JP2022091900A - Amount-of-carbon dioxide emission estimation system, and amount-of-carbon dioxide emission estimation method - Google Patents

Abstract

To provide an amount-of-carbon dioxide emission estimation system and amount-of-carbon dioxide emission estimation method that allow for easily calculating a gross amount of carbon dioxide of a building with high accuracy in spite of a method of stacking an amount of carbon dioxide of a construction material to calculate the amount thereof.SOLUTION: In an amount-of-carbon dioxide estimation system 1 relating to a construction material to be used in a building, a computation processing unit 3 comprises: a cover rate setting unit 31 that sets a cover rate from an estimated use weight dominant in a gross weight of a building as to a direct calculation item selected as the item intended for directly calculating an amount of carbon dioxide; a direct amount-of-carbon dioxide calculation unit 32 that calculates an amount of carbon dioxide of the direct calculation item; an integration processing unit 33 that integrates the amount of carbon dioxide of the direct calculation item and the cover rate thereof to calculate a total amount and total cover rate; and a gross amount calculation unit 35 that corrects the total amount thereof on the basis of a ratio of the construction material not included in the total cover rate, and thereby calculates a gross amount of the construction material to be used in the building.SELECTED DRAWING: Figure 1

Description

The present invention relates to a carbon dioxide emission estimation system and a carbon dioxide emission estimation method for construction materials used in buildings.

As disclosed in Patent Documents 1 and 2, while consideration for the global environment is required, an increase in carbon dioxide emissions (CO2 emissions) and its influence have become a problem. When considering the construction of a building, carbon dioxide emissions are divided into Specs 1, 2, and 3 according to the GHG protocol, which is a global standard, and Specpe 3 is further classified into 15 categories. Of these, construction materials are classified into category 1 (emissions of purchased / acquired raw materials).

Then, in Patent Documents 1 and 2, the construction material used for the building is obtained by accumulating the carbon dioxide emission amount calculated based on the used quantity of the construction material and the basic unit of the construction material (CO2 emission amount in the unit quantity). It is stated that the total amount of carbon dioxide emissions can be calculated.

Japanese Unexamined Patent Publication No. 2004-265178 Japanese Unexamined Patent Publication No. 2002-245202

However, the method of calculating and accumulating CO2 emissions for each construction material is extremely time-consuming because the types and amounts of construction materials used in the building are enormous. On the other hand, in order to promote efforts to reduce CO2 emissions in each construction, it is necessary to grasp the carbon dioxide emissions of each construction material as accurately as possible.

Therefore, the present invention is a method for calculating carbon dioxide emissions of construction materials by accumulating them, but is a carbon dioxide emission estimation system capable of easily and accurately calculating the total carbon dioxide emissions of a building, and carbon dioxide dioxide. The purpose is to provide a method for estimating carbon emissions.

In order to achieve the above object, the carbon dioxide emission estimation system of the present invention is a carbon dioxide emission estimation system for construction materials used in buildings, and is selected as an item for directly calculating carbon dioxide emissions. For the directly calculated item, the coverage rate setting unit that sets the coverage rate from the estimated used weight in the total weight of the building and the used quantity of the directly calculated item are used as input data, and the basic unit of carbon dioxide emissions is multiplied. Therefore, the direct emission amount calculation unit that calculates each carbon dioxide emission amount and the carbon dioxide emission amount and the coverage rate of the direct calculation item having the input data are integrated to obtain the total emission amount and the total coverage rate. The total carbon dioxide emissions of the construction materials used in the building are corrected by correcting the total emissions based on the calculated integration processing unit and the ratio of the construction materials used in the building that are not included in the total coverage. It is characterized by having a total emission calculation unit for calculating.

Here, the configuration may include a coverage database that sets the coverage based on the type of the building. The coverage rate can be set based on actual data of buildings similar to the building.

Further, the invention of the carbon dioxide emission estimation method is a carbon dioxide emission estimation method for construction materials used in a building, and the carbon dioxide emissions are directly calculated from all the construction materials used in the building. Based on the step of selecting the item to be calculated as a direct calculation item and setting the coverage rate from the estimated used weight in the total weight of the building, and the basic unit of the used quantity and carbon dioxide emissions of the directly calculated item. A step of calculating the total emission amount by calculating and integrating each carbon dioxide emission amount, and a step of calculating the total coverage rate by integrating the coverage rate of the directly calculated item in which the used quantity is input. , A step of calculating the total carbon dioxide emissions of the construction materials used in the building by correcting the total emissions based on the proportion of construction materials used in the building that is not included in the total coverage. It is characterized by being prepared.

The carbon dioxide emission estimation system of the present invention configured in this way covers the directly calculated item selected as the item for directly calculating the carbon dioxide emission from the estimated weight used in the total weight of the building. It has a coverage setting unit to set. In addition, the total emission calculation unit calculates the total carbon dioxide emissions of construction materials used in buildings by correcting the total emissions based on the ratio of construction materials used in buildings that are not included in the total coverage rate. do.

In this way, although it is a method of accumulating and calculating the carbon dioxide emissions of construction materials, by using the coverage ratio, it becomes possible to easily and accurately calculate the total carbon dioxide emissions of the building.

Also, if you have a coverage database that sets the coverage based on the type of building, you can easily set the coverage by simply entering the type of building that is similar to the building you are trying to build. Can be done.

The invention of the carbon dioxide emission estimation method is also a method of accumulating and calculating the carbon dioxide emissions of construction materials, but by using the coverage ratio, the total carbon dioxide emissions of the building can be easily accurate. It can be calculated well.

It is a block diagram explaining the structure of the carbon dioxide emission amount estimation system of this embodiment. It is a flowchart explaining the process flow of the carbon dioxide emission amount estimation method of this embodiment. It is explanatory drawing which exemplifies the ratio of carbon dioxide emission of each construction material used for a building. It is explanatory drawing which showed the item necessary for the calculation of the carbon dioxide emission amount of a construction material. It is explanatory drawing which illustrated the calculation sheet of the carbon dioxide emission amount estimation system of this embodiment. It is explanatory drawing which illustrated the result calculated by the carbon dioxide emission amount estimation system of this embodiment. It is explanatory drawing which showed the calculated carbon dioxide emission amount for each construction material in a pie chart and a list.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram illustrating a configuration of a carbon dioxide emission estimation system according to the present embodiment. Further, FIG. 2 is a flowchart illustrating a processing flow of the carbon dioxide emission amount estimation method of the present embodiment.

The CO2 estimation system 1, which is the carbon dioxide emission estimation system of the present embodiment, calculates the carbon dioxide emissions of the construction materials used in the building. That is, for a building whose total weight cannot be directly measured by a scale or the like, the carbon dioxide emissions based on all the construction materials constituting the building are calculated as the total carbon dioxide emissions of the building.

Construction materials are categorized into Category 1 (purchased / acquired raw material emissions) by the GHG protocol, which is an international standard for calculating and reporting greenhouse gas (GHG) emissions. Has been done.

As shown in FIG. 1, the CO2 estimation system 1 of the present embodiment includes an arithmetic processing unit 3 that performs arithmetic processing based on input information from an input device 2 or the like, and the arithmetic processing unit 3 includes various databases (21, 22), a storage unit 4, a display device 5 such as a display, and the like are connected.

The input device 2 corresponds to a keyboard, a mouse, a touch pad, a touch panel, a microphone for voice input, and the like. Various databases (21, 22) for acquiring data required for arithmetic processing will be described later.

Further, the storage unit 4 is a storage medium for recording data generated during processing in the arithmetic processing unit 3 and data necessary for arithmetic processing, and corresponds to a hard disk, a flash memory, a magnetic disk, an optical disk, or the like. Further, the cloud server can also be used as the storage unit 4.

The arithmetic processing unit 3 of the CO2 estimation system 1 of the present embodiment includes a coverage rate setting unit 31, a direct emission amount calculation unit 32, an integration processing unit 33, a non-coverage rate calculation unit 34, and a total emission amount calculation unit. It is equipped with 35.

In explaining the coverage ratio setting unit 31, first, the ratio of carbon dioxide emissions of each construction material used in the building illustrated in FIG. 3 will be described. As shown in FIG. 3, when constructing a new building, many construction materials are used.

Listed: concrete, reinforced, glass, deck plate, steel frame, aluminum sash, raised floor, metal sandwich panel, ALC panel, SD (heavy steel door), LGS (lightweight steel frame), rock wool, system ceiling, gypsum board, Construction materials such as tiles, crushed stones and stones are used to build buildings.

Then, for these construction materials, a basic unit that is a carbon dioxide emission amount (CO2 emission amount) in a unit quantity can be set. The basic unit can be calculated independently, or it can be obtained and used by a third party. As for the basic unit, the basic unit for each construction material converted into a unit according to the unit of the used quantity of the construction material is stored in the storage unit 4.

Then, by multiplying the used quantity of each construction material by the corresponding basic unit, the carbon dioxide emission amount (t-CO2) of each construction material of the newly constructed building can be calculated. As can be seen from FIG. 3, many construction materials are used to construct a building, but the ratio of the total CO2 emissions to the total CO2 emissions exceeds 50%, for example, in the top three items. Here, it can be seen that the CO2 emissions of concrete (excluding piles), reinforcing bars (pile), and glass are high.

In short, even if you do not stack all the items of construction materials used for the building, select the items of construction materials that account for a large proportion of the total, and directly calculate the carbon dioxide emissions only for the selected directly calculated items. Even if it is calculated, it can be said that the estimation accuracy above a certain level can be secured.

Therefore, in the CO2 estimation system 1 of the present embodiment, the ratio of the weight used of the directly calculated item to the total weight of the building is set as the coverage rate. That is, the coverage rate setting unit 31 sets the coverage rate based on this weight.

As mentioned above, the total weight of the building cannot be directly measured by a scale or the like, and the building does not exist at the time of estimation before the construction of the building. Therefore, the total weight of the building is an estimated value, and the estimated weight of the directly calculated item is also the estimated weight derived from a similar building, etc., when the coverage rate is set.

In the direct calculation item database 21 connected to the CO2 estimation system 1 of the present embodiment, when the total weight of the construction materials constituting the building is totaled, for example, 90% or more by weight ratio can be covered and used. Items whose quantity is easy to calculate are selected and stored as direct calculation items.

On the other hand, in the coverage database 22, the coverage of directly calculated items is stored for each type of similar buildings. Even if it is a construction material that is often used for building construction, the weight coverage rate of the construction material (directly calculated item) differs depending on the type of building such as steel structure (S structure), reinforced concrete structure (RC structure), and wooden structure. .. Even if the structure of S structure or RC structure is the same, the total floor area (10000m ² or more, 10000-5000m ² , less than 5000m ² etc.) and the number of floors (20 stories or more, 20-10 stories, etc.) The weight coverage of construction materials varies depending on the scale of 9-4 stories, less than 3 stories).

Therefore, in the coverage rate database 22, the coverage rate based on the weight of the directly calculated item is set and stored for each type that can be classified according to the structure and scale of the building. This coverage rate can be used by calculating the average value, etc., when multiple actual data of the same type of building are accumulated. Further, if the number and types of buildings stored in the coverage rate database 22 increase, the reliability of the coverage rate can be improved and the types of buildings can be subdivided.

The direct emission amount calculation unit 32 calculates each carbon dioxide emission amount by using the used quantity of the directly calculated item as input data and multiplying by the basic unit of the carbon dioxide emission amount. The used quantity of the directly calculated item can be input by the input device 2, or if the used quantity calculated at the time of estimation is stored in the storage unit 4, it can be taken out from there and used.

The integration processing unit 33 integrates the carbon dioxide emission amount and the coverage rate of the directly calculated item having the input data of the used quantity, and calculates the total emission amount and the total coverage rate. In short, the directly calculated items used for the standard building of the type to be estimated are taken out from the direct calculation item database 21, but the construction materials and the quantity used are not calculated in the building to be estimated. For construction materials, carbon dioxide emissions cannot be calculated directly.

Therefore, the integration target of the integration processing unit 33 is limited to the directly calculated items having the input data of the used quantity. Then, for each directly calculated item to be integrated, the carbon dioxide emission amount for each item is calculated by multiplying the used quantity by the basic unit, and the total emission amount is calculated by integrating them.

Further, the total coverage rate is calculated by integrating the coverage rate extracted from the coverage rate database 22 for the directly calculated items to be integrated. The total coverage ratio indicates the ratio of the weight of the construction materials used for the building, which can be directly calculated and accumulated for carbon dioxide emissions. If this total coverage rate is, for example, 90% or more, it can be said that a highly reliable stacking formula can be calculated.

The non-coverage rate calculation unit 34 calculates the ratio of construction materials used for buildings that are not included in the total coverage rate as the non-coverage rate. In short, in the CO2 estimation system 1 of the present embodiment, the carbon dioxide emissions are not calculated for all the construction materials used in the building, so that the carbon dioxide emissions of the construction materials for which the carbon dioxide emissions were not calculated are calculated. The weight ratio is calculated as the non-coverage ratio.

In the total emission calculation unit 35, the total emission calculated from the directly calculated item for which the coverage rate is set and the used quantity is input is corrected by the non-coverage rate to supplement the insufficient carbon dioxide emission amount. conduct. Specifically, by setting the reciprocal of the total coverage rate (100 / coverage rate) as a correction coefficient based on the non-coverage rate and multiplying the correction coefficient by the total emission amount, the total carbon dioxide of the construction materials used for the building Calculated as emissions.

Next, the processing flow of the carbon dioxide emission estimation method of the present embodiment will be described with reference to FIG.
First, in step S1, the directly calculated items registered in the directly calculated item database 21 are taken in, and the basic unit used as the calculation standard of the carbon dioxide emission amount for each construction material stored in the storage unit 4 is taken in.

Here, FIGS. 4 to 6 are explanatory views showing items necessary for calculating the carbon dioxide emission amount of the construction material in the form of a calculation sheet. In the following, for convenience, the processing will be explained by dividing it into steps, but when the necessary items are entered in the calculation sheet, the total carbon dioxide emissions are automatically calculated, which is the same as in the general calculation sheet. be.

The number of directly calculated items fetched from the directly calculated item database 21 is preferably less than the number of all construction materials used in the building, and the number is preferably a number that reduces the burden of input. Here, the items related to pile construction are set as "essential items (non-standard)", and the other items are set as "essential items (standard)".

For example, "required items (standard)" are classified into concrete (excluding piles), reinforcing bars (excluding piles), steel frames, PCa members (precast members), deck plates, crushed stones, ALC panels, and ECP (extruded). Molded cement boards), rock wool, metal sandwich panels, etc.

On the other hand, concrete (pile), reinforcing bar (pile), etc. are classified as "essential items (non-standard)". Since the length of pile construction varies depending on the construction site and the quantity varies greatly from property to property, when comparing carbon dioxide emissions between properties, it is now possible to compare pile construction as an exclusion.

Here, for example, even if the same item called "glass" such as single plate glass, double glazing, and tempered glass, the CO2 emission amount may change greatly depending on the specifications. In such a case, by making the specifications of the item selectable and using the basic unit of the selected specifications, more accurate estimation can be performed.

Subsequently, in step S2, the coverage rate set for each type of building is fetched from the coverage rate database 22. FIG. 4 shows a state in which the coverage ratio by weight of S structure (steel frame structure) and RC structure (reinforced concrete structure) is taken in by using the structure of the building as a type (see column M7).

Then, when the type of the building to be estimated for calculating the carbon dioxide emission is input to the M1 column by operating the input device 2, the coverage rate according to the type (S structure in this example) is covered. It is set by the rate setting unit 31 and incorporated into the M6 column.

At this stage, the calculation sheet includes the classification (frame, finish, etc.) and name (M2 column) of the selected items, the numerical value of the basic unit (kg-CO ₂ ) for each construction material (M3 column), and the coverage rate (M6). ) Is displayed.

In step S3, the quantity used in the building to be estimated is input for the directly calculated items listed in the calculation sheet. The numerical value input in the M4 column of FIG. 4 can be input by operating the input device 2. Further, if the used quantity is calculated at the time of estimation and the estimated data is stored in the storage unit 4, it can be fetched from there.

In step S4, the direct emission calculation unit 32 calculates the carbon dioxide emission amount (t-CO ₂ ) of each directly calculated item by multiplying the input quantity of the directly calculated item by the basic unit. It is displayed as shown in column M5 of FIG.

FIG. 5 illustrates a state in which the used quantity of the directly calculated item is input to the calculation sheet of the CO2 estimation system 1. As shown in this figure, it is not necessary to enter the used quantity for all directly calculated items, and there may be blanks.

If the coverage rate is set for the directly calculated item for which the used quantity is not entered, the coverage rate can be redistributed to redistribute the coverage rate. In addition, even if the items related to pile construction of "essential items (non-standard)" are excluded, the coverage rate can be recalculated and reset.

In step S5, the integration processing unit 33 integrates the carbon dioxide emissions of the directly calculated item for which the quantity used has been input, and calculates the total emissions (see column M11 in FIG. 6). In addition, the total coverage rate is calculated by integrating the coverage rates of the directly calculated items for which the used quantity is also input (see column M12 in FIG. 6). The weight ratio of the above-mentioned directly calculated items is preferably 90% or more, and the total coverage ratio shown in the M12 column of FIG. 6 is "96.3%", which is a value of 90% or more.

Once the total coverage rate is calculated, the non-coverage rate can be calculated by subtracting the total coverage rate from 100% by the non-coverage rate calculation unit 34 (step S6). Although the value of the non-coverage rate itself is not displayed on the calculation sheet, the correction coefficient based on the non-coverage rate is displayed as shown in the M13 column of FIG.

This correction coefficient is the reciprocal of the total coverage rate (M12 column) (100 / total coverage rate), and is included in the total coverage rate by correcting the total emission amount (M11 column) with the correction coefficient (M13 column). It will be possible to add carbon dioxide emissions of construction materials used in non-building buildings.

In short, in step S7, the total emission amount calculation unit 35 calculates the total carbon dioxide emission amount (total CO2 emission amount) of the entire building by multiplying the total emission amount (M11 column) by the correction coefficient (M13 column). , Displayed in the M14 column.

As shown in the M15 column, the total CO2 emissions can be calculated excluding non-standard items for direct calculation and selected items. Further, as shown in the M16 column, it can be converted and displayed in terms of the amount of emissions per unit area of the building (kg-CO ₂ / m ² ).

FIG. 7 is an explanatory diagram showing the calculated carbon dioxide emissions for each construction material in a pie chart and a list. If you look at this pie chart, the carbon dioxide emissions are displayed in descending order, so you can see at a glance which construction materials are effective for CO2 reduction measures.

Next, the operation of the carbon dioxide emission estimation system and the carbon dioxide emission estimation method of the present embodiment will be described.
The CO2 estimation system 1 of the present embodiment configured in this way sets the coverage rate from the estimated weight used in the total weight of the building for the directly calculated item selected as the item for directly calculating the carbon dioxide emission amount. The coverage rate setting unit 31 is provided.

In addition, the ratio of construction materials used for buildings that are not included in the total coverage ratio, such as those that are not included in the direct calculation items, can be calculated as the non-coverage ratio by the non-coverage ratio calculation unit 34. Then, the total emission amount calculation unit 35 calculates the total carbon dioxide emission amount of the construction material used for the building by correcting the total emission amount of the directly calculated items based on the non-coverage rate.

In this way, although it is a method of accumulating and calculating the carbon dioxide emissions of construction materials, it is possible to easily and accurately calculate the total carbon dioxide emissions of a building by using the coverage ratio. That is, for a building whose total weight cannot be directly measured by a scale or the like, the carbon dioxide emission amount based on all the construction materials constituting the building can be calculated as the total carbon dioxide emission amount of the building.

If the total coverage rate is, for example, 90% or more, it can be said that the stacking formula can be calculated with high accuracy. Even if you enter only items that show the quantity used, if you enter major items such as concrete, reinforcing bars, and steel frames, you will be able to cover more than 80% of the weight. It is possible to improve the prediction accuracy of carbon dioxide emissions.

Further, if the coverage rate database 22 for setting the coverage rate based on the building type is provided, the coverage rate can be easily set by simply inputting the type of the building to be constructed. Furthermore, if a large amount of actual data of a building similar to the building to be constructed is accumulated, more accurate estimation can be performed.

In addition, if the carbon dioxide emissions of each construction material can be grasped by displaying the calculation sheet (see FIG. 5) output to the display device 5 or the like, or by using a pie chart or a list (see FIG. 7), efficient carbon dioxide emission can be achieved. You will be able to consider and implement plans to reduce carbon emissions.

The carbon dioxide emission estimation method of the present embodiment is also a method of accumulating and calculating the carbon dioxide emissions of construction materials, but by using the coverage ratio, the total carbon dioxide emissions of the building can be easily achieved. The amount can be calculated accurately.

Although the embodiment of the present invention has been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and design changes to the extent that the gist of the present invention is not deviated are made in the present invention. Included in the invention.

For example, in the above-described embodiment, the case where one type of building is selected and the coverage rate is set has been described, but the present invention is not limited to this. For example, in the case of a complex building with a mixture of uses and structures, the results calculated by the coverage ratio set for each type are added up according to the composite ratio, and carbon dioxide emissions of the entire complex building are emitted. The amount can be estimated.

1: CO2 estimation system (carbon dioxide emission estimation system)
22: Coverage database 31: Coverage setting unit 32: Direct emission calculation unit 33: Integration processing unit 35: Total emission calculation unit

Claims (5)

A carbon dioxide emission estimation system for construction materials used in buildings.
For the directly calculated item selected as the item for directly calculating the carbon dioxide emissions, the coverage rate setting unit that sets the coverage rate from the estimated used weight in the total weight of the building, and the coverage rate setting unit.
With the direct emission calculation unit that calculates each carbon dioxide emission by multiplying the basic unit of carbon dioxide emission by using the usage quantity of the directly calculated item as input data.
An integration processing unit that calculates the total emission amount and the total coverage rate by integrating the carbon dioxide emission amount and the coverage rate of the directly calculated item having the input data.
Total emission calculation to calculate the total carbon dioxide emissions of construction materials used in the building by correcting the total emissions based on the ratio of construction materials used in the building that is not included in the total coverage. A carbon dioxide emission estimation system characterized by having a unit. The carbon dioxide emission estimation system according to claim 1, further comprising a coverage database for setting the coverage based on the type of the building. When the coverage rate fetched from the coverage rate database includes those related to pile construction, the coverage rate setting unit is characterized in that it is possible to set the coverage rate excluding the pile construction. The carbon dioxide emission estimation system according to claim 2. A method for estimating carbon dioxide emissions related to construction materials used in buildings.
From all the construction materials used in the building, the item that directly calculates the carbon dioxide emissions is selected as the direct calculation item, and the coverage rate is set from the estimated weight used in the total weight of the building.
A step to calculate the total emission amount by calculating and integrating each carbon dioxide emission amount based on the used quantity of the directly calculated item and the basic unit of the carbon dioxide emission amount.
A step of calculating the total coverage rate by integrating the coverage rate of the directly calculated item for which the used quantity is input, and
It is provided with a step of calculating the total carbon dioxide emission amount of the construction material used for the building by correcting the total emission amount based on the ratio of the construction material used for the building not included in the total coverage ratio. A method for estimating carbon dioxide emissions, which is characterized by the fact that. The method for estimating carbon dioxide emissions according to claim 4, wherein the coverage rate is set based on actual data of a building similar to the building.

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