JP5766532B2 - Environmental impact calculation device and environmental impact calculation method - Google Patents

Description

  Embodiments described herein relate generally to an environmental impact calculation apparatus and an environmental impact calculation method.

  Conventionally, the environmental impact assessment of a storage battery that charges and discharges the power generation output includes the impact of the materials and energy used in the production stage, the impact of the average charge / discharge loss in the life cycle at the use stage, and the disposal stage. The impact of the disposal phase taking into account the average recycling scenario is included.

  That is, in such an evaluation, the influence of the performance deterioration of the storage battery at the use stage is an average value or a representative value, and the other stages are similarly the average value or the representative value, so that the environmental influence of the storage battery is a constant value.

On the other hand, the environmental impact of the power generation facility where the storage battery is installed increases as the charge / discharge loss characteristics of the battery deteriorate. For example, an increase in the loss of the storage battery means an increase in the energy loss of the generator in which the storage battery is installed, and the other power source bears the generated power accordingly. Here, the other power source is generally a system power source, and the system power source is not a low-carbon power source, so that environmental influences such as CO ₂ emissions increase. It is desirable to include the influence due to the deterioration of the characteristics of the storage battery in the environmental impact calculation used for the basis of economic transactions such as CO ₂ emission trading from the viewpoint of improving accuracy.

JP 2006-49777 A

Keisuke Hatakeyama, Keiichi Okajima, Yoji Uchiyama “Energy / Environmental Improvement Effect by Leveling Battery Loads from the Life Cycle” Journal of LCA, vol2. No.4 October 2006

  The present invention has been made in view of the above circumstances, and an object thereof is to provide an environmental impact calculation apparatus and an environmental impact calculation method that present a more accurate power generation unit by a method that takes into account deterioration of a storage battery. And

According to the embodiment, an environmental impact calculation device that calculates a power generation intensity of a power generation facility including a power generation source and a storage battery charged by the power generation source, an evaluation range setting unit that sets an evaluation range, and a power generation source A power generation information acquisition unit for acquiring an average value of the power generation basic unit from a power generation information database storing an average value of the basic unit, and at least environmental load information at the time of manufacturing the storage battery and a discharge capacity at the time of use of the storage battery Alternatively, a battery characteristic acquisition unit that acquires the battery characteristic information in the evaluation range from a battery characteristic database that stores battery characteristic information relating to a change in charge / discharge loss, and a battery state database that stores battery state information when the storage battery is used from a battery state acquisition unit for acquiring the battery state information in the evaluation range, and the power generation source information obtaining unit, the battery JP Based on the information acquired by the acquisition unit and the battery state acquisition unit, a battery basic unit calculation unit that calculates a battery basic unit considering charge / discharge loss of the storage battery, and a battery basic unit of the storage battery A power generation unit calculation unit for calculating the power generation unit is provided.

It is a figure for demonstrating an example of the power generation equipment which calculates a power generation basic unit in 1st Embodiment. It is a figure which shows roughly the example of 1 structure of the environmental influence calculation apparatus of 1st Embodiment. It is a figure which shows an example of the deterioration characteristic of the discharge capacity with respect to the number of annual charging / discharging cycles of a storage battery. It is a figure which shows an example of the deterioration characteristic of the discharge capacity with respect to the annual average of the operating temperature of a storage battery. It is a figure which shows an example of the deterioration characteristic of the discharge capacity with respect to the annual average of the depth of discharge of a storage battery. It is a figure which shows an example of the characteristic of the charging / discharging loss change rate with respect to the number of annual charging / discharging cycles of a storage battery. It is a figure which shows an example of the characteristic of the charging / discharging loss change rate with respect to the annual average of the operating temperature of a storage battery. It is a figure which shows an example of the characteristic of the charging / discharging loss change rate with respect to the annual average of the depth of discharge of a storage battery. FIG. 4 is a diagram showing an example of a reduction rate of discharge capacity with respect to the number of charge / discharge cycles as a reference in the example of deterioration characteristics shown in FIG. 3. FIG. 5 is a diagram illustrating an example of a rate of decrease in discharge capacity with respect to an annual average of reference operating temperatures in the example of deterioration characteristics illustrated in FIG. 4. FIG. 6 is a diagram illustrating an example of a rate of decrease in discharge capacity with respect to an annual average of discharge depths as a reference in the example of deterioration characteristics illustrated in FIG. 5. FIG. 7 is a diagram showing an example of a change in charge / discharge loss change rate with respect to a reference value in the example of the deterioration characteristic shown in FIG. 6. FIG. 8 is a diagram showing an example of a change in charge / discharge loss change rate with respect to a reference value in the example of the deterioration characteristic shown in FIG. 7. FIG. 9 is a diagram showing an example of a change in charge / discharge loss change rate with respect to a reference value in the example of the deterioration characteristic shown in FIG. 8. It is a figure for demonstrating an example of the power generation equipment which calculates a power generation basic unit in 2nd Embodiment. It is a figure which shows roughly the example of 1 structure of the environmental influence calculation apparatus of 2nd Embodiment. It is a figure which shows roughly the example of 1 structure of the environmental influence calculation apparatus of 3rd Embodiment. It is a figure which shows roughly the example of 1 structure of the environmental influence calculation apparatus of 4th Embodiment. It is a figure which shows roughly the example of 1 structure of the environmental influence calculation apparatus of 5th Embodiment. It is a figure for demonstrating an example of the operation | movement which calculates a cell and a storage battery state in the environmental influence calculation apparatus of 5th Embodiment.

Hereinafter, an environmental impact calculation apparatus and an environmental impact calculation method of an embodiment will be described with reference to the drawings. In the following description, CO ₂ emission is taken up as an index for environmental impact assessment, but other indicators such as SOx emission and NOx emission may be used.

FIG. 1 schematically shows a power generation facility that calculates a power generation basic unit [g-CO ₂ / kWh] in the present embodiment. In the present embodiment, the power generation intensity of a power generation facility including a storage battery including a plurality of secondary battery cells and a power generation source such as a solar power generation device is calculated. The power generation source charges the storage battery and outputs generated power. The total power generation amount of the power generation facility is the sum of the power generation amount output from the power generation source and the discharge amount of the storage battery. In a certain evaluation range, for example, the power generation unit of the power generation source is 40 [g-CO ₂ / kWh] and the battery unit of the storage battery is 120 [g-CO ₂ / kWh]. basic unit is _{50 [g-CO 2 / kWh} ].

  FIG. 2 shows a configuration example of the environmental impact calculation apparatus of the first embodiment. The environmental impact calculation apparatus according to the present embodiment calculates the environmental impact (power generation intensity) of a power generation facility including a storage battery for a power generation facility such as a solar power generation system provided with a storage battery. A battery characteristic database 31 storing environmental load information at the time of battery manufacture and performance deterioration information of charge / discharge loss when using the battery, a battery state database 41 storing information regarding the battery usage status, the calculation unit 1, It has.

  A display unit 3, an input unit 5, and an I / O interface 7 are connected to the environmental impact calculation apparatus. The display unit 3 is a display device such as a liquid crystal display or an organic EL display. The input unit 5 may be input means such as a keyboard or a mouse, or may be input means integrated with the display unit 3 such as a touch panel. The I / O interface 7 includes a communication interface, a USB interface, i. Link (registered trademark) interface, HDMI interface conforming to HDMI (High Definition Multimedia Interface) standard, and the like.

The power generation information database 21 stores the average value of the power generation unit [g-CO ₂ / kWh] in the life cycle of the power generation. This value is calculated in advance and stored in the power generation information database 21.

The battery characteristic database 31 includes the total battery discharge [kWh] during the life of the storage battery, the CO ₂ emission during manufacture of the storage battery (manufacturing CO ₂ : material consumption load and manufacturing energy load), and the lifetime of the storage battery when it is used. CO ₂ emissions due to charge / discharge loss (charge / discharge CO ₂ ), CO ₂ emissions at the time of storage battery disposal (waste CO ₂ ), and deterioration characteristics of the storage battery against cycle effects, temperature effects, discharge depth effects, etc. are stored ing.

  The battery status database 41 stores storage battery status information. The storage battery status information refers to the discharge amount within the evaluation period, the specified period discharge amount, the battery usage period over time, the number of cycles the battery has been charged and discharged, and the average usage temperature that indicates the status of the battery. , Average discharge depth representing the depth of charge / discharge, and the like.

  Note that the storage battery state information stored in the battery state database 41 may be automatically updated from an operation planning system that manages storage batteries included in the power generation facility. By automatically acquiring storage battery status information, it is possible to calculate power generation intensity using the latest data.

  Various information stored in the power generation information database 21, battery characteristic database 31, and battery state database 41 may be automatically updated via a network such as a LAN. In this case, various information stored in the power generation information database 21, the battery characteristic database 31, and the battery state database 41 are automatically updated even when the environmental impact calculation device and the power generation facility are remotely located. In addition to being able to calculate the power generation intensity using the latest data, the calculation results can be easily used even when the evaluator is remote.

  In the case illustrated in FIG. 2, the environmental impact calculation apparatus includes the power generation information database 21, the battery characteristic database 31, and the battery state database 41. These databases are provided outside the environmental impact calculation apparatus. It may be a database.

Next, the structural example of the calculating part 1 and the calculation method of the power generation basic unit in the calculating part 1 are demonstrated.
The computing unit 1 generates power by using the environmental load calculation result of the storage battery according to the usage situation calculated based on the information stored in the power generation information database 21, the battery characteristic database 31, and the battery state database 41. Calculate the power generation intensity at the specified point in the life cycle period of the facility.

  The calculation unit 1 includes an evaluation range setting unit 10, a power generation information acquisition unit 20, a battery characteristic acquisition unit 30, a battery state acquisition unit 40, a battery basic unit calculation unit 50, a power generation basic unit calculation unit 60, A result output unit 70.

The evaluation range setting unit 10 is a condition necessary for evaluation, such as target equipment, target environmental impact factors (CO ₂ emissions, global warming impact, water area impact, ecosystem impact, etc.), target life cycle range, etc. In addition to the above, the evaluation target time for grasping the battery deterioration state is set. The evaluation target time is usually the latest time zone at the time of evaluation, and is set to “from what time to what time on what year, what day”. For example, when the user operates the input unit 5, a predetermined evaluation target time is input to the evaluation range setting unit 10.

The power generation information acquisition unit 20 acquires an average value of the power generation basic unit [g-CO ₂ / kWh] at the time set by the evaluation range setting unit 10 from the power generation information database 21, and the battery characteristic acquisition unit Output to 30.

The battery characteristic acquisition unit 30 acquires the average value of the power generation unit intensity [g-CO ₂ / kWh] from the power generation information acquisition unit 20, and the lifetime total battery discharge [kWh] from the battery characteristic database 31. In addition to manufacturing CO ₂ , charge / discharge CO ₂ , and waste CO ₂ , deterioration characteristics (change in discharge capacity and charge / discharge loss when using the battery) such as cycle effect, temperature effect, and discharge depth effect are acquired. The battery characteristic acquisition unit 30 outputs the information acquired from the battery characteristic database 31 together with the information acquired from the power generation information acquisition unit 20 to the battery state acquisition unit 40.

FIG. 3 to FIG. 5 show examples of the reduction in discharge capacity as an example of the deterioration characteristics of the storage battery.
FIG. 3 is a diagram illustrating an example of the influence of the charge / discharge cycle on the discharge capacity [Ah / Ah] of the storage battery. In the case shown in FIG. 3, the deterioration characteristics of the storage battery are stored for each yearly charge / discharge cycle. The larger the number of charge / discharge cycles per year, the smaller the discharge capacity with age.

  FIG. 4 is a diagram illustrating an example of the influence of temperature on the discharge capacity [Ah / Ah] of the storage battery. In FIG. 4, deterioration characteristics are stored for each average temperature of the environment in which the storage battery is used. The higher the average temperature of the environment in which the storage battery is used, the smaller the discharge capacity with age.

  FIG. 5 is a diagram illustrating an example of the influence of the depth of discharge on the discharge capacity [Ah / Ah] of the storage battery. In FIG. 5, the deterioration characteristics are stored for each year average of the discharge depth of the storage battery. The larger the annual average value of the discharge depth of the storage battery, the smaller the discharge capacity according to aging.

6 to 8 show examples of increasing charge / discharge loss as another example of the deterioration characteristics of the storage battery.
FIG. 6 is a diagram showing an example of the influence of the charge / discharge cycle on the charge / discharge loss change rate [%] of the storage battery. In the case shown in FIG. 6, the deterioration characteristics of the storage battery are stored for each number of charge / discharge cycles per year. As the number of charge / discharge cycles per year increases, the charge / discharge loss increases with age.

  FIG. 7 is a diagram illustrating an example of the influence of temperature on the charge / discharge loss change rate [%] of the storage battery. In FIG. 7, deterioration characteristics are stored for each average temperature of the environment in which the storage battery is used. As the average temperature of the environment in which the storage battery is used is higher, the charge / discharge loss increases with age.

  FIG. 8 is a diagram illustrating an example of the influence of the depth of discharge on the charge / discharge loss change rate [%] of the storage battery. In FIG. 8, the deterioration characteristic is stored for each year average of the discharge depth of the storage battery. As the annual average value of the discharge depth of the storage battery increases, the charge / discharge loss increases with age.

  The battery state acquisition unit 40 acquires storage battery state information stored in the battery state database 41. The state information is a specified period discharge amount that is the discharge amount within the evaluation period set by the evaluation range setting unit 10, the aging period of the battery, the number of charge / discharge cycles so far, and the environment where the storage battery is placed. Average discharge depth, average discharge depth representing the depth of charge / discharge, and the like. The battery state acquisition unit 40 outputs the storage battery state information to the battery basic unit calculation unit 50 together with the information received from the battery characteristic acquisition unit 30.

The battery basic unit calculation unit 50 calculates the battery basic unit [g-CO ₂ / kWh] using the information acquired by the battery characteristic acquisition unit 30 and the battery state acquisition unit 40 as follows. The lifetime total discharge amount [kWh] and the charge / discharge loss [kWh] determined according to the battery state in the following calculation formula can be determined as follows.

Lifetime total discharge amount (variable) [kWh] = Lifetime total discharge amount (reference value) [kWh] × Discharge capacity change rate (variable) [%]
Here, the lifetime total discharge amount (reference value) is a value assumed or measured at the time of design or product test. On the other hand, the discharge capacity change rate (variable) [%] is obtained by applying the conditions of the storage battery to be calculated to the characteristics shown in FIGS. Calculation examples will be described with reference to FIGS. In FIG. 9 to FIG. 11, the characteristic of the reference value used when the lifetime total discharge amount (reference value) is determined is indicated by a dotted line.

  For example, in FIG. 9, the reference cycle number is 4000 cycles / year. On the other hand, the target storage battery is in a state indicated by a blue dot (5000 cycles / year, reaching the aging age indicated by the dotted line), and the discharge capacity is 10% lower than the reference value. Similarly, in FIG. 10, the discharge capacity of the calculation target storage battery is 7% lower than the reference value due to the temperature effect, and in FIG. 11, the discharge capacity of the calculation target storage battery is 15% lower than the reference value due to the influence of the depth of discharge. The discharge capacity change rate (variable) in this case is calculated by the following equation. Here, X0 is a cycle influence coefficient, Y0 is a temperature influence coefficient, Z0 is a discharge depth influence coefficient, and is a coefficient indicating the influence of each storage effect on the discharge capacity change of the storage battery, and is set for each storage battery.

Discharge capacity change rate (variable) [%] = 10% × X0 + 7% × Y0 + 15% × Z0
Here, although the discharge capacity change rate of the target storage battery is obtained from the characteristic graph, it may be obtained using a table prepared in advance.

Charge / discharge loss (variable) [kWh] = Charge / discharge loss reference value (initial value) [kWh] × Charge / discharge loss change rate (variable) [%]
Here, the charge / discharge loss reference value is a value assumed or measured at the time of design or product test. On the other hand, the charge / discharge loss change rate (variable) [%] is obtained by applying the conditions of the storage battery to be calculated to the characteristics shown in FIGS. Calculation examples will be described with reference to FIGS. In FIG. 12 to FIG. 14, the characteristic of the charge / discharge loss reference value (initial value) is indicated by a dotted line.

  For example, in FIG. 12, the target storage battery is in a state indicated by a blue dot with respect to the reference value (initial value) (5000 cycles / year, reaching the age indicated by the dotted line), and the change in charge / discharge loss Is 3% higher than the reference value. Similarly, in FIG. 13, the charge / discharge loss of the calculation target storage battery is increased by 2% with respect to the reference value due to the temperature effect, and in FIG. 14, the charge / discharge loss of the calculation target storage battery is increased by 1% with respect to the reference value due to the influence of the depth of discharge. Yes. In this case, the charge / discharge loss change rate (variable) is calculated by the following formula. Here, X1 is a cycle influence coefficient, Y1 is a temperature influence coefficient, Z1 is a discharge depth influence coefficient, and is a coefficient indicating the influence of each storage effect on the charge / discharge loss of the storage battery, and is set for each storage battery.

Charge / discharge loss change rate (variable) [%] = 3% × X1 + 2% × Y1 + 1% × Z1
Here, the charge / discharge loss change rate of the target storage battery is obtained from the characteristic graph, but may be obtained using a table prepared in advance.

Battery basic unit (variable) = (Manufacturing CO ₂ + Waste CO ₂ ) / Lifetime total discharge amount (variable) [kWh] + Charge / discharge loss CO ₂ (variable) during specified period / Total discharge amount during specified period [ kWh]
Charging / discharging loss during specified period CO ₂ (variable) = Power generation unit (constant) [g−CO ₂ / kWh] × Charging / discharging loss during specified period (variable) [kWh]
Power generation basic unit (constant) = (Manufacturing CO ₂ + Power generation CO ₂ + Waste CO ₂ ) [g-CO ₂ ] / Lifetime total power generation amount [kWh]
The power generation unit calculation unit 60 calculates the power generation unit [g-CO ₂ / kWh] using the battery unit calculated by the battery unit calculation unit 50 as follows.
Power intensity = total in (power MinamotoGen unit _{(constant) [g-CO 2 / kWh} ] power amount + cell intensity of × power source _{[g-CO 2 / kWh]} × battery discharge amount) / specified periods Electric-generating capacity
The power generation unit calculation unit 60 outputs the calculated power generation unit [g-CO ₂ / kWh] at the result output unit 70. The result output unit 70 may output the calculation result to the display included in the environmental impact calculation device, the display unit 3 connected to the outside, and the like, and present it to the user. The result output unit 70 uses the calculation result via the I / O interface 7. May be output to another system.

  Next, the case where the deterioration of a storage battery is not considered as a comparative example will be described. When the deterioration of the storage battery is not taken into consideration, the power generation intensity calculation unit calculates the power generation intensity by the following formula.

Power generation intensity = Power generation intensity (constant) + Battery intensity
Battery basic unit (constant) = (Production CO ₂ + Lifetime total charge / discharge loss CO ₂ + Waste CO ₂ ) / Lifetime total discharge amount (constant) [kWh]
Lifetime charge / discharge loss CO ₂ = Power generation unit (constant) [g−CO ₂ / kWh] × Lifetime total charge / discharge loss [kWh]
Compared to the case where the deterioration of the storage battery is not taken into account, in the environmental impact calculation device and the environmental impact calculation method of the present embodiment, in the power generation facility equipped with the storage battery, as described above, the environmental load information and the battery use during battery manufacture Using battery deterioration information (battery characteristics information: cycle effect, temperature effect, discharge depth effect), and the battery usage status (battery status information) during the specified life cycle period of the power generation equipment It is possible to calculate the environmental load of the corresponding battery and calculate the power generation intensity using the result.

  That is, according to the environmental impact calculation apparatus and the environmental impact calculation method of the present embodiment, it is possible to present a more accurate power generation unit by a method that takes into account deterioration of the storage battery.

  Next, the environmental impact calculation apparatus and the environmental impact calculation method of the second embodiment will be described with reference to the drawings. In the following description, the same components as those in the first embodiment described above are denoted by the same reference numerals and description thereof is omitted.

FIG. 15 schematically shows a power generation facility that calculates a power generation basic unit [g-CO ₂ / kWh] in the present embodiment. In the present embodiment, the power generation intensity of a power generation facility including two storage batteries A and B and a power generation source such as a solar power generation device is calculated. The power generation source charges storage battery A and storage battery B and outputs generated power. The total power generation amount of the power generation facility is the sum of the power generation amount output from the power generation source, the discharge amount A of the storage battery A, and the discharge amount B of the storage battery B. At a certain point in time, for example, the power source unit of the power source is 40 [g-CO ₂ / kWh], the battery base unit of the storage battery A is 120 [g-CO ₂ / kWh], and the battery of the storage battery B The basic unit is 100 [g-CO ₂ / kWh], and the power generation basic unit of the power generation facility is 50 [g-CO ₂ / kWh].

FIG. 16 schematically shows a configuration example of the environmental impact calculation apparatus of the present embodiment. The environmental impact calculation apparatus according to the present embodiment is different from the first embodiment in that the power generation intensity [g-CO ₂ / kWh] is calculated for a power generation facility having a plurality of storage batteries A and storage batteries B.

  The environmental impact calculation apparatus of the present embodiment includes a calculation unit 1, a power generation information database 21, a battery characteristic database 31A, and a battery state database 41A.

In the battery characteristic database 31A, for each of the plurality of storage batteries A and storage batteries B, battery characteristics such as total battery discharge [kWh] in the life cycle, manufactured CO ₂ , charge / discharge CO ₂ and waste CO ₂ are stored. Stored.

  In the battery state database 41A, state information about each of the plurality of storage batteries A and storage batteries B is stored. The state information of the storage battery A and the storage battery B is the specified period discharge amount that is the discharge amount within the evaluation period, the aging period of the storage battery, the cycle number that is the number of times of charge and discharge, and the situation where the battery is placed. The average use temperature shown, the average discharge depth representing the depth of charge / discharge, and the like.

  The calculation unit 1 includes an evaluation range setting unit 10, a power generation information acquisition unit 20, a battery characteristic acquisition unit 30, a battery state acquisition unit 40, a battery basic unit calculation unit 50, a power generation basic unit calculation unit 60, A result output unit 70.

  In this embodiment, the battery characteristic acquisition unit 30 acquires the battery characteristics of the plurality of storage batteries A and storage batteries B, the battery state acquisition unit 40 acquires the battery states of the plurality of storage batteries A and storage batteries B, and the plurality of storage batteries A and The battery characteristics and battery state of the storage battery B are output to the battery basic unit calculation unit 50.

  The battery basic unit calculation unit 50 calculates the battery A basic unit of the storage battery A and the battery B basic unit of the storage battery B as follows.

Battery A basic unit (variable) = (storage battery A manufactured CO ₂ + storage battery A waste CO ₂ ) [g−CO ₂ ] / lifetime storage battery A total discharge amount (variable) [kWh] + charge / discharge of storage battery A during a specified period Loss CO ₂ (variable) / Total discharge amount of storage battery A during specified period [kWh]
Storage battery A charge / discharge loss during specified period CO ₂ (variable) = power generation unit (constant) [g−CO ₂ / kWh] × storage battery A charge / discharge loss during specified period (variable) [kWh]
Battery B basic unit (variable) = (storage battery B production CO ₂ + storage battery B disposal CO ₂ ) [g−CO ₂ ] / lifetime storage battery B total discharge amount (variable) [kWh] + charge / discharge of storage battery B during a specified period Loss CO ₂ (variable) [g−CO ₂ ] / Total discharge amount of storage battery B during specified period [kWh]
Storage battery B charge / discharge loss CO ₂ (variable) during specified period = Unit power generation (constant) x Storage battery B charge / discharge loss (variable) during specified period [kWh]
The battery basic unit calculation unit 50 outputs the calculated battery A basic unit of the storage battery A and battery B basic unit of the storage battery B to the power generation basic unit calculation unit 60.

  The power generation unit calculation unit 60 uses the battery A unit and battery B unit supplied from the battery unit calculation unit 50 to calculate the power generation unit of the power generation facility as follows.

Power generation basic unit = (Power generation basic unit (constant) x Power generation amount + Battery A basic unit x Discharge amount A + Battery B basic unit x Discharge amount B) / Total power generation amount during the specified period Power generation basic unit (constant) = ( Production CO ₂ + Power generation CO ₂ + Waste CO ₂ ) [g-CO ₂ ] / Lifetime total power generation amount [kWh]
Except for the configuration and operation described above, the environmental impact calculation apparatus and environmental impact calculation method of the present embodiment are the same as those of the first embodiment. In a power generation facility equipped with a plurality of storage batteries A and storage batteries B, the battery basic unit A and the battery basic unit B calculated using the battery characteristics (including performance degradation) of the storage battery A and the storage battery B and the battery state at the time of use. Can be used to calculate the power generation intensity.

  That is, according to the environmental impact calculation apparatus and the environmental impact calculation method of the present embodiment, it is possible to calculate a more accurate power generation unit considering the deterioration of the storage battery.

  Next, an environmental impact calculation apparatus and an environmental impact calculation method according to a third embodiment will be described with reference to the drawings.

  FIG. 17 schematically shows a configuration example of the environmental impact calculation apparatus of the present embodiment. The environmental impact calculation apparatus according to the present embodiment is the same as the environmental impact calculation apparatus according to the second embodiment except that the calculation unit 1 includes a battery selection unit 80.

  The battery selection unit 80 receives a plurality of battery A basic units and a battery B basic unit from the battery basic unit calculation unit 50, compares the received plurality of battery basic units, and selects a storage battery with a small battery basic unit, The selection result is output to the power generation unit calculation unit 60, and the power generation unit calculation unit 60 outputs the selection result to the result output unit 70.

  The result output unit 70 outputs the power generation unit received from the power generation unit calculation unit 60 and the storage battery selection result in the battery selection unit 80. When the result output unit 70 provides the storage battery selection result to, for example, an operation planning system that operates the power generation facility, it becomes possible to preferentially use a storage battery having a small battery basic unit in the power generation facility. It becomes possible to minimize and reduce the environmental load.

  That is, according to the environmental impact calculation apparatus and the environmental impact calculation method of the present embodiment, it is possible to calculate a more accurate power generation unit considering the deterioration of the storage battery, and to generate power using the calculated battery unit. It is possible to propose how to use the equipment.

  Next, an environmental impact calculation apparatus and an environmental impact calculation method according to a fourth embodiment will be described with reference to the drawings.

  FIG. 18 schematically shows a configuration example of the environmental impact calculation apparatus of the present embodiment. The environmental impact calculation apparatus of this embodiment further includes a cell / storage battery replacement history database 91A. The calculation unit 1 further includes a cell / storage battery replacement history database creation unit 90, a cell / storage battery history acquisition unit 91, and a power generation unit selection unit 92.

  The cell / storage battery exchange history database 91A stores battery characteristic information and battery state information of the secondary battery cell or storage battery after use. For example, if the secondary battery cell currently used in the power generation facility is the third unit, the first secondary battery cell and the second secondary battery cell used in the past are stored in the cell / storage battery replacement history database 91A. Battery characteristic information and battery state information with the next battery cell are stored.

  When the secondary battery cell or the storage battery is replaced in the power generation facility, for example, exchange information indicating that the secondary battery cell or the storage battery has been replaced is stored in the power generation information database 21.

The power generation information acquisition unit 20 acquires the average value of the power generation basic unit [g-CO ₂ / kWh] and the exchange information in the evaluation period set by the evaluation range setting unit 10 from the power generation information database 21, and Output to the storage battery replacement history database creation unit 90.

When the replacement information is information indicating no replacement, the cell / storage battery replacement history database creation unit 90 outputs an average value of the average value of the power generation source unit [g-CO ₂ / kWh] to the battery characteristic acquisition unit 30. . When the exchange information is information indicating that there is exchange, the battery characteristic information of the current secondary battery cell or storage battery is stored in the battery characteristic database 31, and the battery characteristic information and battery state information of the past secondary battery cell or storage battery are stored. Is moved to the cell / storage battery replacement history database 91A, and the battery characteristic database 31, the battery state database 41A, and the cell / storage battery replacement history database are automatically updated. The cell / storage battery exchange history database creation unit 90 updates the database, and then outputs the average value of the power generation source unit [g-CO ₂ / kWh] to the battery characteristic acquisition unit 30.

  The battery characteristic acquisition unit 30 acquires the current secondary battery cell or storage battery characteristic from the battery characteristic database 31, and the battery state acquisition unit 40 acquires the current secondary battery cell or storage battery state from the battery state database 41A. Then, the data is output to the cell / storage battery history acquisition unit 91.

  The cell / storage battery history acquisition unit 91 acquires the data when there is past battery characteristic information and battery state information of the secondary battery cell or storage battery, and receives the received secondary battery cell or battery of the current storage battery. Along with the characteristic information and the battery information, the data is output to the battery unit calculation unit 50.

  The battery basic unit calculation unit 50 calculates the battery basic unit considering the replacement history of the secondary battery cell or the storage battery and the battery basic unit not considering as follows.

Replaced battery basic unit = Σ (production CO ₂ + total lifetime charge / discharge loss CO ₂ + waste CO ₂ ) [g−CO ₂ ] / Σtotal lifetime of battery discharge [kWh]
Total charge / discharge loss for the lifetime of the battery CO ₂ = Power generation unit (constant) [g−CO ₂ / kWh] × Total charge / discharge loss for the lifetime of the battery [kWh]
Battery basic unit (variable) = (Manufacturing CO ₂ + Waste CO ₂ ) [g-CO ₂ ] / Lifetime total discharge amount (variable) [kWh] + Charge / discharge loss CO ₂ (variable) during specified period [g− CO ₂ ] / Total discharge amount during the specified period [kWh]
Charging / discharging loss during specified period CO ₂ (variable) = Power generation unit (constant) [g−CO ₂ / kWh] × Charging / discharging loss during specified period (variable) [kWh]
As described above, the battery basic unit calculation unit 50 calculates two basic units of the replaced battery basic unit and the battery basic unit, and outputs them to the power generation basic unit calculation unit 60.

  The power generation unit calculation unit 60 calculates two power generation units (a first power generation unit and a second power generation unit) as described below.

First power generation unit = (power generation unit (constant) [g-CO ₂ / kWh] × power generation amount [kWh] + power generation unit (variable) [g-CO ₂ / kWh] × discharge of storage battery Amount [kWh] + Σ (manufactured CO ₂ + total lifetime charge / discharge loss CO ₂ + waste CO ₂ ) [g−CO ₂ ]) / total power generation amount [kWh]
Second power generation unit = (power generation unit (constant) [g−CO ₂ / kWh] × power generation amount [kWh] + power generation unit [g−CO ₂ / kWh] × storage battery discharge amount [kWh] ]) / Total power generation [kWh]
The power generation unit calculation unit 60 outputs the calculated first power generation unit and second power generation unit to the power generation unit selection unit 92.

  The power generation unit selection unit 92 selects an arbitrary power generation unit selected by the user (evaluator) from the first power generation unit and the second power generation unit, and outputs the selected power generation unit as a result output unit 70. Output to.

  As described above, in the environmental impact calculation device and the environmental impact calculation method according to the present embodiment, the first power generation unit considering the replacement of the secondary battery cell or the storage battery and the secondary battery cell according to the needs of the evaluator. Alternatively, it is possible to create the second power generation unit that does not consider the replacement of the storage battery, and it is possible to more accurately calculate and present the power generation unit required by the user.

  That is, according to the environmental impact calculation apparatus and the environmental impact calculation method of the present embodiment, it is possible to calculate a more accurate power generation unit considering the deterioration of the storage battery, and the power generation unit according to the user's request. Can be presented.

  Next, an environmental impact calculation apparatus and an environmental impact calculation method according to a fifth embodiment will be described with reference to the drawings.

  FIG. 19 schematically shows a configuration example of the environmental impact calculation apparatus of the present embodiment. In the environmental impact calculation apparatus of this embodiment, the battery state database is omitted. The calculation unit 1 further includes a battery use condition acquisition unit 100, a cell / storage battery replacement number prediction unit 102, and a cell / storage battery state calculation unit 103. Further, the deterioration characteristics of the storage battery stored in the battery characteristic database 31 have a life criterion.

  In FIG. 20, the figure explaining an example of the operation | movement which calculates a cell and a storage battery state in the environmental influence calculation apparatus of this embodiment is shown. As shown in FIG. 20, in the present embodiment, a life judgment criterion is provided for each of the deterioration characteristics of the discharge capacity depending on the number of cycles, temperature, and depth of discharge, and it is determined that the life of the storage battery is reached when a predetermined discharge capacity is reached. I am going to do it.

  The battery usage condition acquisition unit 100 acquires the average annual cycle number, annual average temperature, annual average discharge depth, etc. expected during the life cycle of the power generation facility from an external operation planning system 101, etc. It outputs to the exchange number prediction unit 102.

  The cell / storage battery replacement number prediction unit 102 compares the information received from the battery use condition acquisition unit 100 with the battery characteristics, obtains the replacement time (replacement year) of the battery, and calculates the number of replacements in the life cycle of the power generation facility.

  That is, the cell / storage battery replacement number prediction unit 102 acquires the battery characteristics from the battery characteristics database 31, acquires the annual average cycle number, the annual average temperature, the annual average discharge depth from the operation planning system 101, the annual average cycle number, The replacement year is calculated using the annual average temperature and the deterioration characteristics of the annual average discharge depth. In addition, the replacement year of the storage battery is the lapse of time until the discharge capacity reaches a predetermined value after the start of use of the storage battery.

  Subsequently, the cell / storage battery replacement number prediction unit 102 calculates the number of replacements of the storage battery from the replacement year and the trial period of the power generation equipment, with the earliest (shortest) year among the calculated replacement years as the replacement year. Calculate the number of storage batteries used in the past.

  The cell / storage battery state calculation unit 103 calculates state information at the time of replacement of each secondary battery cell or each storage battery to be replaced, such as the first and second units as follows. Here, the state information is a total discharge amount and a total charge / discharge loss. The cell / storage battery state calculation unit 103 outputs the calculated cell / storage battery state information to the battery basic unit calculation unit 50.

Secondary battery cell total discharge = total discharge x secondary battery cell use year (replacement year) / power generation equipment use year
Total charge / discharge loss = Average discharge capacity reduction rate [%] of battery characteristics that determine the life x Total discharge amount of secondary battery cell [kWh]
Average discharge capacity reduction rate of battery characteristics that determined the lifetime = battery characteristics dx / secondary battery cell usage year (replacement year) (x = aging)
The battery basic unit calculation unit 50 calculates the battery basic unit using the cell / storage battery state information received from the cell / storage battery state calculation unit 103 as follows, and outputs the calculation result to the power generation basic unit calculation unit 60. .

Battery basic unit = Σ (Manufactured CO ₂ + Battery life total charge / discharge loss CO ₂ + Waste CO ₂ ) [g-CO ₂ ] / ΣBattery life total discharge [kWh]
Total charge / discharge loss for the lifetime of the battery CO ₂ = Power generation unit (constant) [g−CO ₂ / kWh] × Total charge / discharge loss for the lifetime of the battery [kWh]
Power generation basic unit (constant) = (Manufacturing CO ₂ + Power generation CO ₂ + Waste CO ₂ ) / Total power generation amount of power generation [kWh] over the lifetime of the power generation
The power generation unit calculation unit 60 calculates the power generation unit as follows using the battery unit received from the battery unit calculation unit 50 and outputs it to the result output unit 70.

Power intensity (predicted) = (power MinamotoGen units _{(constant) [g-CO 2 / kWh} ] × generation amount [kWh] + cell intensity _{(constant) [g-CO 2 / kWh} ] × Σ battery lifetime total Discharge amount [kWh]) / Total power generation amount [kWh]
As described above, in the environmental impact calculation device and the environmental impact calculation method of the present embodiment, it is possible to calculate the power generation intensity in the life cycle of the power generation facility by predicting the replacement of the secondary battery cell or the storage battery. Therefore, the user can predict the future influence of the power generation facility on the environment from the power generation intensity.

  That is, according to the environmental impact calculation apparatus and the environmental impact calculation method of the present embodiment, it is possible to calculate a more accurate power generation unit considering the deterioration of the storage battery, and the power generation unit according to the user's request. Can be presented.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  For example, in the above embodiments, the deterioration characteristics of the storage battery are stored in the battery characteristics database with respect to the cycle effect, the temperature effect, and the discharge depth effect. Any of these deterioration characteristics may be selectively used or may be used in combination.

  DESCRIPTION OF SYMBOLS 1 ... Operation part, 3 ... Display part, 5 ... Input part, 7 ... I / O interface, 10 ... Evaluation range setting part, 20 ... Power generation information acquisition part, 21 ... Power generation information database, 30 ... Battery characteristic acquisition part 31 ... Battery characteristic database, 31A ... Battery characteristic database, 40 ... Battery state acquisition unit, 41 ... Battery state database, 41A ... Battery state database, 50 ... Battery unit calculation unit, 60 ... Power generation unit calculation unit, 70 ... Result output unit 80 ... Battery selection unit 90 ... Cell / battery replacement history database creation unit 91 ... Cell / battery history acquisition unit 91A ... Cell / battery replacement history database 92 ... Power generation unit selection unit 100 ... Battery Use condition acquisition unit, 101 ... operation planning system, 102 ... cell / battery battery replacement number prediction unit, 103 ... cell / battery state calculation unit.

Claims (7)

An environmental impact calculation device for calculating a power generation intensity of a power generation facility including a power generation source and a storage battery charged by the power generation source,
An evaluation range setting unit for setting the evaluation range;
A power generation information acquisition unit that acquires an average value of the power generation basic unit from a power generation information database storing an average value of the power generation basic unit;
Battery characteristics for acquiring the battery characteristic information in the evaluation range from a battery characteristic database storing at least environmental load information at the time of manufacturing the storage battery and battery characteristic information regarding a change in discharge capacity or charge / discharge loss during use of the storage battery An acquisition unit;
A battery state acquisition unit that acquires the battery state information in the evaluation range from a battery state database that stores battery state information during use of the storage battery;
Based on information acquired by the power generation information acquisition unit, the battery characteristic acquisition unit, and the battery state acquisition unit, a battery unit calculation that calculates a battery unit considering charge / discharge loss of the storage battery And
An environmental impact calculation device comprising: a power generation unit calculation unit that calculates the power generation unit using the battery unit of the storage battery. The power generation facility includes a plurality of storage batteries,
The battery characteristic acquisition unit acquires the battery characteristic information in the evaluation range for the plurality of storage batteries from the battery characteristic database,
The battery state acquisition unit acquires the battery state information in the evaluation range for the plurality of storage batteries from the battery state database,
The battery basic unit calculation unit takes into account charge / discharge losses of the plurality of storage batteries based on information acquired by the power generation information acquisition unit, the battery characteristic acquisition unit, and the battery state acquisition unit. Calculate the battery unit,
The environmental impact calculation apparatus according to claim 1, wherein the power generation intensity calculation unit calculates the power generation intensity using the plurality of battery power consumption units.   The environment according to claim 2, further comprising: a battery selection unit that compares the battery basic units of the plurality of storage batteries calculated by the battery basic unit calculation unit, and determines the usage order of the storage batteries in ascending order of the plurality of battery basic units. Impact calculation device.   The battery basic unit calculation unit calculates the battery basic unit using the battery characteristic information and the battery state information of the replaced secondary battery cell or storage battery. The environmental impact calculation device described.   The environmental impact calculation apparatus according to claim 4, further comprising a selection unit that selects whether to calculate a power generation basic unit when considering replacement of a secondary battery cell or a storage battery or a power generation basic unit when not considering. An environmental impact calculation device that calculates a power generation intensity of a power generation facility including a power generation source and a storage battery that includes a plurality of secondary battery cells and is charged by the power generation source,
An evaluation range setting unit for setting the evaluation range;
A power generation information acquisition unit that acquires an average value of the power generation basic unit from a power generation information database storing an average value of the power generation basic unit;
The battery in the evaluation range from a battery information database storing at least environmental load information at the time of battery manufacture and battery characteristic information regarding a change in charge / discharge loss when the battery is used, including a life criterion for the secondary battery cell or the storage battery A battery characteristic acquisition unit for acquiring characteristic information;
A cell / storage battery replacement number prediction unit that calculates the number of replacements of the secondary battery cell or the storage battery using the battery characteristic information and a storage battery use plan in the life cycle of the power generation facility,
A cell / storage battery state calculation unit for calculating battery state information at the time of disposal for current and past storage batteries;
Based on the information acquired by the power generation information acquisition unit, the battery characteristic acquisition unit, and the cell / storage battery state information calculated by the cell / storage battery state calculation unit, the charge / discharge loss of the storage battery is considered. A battery unit calculation unit for calculating the battery unit
An environmental impact calculation device comprising: a power generation unit calculation unit that calculates the power generation unit using the battery unit of the storage battery. An environmental impact calculation method for calculating a power generation unit of a power generation facility including a power generation source and a storage battery charged by the power generation source, wherein the calculation unit includes:
Set the evaluation range,
Obtain the average value of the power generation intensity from the power generation information database storing the average value of the power generation intensity,
From the battery characteristic database storing at least the environmental load information at the time of production of the storage battery and the battery characteristic information regarding the change in charge / discharge loss at the time of use of the storage battery, the battery characteristic information in the evaluation range is acquired,
From the battery state database storing the battery state information at the time of use of the storage battery, obtain the battery state information in the evaluation range,
Using the average value of the power source basic unit, the battery characteristic information, and the battery state information, the battery basic unit considering the charge / discharge loss of the storage battery is calculated,
An environmental impact calculation method for calculating the power generation basic unit using the battery basic unit of the storage battery.

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