JP7715093B2 - Emission calculation device - Google Patents

Description

This disclosure relates to an emission calculation device.

In order to reduce greenhouse gas emissions, it is important to understand current greenhouse gas emissions. Conventionally, there is technology for calculating emissions for each product using emissions from sources that handle multiple products, such as transportation means (Patent Document 1). With the technology in Patent Document 1, when calculating emissions for each individual item using emissions from sources such as transportation means that transport multiple individual items, the emissions for each individual item are calculated by apportioning them using weights that reflect the weight of the individual items.

JP 2011-022892 A

However, with the technology in Patent Document 1, the weight of an item is reflected in the greenhouse gas emissions for each item. As a result, there is a risk that the validity of greenhouse gas emissions cannot be properly evaluated.

The present disclosure can be realized in the following forms.
According to one aspect of the present disclosure, there is provided an emission calculation device for calculating greenhouse gas emissions. The emission calculation device includes: a communication unit that receives, for a plurality of workpieces flowing on a production line having a first position and a second position downstream of the first position, (i) traceability information, for each of the plurality of workpieces, including information on the time of passage at the first position and the time of passage at the second position, and (ii) energy usage information on energy used in operation of the production line; and an emission calculation unit, wherein the emission calculation unit uses the traceability information to perform a number acquisition process for acquiring the number of workpieces flowing on the production line for each of a plurality of unit periods obtained by dividing a distribution period from when the target workpiece passes the first position to when it passes the second position, using the traceability information; a usage amount acquisition process that uses the energy usage information to acquire unit energy usage, which is the energy usage for each of the plurality of unit periods; and a usage amount acquisition process that calculates, for each of the plurality of unit periods, the unit energy usage amount calculated by dividing the unit energy usage amount by the number of workpieces. The system executes a total calculation process that calculates the total energy usage of the target work during the distribution period by summing the energy usage of the work for each period, and a conversion process that calculates the emission amount by converting the total energy usage, wherein there are multiple production lines, and the multiple works flow sequentially through each of the multiple production lines, the emission calculation unit calculates the emission amount of the target work for each of the multiple production lines, and further executes a total emission calculation process that sums the emission amounts for each of the multiple production lines to calculate the total emission amount, the energy usage information is the amount of electricity used by manufacturing equipment arranged on any of the multiple production lines, and includes the amount of electricity usage per usage unit time that is longer than the time of the distribution period, and the emission calculation unit calculates and acquires the amount of electricity usage for each of the multiple unit periods using the amount of electricity usage per usage unit time in the usage acquisition process.

(1) According to one aspect of the present disclosure, there is provided an emission calculation device that calculates greenhouse gas emissions. The emission calculation device includes: a communication unit that receives, for a plurality of workpieces flowing on a production line having a first position and a second position downstream of the first position, (i) traceability information for each of the plurality of workpieces, the traceability information including information on the time of passage through the first position and the time of passage through the second position, and (ii) energy usage information on energy used in operation of the production line; and an emission calculation unit that uses the traceability information to calculate, for one of the plurality of workpieces as a target workpiece, a distribution period from when the target workpiece passed the first position to when it passed the second position. a number acquisition process for acquiring the number of workpieces flowing through the production line for each of a plurality of unit periods obtained by dividing the production line into a plurality of unit periods, a usage acquisition process for acquiring a unit energy usage that is the energy usage for each of the plurality of unit periods using the energy usage information, a total calculation process for calculating a total energy usage for the target workpiece during the distribution period by summing up the workpiece energy usage for each of the plurality of unit periods that is calculated by dividing the unit energy usage by the number of workpieces for each of the plurality of unit periods, and a conversion process for calculating the emission amount by converting the total energy usage. According to this aspect, the greenhouse gas emission amount for each workpiece can be accurately calculated, and therefore the validity of the emission amount for each workpiece can be appropriately evaluated.
(2) In the emission calculation device of the above aspect, there may be a plurality of production lines, the plurality of workpieces flow through each of the plurality of production lines in order, and the emission calculation unit may execute a total emission calculation process to calculate the emission amount of the target workpiece for each of the plurality of production lines and further calculate a total emission amount by adding up the emission amounts for each of the plurality of production lines. According to this aspect, it is possible to calculate the emission amount emitted in all of the plurality of production lines.
(3) In the emission calculation device of the above aspect, the energy usage information may include at least one of an amount of electricity used by a manufacturing device arranged in any one of the plurality of manufacturing lines, an amount of fuel gas used by the manufacturing device, and an amount of air used to feed the manufacturing device. According to this aspect, the emission amount can be calculated using any one of the amount of electricity used, the amount of fuel gas used, and the amount of air used.
(4) In the emission calculation device of the above aspect, the energy usage information may include an amount of electricity usage per usage unit time that is longer than the duration of the distribution period, and the emission calculation unit may calculate and acquire the amount of electricity usage for each of the plurality of unit periods using the amount of electricity usage per usage unit time in the usage amount acquisition process. According to this aspect, the amount of information of the energy usage information can be reduced compared to when the amount of electricity usage per unit period is used.
(5) In the emission calculation device of the above aspect, each of the plurality of works is assigned with identification information, and the emission calculation unit may calculate the emission amount for each of the plurality of works and further execute a creation process to create emission information in which the identification information and the emission amount correspond to each other. According to this aspect, the emission information corresponds between the identification information and the emission amount, so that the emission amount can be arranged in chronological order using the identification information and the traceability information, and an increase or decrease in the emission amount can be efficiently verified on a daily or seasonal basis.
The present disclosure can also be realized in various forms other than an emission calculation device, such as an emission calculation system including an emission calculation device and a storage device that stores traceability information and energy usage information, a control method for an emission calculation device, a computer program that realizes the control method, a non-transitory recording medium on which the computer program is recorded, etc.

FIG. 2 is a schematic diagram showing the configuration of an emission amount calculation device, a data server, and a production line. FIG. 3 is a diagram illustrating traceability information and energy usage information. A diagram showing the distribution period for each work against time. 10 is a flowchart of an emission amount calculation process. FIG. 10 is a schematic diagram showing the configuration of a discharge calculation device, a data server, and a production line according to a second embodiment. FIG. 11 is a diagram illustrating the distribution period of each workpiece with respect to time according to the second embodiment. FIG. 11 is a diagram illustrating energy usage information according to the second embodiment. 10 is a flowchart of a multi-line discharge amount calculation process according to the second embodiment.

A. First embodiment:
1 is a schematic diagram showing the configuration of an emission amount calculation device 10, a data server 100, and a production line L1. The emission amount calculation device 10 uses information stored in the data server 100 to calculate the amount of greenhouse gas emissions for each workpiece W flowing through the production line L1.

As shown in Figure 1, on production line L1, multiple workpieces W are transported by belt conveyor 50 in the transport direction indicated by the white arrow in Figure 1, and are sequentially processed by manufacturing equipment 51. Manufacturing equipment 51 operates using power supplied from power source 53.

Each workpiece W is assigned identification information to uniquely identify it. Specifically, each workpiece W is affixed with an identification mark M that symbolizes a serial number as identification information. In this embodiment, a QR code (registered trademark) is used as the identification mark M. Note that multiple workpieces W may have the same specifications or different specifications.

A reading device 54 is located at each of the first position P1 and the second position P2 downstream of the first position P1 on the production line L1. Each reading device 54 is equipped with an imaging unit 55. The imaging unit 55 is attached at a position where it can capture an image of the identification mark M attached to the workpiece W. The reading device 54 acquires the serial number by reading the identification mark M, and stores the date and time of the image capture as the passage time, correlating it with the acquired serial number. The reading device 54 also transmits a signal to the data server 100 that includes information on the correlated passage time and serial number.

In this embodiment, a QR code (registered trademark) is used as an identifier having identification information, but other types of identifiers, such as an RFID (Radio Frequency Identifier), can also be used as the identifier.

The power meter 52 transmits a signal indicating the amount of electricity supplied from the power source 53 to the manufacturing equipment 51 to the data server 100. In this embodiment, the power meter 52 transmits the amount of electricity per hour from the present to the data server 100 every hour. The data server 100 is capable of communicating with the emission amount calculation device 10.

The data server 100, which serves as a storage device, comprises a CPU 110, a storage unit 120, and a communication unit 130. The CPU 110 executes programs stored in the storage unit 120 and performs various processes. The communication unit 130 exchanges information with other information processing devices via a network. The storage unit 120 stores traceability information 122 and energy usage information 124. The traceability information 122 is information that is updated sequentially using information on the passage time and serial number that are associated with each other and transmitted from each reading device 54. Similarly, the energy usage information 124 is information that is updated sequentially using the amount of power transmitted from the wattmeter 52.

The emission amount calculation device 10 is configured as an information processing device including a CPU 12, a memory unit 16, and a communication unit 18. The CPU 12 executes programs stored in the memory unit 16 and performs various processes. The CPU 12 has an emission amount calculation unit 14. The emission amount calculation unit 14 is a functional unit realized when the CPU 12 executes programs stored in the memory unit 16. The communication unit 18 exchanges information with the data server 100 via a network. In the emission amount calculation process described below, the communication unit 18 receives traceability information 122 and energy usage information 124 stored in the memory unit 120. The network may be the Internet, a LAN (Local Area Network), or a WAN (Wide Area Network).

Figure 2 is a diagram illustrating traceability information 122 and energy usage information 124. Traceability information 122 includes information on the passing time of each of multiple workpieces W at first position P1 and second position P2. Specifically, as shown in Figure 2, traceability information 122 is information in which a serial number, a passing date and time as the passing time, and a passing location are associated with each other. "L1P1" in Figure 2 indicates first position P1 on production line L1. "L1P2" in Figure 2 indicates second position P2 on production line L1. Figure 2 shows that workpiece W with serial number "S01" passed first position P1 at 6:00 on January 18, 2022, and passed second position P2 at 6:04 on the same day.

Energy usage information 124 is information on the amount of energy used in the operation of production line L1. As shown in Figure 2, energy usage information 124 is data in which, for each corresponding production line, the detection time is associated with the amount of electricity used per hour, which is the amount of electricity used per unit time of usage. The "corresponding production line" refers to the production line in which the manufacturing equipment using energy is located. For example, "bb" in Figure 2 is the amount of electricity used by production line L1 for one hour from 5:00 to 6:00 on January 18, 2022. Note that in Figure 2, the "amount of electricity per minute" is information created in the emissions calculation process, which will be described later.

Figure 3 shows, for each workpiece W, the period from when it passes through the first position P1 on the production line L1 until it passes through the second position P2, plotted with diagonal hatching, against the time on the horizontal axis. For example, Figure 3 shows that the workpiece W with identification number "S01" passed through the first position P1 at 6:00 and the second position P2 at 6:04. As shown in Figure 3, in this embodiment, the workpiece W is loaded onto the production line L1 every minute. Furthermore, the circulation period DP from when each workpiece W passes through the first position P1 until it passes through the second position P2 is four minutes, which is shorter than the unit time of one hour for the amount of electricity included in the energy usage information 124.

Figure 4 is a flowchart of the emission amount calculation process executed by the emission amount calculation unit 14. The emission amount calculation process is performed on workpieces W that have finished flowing through the production line L1. The emission amount calculation unit 14 executes the emission amount calculation process using one of the multiple workpieces W as the target workpiece. In this embodiment, an example will be described in which the workpiece W with identification number "S05" is the target workpiece.

As shown in FIG. 4, in step S10, the emission calculation unit 14 sets the unit period UP shown in FIG. 3, which is the target of calculations in steps S12 to S16, described below. Here, the unit period UP is one period obtained by dividing the distribution period DP, as shown in FIG. 3. In this embodiment, the unit period UP is a period obtained by dividing the distribution period DP into four equal parts, and the duration of the unit period UP is one minute. For explanatory purposes, as shown in FIG. 3, the four unit periods UP for the target workpiece, workpiece W with identification number "S05," are referred to in order of earliest to latest as the first unit period UP1, second unit period UP2, third unit period UP3, and fourth unit period UP4. The emission calculation unit 14 sets the target unit period UP among the multiple unit periods UP in order of earliest time. In other words, in step S10, which is executed first after the emission calculation process is started, the first unit period UP1 is set as the target unit period UP.

4, the emission amount calculation unit 14 acquires the number WN of workpieces W flowing on the production line L1 in the target unit period UP using the traceability information 122. As shown in FIG. 3, in the first unit period UP1, four workpieces W with identification numbers "S02" to "S05" flow on the production line L1. Therefore, the number WN of workpieces acquired in step S12 is "4."

In step S14 shown in FIG. 4, the emission amount calculation unit 14 uses the energy usage information 124 to obtain the unit energy usage UE for the first unit period UP1. Here, unit energy usage UE is the energy usage per unit period UP. Specifically, in step S14, the emission amount calculation unit 14 divides the "amount of electricity per hour" in FIG. 2 by the value 60 to calculate the "amount of electricity per minute." For ease of explanation, FIG. 2 also lists the "amount of electricity per minute." The first unit period UP1 is the period starting at 6:04 on January 18, 2022. Therefore, specifically, in step S14, the unit energy usage UE is obtained as fkWh, which is the value calculated by dividing cckWh, the amount of electricity per hour detected at 7:00 on January 18, 2022 shown in FIG. 2, by the value 60.

In step S16 shown in FIG. 4, the emission amount calculation unit 14 calculates the work energy consumption amount WE by dividing the unit energy consumption amount UE by the number of workpieces WN. The calculated work energy consumption amount WE is f/4 kWh.

In step S18, the emission calculation unit 14 determines whether the work energy usage amount WE has been calculated for all unit periods UP. If it determines that the work energy usage amount WE has not been calculated (step S18: NO), the emission calculation unit 14 returns the process to step S10.

The emission amount calculation unit 14 also executes steps S10 to S16 for the unit periods UP from the second unit period UP2 to the fourth unit period UP4 in the same manner as above. In this embodiment, as shown in FIG. 3, the number of workpieces WN is "4" in all unit periods UP from the second unit period UP2 to the fourth unit period UP4. The unit energy usage UE is f kWh in all unit periods UP from the second unit period UP2 to the fourth unit period UP4. Therefore, the work energy usage WE is f/4 kWh in all unit periods UP from the second unit period UP2 to the fourth unit period UP4.

4, when it is determined that the work energy consumption WE has been calculated for all unit periods UP (step S18: YES), the emission calculation unit 14 calculates the total energy consumption TE by adding up the work energy consumption WE for all unit periods UP in the distribution period DP (step S20). In this embodiment, the work energy consumption WE for the four unit periods UP from the first unit period UP1 to the fourth unit period UP4 is f/4 kWh. Therefore, the total energy consumption TE is f kWh.

In step S22, the emission calculation unit 14 converts the total energy usage TE into the amount of greenhouse gas emissions. In this embodiment, the greenhouse gas is carbon dioxide. Then, the emission calculation unit 14 calculates the amount of emissions for the production line L1 of the workpiece W whose serial number is "S05" using a conversion formula that converts the amount of electricity pre-stored in the memory unit 16 into carbon dioxide emissions [g]. After executing step S22, the emission calculation unit 14 terminates this processing routine.

The emission calculation process allows the amount of emission for each workpiece W to be calculated using the amount of electricity used by the manufacturing equipment 51. This allows the appropriateness of the emission amount to be appropriately evaluated. Specifically, for example, by comparing the emission amounts for multiple workpieces W with the same specifications, it is possible to check fluctuations in emission amounts over the course of a day. It is also possible to compare the emission amounts for multiple workpieces W with different specifications. Then, by comparing the emission amounts, it is possible to review the material, size, design, etc. of the workpieces W in order to reduce emission amounts.

Step S12 is also referred to as the quantity acquisition process, step S14 is also referred to as the usage amount acquisition process, step S20 is also referred to as the total calculation process, and step S22 is also referred to as the conversion process.

According to the first embodiment described above, the emission amount calculation device 10 includes an emission amount calculation unit 14. In step S12, the emission amount calculation unit 14 uses the traceability information 122 to acquire the number of workpieces WN for each unit period UP of the target workpiece. In step S14, the emission amount calculation unit 14 also uses the energy usage information 124 to acquire the unit energy usage UE for each unit period UP. In step S20, the emission amount calculation unit 14 then calculates the total energy usage TE by summing the workpiece energy usage WE calculated for each unit period UP. In step S22, the emission amount calculation unit 14 converts the total energy usage TE to calculate the amount of greenhouse gas emissions. This allows the amount of greenhouse gas emissions for each workpiece W to be calculated with high accuracy, thereby enabling the appropriateness of the emissions to be appropriately evaluated.

The energy usage information 124 also includes the amount of electricity per hour, which is longer than the duration of the distribution period DP. In step S14, the emission amount calculation unit 14 then calculates and obtains the amount of electricity used per unit period UP using the amount of electricity per hour. This allows the amount of information in the energy usage information 124 to be reduced compared to when the energy usage information 124 includes the amount of electricity used per unit period UP.

B. Second embodiment:
FIG. 5 is a schematic diagram showing the configuration of the emission calculation device 10, data server 100, and production lines L1 to L3 according to this embodiment. FIG. 6 is a diagram illustrating the period from when each workpiece W passes through a first position P1 on each production line L to when it passes through a second position P2, versus time on the horizontal axis, for each workpiece W according to this embodiment. FIG. 7 is a diagram explaining energy usage information 2124 according to this embodiment. FIG. 8 is a flowchart of the multiple line emission calculation process according to this embodiment. This embodiment differs from the first embodiment in that, since there are three production lines L, the emission calculation device 10 calculates greenhouse gas emissions for the three production lines L. The same components as those in the first embodiment are designated by the same reference numerals, and detailed descriptions thereof will be omitted as appropriate.

As shown in FIG. 5, in this embodiment, multiple workpieces W flow sequentially through production line L1, followed by production line L2 and production line L3. Production line L2 and production line L3 are collectively referred to as production line L. Manufacturing device 151 arranged on production line L2 is a heating furnace that heats the workpieces W. Manufacturing device 151 uses fuel gas supplied from a commercial fuel gas supply source 153, such as city gas, to heat the heating furnace. Manufacturing device 251 arranged on production line L3 is a cooling device that cools the workpieces W. Manufacturing device 251 uses compressed air supplied from an air compressor 253 for cooling. In this embodiment, the amount of air consumed by air compressor 253 to supply air to manufacturing device 251 is used to calculate the amount of carbon dioxide emissions resulting from the electricity used by air compressor 253.

Flow meter 152 transmits a signal indicating the flow rate of fuel gas supplied from fuel gas supply source 153 to manufacturing equipment 151 to data server 100. Flow meter 252 transmits a signal indicating the flow rate of compressed air supplied from air compressor 253 to manufacturing equipment 251 to data server 100. In this embodiment, flow meter 152 and flow meter 252, like power meter 52, transmit the flow rate per hour from the present to the data server 100 every hour.

As shown in FIG. 6 , in this embodiment, workpieces W are input to production lines L1, L2, and L3 every minute. To distinguish between the different circulation periods DP, the circulation periods DP for production lines L1 through L3 are referred to as the first circulation period DP1, the second circulation period DP2, and the third circulation period DP3, respectively. The circulation period DP for each workpiece W from passing through the first position P1 on production line L2 to passing through the second position P2 is two minutes. The circulation period DP for each workpiece W from passing through the first position P1 on production line L3 to passing through the second position P2 is also two minutes. In the multiple line emission calculation process described below, the unit period UP for the second circulation period DP2 and the third circulation period DP3 is set to one minute, similar to the first circulation period DP1. Therefore, two unit periods UP are set for both the second circulation period DP2 and the third circulation period DP3.

As shown in FIG. 7, the energy usage information 2124 according to this embodiment includes information on the amount of electricity used as the amount of power, the gas flow rate as the amount of fuel gas used, and the air flow rate as the amount of air used, corresponding to the three production lines L. The amount of electricity shown in FIG. 7 is the amount of electricity used as the amount of power used by the manufacturing equipment 51 (FIG. 5) arranged on production line L1. The gas flow rate is the flow rate of the fuel gas used as the amount of fuel gas used by the manufacturing equipment 151 (FIG. 5) arranged on production line L2. The air flow rate is the flow rate of the air sent to the manufacturing equipment 251 arranged on production line L3 as the amount of air used.

8 , the present embodiment will be described by taking as an example a case where the workpiece W with identification number "S05" is the target workpiece. In step S40, the emission calculation unit 14 sets the target production line L for the next step S42. In this embodiment, the emission calculation unit 14 sets the target production lines L in the order of production line L1, production line L2, and production line L3. That is, in S40, which is executed first after the start of the multiple line emission calculation process, production line L1 is set as the target production line L.

In step S42, the emission amount calculation unit 14 executes the emission amount calculation process, which is a subroutine. The processing content of the emission amount calculation process is the same as the emission amount calculation process shown in FIG. 4 described in the first embodiment. In step S42, which is executed first after the multiple line emission amount calculation process is started, the emission amount for the target workpiece on production line L1 is calculated.

In step S44, the emission calculation unit 14 determines whether the emission amounts have been calculated for all production lines L. If it determines that the emission amounts have not been calculated for all production lines L (step S44: NO), the emission calculation unit 14 returns the process to step S40.

The emission calculation unit 14 also executes steps S40 and S42 for the production lines L2 and L3. Because the number of workpieces WN differs between the production lines L2 and L3 and the production line L1, the calculation of the emission amount for the production line L2 will be described as a representative example. As shown in FIG. 6 , in the first unit period UP of the second distribution period DP2 with the serial number "S05," two workpieces W with identification numbers "S04" and "S05" flow through the production line L2. Therefore, the number of workpieces WN acquired in step S12 ( FIG. 4 ) is "2." The second distribution period DP2 with the serial number "S05" begins at 6:08 AM on January 18, 2022. Therefore, as shown in FIG. 7 , the gas flow rate per hour is ii ^Nm³ , and the gas flow rate per minute is ⁱⁱ /60 Nm³. Therefore, the work energy consumption amount WE for the first unit period UP of the second circulation period DP2 having the serial number "S05", calculated in step S16 (FIG. 4), is ii/120 ^Nm3 . The work energy consumption amount WE is calculated similarly for the second unit period UP of the second circulation period DP2 and the second circulation period DP2.

As shown in FIG. 8, if it is determined that the emissions have been calculated for all production lines L (step S44: YES), the emissions calculation unit 14 adds up the emissions for all production lines L to calculate the total emissions (step S46).

In step S48, the emission amount calculation unit 14 creates emission information that associates serial numbers with total emission amounts, stores the created emission information in the memory unit 16, and terminates this processing routine. By creating emission information that associates serial numbers with total emission amounts, it is possible to arrange emission amounts in chronological order using the serial numbers and traceability information 122. Using the emission amounts arranged in chronological order, it is possible to efficiently verify increases or decreases in emission amounts on a daily or seasonal basis.

Step S46 is also referred to as the total emission calculation process, and step S48 is also referred to as the creation process.

The second embodiment described above achieves the same effects as the first embodiment. Furthermore, the emission amount calculation unit 14 calculates the emission amount for each of the multiple production lines L in step S42, and then calculates the total emission amount by adding up all of the emission amounts in step S46. This makes it possible to calculate the emission amount for all of the production lines L, from production line L1 to production line L3. Furthermore, by comparing the emission amounts for each of the multiple production lines L for the same workpiece W, it is possible to identify the production line L with the largest emission amount among the multiple production lines L.

In addition, the energy usage information 2124 includes the amount of electricity used by the manufacturing equipment 51, the amount of fuel gas used by the manufacturing equipment 151, and the amount of air supplied to the manufacturing equipment 251. This allows the amount of electricity, the amount of fuel gas used, and the amount of air used to be used as energy usage information that is a source of greenhouse gas emissions.

In addition, in step S48, the emission amount calculation unit 14 creates emission information that associates serial numbers with total emission amounts. This allows emissions to be arranged in chronological order using serial numbers, making it possible to efficiently verify increases or decreases in emission amounts on a daily or seasonal basis.

C. Other Embodiments:
(C1) In the emission amount calculation process of the first embodiment, the process is performed in the order of step S12 and step S14, but the order of the steps is not limited to the above.

(C2) In the first embodiment described above, the unit energy usage UE is calculated and acquired each time in step S14 of the emission amount calculation process. The method for acquiring the unit energy usage UE is not limited to this. For example, the emission amount calculation unit 14 may calculate the "amount of electricity per minute" for all time periods in advance and store it in the memory unit 16, and in step S14, acquire the amount by referring to the information stored in the memory unit 16.

(C3) In the multiple line emission amount calculation process according to the second embodiment, in step S42, the emission amount is calculated for each of the multiple production lines L, and then in step S46, the multiple emission amounts are added together. Alternatively, if the conversion coefficient for converting energy usage into emission amount is the same, the energy usage amounts of the multiple production lines L may be added together, and then the energy usage may be converted into emission amount to calculate the emission amount for each workpiece W.

(C4) The manufacturing apparatus 51 according to the first embodiment performs processing on the workpiece W. The present application can be applied to manufacturing apparatus 51 that uses electricity, regardless of the type of work performed on the workpiece W by the manufacturing apparatus 51. The same applies to manufacturing apparatus 151 and manufacturing apparatus 251 according to the second embodiment. For example, manufacturing apparatus 151 may be an apparatus equipped with a burner that uses fuel gas. Manufacturing apparatus 251 may be an air blowing apparatus equipped with a compressor. Furthermore, in each of the above embodiments, a case where one type of energy is used for one manufacturing apparatus has been described. The present application can also be applied to a case where multiple types of energy are used for one manufacturing apparatus. In this case, it is advisable to apply an emission calculation process for each type of energy.

(C5) In the second embodiment described above, two reading devices 54 are provided on each of production lines L1 to L3. If the production lines L are continuous, a single reading device 54 may be used to read the passage time at second position P2 on the upstream production line L and the passage time at first position P1 on the downstream production line L. Also, in the second embodiment described above, the workpiece W flows continuously through production lines L1 and L2. However, this is not limited to this, and the present application can also be applied to cases where there is a time gap between when the workpiece W finishes flowing through production line L1 and when it is input into production line L2.

(C6) In the first embodiment described above, the traceability information 122 associates a serial number as identification information with the time of passage through the first position P1 and the time of passage through the second position P2. The method for identifying individual workpieces W in the traceability information 122 is not limited to identification information. According to the emission amount calculation process, the emission amount for each workpiece W can be calculated using the number of workpieces W and the amount of energy used in a specific time period. Therefore, for example, it is also possible to identify individual workpieces W in the order in which they were inserted during the time period being calculated.

This disclosure is not limited to the above-described embodiments, and can be realized in various configurations without departing from its spirit. For example, the technical features of the embodiments corresponding to the technical features in each aspect described in the Summary of the Invention section can be replaced or combined as appropriate to solve some or all of the above-described problems or achieve some or all of the above-described effects. Furthermore, if a technical feature is not described as essential in this specification, it can be deleted as appropriate.

10...emission calculation device, 12, 110...CPU, 14...emission calculation unit, 16, 120...storage unit, 18, 130...communication unit, 50...belt conveyor, 51, 151, 251...manufacturing equipment, 52...power meter, 53...power source, 54...reading device, 55...imaging unit, 100...data server, 122...traceability information, 124, 2124...energy usage information, 152, 252... Flow meter, 153...fuel gas supply source, 253...air compressor, DP...flow period, DP1...first flow period, DP2...second flow period, DP3...third flow period, L, L1-L3...production line, M...identification mark, P1...first position, P2...second position, UP...unit period, UP1...first unit period, UP2...second unit period, UP3...third unit period, UP4...fourth unit period, W...workpiece

Claims (2)

An emission calculation device for calculating greenhouse gas emissions,
a communication unit that receives, for a plurality of workpieces flowing on a production line having a first position and a second position downstream of the first position, (i) traceability information including information on the time each of the plurality of workpieces passed through the first position and the time each of the plurality of workpieces passed through the second position, and (ii) energy usage information on energy used in the operation of the production line;
an emission calculation unit,
The emission calculation unit
a number acquisition process that acquires the number of workpieces flowing through the production line for each of a plurality of unit periods obtained by dividing a distribution period from when the target workpiece passes through the first position to when the target workpiece passes through the second position, using the traceability information;
a usage amount acquisition process for acquiring unit energy usage amounts, which are energy usage amounts for each of the plurality of unit periods, using the energy usage amount information;
a total calculation process for calculating a total energy consumption of the target work in the distribution period by summing up the work energy consumptions for the plurality of unit periods, the work energy consumptions being calculated by dividing the unit energy consumption by the number of works for each of the plurality of unit periods;
a conversion process for calculating the emission amount by converting the total energy consumption amount ;
There are a plurality of the manufacturing lines, and the plurality of works flow through each of the manufacturing lines in order,
The emission amount calculation unit calculates the emission amount of the target work for each of the plurality of production lines, and further
executing a total emission calculation process for calculating a total emission by adding up the emission amounts for each of the plurality of production lines;
the energy usage information is a power usage amount of power used by a manufacturing device disposed in any one of the plurality of manufacturing lines, and includes a power usage amount per usage unit time longer than a time of the distribution period;
In the usage amount acquisition process, the emission amount calculation unit
an emission calculation device that calculates and obtains the amount of power usage for each of the plurality of unit periods using the amount of power usage per usage unit time . The emission calculation device according to claim 1 ,
Identification information is assigned to each of the plurality of works,
The discharge amount calculation unit calculates the discharge amount for each of the plurality of works, and further
an emission calculation device that executes a creation process for creating emission information that associates the identification information with the emission amount;