Management device and management method

Abstract

To accurately calculate a CO2 emission amount emitted by producing a product.SOLUTION: A control apparatus is configured to: read out unit CO2 emission amount Qn, Qr of a raw material 41 which is a regular product and a raw material 42 which is a recycled product, and read out weight Mn, Mr used (S1, S2); calculate CO2 emission amounts Qntotal, Qrtotal of the raw materials 41, 42 by using them (S3); calculate the sum of the CO2 emission amounts Qntotal, Qrtotal to calculate a CO2 emission amount Qmtotal of the raw materials used to produce a product lot 46, and add a CO2 emission amount Qcal calculated on the basis of a power consumption amount Etotal to the above CO2 emission amount to calculate a CO2 emission amount Qtotal of the product lot 46 (S4-S7); and divide the CO2 emission amount Qtotal by the number of products 45 included in the product lot 46 to calculate a unit CO2 emission amount Qc of the product 45 (S8).SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present disclosure relates to a management device for managing the CO2 emissions discharged by the production of a product (hereinafter, also simply referred to as "CO2 emissions of the product"), and a management method.

Background Art

[0002] With the increasing awareness of environmental problems, there has been a growing interest in the CO2 emissions discharged by the production of products circulating in the market. Therefore, companies may calculate and manage the CO2 emissions discharged by the production of products. For example, Japanese Patent Application Laid-Open No. 2016-126372 discloses a method for calculating the CO2 emissions in the transportation process of products (including materials and parts).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The CO2 emissions discharged by the production of a certain product include the CO2 emissions discharged by the production of the raw materials used in the production of the product. As the CO2 emissions of the raw materials, the value reported from the supplier of the raw materials (the upstream company in the supply chain) is generally used.

[0005] Here, some of the raw materials used in the production of products may include recycled products. The CO2 emissions of recycled products are different from those of normal raw materials that are not recycled products (hereinafter also referred to as "normal products"). When some of the raw materials used in the production of products include recycled products, if the CO2 emissions of the raw materials are calculated using the CO2 emissions of the raw materials (normal products) reported by the supplier of the raw materials (normal products), it may not be possible to appropriately calculate the CO2 emissions of the products.

[0006] The present disclosure has been made to solve the above problems, and an object of the present disclosure is to accurately calculate the CO2 emissions discharged by the production of products.

Means for Solving the Problems

[0007] (1) The management device according to an aspect of the present disclosure is a management device that manages the CO2 emissions discharged by the production of products. The product is produced using a first raw material and a second raw material that are the same type of raw materials. The first raw material is not a recycled product produced by recycling. The second raw material is a recycled product. The management device includes a storage device that stores a first CO2 emission amount that is the CO2 emission amount per unit weight of the first raw material, and a second CO2 emission amount that is the CO2 emission amount per unit weight of the second raw material, and a control device that calculates the CO2 emission amount of the product based on the CO2 emission amount calculated from the first CO2 emission amount and the weight of the first raw material used in the production of the product, and the CO2 emission amount calculated from the second CO2 emission amount and the weight of the second raw material used in the production of the product.

[0008] According to the above configuration, the CO2 emission amount of the product is calculated in consideration of not only the CO2 emission amount of the first raw material that is not a recycled product but also the CO2 emission amount of the second raw material that is a recycled product. As a result, when a product is produced using the first raw material (normal product) and the second raw material (recycled product) that are the same type of raw materials as raw materials, the CO2 emission amount of the product can be appropriately calculated.

[0009] (2) In one embodiment, the second CO2 emission amount is calculated based on the amount of energy required to produce the second raw material by recycling.

[0010] According to the above configuration, the CO2 emission amount in the recycling process for producing the second raw material can be appropriately reflected in the second CO2 emission amount. Therefore, it becomes possible to accurately calculate the CO2 emission amount of the product.

[0011] (3) In one embodiment, when the recycling for producing the second raw material does not involve CO2 emission, the control device sets the second CO2 emission amount to zero.

[0012] According to the above configuration, when the recycling does not involve CO2 emission, the second CO2 emission amount can be set to zero. Thus, the utilization of recycling without CO2 emission can be promoted. Also, the CO2 emission amount in the recycling process for producing the second raw material can be appropriately reflected.

[0013] (4) The management method according to another aspect of the present disclosure is a management method for managing the CO2 emission amount emitted by the production of a product. The product is produced using a first raw material and a second raw material, which are the same type of raw materials. The first raw material is not a recycled product produced by recycling. The second raw material is a recycled product. The management method includes a step of reading out a first CO2 emission amount, which is the CO2 emission amount per unit weight of the first raw material, and a second CO2 emission amount, which is the CO2 emission amount per unit weight of the second raw material, and a step of calculating the CO2 emission amount of the product based on the CO2 emission amount calculated from the first CO2 emission amount and the weight of the first raw material used in the production of the product, and the CO2 emission amount calculated from the second CO2 emission amount and the weight of the second raw material used in the production of the product.

Effect of the Invention

[0014] According to the present disclosure, the CO2 emission amount emitted by the production of a product can be accurately calculated.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Embodiments for Carrying Out the Invention

[0016] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and their description will not be repeated.

[0017] FIG. 1 is an overall configuration diagram of the management system 1 according to the present embodiment. The management system 1 is a system for managing the CO2 emissions discharged by the production of products. The management system 1 includes a management device 2 belonging to Company A and a management device 3 belonging to Company B. Company A and Company B form a supply chain. Company A is an upstream company of Company B in the supply chain. Company A supplies a product 45, which is its own product, to Company B. In the present embodiment, the product 45 is an electronic component. Note that the product 45 is not limited to being an electronic component. The product 45 may be various raw materials. A raw material is an article used in the production process of a product. The product 45 may be, for example, parts such as an engine or a door of an automobile. Note that the product 45 corresponds to an example of the "product" according to the present disclosure.

[0018] The management device 2 of Company A manages the CO2 emissions (CO2 emissions of product 45) emitted by the production of product 45. The CO2 emissions of product 45 include the CO2 emissions of the raw materials (in the example described later in this embodiment, raw materials 41 and 42) used in the production of product 45, and the CO2 emissions required to produce product 45 using the above raw materials (in other words, the CO2 emissions emitted in the process of producing product 45 using the above raw materials).

[0019] In this embodiment, Company A produces product 45 using raw materials 41 and 42. In this embodiment, raw materials 41 and 42 are of the same type. Raw material 41 is a new product that is not a recycled product (hereinafter also referred to as a "normal product"), and raw material 42 is a recycled product. A recycled product means a recycled product and is a product produced by processing a molded product by a predetermined method. Note that raw material 41 corresponds to an example of the "first raw material" according to the present disclosure. Raw material 42 corresponds to an example of the "second raw material" according to the present disclosure.

[0020] In this embodiment, Company A purchases raw material 41 for producing product 45 from Company C (not shown), which is an upstream company in the supply chain. Company A receives, for example, a report on the CO2 emissions (CO2 emissions of raw material 41) emitted by the production of raw material 41 from the upstream company (Company C) along with the delivery of raw material 41 and stores this. Note that the CO2 emissions of raw material 41 may include the CO2 emissions emitted by the transportation of raw material 41 from Company C to Company A.

[0021] In addition, Company A purchases raw material 42 for manufacturing Product 45 from Company D (not shown), which is an upstream company in the supply chain. Company A receives, for example, a report on the amount of CO2 emissions (CO2 emissions of raw material 42) discharged during the production of raw material 42 from the upstream company (Company D) along with the delivery of raw material 42, and stores this information. Note that the CO2 emissions of raw material 42 may include the CO2 emissions discharged during the transportation of raw material 42 from Company D to Company A. There may also be cases where Company A produces raw material 42 through recycling. In this case, Company A calculates the amount of CO2 emissions required for producing raw material 42 through recycling, and stores this as the CO2 emissions of raw material 42. The amount of CO2 emissions required for producing raw material 42 through recycling is calculated, for example, based on the amount of energy required for producing raw material 42 through recycling.

[0022] The management device 2 includes a control device 21, a storage device 22, a communication device 23, an input device 24, and a display device 25. The control device 21, the storage device 22, the communication device 23, the input device 24, and the display device 25 are connected to a bus 26. In addition, a database 27 is communicably connected to the management device 2.

[0023] The control device 21 is constituted by, for example, an integrated circuit including a CPU (Central Processing Unit). The control device 21 executes various programs stored in the storage device 22. The various programs include an operating system and the like. The storage device 22 includes, for example, a ROM (Read Only Memory) that stores the various programs, and a RAM (Random Access Memory) that functions as a working memory and temporarily stores various data necessary for the execution of the various programs.

[0024] In addition to various programs, the memory device 22 further stores a conversion formula (conversion information) for converting the power consumption into the amount of CO2 emissions. The conversion formula may be, for example, multiplying the power consumption by a CO2 emission coefficient. The CO2 emission coefficient is provided, for example, by a power utility company (electric power company). The conversion formula stored in the memory device 22 is updated by the control device 21, for example, as the CO2 emission coefficient is updated.

[0025] The communication device 23 is configured to be communicable with the management device 3. The communication between the communication device 23 and the management device 3 is performed, for example, via the Internet or the like. Further, the communication device 23 is configured to be communicable with the management devices (not shown in either case) of the upstream companies (in the above example, Company C and Company D) in the supply chain. The communication between the communication device 23 and the management device of the upstream company is performed, for example, via the Internet or the like.

[0026] The input device 24 includes an input device. The input device is, for example, a mouse, a keyboard, a touch panel, and / or any other device capable of receiving a user's operation.

[0027] The display device 25 includes a display. The display device 25 causes the display to display various images according to a control signal from the control device 21. The display is, for example, a liquid crystal display, an organic EL (Electro Luminescence) display, or any other display device.

[0028] The database 27 stores information according to a control signal from the management device 2 (control device 21). The database 27 can also be provided as a memory device within the management device 2.

[0029] The control device 21 stores in the database 27 the CO2 emissions of the raw material 41 received from the upstream company (Company C) in the supply chain. The CO2 emissions of the raw material 41 are the CO2 emissions required to produce the raw material 41 (the CO2 emissions emitted during the production of the raw material 41). The CO2 emissions of the raw material 41 may also include the CO2 emissions of the raw materials used to produce the raw material 41. The CO2 emissions of the raw material 41 received from the upstream company may be the CO2 emissions per delivery unit of the raw material 41, the CO2 emissions per unit quantity of the raw material 41, or the CO2 emissions per unit weight of the raw material 41. In the present embodiment, as described above, it is assumed that the raw material 41 is a raw material. Therefore, in the present embodiment, it is assumed that the CO2 emissions of the raw material 41 received from the upstream company are the unit CO2 emissions Qn, which are the CO2 emissions per unit weight of the raw material 41. Note that when the control device 21 receives the CO2 emissions per delivery unit of the raw material 41, it may calculate the unit CO2 emissions Qn by dividing the CO2 emissions per delivery unit by the weight of the delivery unit. Then, the control device 21 stores the unit CO2 emissions Qn in the database 27.

[0030] In addition, the control device 21 stores in the database 27 the CO2 emissions of the raw material 42 received from the upstream company (Company D) in the supply chain. The CO2 emissions of the raw material 42 are the CO2 emissions required to produce the raw material 42 by recycling. The CO2 emissions of the raw material 42 can be calculated based on, for example, the amount of energy required for recycling. For example, in a case where there is no CO2 emission in the recycling process, such as when the molded product can be used as the raw material 42 as it is, the CO2 emissions of the raw material 42 can be set to zero. The CO2 emissions of the raw material 42 received from the upstream company may be the CO2 emissions per delivery unit of the raw material 42, the CO2 emissions per unit number of the raw material 42, or the CO2 emissions per unit weight of the raw material 42. In the present embodiment, as described above, it is assumed that the raw material 42 is a raw material. Therefore, in the present embodiment, it is assumed that the CO2 emissions of the raw material 42 received from the upstream company are the unit CO2 emissions Qr, which are the CO2 emissions per unit weight of the raw material 42. In addition, when the control device 21 receives the CO2 emissions per delivery unit of the raw material 42, it may calculate the unit CO2 emissions Qr by dividing the CO2 emissions per delivery unit by the weight of the delivery unit. Then, the control device 21 stores the unit CO2 emissions Qr in the database 27. When recycling is performed in Company A, the control device 21 calculates the unit CO2 emissions Qr based on the amount of energy consumed in the recycling process, and stores the calculated unit CO2 emissions Qr in the database 27. It is also possible to provide the function of calculating the unit CO2 emissions Qr to other devices of Company A. In this case, the control device 21 may acquire the unit CO2 emissions Qr from the above other device via the communication device 23, or may acquire the unit CO2 emissions Qr input by an employee of Company A from the input device 24.

[0031] The control device 21 calculates the CO2 emission per unit quantity Qc of the product 45 using the unit CO2 emission Qn and the unit CO2 emission Qr. The calculation method of the unit CO2 emission Qc will be described in detail later. The control device 21 reports the unit CO2 emission Qc to the management device 3 of Company B via the communication device 23.

[0032] Figure 2 is a functional block diagram of the control device 21. The control device 21 includes an information registration unit 210, an information reading unit 211, a first calculation unit 212, a second calculation unit 213, a conversion unit 214, a third calculation unit 215, and a fourth calculation unit 216. The control device 21 functions as the information registration unit 210, the information reading unit 211, the first calculation unit 212, the second calculation unit 213, the conversion unit 214, the third calculation unit 215, and the fourth calculation unit 216, for example, by executing a program stored in the storage device 22. Note that the information registration unit 210, the information reading unit 211, the first calculation unit 212, the second calculation unit 213, the conversion unit 214, the third calculation unit 215, and the fourth calculation unit 216 may be realized by dedicated hardware (electric circuit), for example.

[0033] The information registration unit 210 stores various information in the database 27. The information registration unit 210 stores, for example, the unit CO2 emission Qn of the raw material 41 obtained from the upstream company in the database 27 via the communication device 23. Also, the information registration unit 210 stores, for example, the unit CO2 emission Qr of the raw material 42 obtained from the upstream company in the database 27 via the communication device 23. In addition, in the case where recycling is performed in Company A, the information registration unit 210 acquires the CO2 emission Qr input by the employees of Company A from the input device 24 and stores the unit CO2 emission Qr in the database 27. Note that in the case where no CO2 emission occurs in the recycling process, such as when the molded product can be used as the raw material 42 as it is, the CO2 emission Qr is set to zero.

[0034] Also, when manufacturing the product 45, the information registration unit 210 acquires the weight Mn of the raw material 41 used and the weight Mr of the raw material 42 used, and stores the weights Mn and Mr in the database 27. The weight Mn of the raw material 41 and the weight Mr of the raw material 42 used in manufacturing the product 45 are input into the input device 24 by, for example, an employee of Company A. The information registration unit 210 acquires the weights Mn and Mr from the input device 24. Alternatively, the weight Mn of the raw material 41 and the weight Mr of the raw material 42 used in manufacturing the product 45 may be acquired from another device of Company A via the communication device 23. In the present embodiment, the product 45 is manufactured in predetermined lot units each including a predetermined number of products 45. Therefore, the weight Mn of the raw material 41 and the weight Mr of the raw material 42 are the weights of the raw material 41 and the raw material 42 used in manufacturing a predetermined lot (hereinafter also referred to as "product lot 46") including a predetermined number of products 45.

[0035] In addition, the information registration unit 210 acquires the amount of power consumed (total power consumption Etotal) on the production line (not shown) for manufacturing the product lot 46. The total power consumption Etotal may be measured by a power meter (not shown) provided on the production line, or may be measured by the management device 2. The total power consumption Etotal may be, for example, the power consumed in the factory building where the production line is laid. The power consumed in the factory building may include, for example, the power for operating all devices related to the production of the product, such as air conditioning, lighting, component transfer vehicles (forklifts, etc.), conveyors on the production line, impact wrenches, and assembling devices. For example, when a plurality of production lines are laid in the factory building, the power consumed on the production line may include the power for operating the devices related to the production of the product produced on the production line, and may not include the power for operating the devices related to the production of the products produced on other production lines. The information registration unit 210 stores the total power consumption Etotal in the database 27.

[0036] The information reading unit 211 reads various information from the database 27. The information reading unit 211 reads the unit CO2 emission Qn of the raw material 41 and the unit CO2 emission Qr of the raw material 42 from the database 27. The information reading unit 211 outputs the unit CO2 emissions Qn, Qr to the first calculation unit 212.

[0037] Also, the information reading unit 211 reads the weight Mn of the raw material 41 and the weight Mr of the raw material 42 used in the production of the product lot 46 from the database 27. The information reading unit 211 outputs the weights Mn, Mr to the first calculation unit 212.

[0038] Furthermore, the information reading unit 211 reads the total power consumption Etotal from the database 27. The information reading unit 211 outputs the total power consumption Etotal to the conversion unit 214.

[0039] The first calculation unit 212 calculates the CO2 emission Qntotal of the raw material 41 used in the production of the product lot 46 from the unit CO2 emission Qn of the raw material 41 and the weight Mn. Specifically, the first calculation unit 212 calculates the CO2 emission Qntotal according to the following formula (1). Also, the first calculation unit 212 calculates the CO2 emission Qrtotal of the raw material 42 used in the production of the product lot 46 from the unit CO2 emission Qr of the raw material 42 and the weight Mr. Specifically, the first calculation unit 212 calculates the CO2 emission Qrtotal according to the following formula (2).

[0040] Qntotal = Qn × Mn ··· (1) Qrtotal = Qr × Mr ··· (2) The first calculation unit 212 outputs the calculated CO2 emissions Qntotal, Qrtotal to the second calculation unit 213.

[0041] The second calculation unit 213 adds the CO2 emission amount Qntotal and the CO2 emission amount Qrtotal to calculate the total CO2 emission amount Qmtotal, which is the sum of the CO2 emissions of the raw materials (raw material 41 and raw material 42) used in the production of the product lot 46. Specifically, the second calculation unit 213 calculates the CO2 emission amount Qmtotal according to the following formula (3).

[0042] Qmtotal = Qntotal + Qrtotal ··· (3) The second calculation unit 213 outputs the calculated CO2 emission amount Qmtotal to the third calculation unit 215.

[0043] The conversion unit 214 reads the conversion formula from the storage device 22. The conversion unit 214 inputs the total power consumption Etotal into the conversion formula to calculate the CO2 emission amount Qcal discharged in the production line during the production of the product lot 46. The conversion unit 214 outputs the CO2 emission amount Qcal to the third calculation unit 215.

[0044] The third calculation unit 215 adds the CO2 emission amount Qmtotal and the CO2 emission amount Qcal to calculate the total CO2 emission amount (CO2 emission amount of the product lot 46) Qtotal emitted during the production of the product lot 46. Specifically, the third calculation unit 215 calculates the CO2 emission amount Qtotal according to the following formula (4).

[0045] Qtotal = Qmtotal + Qcal ··· (4) The third calculation unit 215 outputs the calculated CO2 emission amount Qtotal to the fourth calculation unit 216.

[0046] The fourth calculation unit 216 divides the CO2 emission amount Qtotal by a predetermined number N, which is the number of products 45 included in the product lot 46, to calculate the unit CO2 emission amount Qc per unit number of the product 45. Specifically, the fourth calculation unit 216 calculates the unit CO2 emission amount Qc according to the following formula (5). Note that the predetermined number N can be stored in the database 27 in advance.

[0047] Qc = Qtotal / N ···(5) The fourth calculation unit 216 stores the calculated unit CO2 emission amount Qc in the database 27. Each of the products 45 is assigned an identification number. The fourth calculation unit 216 stores the unit CO2 emission amount Qc in the database 27 in association with the identification number of each of the products 45.

[0048] The unit CO2 emission amount Qc stored in the database 27 is transmitted to the management device 3 of Company B, for example, in response to a request from Company B or when delivering the product 45 to Company B. As a result, the CO2 emission amount of the product 45 is reported to Company B. When the product 45 is delivered to Company B, the control device 21 reads out the CO2 emission amount Qc of the product 45 from the database 27 using the identification number of the product 45 delivered to the company as a key. Then, the control device 21 outputs a control signal for transmitting the unit CO2 emission amount Qc of the product 45 to the management device 3 of Company B together with the information for identifying the product 45 delivered to Company B to the communication device 23. As a result, the information for identifying the product 45 delivered to Company B and the information on the unit CO2 emission amount Qc of the product 45 are reported to Company B via the communication device 23. Note that the information for identifying the product 45 delivered to Company B may be any information that allows Company B to identify which product the reported unit CO2 emission amount Qc belongs to. For example, it may be the above-mentioned identification number or the delivery number described in the delivery note or the like.

[0049] Figure 3 is a flowchart showing the procedure of the process for calculating the unit CO2 emission amount Qc of the product 45 executed by the control device 21. This flowchart is executed by the control device 21 when the production of the product lot 46 is completed. Each step (hereinafter, steps are abbreviated as "S") in the flowchart shown in Figure 3 will be described for the case where it is realized by software processing by the control device 21, but a part or all of it may be realized by hardware (electric circuit) fabricated in the control device 21.

[0050] In S1, the control device 21 reads out from the database 27 the unit CO2 emission amount Qn of the raw material 41 (ordinary product) used for the production of the product lot 46 and the unit CO2 emission amount Qr of the raw material 42 (recycled product) used for the production of the product lot 46.

[0051] In S2, the control device 21 reads out the weight Mn of the raw material 41 (ordinary product) used for the production of the product lot 46 and the weight Mr of the raw material 42 (recycled product) used for the production of the product lot 46.

[0052] In S3, the control device 21 calculates the CO2 emission amount Qntotal of the raw material 41 used for the production of the product lot 46 and the CO2 emission amount Qrtotal of the raw material 42 used for the production of the product lot 46 according to the above formulas (1) and (2), respectively.

[0053] In S4, the control device 21 calculates the CO2 emission amount Qmtotal, which is the sum of the CO2 emission amounts of the raw materials (raw material 41 and raw material 42) used for the production of the product lot 46, according to the above formula (3).

[0054] In S5, the control device 21 reads out the total power consumption Etotal from the database 27. Note that at the timing of S5, the control device 21 may be configured to acquire the total power consumption Etotal from a power measuring device provided on the production line.

[0055] In S6, the control device 21 reads out the conversion formula from the storage device 22. The control device 21 inputs the total power consumption Etotal into the conversion formula and calculates the CO2 emission amount Qcal discharged on the production line in the production of the product lot 46.

[0056] In S7, the control device 21 calculates the CO2 emission amount Qtotal of the product lot 46 according to the above formula (4).

[0057] In S8, the control device 21 reads out a predetermined number N, which is the number of products 45 included in the product lot 46, from the database 27. Then, the control device 21 calculates the unit CO2 emission amount Qc of the product 45 according to the above formula (5).

[0058] In S9, the control device 21 stores the unit CO2 emission amount Qc in the database 27 in association with each identification number of the product 45.

[0059] As described above, the management device 2 according to the present embodiment uses, for calculating the CO2 emission amount Qc of the product 45 produced using the raw material 41 which is a normal product and the raw material 42 which is a recycled product as raw materials, the CO2 emission amount Qntotal of the raw material 41 calculated from the unit CO2 emission amount Qn per unit weight of the raw material 41 and the weight Mn of the used raw material 41, and the CO2 emission amount Qrtotal of the raw material 42 calculated from the unit CO2 emission amount Qr per unit weight of the raw material 42 and the weight Mr of the used raw material 42. The management device 2 adds the CO2 emission amount Qntotal and the CO2 emission amount Qrtotal to calculate the CO2 emission amount Qmtotal of the raw materials (raw material 41 and raw material 42) used for the production of the product lot 46, adds the CO2 emission amount Qcal calculated based on the total power consumption Etotal thereto, and calculates the CO2 emission amount Qtotal of the product lot 46. The management device 2 calculates the unit CO2 emission amount Qc of the product 45 by dividing the CO2 emission amount Qtotal by the number of products 45 included in the product lot 46. In this way, the management device 2 calculates the unit CO2 emission amount Qc of the product 45 taking into account the CO2 emission amount Qrtotal of the raw material 42 which is a recycled product. Thereby, when the product 45 is produced using the normal product and the recycled product which are the same kind of raw materials as raw materials, the unit CO2 emission amount Qc of the product 45 can be appropriately calculated.

[0060] Then, when the unit CO2 emission amount Qc of the product 45 calculated as described above is reported to Company B, Company B can obtain the unit CO2 emission amount Qc of the product 45 taking into account the CO2 emission amount Qrtotal of the recycled product.

[0061] Further, the unit CO₂ emission amount Qr per unit weight of the raw material 42 which is a recycled product is determined based on the CO₂ emission amount required to produce the raw material 42 by recycling. By using the unit CO₂ emission amount Qr as the unit CO₂ emission amount Qc of the product 45, the CO₂ emission amount in the recycling process can be appropriately reflected in the unit CO₂ emission amount Qc. Therefore, the unit CO₂ emission amount Qc can be appropriately calculated.

[0062] Furthermore, in a case where no CO₂ is emitted during recycling, such as when the molded article can be used as the raw material 42 as it is, the unit CO₂ emission amount Qr of the raw material 42 is set to zero. This can promote the recycling of molded articles that do not emit CO₂ during recycling. Also, the CO₂ emission amount in the recycling process can be appropriately reflected in the unit CO₂ emission amount Qc of the product 45. Therefore, the unit CO₂ emission amount Qc of the product 45 can be appropriately calculated.

[0063] [Modification Example 1] In the embodiment, an example in which the unit CO₂ emission amount Qc of the product 45 is reported from Company A to Company B has been described. However, the CO₂ emission amount Qb per delivery unit of the product 45 may be reported from Company A to Company B.

[0064] Referring to FIG. 1 again, the product 45 is packed in a packing box 51 and delivered to Company B. A plurality of products 45 packed in the packing box 51 form a delivery unit. The control device 21 of the management device 2 reads out the unit CO₂ emission amount Qc from the database 27 and calculates the CO₂ emission amount Qb of the delivery unit. For example, even when a plurality of products 45 with different product lots are packed in the packing box 51, the control device can calculate the CO₂ emission amount Qb of the delivery unit by using the CO₂ emission amount Qc of each product.

[0065] [Modification Example 2] It is also conceivable to form a consortium among the enterprises included in the supply chain and share information among the enterprises using distributed ledger technology. In this case, the management devices 2 and 3 may function as nodes to form a distributed ledger network with the nodes of other enterprises included in the supply chain. For example, the management device 2 (node) transmits transaction data including information on the unit CO2 emission amount Qc of the product 45, which is the reporting target for the downstream enterprise B, to the distributed ledger network. By the management device 3 (node) of the enterprise B approving this transaction data, the unit CO2 emission amount Qc of the product 45 is reported to the downstream enterprise. By reporting the CO2 emission amount using distributed ledger technology, the tamper resistance of the information can be enhanced.

[0066] The embodiments disclosed this time should be considered illustrative in all respects and not restrictive. The scope of the present disclosure is indicated by the claims rather than the above description, and it is intended that all modifications within the meaning and scope equivalent to the claims be included.

Explanation of Signs

[0067] 1 Management system, 2 Management device, 3 Management device, 21 Control device, 22 Storage device, 23 Communication device, 24 Input device, 25 Display device, 26 Bus, 27 Database, 41, 42 Raw materials, 45 Product, 46 Product lot, 51 Packing box, 210 Information registration section, 211 Information reading section, 212 First calculation section, 213 Second calculation section, 214 Conversion section, 215 Third calculation section, 216 Fourth calculation section.

Claims

1. A management device for managing the CO₂ emissions discharged by the production of a product, The product is produced in a predetermined lot unit including a predetermined number of the products using a first raw material and a second raw material which are the same kind of raw materials in a production line for producing the product, The first raw material is not a recycled product produced by recycling, The second raw material is the recycled product, A storage device for storing a first CO₂ emission amount which is the CO₂ emission amount per unit weight of the first raw material and a second CO₂ emission amount which is the CO₂ emission amount per unit weight of the second raw material; And a control device for calculating the CO₂ emission amount of the product, The second CO₂ emission amount is calculated based on the amount of energy required to produce the second raw material by recycling, The control device, Calculates a third CO₂ emission amount which is the CO₂ emission amount of the first raw material used in the production of the predetermined lot from the first CO₂ emission amount and the weight of the first raw material used in the production of the predetermined lot, Calculates a fourth CO₂ emission amount which is the CO₂ emission amount of the second raw material used in the production of the predetermined lot from the second CO₂ emission amount and the weight of the second raw material used in the production of the predetermined lot, Adds the third CO₂ emission amount and the fourth CO₂ emission amount to calculate a fifth CO₂ emission amount which is the total of the CO₂ emission amounts of the first raw material and the second raw material used in the production of the predetermined lot, Calculates a sixth CO₂ emission amount which is the CO₂ emission amount discharged in the production of the predetermined lot in the production line based on the amount of electric power consumed in the production of the predetermined lot, Adds the fifth CO₂ emission amount and the sixth CO₂ emission amount to calculate a seventh CO₂ emission amount which is the CO₂ emission amount discharged by the production of the predetermined lot, A management device that calculates an eighth CO₂ emission amount, which is the CO₂ emission amount per unit number of the product, by dividing the seventh CO₂ emission amount by the predetermined number.

2. When there is no CO₂ emission associated with the recycling for producing the second raw material, the control device sets the second CO₂ emission amount to zero. The management device according to claim 1.

3. A management method for managing the CO₂ emission amount discharged by the production of a product, The product is produced in a predetermined lot unit including a predetermined number of the products using a first raw material and a second raw material, which are the same type of raw materials, in a production line for producing the product. The first raw material is not a recycled product produced by recycling. The second raw material is the recycled product. The management method includes A step of reading out a first CO₂ emission amount, which is the CO₂ emission amount per unit weight of the first raw material, and a second CO₂ emission amount, which is the CO₂ emission amount per unit weight of the second raw material. The second CO₂ emission amount is calculated based on the amount of energy required to produce the second raw material by recycling. Further, A step of calculating a third CO₂ emission amount, which is the CO₂ emission amount of the first raw material used in the production of the predetermined lot, from the first CO₂ emission amount and the weight of the first raw material used in the production of the predetermined lot. A step of calculating a fourth CO₂ emission amount, which is the CO₂ emission amount of the second raw material used in the production of the predetermined lot, from the second CO₂ emission amount and the weight of the second raw material used in the production of the predetermined lot. A step of adding the third CO₂ emission amount and the fourth CO₂ emission amount to calculate a fifth CO₂ emission amount, which is the total of the CO₂ emission amounts of the first raw material and the second raw material used in the production of the predetermined lot. A step of calculating a sixth CO2 emission amount, which is the CO2 emission amount discharged in the production of the predetermined lot in the production line, based on the amount of electric power consumed in the production of the predetermined lot; A step of adding the fifth CO2 emission amount and the sixth CO2 emission amount to calculate a seventh CO2 emission amount, which is the CO2 emission amount discharged by the production of the predetermined lot; A management method including a step of calculating an eighth CO2 emission amount, which is the CO2 emission amount per unit number of the product, by dividing the seventh CO2 emission amount by the predetermined number.

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