the hot rolling process of equipment A and the hot rolling process of equipment B. The total discharge amount calculation unit 12 for setup replacement materials determines whether each of the melting process, hot rolling process, cold rolling process, heat treatment process, and cutting process is a process using the setup replacement material. As a result of this determination, of the melting process, hot rolling process, cold rolling process, heat treatment process, and cutting process, the processes using setup replacement objects are the hot rolling process and the heat treatment process, so the setup replacement object total emission calculation unit 12 calculates the total CO2 emissions from setup replacement objects for each of the hot rolling process and the heat treatment process. More specifically, as shown in Figure 6, the total CO2 emissions from setup replacement objects in the hot rolling process is 36 [tCO2] (= 23 + 13), which is the sum of 23 [tCO2] of the CO2 emissions from pre-passed material A and 13 [tCO2] of the CO2 emissions from pre-passed material B (pre-passed material B and buffer material B), and the total CO2 emissions from setup replacement objects in the heat treatment process is 45 [tCO2] (= 27 + 18), which is the sum of 27 [tCO2] of the CO2 emissions from buffer material A and 18 [tCO2] of the CO2 emissions from buffer material B (pre-passed material B and buffer material B).

[0053] The allocation amount calculation unit 13 calculates, for each of a plurality of processes used in the production of the target product of the target type, when the process is a process using the setup replacement object, as an allocation amount, a predetermined first ratio of the total CO2 emissions from the setup replacement object calculated for the process by the setup replacement object total emission calculation unit 12. For example, the allocation amount calculation unit 13 calculates the allocation amount by setting the ratio of the CO2 emissions from the process used in the production of the target product of the target type to the total amount of CO2 emissions from the process during the predetermined period as the predetermined first ratio (the first aspect). In the example shown in Figures 2 to 5, as shown in Figure 7, the CO2 emissions related to the hot rolling process for a product with product specification A are 30 [tCO2], the CO2 emissions related to the hot rolling process for a product with product specification B are 50 [tCO2], and the CO2 emissions related to the hot rolling process for a product with product specification C are 40 [tCO2], so the allocation amount of the product with product specification A in the hot rolling process is 9 [tCO2] (= 36 × (30 / (30 + 50 + 40)), the allocation amount of the product with product specification B in the hot rolling process is 15 [tCO2] (= 36 × (50 / (30 + 50 + 40)), and the allocation amount of the product with product specification C in the hot rolling process is 12 [tCO2] (= 36 × (40 / (30 + 50 + 40)).

[0054] Alternatively, for example, the allocation amount calculation unit 13 calculates the allocation amount by setting the ratio of the processing amount or processing time processed in the process used in manufacturing the target product of the target type to the total amount processed in the process during the specified period as the specified first ratio (the second aspect). In the examples shown in Figures 2 to 5, in the case of the processing amount, as shown in Figure 9, the processing amount of the hot rolling process for the product with product specification A is 40 [tons], the processing amount of the hot rolling process for the product with product specification B is 60 [tons], and the processing amount of the hot rolling process for the product with product specification C is 50 [tCO2], so the allocation amount of the product with product specification A in the hot rolling process is 9.6 [tCO2] (= 36 × (40 / (40 + 60 + 50)), the allocation amount of the product with product specification B in the hot rolling process is 14.4 [tCO2] (= 36 × (60 / (40 + 60 + 50)), and the allocation amount of the product with product specification C in the hot rolling process is 12 [tCO2] (= 36 × (50 / (40 + 60 + 50)). The processing time can also be calculated in the same way as the processing amount.

[0055] The emission amount calculation unit 14 calculates a new CO2 emission amount for the target product of the target type by adding the allocation amount calculated for each of the multiple processes used in the production of the target product of the target type, when the process is a process using the setup change material, to the CO2 emission amount for the target product of the target type. In the examples shown in Figures 2 to 5, in the case of the first embodiment, as shown in Figure 8, for a product with product specification A, by adding the hot rolling allocation amount of 9 [tCO2] to the original CO2 emissions of 160 [tCO2] (= 50 + 40 + 30 + 10 + 30) for the product with product specification A before adding the allocation amount, a new CO2 emissions of 169 [tCO2] (= 160 + 9) for the product with product specification A is obtained. By adding the heat treatment allocation amount of 13.5 [tCO2] to this new CO2 emissions of 169 [tCO2] for the product with product specification A, a new CO2 emissions of 182.5 [tCO2] (= 169 + 13.5) for the product with product specification A is obtained. As there are no further allocation amounts to be added, this is the final CO2 emissions for the product with product specification A.

[0056] Figure 8 also shows the production volume and CO2 emissions per unit (unit CO2 emissions). For example, for a product with product specification A, the production volume is 30 tons, so the unit CO2 emissions is 6.08 tCO2 / ton (= 182.5 / 30, rounded to the third decimal place).

[0057] In the second embodiment, as shown in FIG. 10 , for a product with product specification A, by adding the hot rolling allocation of 9.6 [tCO2] to the original CO2 emissions of 160 [tCO2] (= 50 + 40 + 30 + 10 + 30) for the product with product specification A before adding the allocation amount, a new CO2 emissions of 169.6 [tCO2] (= 160 + 9.6) for the product with product specification A is obtained. By adding the heat treatment allocation of 16.875 [tCO2] to this new CO2 emissions of 169.6 [tCO2] for the product with product specification A, a new CO2 emissions of 186.475 [tCO2] (= 169.6 + 16.875) for the product with product specification A is obtained. Since there are no further allocation amounts to add, this is the final CO2 emissions for the product with product specification A.

[0058] Note that Figure 10 also shows the production volume and CO2 emissions per unit (unit CO2 emissions), just like Figure 8. For example, for a product with product specification A, the production volume is 30 [tons], so the unit CO2 emissions is 6.22 [tCO2 / ton] (= 186.475 / 30, rounded to the third decimal place).

[0059] The control processing unit 1, input unit 2, output unit 3, IF unit 4 and storage unit 5 in the carbon dioxide emission calculation device 1000, which is an example of a carbon dioxide emission calculation system, can be configured by, for example, a desktop computer, a notebook computer, etc. Of course, as described above, the carbon dioxide emission calculation system may be configured by a plurality of computers connected to each other so that they can communicate with each other.

[0060] Next, the operation of this embodiment will be described below: Fig. 11 is a flowchart showing the operation of the carbon dioxide emission calculation system (one example of the carbon dioxide emission calculation device).

[0061] When the carbon dioxide emission calculation device 1000 having such a configuration is powered on, it initializes the necessary parts and starts operation. By executing the control processing program, the control processing unit 1 is functionally configured to include a control unit 11, a total emission amount calculation unit 12 for setup replacement materials, an allocation amount calculation unit 13, an emission calculation unit 14, and an allocation amount calculation unit 15.

[0062] 11 , the carbon dioxide emission calculation device 1000 first executes preprocessing using the control processing unit 1 to calculate the CO2 emissions associated with a target product of a target type (S1). In this embodiment, when a single replating object is used in multiple processes during a predetermined period, the carbon dioxide emission calculation device 1000 calculates, for each of the multiple processes, an allocation amount for allocating the CO2 emissions associated with the replating object in that process to the process in question and subsequent processes that use the replating object at a predetermined second rate using the allocation amount calculation unit 15 of the control processing unit 1, and allocates the calculated allocation amounts to the CO2 emissions associated with the process in question and subsequent processes that use the replating object. If the basic information storage unit 51 does not store product information and replating object information, the carbon dioxide emission calculation device 1000 may receive the product information and replating object information in this preprocessing and store them in the basic information storage unit 51.

[0063] Next, the carbon dioxide emission calculation device 1000, using the total emission calculation unit 12 of the setup replacement items of the control processing unit 1, calculates, for each of a plurality of processes used in the manufacture of the products manufactured during the specified period, if the process is a process using the setup replacement items, the total amount of CO2 emissions during the specified period related to the setup replacement items used in the process as the total CO2 emissions from the setup replacement items (S2).

[0064] Next, the carbon dioxide emission amount calculation device 1000 calculates, for each of the multiple processes used in the manufacture of the target product of the target type, a predetermined first ratio of the total CO2 emission amount of the setup replacement items calculated by the setup replacement item total emission calculation unit 12 for that process as an allocation amount, if that process is a process using the setup replacement items (S3).

[0065] Next, the carbon dioxide emission calculation device 1000 calculates a new CO2 emission amount for the target product of the target type by adding the allocation amount calculated by the allocation amount calculation unit 13 for each of the multiple processes used in the manufacture of the target product of the target type, if the process is a process using the setup change material, to the CO2 emission amount for the target product of the target type (S4). In the examples shown in Figures 2 to 10, the final CO2 emissions for the product of product specification A, the product of product specification B, and the product of product specification C are calculated in Figures 8 and 10, respectively, but if the target product of the target type is a product of product specification C, the carbon dioxide emission calculation device 1000 only needs to calculate the final CO2 emission amount for the product of product specification C.

[0066] Then, the carbon dioxide emission amount calculation device 1000 causes the control unit 11 of the control processing unit 1 to output the final CO2 emission amount for the target product of the target type from the output unit 3 (S5), and ends this process. Note that the control unit 11 may output each calculation result of each process S1 to S3 from the output unit 3. Furthermore, the control unit 11 may output the final CO2 emission amount for the target product of the target type and each calculation result to an external device via the IF unit 4 as necessary.

[0067] As described above, the carbon dioxide emission calculation system (one example of a carbon dioxide emission calculation device) 1000 according to the embodiment, and the carbon dioxide emission calculation method and carbon dioxide emission calculation program implemented therein, calculate the total amount of CO2 emissions related to the setup replacement object over a predetermined period for each process that uses the setup replacement object, and allocate this calculated total amount to products manufactured through the process that uses the setup replacement object at a predetermined first rate. Therefore, the carbon dioxide emission calculation system (carbon dioxide emission calculation device) S, carbon dioxide emission calculation method, and carbon dioxide emission calculation program can calculate the amount of carbon dioxide emissions related to a product by taking into account the amount of carbon dioxide emissions associated with the use of the setup replacement object. In particular, because a predetermined allocation amount is allocated to a process (specific process) that uses the setup replacement object, it is possible to appropriately calculate the amount of CO2 emissions related to a product that undergoes the specific process and the amount of CO2 emissions related to a product that does not undergo the specific process.

[0068] According to the first aspect of this embodiment, it is possible to provide a carbon dioxide emission calculation system (carbon dioxide emission calculation device) S, a carbon dioxide emission calculation method, and a carbon dioxide emission calculation program for calculating an allocation amount based on a CO2 emission rate.

[0069] According to the second aspect of this embodiment, it is possible to provide a carbon dioxide emission calculation system (carbon dioxide emission calculation device) S, a carbon dioxide emission calculation method, and a carbon dioxide emission calculation program that calculate an allocation amount based on a processing amount or a processing time ratio.

[0070] The carbon dioxide emission calculation system (carbon dioxide emission calculation device) S, carbon dioxide emission calculation method, and carbon dioxide emission calculation program allocate the CO2 emissions related to a setup change object in a given process to that process and to each process that uses the setup change object after that process. Therefore, even if one setup change object is used in multiple processes, it is possible to avoid double counting of the CO2 emissions of the setup change object in the processes that use that setup change object, and it is possible to appropriately determine the CO2 emissions related to the setup change object.

[0071] In the above-described embodiment, the setup replacement object is produced through the same processes as the finished product, from raw materials to the setup replacement object utilization process. However, the setup replacement object itself may be procured and used in the setup replacement object utilization process. In this case, the CO2 emissions related to the setup replacement object are the sum of the CO2 emissions related to the setup replacement object itself and the CO2 emissions related to the setup replacement object utilization process. For example, if pre-passed material A itself is procured, and the CO2 emissions related to the pre-passed material A itself are 10 tCO2, and the CO2 emissions related to the hot rolling process using the pre-passed material A as the setup replacement object are 8 tCO2, the CO2 emissions related to the pre-passed material A used to calculate the total CO2 emissions of the setup replacement object are 18 tCO2 (= 10 + 8).

[0072] In order to express the present invention, the present invention has been properly and sufficiently described above through the embodiments with reference to the drawings, but it should be recognized that those skilled in the art can easily change and / or improve the above-mentioned embodiments. Therefore, unless the changes or improvements made by those skilled in the art are at a level that causes departure from the scope of the claims described in the claims, such changes or improvements are interpreted as being included in the scope of the claims. [Explanation of symbols]

[0073] 1000 Carbon dioxide emission calculation system (one example of a carbon dioxide emission calculation device) 1 Control processing section 2 Input section 3 Output section 4 Interface section (IF section) 5 Storage section 11 Control section 12 Total discharge amount calculation unit for changeover materials 13 Allocation amount calculation unit 14 Emission calculation section 15 Allocation amount calculation unit 51 Basic information storage section

Claims

1. CO2 emissions related to target products of a target type manufactured during a specified period in a factory capable of manufacturing multiple types of products that are manufactured from raw materials through multiple processes. ２ A carbon dioxide emission calculation system for calculating an emission amount, The plurality of steps includes a step of utilizing a setup change object, which is a step of utilizing a setup change object that is an object used in the setup change, For each of the multiple processes used in the manufacture of the products manufactured during the specified period, if the process is a process using the replacement material, CO2 related to the replacement material used in the process ２ The total amount of CO emissions during the specified period is used for setup changeover. ２ a total discharge calculation unit for calculating the discharge amount of setup change materials; For each of a plurality of processes used in the manufacture of the target product of the target type, if the process is a process using the set-up replacement material, the total CO2 emissions of the set-up replacement material calculated by the set-up replacement material total emission calculation unit for the process ２ an allocation amount calculation unit that calculates a predetermined first ratio of the discharged amount as an allocation amount; For each of a plurality of processes used in the manufacture of the target product of the target type, if the process is a process using the setup change material, the allocation amount calculated by the allocation amount calculation unit for the process is used as a CO ２ By adding it to the CO emissions of the new target product of the target type, ２ a discharge amount calculation unit for calculating a discharge amount, Carbon dioxide emissions calculation system.

2. The allocation calculation unit calculates the CO ２ CO emissions related to the process used in the manufacture of the target product of the target type relative to the total amount during the specified period ２ The allocation amount is calculated by setting the rate of discharge as the predetermined first rate. The carbon dioxide emission calculation system according to claim 1 .

3. the allocation amount calculation unit calculates the allocation amount by setting the ratio of the processing amount or processing time processed in the process used in the production of the target product of the target type to the total amount processed in the process during the predetermined period as the predetermined first ratio; The carbon dioxide emission calculation system according to claim 1 .

4. When one replacement item is used in a plurality of steps during the predetermined period, the CO ２ A distribution amount for distributing the CO emissions to the process and to each of the processes using the changeover item after the process at a predetermined second ratio is calculated, and the calculated distribution amount is used as a CO ２ Further, an allocation amount calculation unit is provided to allocate the amount to the discharge amount. The carbon dioxide emission calculation system according to claim 1 .

5. CO2 emissions related to target products of a target type manufactured during a specified period in a factory capable of manufacturing multiple types of products that are manufactured from raw materials through multiple processes. ２ A carbon dioxide emission calculation method for calculating an emission amount, The plurality of steps includes a step of utilizing a setup change object, which is a step of utilizing a setup change object that is an object used in the setup change, For each of the multiple processes used in the manufacture of the products manufactured during the specified period, if the process is a process using the replacement material, CO2 related to the replacement material used in the process ２ The total amount of CO emissions during the specified period is used for setup changeover. ２ a step of calculating a total amount of discharge of materials for setup change obtained as a discharge amount; For each of a plurality of processes used in the manufacture of the target product of the target type, if the process is a process using the setup replacement material, the total CO2 emissions of the setup replacement material calculated in the setup replacement material total emission calculation step for the process ２ an allocation amount calculation step of calculating a predetermined first ratio of the discharge amount as an allocation amount; For each of a plurality of processes used in the manufacture of the target product of the target type, if the process is a process using the changeover material, the allocation amount calculated for the process in the allocation amount calculation step is used as a CO ２ By adding it to the CO emissions of the new target product of the target type, ２ and a discharge amount calculation step for calculating a discharge amount. Carbon dioxide emissions calculation method.

6. CO2 emissions related to target products of a target type manufactured during a specified period in a factory capable of manufacturing multiple types of products that are manufactured from raw materials through multiple processes. ２ A carbon dioxide emission calculation program for determining an emission amount, the carbon dioxide emission calculation program causing a computer to function as the carbon dioxide emission calculation system according to any one of claims 1 to 4.

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