Carbon dioxide emission calculation system, and method and program thereof

Abstract

To provide a carbon dioxide emissions calculation system capable of calculating CO2 emissions even when separation occurs; and to provide a method thereof and a program thereof.SOLUTION: Provided is a carbon dioxide emissions calculation system for calculating CO2 emissions related to target products manufactured during a prescribed period at a factory where products of a plurality of types can be manufactured through a plurality of processes starting from treating raw materials. The plurality of processes includes a specific process in which separated inventory considered to be in stock occurs when separation from a body occurs during treatment. In the system, separated inventory raw materials CO2 emissions α1 pertaining to the separated inventory, among raw materials CO2 emissions, is calculated; with regard to each of processes pertaining to the target products from an initial process to the specific process, in the process, separated inventory processes CO2 emissions α2, α3 and α4 pertaining to the separated inventory, among processes CO2 emissions pertaining to the process, are calculated; and the sum of the separated inventory raw materials CO2 emissions α1 and each of these CO2 emissions α2, α3 and α4 is calculated as separated inventory CO2 emissions αS.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 determining the CO2 emissions associated with products manufactured through multiple processes, including a process that produces separated inventory items that are separated from the main body during processing and kept in inventory. [Background technology]

[0002] In recent years, carbon dioxide emissions have been of interest from the viewpoint of protecting the global environment, etc. Such technology relating to carbon dioxide emissions is disclosed in, for example, Patent Document 1.

[0003] The carbon traceability management system disclosed in Patent Document 1 includes a utility management means for recording and managing the power received from outside, the amount of hot and cold energy received, the operation record of the private power generation facility, and the operation record of the hot and cold energy facility, a material management means for recording and managing the usage record of materials and raw materials, a facility management means for managing and recording the energy used by the facility equipment during the manufacturing period, a manufacturing execution management means for managing the production record of the product, an emission calculation means for calculating the greenhouse gas emission amount from each of the records recorded and managed by the utility management means, the material management means, the facility management means, and the manufacturing execution management means, and a manufacturing control means for calculating the greenhouse gas emission amount calculated by the emission calculation means as one unit amount of the product. The carbon traceability management system has an emission allocation means for allocating the greenhouse gas emissions to the production lot, and classifies the power equipment that operates by receiving energy from the primary power equipment as secondary power equipment, and classifies non-power equipment that operates by receiving energy from the primary power equipment and secondary power equipment as tertiary equipment, with respect to the equipment classified as primary power equipment such as boilers, power receiving equipment, private power generation equipment, and water supply equipment. The emission allocation means allocates the greenhouse gas emissions of the product lot based on the usage status corresponding to the product lot of the tertiary equipment and the usage status corresponding to the product lot of the secondary equipment, and has an emission management means for managing the greenhouse gas emissions allocated to the production lot as unique data of the production lot. This carbon traceability management system allocates the greenhouse gas emissions associated with the discarded production lot and cleaning work as the emission amount of the product lot according to a certain rule. More specifically, the greenhouse gas emissions generated by the related cleaning work and the production of the discarded lot are apportioned based on the allocation policy. Under this allocation policy, a discarded lot is allocated pro rata to each production lot of the same item produced within 60 hours, regardless of the manufacturing process of the item, in the ratio of 1 / 3. Also, if three or more lots of the same item are not produced within that time, the greenhouse gas emissions from the discarded lot remaining at the time that the time has elapsed are allocated to the first production lot of the same item produced after that time has elapsed. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 5097728 (JP 2010-191832 A) Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, the carbon traceability management system disclosed in Patent Document 1 can manage CO2 emissions on a lot-by-lot basis, but cannot manage (calculate) the CO2 emissions of separated matter that is separated from the main body during processing in a process, which is not on a lot-by-lot basis.

[0006] The present invention has been made in consideration of the above-mentioned 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 calculate CO2 emissions even when separated inventory items are generated that are separated from the main body during processing and kept in inventory. [Means for solving the problem]

[0007] As a result of various investigations, the inventors of the present invention 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 related to target products manufactured in a predetermined period in a factory capable of manufacturing multiple types of products manufactured from raw materials through multiple processes, the multiple processes including a specific process in which a separated inventory is generated that is separated from the main body during processing and stored in inventory, the system includes a first emission calculation unit that calculates a separated inventory raw material CO2 emission related to the separated inventory from the raw material CO2 emissions of the raw materials, a second emission calculation unit that calculates a process CO2 emission related to each of the multiple processes from a first process to the specific process among the multiple processes for manufacturing the target product, and calculates a separated inventory process CO2 emission related to the separated inventory at the process from the calculated process CO2 emissions, and a separated inventory emission calculation unit that calculates the sum of the separated inventory raw material CO2 emission and each separated inventory process CO2 emission calculated for each of the processes from the first process to the specific process as a separated inventory CO2 emission. Preferably, in the above-mentioned carbon dioxide emission calculation system, the first emission calculation unit calculates separated inventory raw material CO2 emission by multiplying the raw material CO2 emission of the raw material by a ratio of the separated inventory amount to the raw material amount of the raw material. Preferably, in the above-mentioned carbon dioxide emission calculation system, the second emission calculation unit calculates separated inventory process CO2 emission of the process by multiplying the calculated process CO2 emission of the process by a ratio of the separated inventory amount to the processed material amount of the process.

[0008] This type of carbon dioxide emission calculation system calculates the CO2 emission from separated inventory by the sum of the CO2 emission from the separated inventory raw materials and the CO2 emission from each separated inventory process calculated for each process from the first process to a specific process, so it is possible to calculate the CO2 emission even when separated items, in this case separated inventory items, are generated.

[0009] In another aspect, the above-mentioned carbon dioxide emission calculation system further includes a total process emission calculation unit that calculates, for each of a plurality of processes for producing the target product, the process CO2 emission amount associated with that process and calculates the sum of the raw material CO2 emission amount and the process CO2 emission amount calculated for each of the plurality of processes for producing the target product as the total process CO2 emission amount, and a first product emission calculation unit that calculates product CO2 emission amount associated with the target product by subtracting the separated inventory CO2 emission amount calculated from the total process CO2 emission amount. Preferably, in the above-mentioned carbon dioxide emission calculation system, when there are a plurality of target products classified in the same category during the predetermined period, the system further includes an aggregation calculation unit, in which the first emission calculation unit calculates the separated inventory raw material CO2 emission amount for each of the plurality of target products, the second emission calculation unit calculates the separated inventory process CO2 emission amount for each of the plurality of target products, the separated inventory emission calculation unit calculates the separated inventory CO2 emission amount for each of the plurality of target products, and the aggregation calculation unit calculates the sum of the separated inventory CO2 emissions calculated for each of the plurality of target products as an aggregated separated inventory CO2 emission amount, and calculates the sum of the product CO2 emissions calculated for each of the plurality of target products as an aggregated product CO2 emission amount. Preferably, in the above-mentioned carbon dioxide emission calculation system, the target products are metal products and are classified by component composition. Preferably, in the above-mentioned carbon dioxide emission calculation system, the target products are classified by product type name. Preferably, in the above-mentioned carbon dioxide emission calculation system, the target products are classified by consumer name.Preferably, in the above-mentioned carbon dioxide emission calculation system, when the plurality of processes includes a plurality of specific processes, the first emission calculation unit calculates, for each of the plurality of specific processes, the separated inventory raw material CO2 emission amount at that specific process, the second emission calculation unit calculates, for each of the plurality of specific processes, the separated inventory emission calculation unit calculates, for each of the plurality of specific processes, the separated inventory CO2 emission amount at that specific process, and the first product emission calculation unit calculates the product CO2 emission amount related to the target product by subtracting the separated inventory CO2 emission amount calculated for each of the plurality of specific processes from the calculated total process CO2 emission amount.

[0010] Such a carbon dioxide emission calculation system can determine the product CO2 emission amount related to the target product by subtracting the separated inventory CO2 emission amount from the total process CO2 emission amount.

[0011] In another aspect, the carbon dioxide emission calculation system further includes a first unit amount calculation unit that calculates a first unit separated inventory CO2 emission, which is a CO2 emission amount per unit amount related to the separated inventory.

[0012] Such a carbon dioxide emission calculation system can determine a first unit separated inventory CO2 emission, which is a CO2 emission amount per unit amount related to the separated inventory.

[0013] In another aspect, the above-mentioned carbon dioxide emission calculation system further includes a second unit amount calculation unit that calculates a second unit separated inventory CO2 emission, which is the CO2 emission per unit amount for the multiple separated inventory items when there are multiple separated inventory items that are classified as the same during the specified period.

[0014] Such a carbon dioxide emission calculation system can obtain a second unit separated inventory CO2 emission, which is a CO2 emission per unit amount for a plurality of separated inventory items classified in the same manner.

[0015] In another aspect, the above-mentioned carbon dioxide emission calculation system further includes a utilization separated inventory emission calculation unit that, when there are multiple separated inventory items classified as the same during the specified period, calculates the CO2 emission amount for separated inventory items that are used as product materials among the multiple separated inventory items as the utilization separated inventory CO2 emission amount.

[0016] Such a carbon dioxide emission calculation system can obtain the amount of CO2 emission related to the separated inventory used as a product material (CO2 emission from used separated inventory).

[0017] In another aspect, in the carbon dioxide emission calculation system described above, a total process emission calculation unit calculates, for each of a plurality of processes for manufacturing the target product, a process CO2 emission amount related to that process, and calculates a sum of the raw material CO2 emission amount and each process CO2 emission amount calculated for each of the plurality of processes for manufacturing the target product as a total process CO2 emission amount; and when there are a plurality of separated inventory items classified in the same manner during the specified period, calculates a ratio of the number of separated inventory items used as product materials to a first total amount of the plurality of separated inventory items. and a product emission recalculation unit that calculates a product CO2 emission amount related to the target product again by calculating a scrap rate which is a ratio of a second total amount of separated inventory items excluding separated inventory items that have been used as product materials, or a utilization rate which is a ratio of a third total amount of the plurality of separated inventory items that have been used as product materials to a first total amount of the plurality of separated inventory items, and subtracting a multiplication result of the calculated separated inventory CO2 emission amount by (1 - the scrap rate) or a multiplication result of the calculated separated inventory CO2 emission amount by the utilization rate from the calculated total process CO2 emission amount.

[0018] Such a carbon dioxide emission calculation system can recalculate the product CO2 emissions related to the target product, and allocate the separated inventory CO2 emissions of separated inventory, excluding separated inventory items used as product materials, to the product CO2 emissions related to the target product.

[0019] In another aspect, in the above-mentioned carbon dioxide emission calculation system, when a product is manufactured using the separated inventory as a product material, the separated inventory CO2 emission is used as the raw material CO2 emission to calculate product CO2 emission related to the product. Here, when the specific process is not included in the multiple processes for manufacturing the product, the carbon dioxide emission calculation system further includes a second product emission calculation unit that calculates, for each of the multiple processes for manufacturing the product, the process CO2 emission related to the process, and calculates the sum of the raw material CO2 emission and each process CO2 emission calculated for each of the multiple processes for manufacturing the product as the product process CO2 emission.

[0020] When a product is manufactured using separated inventory items as product materials, such a carbon dioxide emission calculation system can calculate the product CO2 emissions related to the product by setting the separated inventory CO2 emissions of the separated inventory items as the raw material CO2 emissions.

[0021] A carbon dioxide emission calculation method according to another aspect of the present invention is a method for calculating CO2 emissions related to target products manufactured during a specified period in a factory capable of manufacturing a plurality of types of products from raw materials through a plurality of processes, the plurality of processes including a specific process that generates a separated inventory item that is separated from a main body during processing and stored as inventory, and the method includes a first emission calculation step of calculating a separated inventory raw material CO2 emission amount related to the separated inventory item from the raw material CO2 emissions of the raw materials; a second emission calculation step of calculating, for each of a plurality of processes for manufacturing the target product from a first process to the specific process, a process CO2 emission amount related to the corresponding process, and calculating a separated inventory process CO2 emission amount related to the separated inventory item at the corresponding process from the calculated process CO2 emissions; and a separated inventory emission calculation step of calculating a sum of the separated inventory raw material CO2 emission amount and each separated inventory process CO2 emission amount calculated for each of the processes from the first process to the specific process as a separated inventory CO2 emission amount.

[0022] This carbon dioxide emission calculation method calculates the separated inventory CO2 emission amount by adding up the separated inventory raw material CO2 emission amount and each separated inventory process CO2 emission amount calculated for each process from the first process to a specific process, so that it is possible to calculate the CO2 emission amount even when separated items, in this case separated inventory items, are generated.

[0023] Another aspect of the present invention is a carbon dioxide emission calculation program that calculates CO2 emissions for a target product 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, and causes a computer to function as any of the carbon dioxide emission calculation systems described above.

[0024] This makes it possible to provide a carbon dioxide emission calculation program, which has the same effects as those of the above-mentioned carbon dioxide emission calculation systems. Effect of the Invention

[0025] The carbon dioxide emission calculation system, the carbon dioxide emission calculation method, and the carbon dioxide emission calculation program according to the present invention can calculate the amount of CO2 emission even when separated inventory items are generated. [Brief description of the drawings]

[0026] [Figure 1] FIG. 1 is a diagram for explaining an overview of a carbon dioxide emission calculation system according to an embodiment. [Diagram 2] FIG. 2 is a diagram showing a configuration of the carbon dioxide emission calculation system. [Diagram 3] FIG. 11 is a diagram for explaining product information as an example. [Figure 4] FIG. 13 is a diagram showing an example of a unit CO2 emission amount information table. [Diagram 5] 4 is a flowchart showing an operation of the carbon dioxide emission calculation system. [Figure 6]As an example, this is a diagram for explaining a method of calculating the separated inventory CO2 emissions for each of a product with a product name "P001" and a product with a product name "P002". [Figure 7] As an example, this is a diagram for explaining a method of calculating the separated inventory CO2 emissions for each of the products with the product names "P003" to "P100". [Figure 8] FIG. 13 is a diagram for explaining a method for calculating product CO2 emissions as an example. [Figure 9] FIG. 13 is a diagram for explaining a method of calculating an aggregated separated inventory CO2 emission amount, and a first and second unit separated inventory CO2 emission amount, as an example. [Figure 10] FIG. 13 is a diagram for explaining a method for calculating a scrapping rate as an example. [Figure 11] FIG. 13 is a diagram for explaining a method for recalculating product CO2 emissions as an example. [Figure 12] FIG. 13 is a diagram for explaining product information in a case where a separated inventory item is used as a product material, as an example. [Figure 13] FIG. 13 is a diagram for explaining a method for calculating product CO2 emissions when a separated inventory item is used as a product material, as an example. [Figure 14] FIG. 13 is a diagram for explaining a method for calculating CO2 emissions from separated inventory when there are multiple specific processes, as an example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] 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, configurations with the same reference numerals in each drawing indicate that they are the same configurations, 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 configuration, a reference numeral with a subscript is used.

[0028] FIG. 1 is a diagram for explaining an outline of a carbon dioxide emission calculation system in an embodiment. The carbon dioxide emission calculation system in the embodiment is a system for calculating the amount of carbon dioxide emission (CO2 emission) for a target product manufactured in a predetermined period in a factory (plant) capable of manufacturing a plurality of types of products manufactured from raw materials through a plurality of processes. This carbon dioxide emission calculation system includes, as a specific process, a process in which a separated inventory item is generated that is separated from the main body during processing and stored as inventory, and is equipped with a first emission calculation unit, a second emission calculation unit, and a separated inventory emission calculation unit. In FIG. 1, the cutting process of process 4 is an example of the specific process. In FIG. 1, raw materials and shipment are each illustrated as one of the processes, with process 1 representing raw materials and process 7 representing shipment. The first emission calculation unit calculates a separated inventory raw material CO2 emission α1 related to the separated inventory item from the raw material CO2 emission of the raw materials. The second emission calculation unit calculates the process CO2 emissions related to each process from the first process to the specific process among the multiple processes for manufacturing the target product, and calculates the separated inventory process CO2 emissions α2, α3, and α4 related to the separated inventory at the process from the calculated process CO2 emissions. The separated inventory emission calculation unit calculates the sum of the separated inventory raw material CO2 emissions α1 and the separated inventory process CO2 emissions α2, α3, and α4 calculated for each process from the first process to the specific process as separated inventory CO2 emissions αS (=α1+α2+α3+α4).

[0029] The carbon dioxide emission calculation system and the carbon dioxide emission calculation method and carbon dioxide emission calculation program implemented therein will be described in more detail below. Here, as an example, a factory (plant) capable of manufacturing a wide variety of rolled steel plates will be described, but the factory (plant) may be any as long as it can manufacture a variety of products that are manufactured through a plurality of processes, including a process in which a separated inventory is generated that is separated from the main body during processing and is stocked. The separated inventory is an item that is further stocked among the separated items that are lost during the implementation of a process and do not constitute a product, such as scraps and offcuts generated by cutting parts that do not meet quality or dimensional standards. Separate inventory is a subordinate concept of separated items. The so-called yield is determined by the amount of separated items (yield loss amount, yield loss amount, for example, separated item weight (yield loss weight) or separated item volume (yield loss volume)). Yield is generally the ratio of the amount of finished product to the amount of raw materials input, while yield loss is the opposite of yield and is the ratio of the amount of loss that occurs from raw materials to the amount of product input.

[0030] The carbon dioxide emission calculation system may be configured by connecting an input / output terminal device that inputs and outputs data, one or more calculation processing devices (e.g., a server device) that executes various calculation processes, and one or more database devices that store (manage) various data so that they can communicate with each other, or at least some of these input / output terminal devices, one or more calculation processing devices, and one or more database devices may be configured as an integrated unit and connected to the remainder so that they can communicate with each other, but here we will explain the carbon dioxide emission calculation system using an example of a carbon dioxide emission calculation device that is all integrated.

[0031] Fig. 2 is a diagram showing a configuration of the carbon dioxide emission calculation system (a carbon dioxide emission calculation device as an example). Fig. 3 is a diagram for explaining product information as an example. Fig. 4 is a diagram showing a unit CO2 emission information table as an example.

[0032] A carbon dioxide emission calculation system (a carbon dioxide emission calculation device as an example) 1000 in an 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. 2.

[0033] 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 of CO2 emissions, and various data necessary for operating the carbon dioxide emission calculation device 1000, such as the product manufacturing process and product manufacturing history, 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, LCD (liquid crystal display device), or organic EL display, or a printing device such as a printer.

[0034] The input unit 2 and the output unit 3 may be configured with a touch panel. In the case of configuring this touch panel, the input unit 2 is, for example, a resistive film type or capacitive type position input device that detects and inputs an operation position, 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. When a user touches a display position that displays 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. In 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 handle is provided.

[0035] 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 of 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.

[0036] 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.

[0037] The various predetermined programs include, for example, a control processing program, and the control processing program includes, for example, a control program, a first emission calculation program, a second emission calculation program, a separate inventory emission calculation program, a total process emission calculation program, a first product emission calculation program, a compilation calculation program, a first unit amount calculation program, a second unit amount calculation program, a use separate inventory emission calculation program, a product emission recalculation program, and a second product emission calculation program. The control program is a program that controls each of the units 2 to 5 of the carbon dioxide emission calculation device 1000 according to the function of each unit. The first emission calculation program is a program that calculates the separate inventory raw material CO2 emissions related to the separate inventory among the raw material CO2 emissions of the raw materials in the target product. The second emission calculation program is a program that calculates the process CO2 emissions related to each process from the first process to a specific process among a plurality of processes for manufacturing the target product, and calculates the separate inventory process CO2 emissions related to the separate inventory at the process among the calculated process CO2 emissions. The separated inventory emission calculation program is a program for calculating separated inventory CO2 emissions as the sum of separated inventory raw material CO2 emissions calculated by the first emission calculation program and each separated inventory process CO2 emissions calculated for each process from the first process to a specific process by the second emission calculation program. The total process emission calculation program is a program for calculating process CO2 emissions related to each of a plurality of processes for manufacturing the target product, and for calculating total process CO2 emissions as the sum of raw material CO2 emissions and each process CO2 emissions calculated for each of a plurality of processes for manufacturing the target product. The first product emission calculation program is a program for calculating product CO2 emissions related to the target product by subtracting the separated inventory CO2 emissions calculated by the separated inventory emission calculation program from the total process CO2 emissions calculated by the total process emission calculation program.The aggregation calculation program is a program for calculating the sum of the CO2 emissions of each of the separated inventory items calculated for a plurality of target products in a predetermined period as the aggregated separated inventory CO2 emissions, and for calculating the sum of the CO2 emissions of each of the target products in a predetermined period as the aggregated product CO2 emissions. The first unit amount calculation program is a program for calculating a first unit separated inventory CO2 emissions, which is the CO2 emissions per unit amount of the separated inventory items. The second unit amount calculation program is a program for calculating a second unit separated inventory CO2 emissions, which is the CO2 emissions per unit amount of the separated inventory items in a predetermined period as the CO2 emissions per unit amount of the separated inventory items in a predetermined period as the separated inventory CO2 emissions ... The product emission recalculation program is a program for, when there are multiple separated inventory items classified as the same during a specified period, calculating a scrap rate, which is the ratio of a second total amount of the multiple separated inventory items excluding the separated inventory items used as product materials to a first total amount of the multiple separated inventory items, or a utilization rate, which is the ratio of a third total amount of the multiple separated inventory items used as product materials to the first total amount of the multiple separated inventory items, and recalculating the product CO2 emissions related to the target product by subtracting the multiplication result of the calculated separated inventory CO2 emissions by (1 - the scrap rate) or the multiplication result of the calculated separated inventory CO2 emissions by the utilization rate from the calculated total process CO2 emissions. The second product emission calculation program is a program that, when the multiple processes for manufacturing a product do not include a specific process, calculates the process CO2 emissions associated with each of the multiple processes for manufacturing the product, and calculates the product process CO2 emissions as the sum of the raw material CO2 emissions and the process CO2 emissions calculated for each of the multiple processes for manufacturing the product.

[0038] The various types of predetermined data include data necessary for executing each of these programs, such as product information, unit discharge amount information, various intermediate calculation results, and final calculation results.

[0039] Such a storage unit 5 includes, for example, a ROM (Read Only Memory) which is a nonvolatile storage element, an EEPROM (Electrically Erasable Programmable Read Only Memory) which is a rewritable nonvolatile storage element, etc. The storage unit 5 also includes a RAM (Random Access Memory) which serves as a so-called working memory of the control processing unit 1 for storing data generated during execution of the predetermined program, etc. The storage unit 5 may also be configured to include a hard disk device with a relatively large storage capacity.

[0040] The storage unit 5 functionally comprises a product information storage unit 51 and a unit discharge amount information storage unit 52 in order to store the product information and the unit discharge amount information, respectively.

[0041] The product information storage unit 51 stores product information. The product information is information about a product, and is stored for each product, for example, as shown in Fig. 3, and includes raw material information 101 about raw materials for manufacturing the product, manufacturing process information 102 about a plurality of processes for manufacturing the product, product manufacturing performance information 103 about products manufactured during a predetermined period, etc.

[0042] The raw material information includes the raw material name (name of raw material) used to manufacture a product with a product name (name of product), and unit raw material CO2 emission, which is the CO2 emission per unit amount of the raw material with the raw material name, and these are stored in the product information storage unit 51 in association with the product name. The unit raw material CO2 emission is the emission of carbon dioxide emitted in relation to the raw material, for example, the CO2 emission emitted in the production of the raw material. In this embodiment, the raw material is regarded as one of the processes, and the unit raw material CO2 emission is stored in the unit emission information storage unit 52, as described below.

[0043] The manufacturing process information is information describing a plurality of processes for manufacturing a product having a product name in the order of processes, and the plurality of processes described in the order of processes are associated with the product name and stored in the product information storage unit 51. The process is represented by a process name, which is the name of the process.

[0044] The product manufacturing performance information includes the production volume (product volume, performance production volume, performance product volume) of a product with a product name manufactured in a predetermined period, and the production volume is stored in the product information storage unit 51 in association with the product name. The product manufacturing performance information also includes the processing volume of each processed material processed in each process. The predetermined period is arbitrary and is appropriately set in advance to, for example, three months, six months (half a year), one year, etc.

[0045] In this embodiment, as described above, the product is a rolled steel plate, which is an example of a metal product, and the type of the rolled steel plate (type of product) is classified, for example, by its composition. Therefore, the target product is, as an example, a metal product, and is classified by its composition (in other words, by its type name (name of type) in this example). The target product may also be classified by the name of the consumer of the product.

[0046] The unit emission amount information storage section 52 stores unit emission amount information. The unit emission amount information is the CO2 emission amount emitted in the implementation of the process, and in this embodiment, it is expressed, for example, as unit CO2 emission amount which is the CO2 emission amount per unit amount. In this embodiment, the unit amount is the weight of the processing object (processing object, (processing object) = (main body) + (separate inventory object)) processed in the implementation of the process, but is not limited thereto, and may be, for example, the volume of the processing object, or may be the processing time required for the implementation of the process.

[0047] In this embodiment, the unit emission information is stored in the unit emission information storage unit 52 in table format. The unit emission information table 200 for registering the unit emission information includes, for example, a process name field 201 for registering a process name, and a unit CO2 emission field 202 for registering a unit CO2 emission (unit process CO2 emission) [tCO2 / ton] in the process of the process name registered in the process name field 201, as shown in FIG. 4, and has a record for each process name. In this embodiment, as described above, since raw materials are considered to be one of the processes, unit raw material CO2 emission is registered in the unit emission information table 200. In this embodiment, although shipment is not directly related to the manufacture of the product, shipment is also included in one of the processes, and the unit CO2 emission of shipment (unit shipment CO2 emission) is registered in the unit emission information table 200 as unit process CO2 emission. It is not necessary for shipment to be included in one of the processes.

[0048] The control processing unit 1 is a circuit for controlling each of the units 2 to 5 of the carbon dioxide emission calculation device 1000 according to the function of each unit, and for calculating the CO2 emission amount related to the target product manufactured in a predetermined period. The control processing unit 1 is configured to include, for example, a CPU (Central Processing Unit) and its peripheral circuits. In the control processing unit 1, a control unit 11, a first emission amount calculation unit 12, a second emission amount calculation unit 13, a separate inventory emission amount calculation unit 14, a total process emission amount calculation unit 15, a first product emission amount calculation unit 16, a compilation calculation unit 17, a first unit amount calculation unit 18, a second unit amount calculation unit 19, a usage separate inventory emission amount calculation unit 20, a product emission amount recalculation unit 21, and a second product emission amount calculation unit 22 are functionally configured by executing the control processing program.

[0049] The control unit 11 controls each of the units 2 to 5 of the carbon dioxide emission calculation device 1000 in accordance with the function of each unit, and is responsible for controlling the carbon dioxide emission calculation device 1000 as a whole.

[0050] The first emission calculation unit 12 calculates the separated inventory raw material CO2 emission amount related to the separated inventory among the raw material CO2 emission amounts of the raw materials in the target product. More specifically, the first emission calculation unit 12 calculates the separated inventory raw material CO2 emission amount by multiplying the raw material CO2 emission amount of the raw material by the ratio of the separated inventory amount to the raw material amount of the raw material.

[0051] The second emission calculation unit 13 calculates the process CO2 emissions for each process from the first process to the specific process among the multiple processes for manufacturing the target product, and calculates the separate inventory process CO2 emissions for the separate inventory in the process from the calculated process CO2 emissions. More specifically, the second emission calculation unit 13 calculates the separate inventory process CO2 emissions for the process by multiplying the calculated process CO2 emissions for the process by the ratio of the separated inventory amount to the processed amount of the process.

[0052] The separated inventory emission calculation unit 14 calculates the separated inventory CO2 emission amount as the sum of the separated inventory raw material CO2 emission amount calculated by the first emission calculation unit 12 and the separated inventory process CO2 emission amount calculated for each process from the first process to a specific process by the second emission calculation unit 13.

[0053] The total process emission calculation unit 15 calculates the process CO2 emission amount related to each of the multiple processes for manufacturing the target product, and calculates the total process CO2 emission amount as the sum of the raw material CO2 emission amount and the process CO2 emission amount calculated for each of the multiple processes for manufacturing the target product.

[0054] The first product emission calculation unit 16 calculates the product CO2 emission amount related to the target product by subtracting the separated inventory CO2 emission amount calculated by the separated inventory emission calculation unit 14 from the total process CO2 emission amount calculated by the total process emission amount calculation unit 15.

[0055] When there are multiple target products in a specified period, the aggregation calculation unit 17 calculates the sum of the separate inventory CO2 emissions calculated for each of the multiple target products as the aggregated separate inventory CO2 emissions, and calculates the sum of the product CO2 emissions calculated for each of the multiple target products as the aggregated product CO2 emissions.

[0056] The first unit amount calculation unit 18 calculates the first unit separated inventory CO2 emission amount, which is the CO2 emission amount per unit amount related to the separated inventory item.

[0057] The second unit amount calculation unit 19 calculates the second unit separated inventory CO2 emission amount, which is the CO2 emission amount per unit amount for multiple separated inventory items, when there are multiple separated inventory items classified as the same during a specified period.

[0058] The separate inventory utilization emission amount calculation unit 20 calculates the CO2 emission amount relating to the separated inventory items that are used as product materials among the multiple separated inventory items when there are multiple separated inventory items that are classified as the same during a specified period.

[0059] The product emission recalculation unit 21, when there are multiple identically classified separated inventory items in a predetermined period, calculates a scrapping rate, which is a ratio of a second total amount of the multiple separated inventory items, excluding the multiple separated inventory items used as product materials, to a first total amount of the multiple separated inventory items, and subtracts a multiplication result of multiplying the calculated separated inventory CO2 emission by (1-the scrapping rate) from the calculated total process CO2 emission, thereby recalculating the product CO2 emission related to the target product. When there are multiple identically classified separated inventory items in a predetermined period, the product emission recalculation unit 21 may calculate a utilization rate, which is a ratio of a third total amount of the multiple separated inventory items used as product materials to a first total amount of the multiple separated inventory items, and subtracts a multiplication result of multiplying the calculated separated inventory CO2 emission by the utilization rate from the calculated total process CO2 emission.

[0060] When the multiple processes for manufacturing a product do not include a specific process, the second product emission calculation unit 22 calculates, for each of the multiple processes for manufacturing the product, the process CO2 emission amount associated with that process, and calculates the sum of the raw material CO2 emission amount and the process CO2 emission amount calculated for each of the multiple processes for manufacturing the product as the product process CO2 emission amount.

[0061] 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 as 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 as to be able to communicate with each other.

[0062] Next, the operation of this embodiment will be described. FIG. 5 is a flowchart showing the operation of the carbon dioxide emission calculation system. FIG. 6 is a diagram for explaining a method of calculating the separated inventory CO2 emission for each of the products with the product name "P001" and the product name "P002", as an example. FIG. 6A shows the case of the product with the product name "P001", and FIG. 6B shows the case of the product with the product name "P002". FIG. 7 is a diagram for explaining a method of calculating the separated inventory CO2 emission for each of the products with the product name "P003" and the product name "P100", as an example. FIG. 7A shows the case of the product with the product name "P003", and FIG. 7B shows the case of the product with the product name "P100". In the example shown in FIG. 6 and FIG. 7, the products are 100 pieces with the product name "P001" to the product name "P100", but the cases of each product with the product name "P004" to the product name "P099" are omitted. Fig. 8 is a diagram for explaining, as an example, a method for calculating product CO2 emissions. Fig. 9 is a diagram for explaining, as an example, a method for calculating aggregated separate inventory CO2 emissions and first and second unit separate inventory CO2 emissions. Fig. 10 is a diagram for explaining, as an example, a method for calculating scrapping rate. Fig. 11 is a diagram for explaining, as an example, a method for recalculating product CO2 emissions.

[0063] When the carbon dioxide emission calculation device 1000 configured as described above is powered on, it initializes the necessary parts and starts its operation. By executing the control processing program, the control processing unit 1 functionally configures a control unit 11, a first emission amount calculation unit 12, a second emission amount calculation unit 13, a separate inventory emission amount calculation unit 14, a total process emission amount calculation unit 15, a first product emission amount calculation unit 16, a compilation calculation unit 17, a first unit amount calculation unit 18, a second unit amount calculation unit 19, a used separate inventory emission amount calculation unit 20, a product emission amount recalculation unit 21, and a second product emission amount calculation unit 22.

[0064] When the operator (user) instructs the start of calculation from the input unit 2 after the timing at which the disposal rate (or utilization rate) becomes calculable (for example, the end of the predetermined period), the carbon dioxide emission calculation device 1000 uses the first emission calculation unit 12 of the control processing unit 1 to calculate the separated inventory raw material CO2 emission amount related to the separated inventory among the raw material CO2 emissions of the raw materials in the target product, and stores it in the storage unit 5 (S1). More specifically, the first emission calculation unit 12 calculates the separated inventory raw material CO2 emission amount by multiplying the raw material CO2 emission amount of the raw material by the ratio (ratio) of the amount of the separated inventory (separate inventory amount) to the raw material amount of the raw material ((separate inventory raw material CO2 emission amount) = (raw material CO2 emission amount) x (separate inventory amount) / (raw material amount)). The raw material CO2 emission amount is calculated by multiplying the raw material amount of the raw material by the unit raw material CO2 emission amount ((raw material CO2 emission amount) = (unit raw material CO2 emission amount) x (raw material amount of the raw material)).

[0065] Here, the operation will be specifically described in the case where there are multiple target products, more specifically, where there are multiple target products classified in the same category. More specifically, the product information shown in FIG. 3 is stored in the product information storage unit 51. The weight of a process is the weight of the processed material processed in the execution of this process, and the weight difference with the next process is the weight of the separated material in this process that is separated from the main body during processing. For example, a product with a product name "P001" goes through each of the following processes: the first process with the process name "raw material", the second process with the process name "melting and casting", the third process with the process name "extrusion 1", the fourth process with the process name "cutting", the fifth process with the process name "heat treatment", and the sixth process with the process name "shipping". The fourth process with the process name "cutting" is a specific process, and the separated material in this fourth process is stored in stock, becoming a separated stock item. The weights in each of the first to sixth processes are "26" [tons], "25" [tons], "24" [tons], "24" [tons], "16" [tons], and "16" [tons], respectively. For example, in the second process, the weight of the processed product in the second process is "25" [tons], and the weight of the processed product in the next third process is "24" [tons], so the weight of the separated product in the second process is the difference of "1" [ton], and in the fourth process, the weight of the processed product in the fourth process is "24" [tons], and the weight of the processed product in the next fifth process is "16" [tons], so the weight of the separated stock in the specific fourth process is the difference of "8" [tons]. On the other hand, there is no weight difference between the third process and the next fourth process, so there is no separated product in the third process. The unit discharge information storage unit 52 stores the unit discharge information table 200 shown in FIG. 4 as the unit discharge information.

[0066] In such an example, in each of Figures 6 and 7, the record for the first process of the process name "raw materials" lists the separated inventory raw material CO2 emissions in the rightmost column when viewed from the front. For example, in Figure 6A, the record for the first process of the process name "raw materials" lists the separated inventory raw material CO2 emissions of "32" [tCO2] (=104 x (8 / 26)) calculated by multiplying the raw material CO2 emissions of "104" [tCO2] (=4 x 26) by the ratio (ratio) of the separated inventory amount "8" [tons] to the raw material amount "26" [tons] in the rightmost column when viewed from the front.

[0067] Next, the carbon dioxide emission calculation device 1000, by the second emission calculation unit 13 of the control processing unit 1, calculates the process CO2 emission amount related to each process from the first process to the specific process among the multiple processes for manufacturing the target product, calculates the separated inventory process CO2 emission amount related to the separated inventory at each process among the calculated process CO2 emissions, and stores it in the storage unit 5 (S2). More specifically, in this embodiment, since the total process CO2 emission amount is calculated as described later, the second emission calculation unit 13 calculates the process CO2 emission amount of each of the multiple processes for manufacturing the target product by multiplying the processing amount of the processed product in the process by the unit process CO2 emission amount in the process. Then, the second emission calculation unit 13 calculates the separated inventory process CO2 emissions for each process from the first process to the specific process by multiplying the process CO2 emissions of that process by the ratio (proportion) of the separated inventory volume to the processing volume of the processed product of that process ((separated inventory process CO2 emissions) = (process CO2 emissions) × (separated inventory volume) / (processing volume)).

[0068] In the above example, in each of the records of the second to sixth processes in each of Figs. 6 and 7, the CO2 emissions of each process are described in the third column from the right when viewed from the front. For example, in Fig. 6A, the record of the second process with the process name "melting and casting" describes the process CO2 emissions of "37.5" [tons] (=25 x 1.5) obtained by multiplying the weight of the processed material in the second process "25" [tons] by the unit process CO2 emissions of "1.5" [tons] in the third column from the right when viewed from the front. And, in the record of the second process with the process name "melting and casting", the separated inventory process CO2 emissions of "12" [tons] (=37.5 x (8 / 25)) obtained by multiplying the process CO2 emissions of "37.5" [tCO2] of the second process by the ratio (ratio) of the separated inventory amount "8" [tons] to the processed amount of the processed material in the second process "25" [tons] is described in the rightmost column when viewed from the front.

[0069] Next, the carbon dioxide emission calculation device 1000 calculates, by the separated inventory emission calculation unit 14 of the control processing unit 1, the sum of the separated inventory raw material CO2 emission amount calculated by the first emission calculation unit 12 in process S1 and the separated inventory process CO2 emission amounts calculated for each process from the first process to the specific process by the second emission calculation unit 13 in process S2, as the separated inventory CO2 emission amount, and stores it in the memory unit 5 (S3).

[0070] In the above example, the separated inventory CO2 emissions are recorded in the total column on the far right side in the front view in each of Figures 6 and 7. For example, in the total column on the far right side in the front view of Figure 6A, the sum of the separated inventory raw material CO2 emissions of "32" [tCO2] and the separated inventory process CO2 emissions of "12" [tCO2], "6.4" [tCO2], and "1.6" [tCO2] calculated for each process from the first second process to the specific fourth process for manufacturing the product (target product) with the product name "P001", "52" [tCO2] (=32+12+6.4+1.6) is recorded as the separated inventory CO2 emissions.

[0071] Next, the carbon dioxide emission calculation device 1000, by the total process emission calculation unit 15 of the control processing unit 1, calculates the process CO2 emission amount related to each of the multiple processes for manufacturing the target product for that process, calculates the sum of the raw material CO2 emission amount and each process CO2 emission amount calculated for each of the multiple processes for manufacturing the target product as the total process CO2 emission amount, and stores it in the storage unit 5 (S4). In this embodiment, as described above, since the process CO2 emission amount for each process is calculated in the process S2, more specifically, the total process emission calculation unit 15 calculates the sum of the raw material CO2 emission amount and each process CO2 emission amount calculated for each of the multiple processes for manufacturing the target product as the total process CO2 emission amount, and stores it in the storage unit 5.

[0072] In the above example, the total process CO2 emissions are recorded in the third column from the right when viewed from the front in each of Figures 6 and 7. For example, the total column in the third column from the right when viewed from the front in Figure 6A records the raw material CO2 emissions of "104" [tCO2] and the CO2 emissions of each process, "37.5" [tCO2], "19.2" [tCO2], "4.8" [tCO2], "16" [tCO2], and "0.8" [tCO2], respectively, for the second to sixth processes for manufacturing a product (target product) with the product name "P001". The sum of these, 182.3 tCO2 (=104+37.5+19.2+4.8+16+0.8), is listed as the total process CO2 emissions.

[0073] Next, the carbon dioxide emission calculation device 1000 calculates the product CO2 emission amount (initial product CO2 emission amount) related to the target product by subtracting the separated inventory CO2 emission amount calculated by the separated inventory emission amount calculation unit 14 in process S4 from the total process CO2 emission amount calculated by the total process emission amount calculation unit 15 in process S4 using the first product emission amount calculation unit 16 of the control processing unit 1, and stores the product CO2 emission amount (initial product CO2 emission amount) in the memory unit 5 (S5).

[0074] In the above example, in each record for each product with the product name "P001" to "P100" in Fig. 8, the product CO2 emissions for each product are listed in the rightmost column when viewed from the front. For example, in the record for the product name "P001", the product CO2 emissions of "130.3" [tCO2] (=182.3-52) for the product with the product name "P001" calculated by subtracting the separate inventory CO2 emissions of "52" [tCO2] from the total process CO2 emissions of "182.3" [tCO2] are listed in the rightmost column when viewed from the front.

[0075] Next, the carbon dioxide emission calculation device 1000 judges whether or not each calculation in steps S1 to S5 has been performed for all target products by the control processing unit 1 (S6). If the result of this judgment is that each calculation has not been performed for all target products (No), the carbon dioxide emission calculation device 1000 returns the process to step S1 to perform the calculations for the target products that have not been performed. On the other hand, if the result of the judgment is that each calculation has been performed for all target products (Yes), the carbon dioxide emission calculation device 1000 next executes step S7.

[0076] In the above example, the calculations in the steps S1 to S5 are performed for each of the products with the product names "P001" to "P100", and the calculation results shown in Figs. 6 to 8 are obtained.

[0077] In process S7, when there are multiple target products that are classified as the same, the carbon dioxide emission calculation device 1000 calculates the sum of the separated inventory CO2 emissions calculated for each of the multiple target products by the aggregation calculation unit 17 of the control processing unit 1 as an aggregated separated inventory CO2 emission amount, stores this in the memory unit 5, and calculates the sum of the product CO2 emissions calculated for each of the multiple target products as an aggregated product CO2 emission amount, and stores this in the memory unit 5.

[0078] In the above example, each product with the product name "P001" to the product name "P100" is a multiple target product classified with the same type name "H1". The aggregated separated inventory CO2 emissions are calculated by summing up the separate inventory CO2 emissions of "52" [tCO2], "65" [tCO2], "37.8" [tCO2], ..., "25.2" [tCO2] for each product with the product name "P001" to the product name "P100". The aggregate product CO2 emissions can be calculated by summing up the CO2 emissions of each product, "130.3" [tCO2] (= 182.3 - 52), "144.2" [tCO2] (= 209.2 - 65), "87.4" [tCO2] (= 125.2 - 37.8), ..., "125.1" [tCO2] (= 150.3 - 25.2), for each product, from product name "P001" to product name "P100".

[0079] Next, the carbon dioxide emission calculation device 1000 causes the first unit quantity calculation unit 18 of the control processing unit 1 to calculate a first unit separated inventory CO2 emission amount, which is the CO2 emission amount per unit quantity for the separated inventory item, and stores it in the memory unit 5, and causes the second unit quantity calculation unit 19 of the control processing unit 1 to calculate a second unit separated inventory CO2 emission amount, which is the CO2 emission amount per unit quantity for the multiple separated inventory items, in the case where there are multiple separated inventory items that are classified as the same, during the specified period, and stores it in the memory unit 5 (S8).

[0080] In the above example, in Figure 9, in each record for each product with the product name "P001" to "P100", the CO2 emissions of each first unit of separated inventory are recorded in the rightmost column when viewed from the front, and the total column records the CO2 emissions of second unit of separated inventory for each of these products. For example, in the record for product name "P001," the first unit separated inventory CO2 emission amount of "6.5" [tCO2 / ton] (=52 / 8) is entered in the rightmost column when viewed from the front, calculated by dividing the separated inventory CO2 emission amount of "52" [tCO2] by the separated inventory quantity of "8" [tons], and the total column shows the second unit separated inventory CO2 emission amount of "6.2" [tCO2 / ton] (=3534 / 570), calculated by dividing the aggregate separated inventory CO2 emission amount of "3534" [tCO2] by the aggregate separated inventory quantity of "570" [tons], which is the sum (total) of the separated inventory quantities of each separated inventory item classified in the same way.

[0081] Next, in the carbon dioxide emission calculation device 1000, when there are multiple separated inventory items classified as the same during the specified period, the used separated inventory emission calculation unit 20 of the control processing unit 1 calculates the CO2 emission amount for the separated inventory items that are used as product materials among the multiple separated inventory items as the used separated inventory CO2 emission amount, and stores it in the memory unit 5 (S9).

[0082] In the above example, if the separated inventory items generated in the manufacture of the products named "P001" through "P003" are used as product materials, the sum (total) of the CO2 emissions of "52" [tCO2], "65" [tCO2], and "37.8" [tCO2] for the separated inventory items generated in the manufacture of the products named "P001" through "P003" is calculated as the CO2 emissions of the separated inventory used, which is 154.8 [tCO2] (= 52 + 65 + 37.8).

[0083] Next, in the case where there are multiple separated inventory items classified as the same during the specified period, the carbon dioxide emission calculation device 1000 calculates a disposal rate, which is the ratio of a second total amount of separated inventory items (second total amount of separated inventory items ultimately disposed of (scraped)) excluding separated inventory items used as product materials among the multiple separated inventory items, to a first total amount of the multiple separated inventory items, through the product emission recalculation unit 21 of the control processing unit 1, and recalculates the product CO2 emissions related to the target product (recalculated product CO2 emissions) by subtracting the multiplication result obtained by multiplying the determined separated inventory CO2 emissions by (1 - the disposal rate) from the determined total process CO2 emissions, and stores the recalculated product CO2 emissions in the memory unit 5 (S10).

[0084] In the above example, for example, as shown in FIG. 10, if the first total amount is "570" [tons] and the second total amount is "228" [tons], the scrap rate "40" [%] (= (288 / 570) × 100) is obtained by dividing the second total amount "228" [tons] by the first total amount "570" [tons]. In this example, in FIG. 11, the obtained CO2 emission rate of each product is again shown in each record of the products with the product names "P001" to "P100". For example, in the record for product name "P001," the recalculated product CO2 emissions of "151.1" [tCO2] (=182.3-31.2) are entered in the rightmost column when viewed from the front, which are calculated by multiplying the separated inventory CO2 emissions of "52" [tCO2] by (1-the above-mentioned disposal rate [0.4]) and subtracting the result "31.2" [tCO2] (=52 × (1-0.4)) from the total process CO2 emissions of "182.3" [tCO2].

[0085] In addition, in this process S10, when there are multiple separated inventory items classified as the same during the specified period, the product emission recalculation unit 21 may calculate a utilization rate, which is the ratio of a third total amount of the multiple separated inventory items that were used as product materials among the multiple separated inventory items to a first total amount of the multiple separated inventory items, and calculate the recalculated product CO2 emissions by subtracting a result of multiplying the calculated separated inventory item CO2 emissions by the utilization rate from the calculated total process CO2 emissions. In the above example, the utilization rate of "60" [%] (= (342 / 570) × 100) is obtained by dividing the third total amount "342" [tons] (= 570 - 228) by the first total amount "570" [tons], and for the product name "P001", the recalculated product CO2 emission amount of "151.1" [tCO2] (= 182.3 - 31.2) is obtained by subtracting the multiplication result "31.2" [tCO2] (= 52 × 0.6) obtained by multiplying the separated inventory CO2 emission amount "52" [tCO2] by the utilization rate [0.6] from the total process CO2 emission amount "182.3" [tCO2].

[0086] Then, the carbon dioxide emission calculation device 1000 outputs each calculation result, such as separated inventory raw material CO2 emission, separated inventory process CO2 emission, separated inventory CO2 emission, total process CO2 emission, initial product CO2 emission, aggregated separated inventory CO2 emission, aggregated product CO2 emission, first and second unit separated inventory CO2 emission, used separated inventory CO2 emission, first and second total amount, scrapping rate, and recalculated product CO2 emission, to the output unit 3 by the control unit 11 of the control processing unit 1 (S11), and ends this process. Note that the control unit 11 may output each calculation result to an external device via the IF unit 4 as necessary.

[0087] When separate inventory items are used as product materials and a specific process is included in multiple processes in which a product is manufactured using the separate inventory items as product materials, the carbon dioxide emission calculation device 1000 operates in the same manner as described above, determining and outputting each calculation result.

[0088] On the other hand, when the separated inventory is used as a product material and the multiple processes in which the product is manufactured using the separated inventory as a product material do not include a specific process, the carbon dioxide emission calculation device 1000 operates as follows when calculating the product CO2 emission.

[0089] Fig. 12 is a diagram for explaining product information in a case where a separated inventory item is used as a product material, as an example. Fig. 13 is a diagram for explaining a method for calculating product CO2 emissions in a case where a separated inventory item is used as a product material, as an example.

[0090] In this case, the carbon dioxide emission calculation device 1000, through the second product emission calculation unit 22 of the control processing unit 1, calculates the process CO2 emission amount related to each of multiple processes for manufacturing a product using separated inventory items as product materials, and calculates the sum of the raw material CO2 emission amount and each process CO2 emission amount calculated for each of the multiple processes for manufacturing the product as the product process CO2 emission amount.

[0091] For example, as shown in FIG. 12, in the case where a product with a product name "P101" is manufactured using "4" [tons] of scraps (an example of separated inventory) through each of the processes of the second process of the process name "heat treatment", the third process of the process name "surface treatment", and the fourth process of the process name "shipment", the second product emission calculation unit 22 calculates the process CO2 emissions of "4" [tCO2] (=1 [tCO2 / ton] × 4 [ton]), "2" [tCO2] (=0.5 [tCO2 / ton]) for each of the second to fourth processes, as shown in FIG. The raw material CO2 emission of "24.8" [tCO2] (=6.2 [tCO2 / ton] × 4 [tons]) and the CO2 emission of each process "4" [tCO2], "2" [tCO2], and "0.18" [tCO2] (=0.05 [tCO2 / ton] × 3.6 [tons]) are calculated, and the sum of "24.8" [tCO2] (=6.2 [tCO2 / ton] × 4 [tons]) and the CO2 emission of each process "4" [tCO2], "2" [tCO2], and "0.18" [tCO2] calculated for each of the multiple processes for manufacturing the product, "30.98" [tCO2] (=24.8 + 4 + 2 + 0.18) is calculated as the product process CO2 emission and stored in the memory unit 5. For example, the separated inventory used as the product material can be "4" [tons] out of "8" [tons] of the separated inventory generated in the manufacture of a product named "P001", or "4" [tons] of the separated inventory generated in the manufacture of a product named "P100".

[0092] In the above example, the number of specific processes included in the multiple processes for manufacturing the product is one, but it may be multiple. In this case, the first emission calculation unit 12 calculates the separated inventory raw material CO2 emissions at each of the multiple specific processes in the same manner as described above, the second emission calculation unit 13 calculates the separated inventory process CO2 emissions at each of the multiple specific processes in the same manner as described above, the separated inventory emission calculation unit 14 calculates the separated inventory CO2 emissions at each of the multiple specific processes in the same manner as described above, and the first product emission calculation unit 16 calculates the product CO2 emissions related to the target product by subtracting the separated inventory CO2 emissions calculated for each of the multiple specific processes from the calculated total process CO2 emissions.

[0093] FIG. 14 is a diagram for explaining a method of calculating CO2 emissions from separated inventory when there are multiple specific processes, as an example. For example, a product with the product name "P333" is manufactured through the following steps, as shown in FIG. 14: the first step with the process name "raw material", the second step with the process name "melting and casting", the third step with the process name "extrusion 2", the fourth step with the process name "cutting A", the fifth step with the process name "heat treatment", the sixth step with the process name "cutting B", the seventh step with the process name "heat treatment", the eighth step with the process name "surface treatment", and the ninth step with the process name "shipping". The fourth step with the process name "cutting A" and the sixth step with the process name "cutting B" are specific processes, and the separated products of the fourth and sixth steps are separated inventory products.

[0094] In this case, the separated inventory emission calculation unit 14 calculates the separated inventory CO2 emission of "25.2" [tCO2] (=16+6+2.4+0.8) for the fourth process of the specific process, which is the sum of the separated inventory raw material CO2 emission of "16" [tCO2] and the separated inventory process CO2 emissions of "6" [tCO2], "2.4" [tCO2], and "0.8" [tCO2] calculated for each of the processes from the second process to the fourth process of the specific process. For the sixth process of the specific process, the separated inventory raw material CO2 emissions of "24" [tCO2] is added to the separated inventory process CO2 emissions of "9" [tCO2], "3.6" [tCO2], "1.2" [tCO2], "6" [tCO2], and "0.9" [tCO2] obtained for each of the second process through the sixth process of the specific process, resulting in a separated inventory CO2 emission of "44.7" [tCO2] (=24 + 9 + 3.6 + 1.2 + 6 + 0.9).

[0095] The first product emission calculation unit 16 calculates the product CO2 emission amount "73" [tCO2] (=142.9-25.2-44.7) related to the target product by subtracting the separate inventory CO2 emission amounts "25.2" [tCO2] and "44.7" [tCO2] calculated for the fourth and sixth specific processes, respectively, from the total process CO2 emission amount "142.9" [tCO2] for the product with the product name "P333".

[0096] The first unit quantity calculation unit 18 calculates the first unit separated inventory CO2 emissions from the separated inventory in the fourth process as "6.3" [tCO2 / ton] (=25.2 / 4), and calculates the first unit separated inventory CO2 emissions from the separated inventory in the sixth process as "7.45" [tCO2 / ton] (=44.7 / 6).

[0097] As described above, the carbon dioxide emission calculation system (one example of a carbon dioxide emission calculation device) 1000 in the embodiment, and the carbon dioxide emission calculation method and carbon dioxide emission calculation program implemented therein calculate the separated inventory CO2 emission by the sum of the separated inventory raw material CO2 emission and each separated inventory process CO2 emission calculated for each process from the first process to the specific process, so that it is possible to calculate the CO2 emission even when separated inventory is generated. Since the separated inventory CO2 emission is calculated, when the separated inventory is used as a product material, the separated inventory CO2 emission can be used as the raw material CO2 emission, and even when the separated inventory is used as a product material, the raw material CO2 emission can be known in the same way as the original raw material.

[0098] The carbon dioxide emission calculation system (carbon dioxide emission calculation device) 1000, the carbon dioxide emission calculation method, and the carbon dioxide emission calculation program can calculate the product CO2 emission related to the target product by subtracting the separated inventory CO2 emission from the total process CO2 emission. Since the product CO2 emission is the CO2 emission related to the production of the product, it is usually calculated as the sum (total) of the raw material CO2 emission and the process CO2 emission related to each process, as explained with reference to Figs. 12 and 13. As described above, when the separated inventory is used as a product material, the separated inventory CO2 emission of this separated inventory is included in the product CO2 emission of the product manufactured using the separated inventory as a raw material, so if the product CO2 emission is calculated as described above in the usual manner, the separated inventory CO2 emission will be double-counted. The carbon dioxide emission calculation system (carbon dioxide emission calculation device) 1000, the carbon dioxide emission calculation method, and the carbon dioxide emission calculation program calculate the product CO2 emissions by subtracting the separated inventory CO2 emissions from the total process CO2 emissions, thereby avoiding double counting and allowing the product CO2 emissions of products manufactured through multiple processes including a specific process, as well as the product CO2 emissions of products manufactured using separated inventory as raw materials, to be properly calculated.

[0099] The carbon dioxide emission calculation system (carbon dioxide emission calculation device) 1000, the carbon dioxide emission calculation method, and the carbon dioxide emission calculation program can calculate the first unit separated inventory CO2 emission, which is the CO2 emission per unit amount of the separated inventory. When the separated inventory is managed individually, the first unit separated inventory CO2 emission can be used as the unit raw material CO2 emission, which is the CO2 emission per unit amount of the raw material, and the unit raw material CO2 emission can be found when the separated inventory is used as it is as a product material.

[0100] The carbon dioxide emission calculation system (carbon dioxide emission calculation device) 1000, the carbon dioxide emission calculation method, and the carbon dioxide emission calculation program can calculate the second unit separated inventory CO2 emission, which is the CO2 emission per unit amount for multiple separated inventory items classified in the same way. When multiple separated inventory items classified in the same way are managed collectively instead of being managed individually, the second unit separated inventory CO2 emission can be used as the unit raw material CO2 emission, and the unit raw material CO2 emission can be found when some of the multiple separated inventory items managed collectively are used as product materials.

[0101] The carbon dioxide emission calculation system (carbon dioxide emission calculation device) 1000, the carbon dioxide emission calculation method, and the carbon dioxide emission calculation program can calculate the CO2 emission amount (used separated inventory CO2 emission amount) of the separated inventory items classified in the same category that were used as product materials in a specified period. In other words, the total amount of CO2 emission amount of the separated inventory items classified in the same category that were used as product materials in a specified period is calculated as the used separated inventory CO2 emission amount.

[0102] The carbon dioxide emission calculation system (carbon dioxide emission calculation device) 1000, the carbon dioxide emission calculation method, and the carbon dioxide emission calculation program can allocate the separated inventory CO2 emissions of the separated inventory excluding the separated inventory used as the product material to the product CO2 emissions of the target product by re-calculating the product CO2 emissions related to the target product. The product CO2 emissions calculated as above do not include the total amount of separated inventory CO2 emissions by assuming that the entire amount of the separated inventory is used as the product material. Since products are usually manufactured according to actual orders or scheduled (forecast) orders, there may be cases where the entire amount of the separated inventory is not used as the product material during the specified period. The carbon dioxide emission calculation system (carbon dioxide emission calculation device) 1000, the carbon dioxide emission calculation method, and the carbon dioxide emission calculation program can allocate the separated inventory CO2 emissions of the separated inventory excluding the separated inventory used as the product material (separate inventory CO2 emissions of the discarded separated inventory) to the product CO2 emissions related to the target product, and can allocate the separated inventory CO2 emissions of the discarded separated inventory to the product CO2 emissions. Therefore, the total amount of CO2 emissions associated with a factory in a given period can be taken into account and allocated to product CO2 emissions.

[0103] In the above embodiment, the CO2 emissions are calculated based on the product manufacturing results of the products manufactured in a predetermined period, but the CO2 emissions may be calculated based on a product manufacturing plan that plans the manufacture of the products in a predetermined period. This allows the CO2 emissions to be predicted. In this case, the product information includes, for example, raw material information related to raw materials for manufacturing the products, manufacturing process information related to a plurality of processes for manufacturing the products, and product manufacturing plan information related to the products planned to be manufactured in a predetermined period. The scrap rate (or utilization rate) is predicted, for example, from past records, and the predicted value is used for the scrap rate (or utilization rate).

[0104] In order to express the present invention, the present invention has been described adequately and sufficiently through the embodiments with reference to the drawings in the above description, 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 departs from the scope of the claims described in the claims, the changes or improvements are interpreted as being included in the scope of the claims. [Explanation of symbols]

[0105] 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 1st emission calculation section 13 Second emission calculation section 14 Separated inventory discharge amount calculation section 15 Total process discharge calculation unit 16 1st product emissions calculation section 17 Aggregation and calculation section 18 First unit amount calculation unit 19 Second unit amount calculation unit 20 Utilization separation inventory discharge calculation section 21 Product emissions recalculation section 22 2nd product emissions calculation section 51 Product information storage section 52 Unit emission amount information storage section

Claims

1. CO2 emissions related to target products manufactured in a specified period at a factory capable of manufacturing multiple types of products that are manufactured through multiple processes from raw materials. ２ A carbon dioxide emission calculation system for calculating an emission amount, The plurality of steps includes a specific step in which a separated stock item is generated during processing, the separated stock item being separated from the main body and stocked; The raw material CO ２ Of the emissions, the separated inventory raw material CO ２ A first emission amount calculation unit that calculates an emission amount; Among the multiple processes for manufacturing the target product, for each process from the first process to the specific process, a process CO related to the process ２ The discharge amount of the process CO ２ Of the emissions, the separated inventory process CO ２ A second emission amount calculation unit that calculates an emission amount; The separated inventory raw material CO ２ The CO emissions and each separate inventory process CO calculated for each process from the first process to the specific process ２ The sum of emissions and inventory CO ２ A separate inventory discharge calculation unit is provided to calculate the discharge amount. Carbon dioxide emissions calculation system.

2. For each of a plurality of processes for manufacturing the target product, a process CO ２ The emission amount of the raw material CO ２ The CO emissions and each process CO calculated for each of the multiple processes for manufacturing the target product ２ The sum of the CO emissions and the total process CO ２ A total process discharge amount calculation unit for calculating a discharge amount; The total process CO ２ The separated inventory CO calculated from the emission amount ２ By subtracting the emissions, the product CO2 related to the target product is calculated. ２ and a first product discharge amount calculation unit for calculating a discharge amount. The carbon dioxide emission calculation system according to claim 1 .

3. CO per unit amount for the segregated inventory ２ Emissions of first unit separated inventory CO ２ A first unit amount calculation unit for calculating a discharge amount is further provided. The carbon dioxide emission calculation system according to claim 1 .

4. In the case where there are multiple separate inventory items classified in the same manner during the specified period, the CO per unit amount for the multiple separate inventory items ２ Emissions of second unit separated inventory CO ２ Further comprising a second unit amount calculation unit for calculating a discharge amount. The carbon dioxide emission calculation system according to claim 1 .

5. In the case where there are a plurality of separated stock items classified in the same manner during the specified period, the CO for the separated stock items used as product materials among the plurality of separated stock items is ２ Utilize emissions Separate inventory CO ２ A utilization separated inventory emission calculation unit is further provided to calculate the emission amount. The carbon dioxide emission calculation system according to claim 1 .

6. For each of a plurality of processes for manufacturing the target product, a process CO ２ The emission amount of the raw material CO ２ The CO emissions and each process CO calculated for each of the multiple processes for manufacturing the target product ２ The sum of the CO emissions and the total process CO ２ A total process discharge amount calculation unit for calculating a discharge amount; In the case where there are a plurality of separated inventory items classified in the same manner during the specified period, a scrapping rate is calculated which is a ratio of a second total amount of the separated inventory items excluding the separated inventory items used as product materials among the plurality of separated inventory items to a first total amount of the plurality of separated inventory items, or a utilization rate is calculated which is a ratio of a third total amount of the separated inventory items used as product materials among the plurality of separated inventory items to the first total amount of the plurality of separated inventory items, and the calculated total process CO ２ From the emissions, the separated inventory CO ２ The result of multiplying the emission amount by (1 - the scrapping rate) or the calculated separated inventory CO ２ The product CO2 emissions related to the target product are multiplied by the utilization rate and then subtracted from the product CO2 emissions. ２ and a product discharge amount recalculation unit for recalculating the discharge amount. The carbon dioxide emission calculation system according to claim 1 .

7. When a product is manufactured using the separated stock as a product material, the separated stock CO ２ The emission amount is the raw material CO ２ Emissions from the product CO2 ２ 3. The carbon dioxide emission calculation system according to claim 2, which calculates an emission amount, In the case where the specific step is not included in the multiple steps for manufacturing the product, for each of the multiple steps for manufacturing the product, a step CO related to the specific step is ２ The emission amount of the raw material CO ２ The CO emissions and each process CO calculated for each of the multiple processes for manufacturing the product ２ The sum of the emissions from the product process CO ２ A second product discharge amount calculation unit is further provided for calculating the discharge amount. Carbon dioxide emissions calculation system.

8. CO2 emissions related to target products manufactured in a specified period at a factory capable of manufacturing multiple types of products that are manufactured through multiple processes from raw materials. ２ A carbon dioxide emission calculation method for calculating an emission amount, comprising the steps of: The plurality of steps includes a specific step in which a separated stock item is generated during processing, the separated stock item being separated from the main body and stocked; The raw material CO ２ Of the emissions, the separated inventory raw material CO ２ a first discharge amount calculation step for calculating a discharge amount; Among the multiple processes for manufacturing the target product, for each process from the first process to the specific process, a process CO related to the process ２ The discharge amount of the process CO ２ Of the emissions, the separated inventory process CO ２ a second discharge amount calculation step for calculating a discharge amount; The separated inventory raw material CO ２ The CO emissions and each separate inventory process CO calculated for each process from the first process to the specific process ２ The sum of emissions and inventory CO ２ A separate inventory discharge calculation step for calculating the discharge amount; Carbon dioxide emissions calculation method.

9. CO2 emissions related to target products manufactured in a specified period at a factory capable of manufacturing multiple types of products that are manufactured through multiple processes from raw materials. ２ A carbon dioxide emission calculation program for determining an amount of emission, 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 7.

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