Carbon dioxide emission computing system, method therefor, and program therefor

Abstract

To provide a carbon dioxide emission computing system, a method therefor, and a program therefor with which it is possible to determine a reduction in CO2 emissions due to yield improvements.SOLUTION: A carbon dioxide emission computing system according to the present invention determines a reduction in a CO2 emission in a factory where a product manufactured through a plurality of processes is manufacturable in a plurality of types. The plurality of processes include a raw material for manufacturing the product assuming it as one of the processes. For each of the multiple types of products, a reduction in CO2 emissions due to yield improvements in each of the plurality of processes which is undergone when manufacturing the type of product is determined as a reduction in by-product by-process CO2 emission. The determined reduction in by-product by-process CO2 emission for each of the plurality of product types is aggregated for each process type to determine a reduction in by-process CO2 emission.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

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

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

[0004] Incidentally, when manufacturing products, companies strive to improve yields by, for example, reviewing equipment, manufacturing methods, etc. In this case, if the amount of CO2 emissions reduced by improving yields is known, it would be desirable, as it would provide an incentive to make efforts to improve yields, given the current interest in CO2 emissions.

[0005] The present invention has been made in consideration of the above circumstances, and its purpose is to provide a carbon dioxide emission calculation system, a carbon dioxide emission calculation method, and a carbon dioxide emission calculation program that can determine the amount of CO2 emissions reduced by improving yield. [Means for solving the problem]

[0006] After extensive investigation, the inventors have found that the above object can be achieved by the present invention described below. That is, a carbon dioxide emission calculation system according to one aspect of the present invention is a system for calculating a reduction in CO2 emissions in a factory capable of manufacturing a plurality of product types through a plurality of processes, the plurality of processes including raw materials for manufacturing the products as one of the processes, the system including: a first reduction amount calculation unit that calculates, for each of the plurality of product types, a reduction in CO2 emissions due to improvement in process yield in each of the plurality of processes that are performed in manufacturing the product of that product type; and a second reduction amount calculation unit that calculates a process-specific CO2 reduction amount by totaling, for each process type, the CO2 reduction amounts for each of the plurality of product types calculated by the first reduction amount calculation unit. Preferably, in the above-mentioned carbon dioxide emission calculation system, the process is carried out by equipment, processes carried out by equipment of different equipment types are different process types, the yield improvement of the process is the same as the yield improvement of the equipment, the CO2 reduction amount by product and process is the same as the CO2 reduction amount by product and equipment, and the CO2 reduction amount by process is the same as the CO2 reduction amount by equipment.

[0007] Such a carbon dioxide emission calculation system can calculate the amount of CO2 reduction for each product and process by improving the yield of the process, and can also calculate the amount of CO2 reduction for each process.

[0008] In another aspect, in the carbon dioxide emission calculation system described above, the first reduction amount calculation unit calculates the CO2 emission reduction amount for each product and process for each of the multiple processes that are carried out when manufacturing a product of the product type by calculating and totaling the reduction amount of CO2 emissions for each process upstream from the process in question due to yield improvements in the process.

[0009] A yield improvement in a certain process has an impact on each process upstream from that process. The carbon dioxide emission calculation system calculates and totals the amount of CO2 emissions reduction due to the yield improvement in that process for each process upstream from that process, so it can appropriately calculate the amount of CO2 reduction for each product and process in that process.

[0010] In another aspect, in the above-mentioned carbon dioxide emission calculation system, the first reduction amount calculation unit calculates, for each of a plurality of processes that are carried out when manufacturing products of the product type, the improvement amount for that process due to an improvement in the yield of that process as the improvement amount for that process, multiplies the CO2 emissions per unit amount for that process for each process upstream from the process in question by the calculated improvement amount for that process, and totals each of the first multiplication results to calculate the CO2 reduction amount for each product and process for that process.

[0011] If the CO2 emissions per unit amount of a process are common, they can be treated as a single amount without consideration, but typically they differ depending on the type of process. The carbon dioxide emission calculation system multiplies the CO2 emissions per unit amount of the process for each process upstream from the process in question by the calculated improvement amount for that process, and totals each of the first multiplication results, so it is possible to take into account the CO2 emissions per unit amount of each process, and to appropriately calculate the CO2 reduction amount for each product and process for that process, and therefore the CO2 reduction amount for each process.

[0012] In another aspect, in the above-mentioned carbon dioxide emission calculation system, the first reduction amount calculation unit calculates the difference amount for the process as the difference amount between the input amount input to the process and the amount passing through the process, and calculates the improvement amount for the process using the calculated difference amount for the process as an upper limit.

[0013] The improvement amount of a process will not exceed the difference between the input amount (input amount) and the passing amount (output amount).The carbon dioxide emission calculation system calculates the improvement amount of a process using the difference amount of the process as the upper limit, so it can appropriately calculate the CO2 reduction amount for each product and process of the process.

[0014] In another aspect, in the carbon dioxide emission calculation system described above, the raw materials include multiple materials with different CO2 emissions per unit amount, and each of the multiple materials is assigned a different priority order. When the process is a raw material considered to be one of the processes, the first reduction amount calculation unit, for each of the multiple materials, allocates the calculated improvement amount for the process according to the priority order, with the calculated improvement amount for the process as an upper limit for the material amount, to calculate an allocated amount for the material, multiplies the CO2 emission amount per unit amount for the material, and calculates the CO2 reduction amount for each product and process for the process by totaling each of the second multiplication results. Preferably, in the carbon dioxide emission calculation system described above, the raw materials include ingots and recyclable materials generated in the process that can be reused as the raw materials. Preferably, in the carbon dioxide emission calculation system described above, the raw materials include semi-finished products when a product is manufactured using multiple semi-finished products.

[0015] When using raw materials containing multiple materials with different CO2 emissions per unit amount, such a carbon dioxide emission calculation system can appropriately determine the amount of CO2 reduction by product and process for the process by reducing the materials in order of priority, and can determine the amount of CO2 reduction by process.

[0016] Another aspect of the carbon dioxide emission calculation method of the present invention is a method for calculating a reduction in CO2 emissions in a factory capable of manufacturing a plurality of product types through a plurality of processes, the plurality of processes including raw materials for manufacturing the products, the method comprising: a first reduction amount calculation step for calculating, for each of the plurality of product types, a reduction in CO2 emissions due to improvements in process yield in each of the plurality of processes that are performed when manufacturing products of that product type, as a product-by-process CO2 reduction amount; and a second reduction amount calculation step for calculating a process-by-process CO2 reduction amount by totaling, for each process type, the product-by-process CO2 reduction amounts for each of the plurality of product types calculated in the first reduction amount calculation step.

[0017] Such a carbon dioxide emission calculation method can calculate the amount of CO2 reduction for each product and process by improving the yield of the process, and can also calculate the amount of CO2 reduction for each process.

[0018] Another aspect of the present invention is a carbon dioxide emission calculation program that calculates the amount of CO2 emissions reduction in a factory that can manufacture multiple types of products that are manufactured through multiple processes, and is a program that causes a computer to function as any of the carbon dioxide emission calculation systems described above.

[0019] This makes it possible to provide a carbon dioxide emission calculation program, which has the same effects as the carbon dioxide emission calculation system described above. [Effects of the Invention]

[0020] The carbon dioxide emission amount calculation system, carbon dioxide emission amount calculation method, and carbon dioxide emission amount calculation program according to the present invention can determine the amount of CO2 emission reduction due to yield improvement. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a diagram showing a configuration of a carbon dioxide emission amount calculation system according to an embodiment. [Figure 2] FIG. 10 is a diagram showing a product information table as an example. [Figure 3] FIG. 10 is a diagram showing an example of a unit discharge amount information table. [Figure 4] As an example, this is a diagram for explaining how to determine CO2 emissions by product and process (by equipment) for product A. [Figure 5] As an example, this is a schematic diagram for explaining how to determine CO2 emissions by product and process (by equipment) for product A. [Figure 6] As an example, this is a diagram for explaining how to determine CO2 emissions by product and process (by equipment) for product B. [Figure 7] As an example, this is a diagram showing CO2 emissions by process (by equipment). [Figure 8] 4 is a flowchart showing the operation of the carbon dioxide emission calculation system. [Figure 9] FIG. 10 is a diagram illustrating a raw material containing a plurality of ingredients in a modified embodiment, as an example. [Figure 10] FIG. 10 is a diagram for explaining, as an example, how to determine CO2 emissions by product and process (by equipment) for product A in a modified embodiment. [Figure 11] FIG. 10 is a schematic diagram for explaining how to determine CO2 emissions by product and process (by equipment) for product A, as an example, in a modified embodiment. [Figure 12] FIG. 10 is a diagram showing CO2 emissions by process (by facility) as an example in a modified embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0022] Hereinafter, one or more embodiments of the present invention will be described with reference to the drawings. However, the scope of the invention is not limited to the disclosed embodiments. In addition, components with the same reference numerals in each drawing indicate the same components, and their description will be omitted as appropriate. In this specification, when referring to a general term, a reference numeral without a subscript is used, and when referring to an individual component, a reference numeral with a subscript is used.

[0023] A carbon dioxide emission calculation system in one embodiment is a system that calculates a reduction in CO2 emissions in a factory (plant) that can manufacture multiple product types through multiple processes. In this carbon dioxide emission calculation system, the multiple processes include raw materials for manufacturing the products, which are considered to be one of the processes. The carbon dioxide emission calculation system includes first and second reduction amount calculation units. The first reduction amount calculation unit calculates, for each of the multiple product types, a reduction in CO2 emissions due to improvements in process yield in each of the multiple processes that are performed when manufacturing the product of that product type, as a product-by-process CO2 reduction amount. The second reduction amount calculation unit calculates the process-by-process CO2 reduction amount by summing, for each process type, the product-by-process CO2 reduction amounts for each of the multiple product types calculated by the first reduction amount calculation unit.

[0024] Below, such a carbon dioxide emission calculation system, as well as a carbon dioxide emission calculation method and a carbon dioxide emission calculation program implemented therein, will be described in more detail. Here, as an example, a factory (plant) capable of producing a variety of rolled steel plates will be described, but the factory (plant) may be any type as long as it is capable of producing multiple types of products manufactured through multiple processes. The carbon dioxide emission calculation system may be configured by interconnecting an input / output terminal device that inputs and outputs data, one or more arithmetic processing devices (e.g., server devices) that perform various arithmetic processing, and one or more database devices that store (manage) various data, and at least some of these input / output terminal devices, one or more arithmetic processing devices, and one or more database devices may be integrated and interconnected for communication with the remainder. However, here, the carbon dioxide emission calculation system will be described using an example of an integrated carbon dioxide emission calculation device.

[0025] FIG. 1 is a diagram showing the configuration of a carbon dioxide emission calculation system (a carbon dioxide emission calculation device, as an example) in an embodiment. FIG. 2 is a diagram showing a product information table, as an example. FIG. 2A shows a product information table for product A, and FIG. 2B shows a product information table for product B. FIG. 3 is a diagram showing a unit emission amount information table, as an example. FIG. 4 is a diagram for explaining how to calculate CO2 emission amounts by product and process (by equipment) for product A, as an example. FIG. 5 is a schematic diagram for explaining how to calculate CO2 emission amounts by product and process (by equipment) for product A, as an example. FIG. 6 is a diagram for explaining how to calculate CO2 emission amounts by product and process (by equipment) for product B, as an example. FIG. 7 is a diagram showing CO2 emission amounts by process (by equipment), as an example.

[0026] The carbon dioxide emission calculation system (carbon dioxide emission calculation device as an example) 1000 in the embodiment includes, for example, an input unit 1, an output unit 2, an interface unit (IF unit) 3, a control processing unit 4, and a memory unit 5, as shown in FIG.

[0027] The input unit 1 is connected to the control processing unit 4 and is a device that inputs various commands, such as a command to start calculating the amount of CO2 emission reduction, and various data necessary for operating the carbon dioxide emission calculation device 1000, such as product information and unit emission information, to the carbon dioxide emission calculation device 1000, and is, for example, a plurality of input switches to which predetermined functions are assigned, a keyboard, a mouse, etc. The output unit 2 is connected to the control processing unit 4 and is a device that outputs the commands, data, calculation results, etc. input from the input unit 1 under the control of the control processing unit 4, and is, for example, a display device such as a CRT display, an LCD (liquid crystal display), or an organic EL display, or a printing device such as a printer.

[0028] The input unit 1 and the output unit 2 may be configured as a touch panel. In the case of configuring this touch panel, the input unit 1 is a position input device that detects an operation position and inputs, for example, a resistive film type or a capacitive type, and the output unit 2 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 are displayed on the display device. When a user touches the display position showing the input content they want to input, the position is detected by the position input device, and the display content displayed at the detected position is input to the carbon dioxide emission calculation device 1000 as the user's operation input content. With such a touch panel, the user can easily intuitively understand the input operation, and therefore a carbon dioxide emission calculation device 1000 that is easy for the user to use is provided.

[0029] The IF unit 3 is connected to the control processing unit 4 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 4, and is, for example, an interface circuit for RS-232C, which is a serial communication method, an interface circuit using the Bluetooth (registered trademark) standard, an interface circuit using the USB standard, etc. The IF unit 3 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.

[0030] The storage unit 5 is connected to the control processing unit 4 and is a circuit that stores various predetermined programs and various predetermined data under the control of the control processing unit 4.

[0031] The various predetermined programs include, for example, a control processing program, and the control processing program includes, for example, a control program, a first reduction amount calculation program, and a second reduction amount calculation program. The control program controls each of the units 1 to 3 and 5 of the carbon dioxide emission calculation device 1000 according to the function of each unit. The first reduction amount calculation program is a program that calculates, for each of the multiple product types, the amount of CO2 emissions reduced by improving the process yield in each of multiple processes that are used to manufacture products of that product type, as a CO2 reduction amount by product and process. The second reduction amount calculation program is a program that calculates the CO2 reduction amount by process by totaling, for each process type, the CO2 reduction amounts by product and process for each of the multiple product types calculated by the first reduction amount calculation program.

[0032] The various types of predetermined data include, for example, product information, unit discharge amount information, various intermediate calculation results, and final calculation results, which are necessary for executing each of these programs.

[0033] The 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 working memory for the control processing unit 4 and stores data generated during execution of the predetermined program, etc. The storage unit 5 may also be configured to include a hard disk device or a solid state drive (SSD) with a relatively large storage capacity.

[0034] 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 product information and unit discharge amount information, respectively.

[0035] The product information storage unit 51 stores product information. The product information is information about a product that is necessary for calculating the amount of CO2 emissions reduced by improving the process yield. More specifically, in this embodiment, the improvement in process yield is expressed as the improvement in the amount of material passing through the process. Therefore, the product information includes the multiple processes that are performed when manufacturing a product of a product type, as well as the input amount (input amount) input to the process and the output amount (output amount) passing through the process for each of the multiple processes. The input amount and the output amount are expressed, for example, by weight and volume (capacity). Although the raw materials used to manufacture a product are not processes, the multiple processes include the raw materials used to manufacture the product as one of the processes. Product information is stored in the product information storage unit 51 for each product type.

[0036] In this embodiment, this product information is stored in table format in the product information storage unit 51. As shown in FIG. 2, the product information table PT (PTa, PTb) registers this product information and includes a process number field 511 for registering a process number as an example of a process ID, which is an identifier for specifying and identifying a process; a facility name field 512 for registering the name of the facility that performs the process having the process number registered in the process number field 511; an input amount field 513 for registering the input amount [ton] to be input into the process having the process number registered in the process number field 511; and a passing amount field 514 for registering the passing amount [ton] that has passed through the process having the process number registered in the process number field 511. The product information table PT has a record for each of the multiple processes that are performed when manufacturing a product. As described above, in this embodiment, a raw material is considered to be one of the processes, and therefore the input amount and passing amount of the raw material are also registered in the product information table PT (raw material input amount = passing amount of raw material), and the process number of the raw material is set to "0" in this embodiment. A product information table is provided for each product type, and product information table PTa shown in FIG. 2A is a table for product type A, and product information table PTb shown in FIG. 2B is a table for product type B. In this embodiment, for simplicity of explanation, there are two product types, but any number may be used. The way in which products are classified may be set arbitrarily by the user of carbon dioxide emission calculation system 1000, and may be classified by product number, for example, or by lot even if the product number is the same.

[0037] The product information may be, for example, past actual values ​​for a predetermined period (e.g., a quarter or a year) to examine the actual situation, or may be expected values ​​for a predetermined period to simulate a forecast.

[0038] The unit emission amount information storage section 52 stores unit emission amount information. The unit emission amount information is the amount of CO2 emitted in the process by carrying out the process, and in this embodiment, it is expressed, for example, as unit CO2 emission, which is the amount of CO2 emitted per unit amount. In this embodiment, the unit amount is the weight of the material to be processed (material to be processed) to be processed by carrying out the process, but is not limited to this and may be, for example, the volume of the material to be processed.

[0039] In this embodiment, the unit emission information is stored in table format in the unit emission information storage unit 52. The unit emission information table UT, which registers this unit emission information, includes, for example, an equipment name field 521 for registering the name of the equipment that performs the process, and a unit CO2 emission field 522 for registering the unit CO2 emission amount [tCO2 / ton] of the process performed by the equipment with the equipment name registered in the equipment name field 521, as shown in FIG. 3, and has a record for each process name (equipment name). In this embodiment, as described above, since raw materials are considered to be one of the processes, the unit emission information table UT registers the unit CO2 emission amount of the raw material. The unit CO2 emission amount of the raw material is the amount of carbon dioxide emission per unit amount emitted in connection with the raw material, for example, the amount of CO2 emission per unit amount emitted in the production of the raw material.

[0040] The unit discharge amount information table UT may be configured to include a process name field in which a process name, which is the name of a process given to each process type, is registered instead of the equipment name field 521. However, since the product information table PT shown in FIG. 2 is configured to include an equipment name field 512, the unit discharge amount information table UT shown in FIG. 3 is configured to include an equipment name field 521 in accordance with this.

[0041] In this embodiment, the process is performed by equipment, and processes performed by equipment of different equipment types have different process types, and improving the yield of a process is the same as improving the yield of the equipment. The method for classifying the process types and the method for classifying the equipment types may be arbitrarily set by the user of the carbon dioxide emission calculation system 1000. For example, the process types may be classified according to the content of the process, such as a hot rolling process or a cold rolling process, or, for example, even if the content of the process is the same, they may be classified by the equipment that performs the process if the equipment (for example, if a hot rolling process is performed in equipment α and a hot rolling process is performed in equipment β, the hot rolling process performed in equipment α and the hot rolling process performed in equipment β may be classified as different types).

[0042] As described above, such product information and unit emission information may be input to carbon dioxide emission calculation system 1000 from input unit 1. Alternatively, for example, the product information and unit emission information may be input to carbon dioxide emission calculation system 1000 from a storage medium (e.g., a USB memory or an SD card (registered trademark)) that stores the information via IF unit 3, or may be input to carbon dioxide emission calculation system 1000 from a storage medium (e.g., a CD-R or a DVD-R) that records the information via its drive device and IF unit 3, or may be input to carbon dioxide emission calculation system 1000 from a management server device that manages the information via a communication network and IF unit 3. The control processing program and the like may also be input to carbon dioxide emission calculation system 1000 and stored in memory unit 5.

[0043] The control processing unit 4 is a circuit that controls each of the units 1 to 3, 5 of the carbon dioxide emission calculation device 1000 according to the function of each unit, and calculates the amount of CO2 emission reduction. The control processing unit 4 is configured to include, for example, a CPU (Central Processing Unit) and its peripheral circuits. When the control processing program is executed in the control processing unit 4, a control unit 41, a first reduction amount calculation unit 42, and a second reduction amount calculation unit 43 are functionally configured.

[0044] The control unit 41 controls each of the units 1 to 3 and 5 of the carbon dioxide emission calculation device 1000 according to the function of each unit, and is in charge of overall control of the carbon dioxide emission calculation device 1000.

[0045] The first reduction amount calculation unit 42 calculates, for each of the multiple product types, the amount of CO2 emissions reduced by improving the yield of each of the multiple processes involved in manufacturing the products of that product type as the product-by-process CO2 reduction amount. More specifically, for each of the multiple processes involved in manufacturing the products of that product type, the first reduction amount calculation unit 42 calculates the amount of CO2 emissions reduced by improving the yield of that process for each process upstream from that process, and totals these amounts to calculate the product-by-process CO2 reduction amount for that process. More specifically, for each of the multiple processes involved in manufacturing the products of that product type, the first reduction amount calculation unit 42 calculates the improvement amount of that process due to the yield improvement of that process as the improvement amount for that process, multiplies the CO2 emissions per unit amount of that process for each process upstream from that process by the calculated improvement amount for that process, and totals the results of the first multiplications to calculate the product-by-process CO2 reduction amount for that process. At this time, the first reduction amount calculation unit 42 calculates the difference between the input amount to the process and the passing amount that has passed through the process as the difference amount for the process, and calculates the improvement amount for the process using the calculated difference amount for the process as the upper limit.

[0046] The second reduction amount calculation unit 43 calculates the CO2 reduction amount by process by adding up the CO2 reduction amounts by product and process for each of the multiple product types calculated by the first reduction amount calculation unit 42 for each process type.

[0047] Then, the control unit 41 outputs the CO2 reduction amount by process calculated by the second reduction amount calculation unit 43 to the output unit 2. The control unit 41 may also output the CO2 reduction amount by product and process calculated by the first reduction amount calculation unit 42 to the output unit 2.

[0048] In this embodiment, as described above, the process is carried out by equipment, and processes carried out by different types of equipment are of different process types, so the CO2 reduction amount by product and process is the same as the CO2 reduction amount by product and equipment, and the CO2 reduction amount by process is the same as the CO2 reduction amount by equipment.

[0049] The methods for calculating the CO2 reduction amount by product and by process and the CO2 reduction amount by process will be described below using a specific example shown in FIGS.

[0050] The process yield is the ratio of the process throughput to the process input. Since the process improvement resulting from improving the process yield cannot exceed the difference between the input and throughput for that process, the first reduction calculation unit 42 first calculates the difference between the input and throughput for each of the multiple processes involved in manufacturing a product of that product type as the process differential. For example, in the product information table PTa shown in FIG. 2A, the process number, equipment name, input amount, and throughput are listed in the process number column, equipment name column, input amount column, and throughput amount column, respectively, from the left in FIG. 4, and the differential amounts for each process are listed in the fifth differential amount column from the left in FIG. 4. For example, the input amount, throughput, and differential amount for process number "1" are 440 tons, 420 tons, and 20 (=440-420) tons, respectively. The amount of CO2 passing through the final process, process number "4," is the production amount of product A, "300" [tons]. The sixth unit CO2 emission column from the left in Figure 4 lists the unit CO2 emissions for each of the equipment names "Raw Material X," "Equipment A," "Equipment B," "Equipment D," and "Equipment E" in the unit emission information table UT shown in Figure 3. For example, the record for the process number "0" lists the unit CO2 emission of "40" [tCO2 / ton] for the equipment name "Raw Material X" (i.e., raw material name "Raw Material X"), and the record for the process number "1" lists the unit CO2 emission of "3" [tCO2 / ton] for the equipment name "Equipment A."

[0051] Secondly, the first reduction amount calculation unit 42 calculates the improvement amount for each of the multiple processes involved in manufacturing products of the product type, by calculating the improvement amount for that process due to the yield improvement for that process. In this case, the first reduction amount calculation unit 42 calculates the improvement amount for that process with the difference amount for that process as the upper limit. The yield improvement value for that process is input to the carbon dioxide emission calculation system 1000 by, for example, the user via the input unit 1 in any notation, such as a ratio or the same weight as the input amount. In the examples shown in FIGS. 4 to 7, it is given as a ratio, and the yield improvement value for that process is 1 [%], which is common to all processes. The seventh difference improvement amount column from the left in FIG. 4 lists the improvement amount for each process. For example, the record for the process number "1" lists an improvement amount of "4.4" (= min (input amount "440" [tons] × yield improvement value "1" [%], difference amount "20" [tons])) [tons]. Alternatively, for example, the record for the process with process number "4" contains an improvement amount of "2" (=min(input amount "302" [tons] x yield improvement value "1" [%], difference amount "2" [tons])) [tons]. The operator min(x, y) is an operator that selects and outputs the smaller value of x and y.

[0052] Third, for each of the multiple processes involved in manufacturing a product of the product type, the first reduction calculation unit 42 multiplies the CO2 emissions per unit amount for each process upstream from the process by the calculated improvement for that process, and then totals the first multiplication results to calculate the CO2 reduction for each product and process (CO2 reduction for each product and equipment) for that process. The eighth retroactive amount column from the left (second from the right) in FIG. 4 lists the calculated improvement for each process upstream from the process. The retroactive amount column includes subcolumns for each process (equipment). For example, the improvement for process number "2" is "4.2" tons, and this improvement of "4.2" tons is listed in each record for each process upstream from process number "2," i.e., process number "2," process number "1," and process number "0." Alternatively, for example, the improvement amount for the process number "3" is "3.8" [tons], and this improvement amount "3.8" [tons] is entered in each record for each process upstream from the process number "3," i.e., process number "3," process number "2," process number "1," and process number "0." In this way, the improvement amount for a given process is reflected in each process upstream from the process number "3." For each process, the improvement amount is multiplied by the unit CO2 emissions for that process. The results of each first multiplication are entered in each record for each process in the "CO2 reduction amount by product and process" column, which is the ninth column from the left (first column from the right) in Figure 4. Note that the "CO2 reduction amount by product and process" column has sub-columns for each process (equipment), similar to the "retroactive amount" column. Furthermore, the total value for each process (equipment), i.e., the "CO2 reduction amount by product and process," is entered in the last row. For example, the improvement amount of "4.2" [tons] for process number "2" is multiplied by the unit CO2 emissions of each process of process number "2", process number "1" and process number "0" of "15" [tCO2 / ton], "3" [tCO2 / ton] and "40" [tCO2 / ton], respectively, and the first multiplication results of "63" (= 4.2 x 15) [tCO2], "12.6" (= 4.2 x 3) [tCO2] and "168" (= 4.2 x 40) [tCO2] are entered in each record of each process of process number "2", process number "1" and process number "0".The bottom line shows the total value of "243.6" (=63+12.6+168) [tCO2].

[0053] In Figure 5, the CO2 emissions from raw material X (process number "0"), equipment A (process number "1"), equipment B (process number "2"), equipment D (process number "3"), and equipment E (process number "4") are shown in a bar graph separated by the amount of CO2 emitted at each process. For example, the CO2 emissions from process number "1" performed by equipment A are 1320 [tCO2] (= input amount "440" x unit CO2 emission for this process "3" [tCO2 / ton]), of which the CO2 emissions from product A are 900 [tCO2] (= product amount "300" x unit CO2 emission for this process "3" [tCO2 / ton]), of which the CO2 emissions from process number "4" are 6 [tCO2] (= difference amount "2" x unit CO2 emission for this process "3" [tCO2 / ton]). ), of which the CO2 emissions for process number "3" are 234 [tCO2] (= difference amount "78" × unit CO2 emissions for this process "3" [tCO2 / ton]), the CO2 emissions for process number "2" are 120 [tCO2] (= difference amount "40" × unit CO2 emissions for this process "3" [tCO2 / ton]), and the CO2 emissions for process number "1" are 60 [tCO2] (= difference amount "20" × unit CO2 emissions for this process "3" [tCO2 / ton]). In Figure 5, the CO2 reduction amount for each product and process in facility D (process number "3") is shown by hatching as "228" [tCO2].

[0054] The first reduction amount calculation unit 41 then performs each of the first to third processes for each of the multiple product types. In the example shown in FIGS. 4 to 7, there are two product types, product A and product B. The first to third processes are also performed for product B, and the calculation results are shown in FIG. 6. The amount of material passing through the final process, process number "4," is the production amount of product B, "120" [tons]. Note that, in the above description, each of the first to third processes is performed for one product type, and then each of the first to third processes is performed for another product type. However, each of the first to third processes may be performed for each of the multiple product types. That is, the first process may be performed for each of the multiple product types, the second process may be performed for each of the multiple product types, and the third process may be performed for each of the multiple product types.

[0055] Fourth, the second reduction amount calculation unit 43 calculates the CO2 reduction amount by process by totaling, for each process type, the CO2 reduction amounts by product and process for each of the multiple product types calculated by the first reduction amount calculation unit 42. In the example shown in Figures 4 to 7, the calculated CO2 reduction amount by process is shown in Figure 7. For example, the CO2 reduction amount by process for the process performed by equipment A is 313.3 (=189.2 + 124.1) [tCO2], which is obtained by totaling (summing) the CO2 reduction amount by product and process for the process with process number "1" performed by equipment A for product A, which is 189.2 [tCO2], and the CO2 reduction amount by product and process for the process with process number "1" performed by equipment A for product B, which is 124.1 [tCO2]. Alternatively, for example, the CO2 reduction by process for a process carried out by equipment B is 375.6 (=243.6+132) [tCO2], obtained by summing (totaling) the CO2 reduction by product process of 243.6 [tCO2] for the process with process number 2 carried out by equipment B for product A and the CO2 reduction by product process of 132 [tCO2] for the process with process number 2 carried out by equipment B for product B. Alternatively, for example, the CO2 reduction by process for a process carried out by equipment C is 228 (=0+228) [tCO2], obtained by summing (totaling) the CO2 reduction by product process of 0 [tCO2] for the process with process number 3 carried out by equipment C for product A, since there is no process carried out by equipment C.

[0056] Then, the control unit 41 outputs the CO2 reduction amount for each process by process type to the output unit 2 in a table format as shown in FIG.

[0057] In the examples shown in Figures 4 to 7, by referring to the CO2 reduction amounts for each process by process type shown in Figure 7, the user can recognize that the effect of improving the yield of the process is great because the CO2 reduction amount for facility B (the process performed by facility B) is the greatest. In this way, the user can compare the effect of improving the yield of the process by process type (by equipment type), and can select the process type (equipment type) that should be improved with priority.

[0058] The input unit 1, output unit 2, IF unit 3, control processing unit 4, and storage unit 5 in the carbon dioxide emission calculation device 1000, which is an example of a carbon dioxide emission calculation system, can be configured by, for example, a desktop computer, a notebook computer, etc. Of course, as described above, the carbon dioxide emission calculation system may be configured by a plurality of computers connected to each other so that they can communicate with each other.

[0059] Next, the operation of this embodiment will be described below. Fig. 13 is a flowchart showing the operation of the carbon dioxide emission amount calculation system (one example of the carbon dioxide emission amount calculation device).

[0060] When the carbon dioxide emission calculation device 1000 having such a configuration is powered on, it initializes the necessary parts and starts operation. By executing the control processing program, the control processing unit 4 is functionally configured to include a control unit 41, a first reduction amount calculation unit 42, and a second reduction amount calculation unit 43.

[0061] 8, the carbon dioxide emission calculation device 1000 first calculates, for each of a plurality of processes that are passed through when manufacturing a product, the difference between the input amount and the passed amount in that process as the difference amount for that process by the first reduction amount calculation unit 42 of the control processing unit 4, and stores this in the storage unit 5 (S1). The calculation of each difference amount for each process may be performed for each of a plurality of product types in this process S1, or may be performed between processes S3 and S4 described below.

[0062] Next, the carbon dioxide emission calculation device 1000 calculates, by the first reduction amount calculation unit 42, for each of the multiple processes that are performed when manufacturing the product, the improvement amount due to the improvement in the process yield in that process as the improvement amount for that process, and stores this in the storage unit 5 (S2). The calculation of each improvement amount for each process may be performed for each of the multiple product types in this process S2, or may be performed between processes S3 and S4, which will be described later.

[0063] Next, the carbon dioxide emission calculation device 1000 calculates the CO2 reduction amount by product and process (CO2 reduction amount by product and equipment) for each of the multiple processes that are passed through when manufacturing the product using the first reduction amount calculation unit 42, and stores the calculated CO2 reduction amount in the memory unit 5 (S3). The calculation of the CO2 reduction amount by product and process for each of the multiple product types may be performed in step S3, or may be performed between steps S3 and S4, which will be described later.

[0064] Next, the carbon dioxide emission calculation device 1000 calculates the CO2 reduction amount by process (CO2 reduction amount by equipment) for each process type (equipment type) using the second reduction amount calculation unit 43 of the control processing unit 4, and stores it in the memory unit 5 (S4).

[0065] Then, the carbon dioxide emission calculation device 1000 causes the control unit 41 of the control processing unit 4 to output each calculation result from the output unit 2 (S5), and ends this process. Note that the control unit 41 may output each calculation result to an external device via the IF unit 3 as necessary.

[0066] 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, can determine the amount of CO2 reduction by product and process due to improvements in process yield, and can determine the amount of CO2 reduction by process.

[0067] The improvement in yield of a certain process has an impact on each process upstream from the certain process. 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 and total the amount of CO2 emission reduction due to the improvement in yield of each process upstream from the certain process, so that it is possible to appropriately calculate the amount of CO2 reduction by product and process for the process.

[0068] The amount of CO2 emissions per unit amount of a process can be treated as a single amount without consideration if it is common, but typically differs depending on the type of process. The carbon dioxide emission calculation system (carbon dioxide emission calculation device) 1000, carbon dioxide emission calculation method, and carbon dioxide emission calculation program multiply the CO2 emissions per unit amount of the process for each process upstream from the process in question by the amount of improvement for the process calculated above, and total the results of each of the first multiplications, so that the amount of CO2 emissions per unit amount for each process can be taken into consideration, and the amount of CO2 reduction for each product and process for the process can be appropriately calculated.

[0069] The improvement amount of a process will not exceed the difference between the input amount (input amount) and the passing amount (output amount). 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 improvement amount of the process using the difference amount of the process as an upper limit, so that it is possible to appropriately calculate the CO2 reduction amount for each product and process of the process.

[0070] In the above-described embodiment, a raw material considered to be one of the processes may include multiple materials with different CO2 emissions per unit amount (variation). In this case, the reduction in CO2 emissions due to an improvement in the yield of a process will be transmitted (retroactively) from the process to each upstream process, as described above. Therefore, in this variation, each of the multiple materials is assigned a different priority order. Then, for each of the multiple product types, if the process is a raw material considered to be one of the processes, the first reduction amount calculation unit 42 allocates the calculated improvement amount for the process to each of the multiple materials according to the priority order, with the calculated improvement amount being the upper limit of the material amount of the material, to obtain an allocated amount for the material, multiplies the CO2 emissions per unit amount of the material, and calculates the CO2 reduction amount for each product and process for the process by summing the results of the second multiplications. According to this, when using raw materials containing multiple materials with different CO2 emissions per unit amount, this modified form of carbon dioxide emission calculation system (carbon dioxide emission calculation device) 1000, carbon dioxide emission calculation method, and carbon dioxide emission calculation program can appropriately determine the amount of CO2 reduction by product and process for the process by reducing the materials in order of priority based on the user's intention, and can determine the amount of CO2 reduction by process.

[0071] The methods for determining the CO2 reduction amounts for each product and process and the CO2 reduction amounts for each process in this modified embodiment will be described below using a specific example shown in FIGS.

[0072] Fig. 9 is a diagram for explaining, as an example, a raw material containing multiple materials in a modified embodiment. Fig. 10 is a diagram for explaining, as an example, how to determine CO2 emissions by product and process (by equipment) for product A in a modified embodiment. Fig. 11 is a schematic diagram for explaining, as an example, how to determine CO2 emissions by product and process (by equipment) for product A in a modified embodiment. Fig. 12 is a diagram showing CO2 emissions by process (by equipment) in a modified embodiment.

[0073] In this example, raw material X, which is the raw material for product A in the above-described embodiment, is composed of metal X, which has a unit CO2 emission of 50 [tCO2 / ton], and scrap A, which has a unit CO2 emission of 0 [tCO2 / ton], in a composition ratio of 80:20 [%], as shown in FIG. 9. The priority of scrap A is "1", and the priority of metal X is "2", and scrap A is assigned an improvement amount prior to metal X. Scrap A is, for example, shavings, off-cuts, and non-standard products generated during the implementation of a process, and corresponds to an example of a recyclable material generated during the implementation of a process that can be reused as a raw material.

[0074] When the product type is product A, as shown in FIG. 10, the first reduction amount calculation unit 42 first calculates the difference amount for each process, as described above, and then, secondly, calculates the improvement amount for each process, as described above.

[0075] Third, the first reduction calculation unit 42 calculates the CO2 reduction amount for each of the multiple processes involved in manufacturing a product of the product type by multiplying the CO2 emissions per unit amount for each process upstream from the process by the calculated improvement amount for that process, and then summing the results of the first multiplications to calculate the CO2 reduction amount for each product and process (CO2 reduction amount for each product and facility) for that process. As described above, the improvement amount for a process is reflected in each process upstream from the process. If the process to which the improvement amount is reflected is a raw material considered to be a process, the calculated improvement amount for that process is allocated to each of the multiple materials according to the priority order, with the raw material amount of that material as the upper limit. The eighth retroactive amount column from the left (second from the right) in Figure 10 lists the calculated improvement amount for that process for each process upstream from the process. For example, the improvement amount for process number "2" is "4.2" [tons], and this improvement amount "4.2" [tons] is recorded in each record for each process upstream from process number "2," i.e., process number "2," process number "1," and process number "0." Here, for process number "0," the improvement amount "4.2" [tons] for the process is allocated to scrap A in order of priority. Alternatively, for example, the improvement amount for process number "3" is "3.8" [tons], and this improvement amount "3.8" [tons] is recorded in each record for each process upstream from process number "3," i.e., process number "3," process number "2," process number "1," and process number "0." Here, for process number "0," the improvement amount "3.8" [tons] for the process is allocated to scrap A in order of priority. For each process, the improvement amount is multiplied by the unit CO2 emissions for that process. The results of the first multiplications are entered in the respective records of the respective processes in the CO2 reduction amount by product and process column, which is the ninth from the left (first from the right) in Fig. 10. Here, in the process with process number "0", for each of the materials, metal X and scrap A, the allocated amount of the material is multiplied by the CO2 emissions per unit amount of the material, and the results of the second multiplications are entered in the respective records of the CO2 reduction amount by product and process column in Fig. 10. Furthermore, the total value for each process, i.e., the CO2 reduction amount by product and process, is entered in the last line.For example, the improvement amount "4.2" [tons] for process number "2" is multiplied by the unit CO2 emissions of "15" [tCO2 / ton], "3" [tCO2 / ton], and "0" [tCO2 / ton] for each process of process number "2," process number "1," and process number "0," respectively, and the first multiplication results "63" (= 4.2 × 15) [tCO2], "12.6" (= 4.2 × 3) [tCO2], and "0" (= 4.2 × 0) [tCO2] are entered in each record for each process of process number "2," process number "1," and process number "0." Here, the unit CO2 emissions of scrap A is "0" [tCO2 / ton], so as described above, the first multiplication result for process number "0" is "0" (= 4.2 × 0) [tCO2]. The bottom line shows the total value of "75.6" (=63+12.6+0) [tCO2].

[0076] In Figure 11, the CO2 emissions from raw material X (process number "0"), equipment A (process number "1"), equipment B (process number "2"), equipment D (process number "3"), and equipment E (process number "4") are shown in a bar graph separated by the CO2 emissions per process, similar to Figure 5. In this modified form of Figure 11, the improvement amount is allocated only to scrap A of raw material X, so the CO2 emissions from metal X in raw material X are "17,600" (=440 x 0.8 x 50) [tCO2].

[0077] The first reduction amount calculation unit 41 then performs the first to third processes for each of the multiple product types.

[0078] Fourth, the second reduction amount calculation unit 43 calculates the CO2 reduction amount by process by totaling, for each process type, the CO2 reduction amounts by product and process for each of the multiple product types calculated by the first reduction amount calculation unit 42. In the example shown in Figures 9 to 12, the calculated CO2 reduction amount by process is shown in Figure 12. For example, the CO2 reduction amount by process for the process performed by equipment A is 137.3 (=13.2 + 124.1) [tCO2], which is obtained by totaling (summing) the CO2 reduction amount by product and process for the process with process number "1" performed by equipment A for product A, which is 13.2 [tCO2], and the CO2 reduction amount by product and process for the process with process number "1" performed by equipment A for product B, which is 124.1 [tCO2] (see Figure 6).

[0079] Then, the control unit 41 outputs the CO2 reduction amount for each process by process type to the output unit 2 in a table format as shown in FIG.

[0080] In the example shown in Figures 9 to 12, by referring to the CO2 reduction amount for each process by process type shown in Figure 12, the user can recognize that the effect of improving the process yield is great because the CO2 reduction amount for equipment B (the process performed by equipment B) is the greatest.

[0081] 9 to 12, the raw materials include ingots and recyclable materials generated in the process that can be reused as the raw materials, but the raw materials may also include semi-finished products when a product is manufactured using multiple semi-finished products. In this case, for example, if a product is manufactured based on semi-finished product A and semi-finished product B, by treating the ingot X as semi-finished product A and scrap A as semi-finished product B, diagrams relating to semi-finished products A and B corresponding to FIGS. 9 to 12 can be created.

[0082] In order to express the present invention, the present invention has been properly and sufficiently described above through the embodiments with reference to the drawings, but it should be recognized that those skilled in the art can easily change and / or improve the above-mentioned embodiments. Therefore, unless the changes or improvements made by those skilled in the art are at a level that causes departure from the scope of the claims described in the claims, such changes or improvements are interpreted as being included in the scope of the claims. [Explanation of symbols]

[0083] 1000 Carbon dioxide emission calculation system (one example of a carbon dioxide emission calculation device) 1 Input section 2 Output section 3 Interface section (IF section) 4 Control processing section 5 Storage section 41 Control Unit 42 1st reduction amount calculation section 43 2nd reduction amount calculation section 51 Product information storage section 52 Unit emission amount information storage section

Claims

1. In a factory that can manufacture multiple types of products through multiple processes, ２ In a carbon dioxide emission calculation system for calculating the amount of emission reduction, The plurality of steps includes a raw material for producing the product as one of the steps; For each of the plurality of product types, CO reduction due to process yield improvement in each of a plurality of processes that are performed when manufacturing the product of the product type. ２ CO emissions reduction by product and process ２ a first reduction amount calculation unit that calculates the reduction amount; The CO reduction amount for each product and process for each of the plurality of product types calculated by the first reduction amount calculation unit ２ By summing up the reduction amount for each process type, CO ２ a second reduction amount calculation unit that calculates the reduction amount; Carbon dioxide emissions calculation system.

2. The first reduction amount calculation unit For each of the multiple processes that are involved in manufacturing the product of the product type, In the process, for each process upstream from the process, CO ２ By calculating and aggregating the reductions in emissions, CO by product and process of the process ２ Find the amount of reduction, The carbon dioxide emission calculation system according to claim 1 .

3. The first reduction amount calculation unit For each of the multiple processes that are involved in manufacturing the product of the product type, The improvement amount of the process in question due to the yield improvement of the process is calculated as the improvement amount of the process in question, and the CO per unit amount of the process for each process on the upstream side from the process in question is calculated. ２ Multiplying the discharge amount by the calculated improvement amount for the process and summing up the first multiplication results, CO by product and process of the process ２ Find the amount of reduction, The carbon dioxide emission calculation system according to claim 1 .

4. the first reduction amount calculation unit calculates a difference between an input amount input to the process and an amount passing through the process as a difference amount for the process, and calculates an improvement amount for the process using the calculated difference amount for the process as an upper limit. The carbon dioxide emission calculation system according to claim 3 .

5. The raw material is CO ２ It contains multiple materials with different emissions, A priority order different from each other is assigned to each of the plurality of materials, The first reduction amount calculation unit If the process is a raw material that is considered to be one of the processes, for each of the multiple materials, For the material, the amount of improvement in the process determined above is allocated according to the priority order with the material amount of the material as an upper limit, and the amount of CO per unit amount of the material is calculated. ２ Multiplying the emissions, The product-by-process CO2 of the process is calculated by summing up the results of the second multiplications. ２ Find the amount of reduction, The carbon dioxide emission calculation system according to claim 3 .

6. In a factory that can manufacture multiple types of products through multiple processes, ２ In a carbon dioxide emission calculation method for calculating an amount of reduction in emissions, The plurality of steps includes a raw material for producing the product as one of the steps; For each of the plurality of product types, CO reduction due to process yield improvement in each of a plurality of processes that are performed when manufacturing the product of the product type. ２ CO emissions reduction by product and process ２ a first reduction amount calculation step for calculating a reduction amount; The CO reduction amount for each product and process for each of the plurality of product types calculated in the first reduction amount calculation step ２ By summing up the reduction amount for each process type, CO ２ a second reduction amount calculation step of calculating a reduction amount, Carbon dioxide emissions calculation method.

7. In a factory that can manufacture multiple types of products that are manufactured through multiple processes, ２ A carbon dioxide emission calculation program for determining an amount of reduction in 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 5.

Images