Carbon dioxide management system and carbon dioxide management method

Abstract

This carbon dioxide management system comprises: a conveyance facility for conveying, in a construction site, exhaust gas discharged from a construction machine used in the construction site; a separation facility in the construction site for separating carbon dioxide from the exhaust gas conveyed by the conveyance facility; and a storage facility in the construction site for storing the carbon dioxide separated by the separation facility at the construction site so that the carbon dioxide can be used.

Description

Carbon dioxide management system and carbon dioxide management method

[0001] The present disclosure relates to a carbon dioxide management system and a carbon dioxide management method that support the recovery of carbon dioxide emitted during construction work.

[0002] To curb global warming and climate change, there is a need to reduce carbon dioxide (CO2) emissions in construction work as well. Accordingly, technology for calculating this carbon dioxide emissions has been studied (see Patent Document 1). The technology described in this document calculates the CO2 emissions of each major material by multiplying the quantity of each major material by the CO2 emissions intensity of that material. Furthermore, the CO2 emissions of each major construction machine are calculated by multiplying the fuel consumption amount of each major construction machine by the CO2 emissions intensity of the fuel.

[0003] Meanwhile, a carbon dioxide capture system that captures carbon dioxide contained in engine exhaust gas has also been studied (see Patent Document 2). The carbon dioxide capture system described in this document includes an absorption unit, an exhaust gas supply path, and a pressure booster. The system separates and captures CO2 from the engine exhaust gas.

[0004] Furthermore, a carbon dioxide fixation technique for fixating CO2 in cement hydrate has also been studied (see Patent Document 3). In the technique described in this document, cement hydrate and water are placed in a container. Then, carbon dioxide is blown into the container while the mixture of cement hydrate and water is stirred.

[0005] JP 2007-018061 A JP 2023-68025 A JP 2023-147117 A

[0006] However, it is difficult to capture carbon dioxide emitted from construction machinery during construction, making it difficult to utilize carbon dioxide efficiently.

[0007] A carbon dioxide management system for solving the above problems includes a separation facility that separates carbon dioxide from exhaust gas emitted by construction machinery used at construction sites, and a storage facility that stores the carbon dioxide separated by the separation facility so that it can be used.

[0008] The present disclosure makes it possible to efficiently capture carbon dioxide emitted during construction work.

[0009] FIG. 1 is an explanatory diagram of a system according to an embodiment. FIG. 2 is an explanatory diagram of a hardware configuration according to an embodiment. FIG. 3 is an explanatory diagram of carbon dioxide recovery according to an embodiment. FIG. 4 is an explanatory diagram of a support server according to an embodiment. FIG. 5 is an explanatory diagram of a processing procedure according to an embodiment. FIG. 6 is an explanatory diagram of carbon dioxide recovery according to another example. FIG. 7 is an explanatory diagram of carbon dioxide recovery according to another example.

[0010] An embodiment of a carbon dioxide management system and a carbon dioxide management method will be described below with reference to Figures 1 to 6. This embodiment will be described as a carbon dioxide management system and a carbon dioxide management method used when recovering carbon dioxide emitted from construction machinery at a construction site such as a building. This reduces carbon dioxide emitted into the atmosphere from the construction machinery.

[0011] As shown in FIG. 1 , the carbon dioxide management system A1 of this embodiment recovers carbon dioxide contained in exhaust gas emitted from a construction machine M1 used at a construction site 100. The construction machine M1 may be, for example, a backhoe (hydraulic excavator). For this purpose, a recovery line 101 is provided in the external premises surrounding the construction site 100. Furthermore, the exhaust gas emitted from the construction machine M1 is recovered by a recovery pipe 105 connected to the exhaust gas outlet of the construction machine M1. For this purpose, the recovery line 101 is provided with connection ports for the recovery pipe 105 at predetermined intervals. Here, the recovery line 101 and the recovery pipe 105 function as a transport facility. Then, in a recovery device 10 provided at the construction site 100, the carbon dioxide contained in the exhaust gas is separated from the exhaust gas. This recovery device 10 is connected to a support server 20 and a management device 30 via a network.

[0012] 2, the hardware configuration of the information processing device H10 that realizes the collection device 10, the support server 20, and the management device 30 will be described. The information processing device H10 includes a communication device H11, an input device H12, a display device H13, a storage device H14, and a processor H15. Note that this hardware configuration is an example, and it can also be realized by other hardware.

[0013] The communication device H11 is an interface that establishes a communication path with another device and executes data transmission and reception, and is, for example, a network interface or a wireless interface.

[0014] The input device H12 is a device that accepts input of various information, such as a mouse, a keyboard, etc. The display device H13 is a display that displays various information, etc. Note that a touch panel display may be used as the input device H12 and the display device H13.

[0015] The storage device H14 is a storage device that stores data and various programs for executing various functions of the collection device 10, the support server 20, and the management device 30. Examples of the storage device H14 include a read-only memory (ROM), a random access memory (RAM), a hard disk, etc.

[0016] The processor H15 uses the programs and data stored in the storage device H14 to control each process in the collection device 10, the support server 20, and the management device 30. Examples of the processor H15 include a central processing unit (CPU) and a microprocessor unit (MPU). The processor H15 loads programs stored in ROM or the like into RAM and executes various processes for each process.

[0017] The processor H15 is not limited to a processor that performs all of its processing using software. For example, the processor H15 may include a dedicated hardware circuit (e.g., an application-specific integrated circuit (ASIC)) that performs hardware processing for at least some of the processing it performs. That is, the processor H15 may be configured as follows:

[0018] Circuitry includes: [1] one or more processors that operate according to a computer program (software); [2] one or more dedicated hardware circuits that perform at least some of various processes; and [3] a combination thereof. A processor includes a CPU and memory such as RAM and ROM, and the memory stores program code or instructions that cause the CPU to perform processes. Memory, or computer-readable media, includes any available medium that can be accessed by a general-purpose or dedicated computer.

[0019] (System Configuration) Next, each function of the carbon dioxide management system A1 will be described. As shown in Figure 3, a recovery pipe 105 is connected to an exhaust pipe M12 (tail pipe) of an engine M11 of a construction machine M1 via a detachable attachment 121. This recovery pipe 105 is provided with a blower 122, a flow meter 123, and a check valve 124. The blower 122 sends exhaust gas from the engine M11 to the recovery pipe 105. The flow meter 123 measures the flow rate of the exhaust gas. The check valve 124 prevents backflow of exhaust gas.

[0020] The recovery pipe 105 is connected to the construction machine M1, and therefore uses a relatively soft and stretchable member (for example, a flexible hose, etc.). This recovery pipe 105 is connected to the recovery device 10 via a recovery line 101, and supplies the exhaust gas to the recovery device 10. A relatively rigid member (a metal pipe, a polyvinyl chloride pipe, etc.) is used as the recovery line 101.

[0021] The recovery system 10 includes an exhaust gas storage device 111, a separation device 112, and a CO2 storage device 113. The exhaust gas storage device 111 is a storage facility (for example, a container such as a cylinder or a tank) that stores the exhaust gas recovered via the recovery line 101. The exhaust gas storage device 111 is provided with a measuring instrument D11. The measuring instrument D11 measures the volume of the exhaust gas before separation and the concentration of carbon dioxide in the exhaust gas.

[0022] The separation device 112 is a separation facility that separates carbon dioxide from exhaust gas. Here, membrane separation is used as a method for separating carbon dioxide. Membrane separation is a method for separating carbon dioxide from other gases by utilizing the difference in permeability of the membranes. Examples of membranes that can be used include polyamide membranes, polysulfone membranes, and polytetrafluoroethylene membranes. The separation speed varies depending on the type of membrane, and the higher the permeability of the membrane to carbon dioxide, the faster the separation speed. Furthermore, substances with small molecular sizes and highly polarizable substances tend to pass through membranes easily. Furthermore, the cost also varies depending on the type of membrane. Furthermore, by repeating the membrane separation process, the efficiency decreases, but the concentration can be increased.

[0023] The CO2 storage device 113 is a storage facility (for example, a container such as a cylinder or a tank) that stores the separated carbon dioxide. A measuring instrument D12 is provided in the CO2 storage device 113. The measuring instrument D12 measures the volume and concentration of carbon dioxide in the exhaust gas after separation.

[0024] The carbon dioxide stored in the CO2 storage device 113 is utilized in the processing facility device 150. As the processing facility device 150, for example, a device that mixes carbon dioxide into concrete is used.

[0025] 4, the support server 20 is a computer system that executes support processing for utilizing the captured carbon dioxide. The support server 20 includes a control unit 21, a construction information storage unit 22, a work plan storage unit 23, and a recovery information storage unit 24.

[0026] The control unit 21 performs the processes described below (processes including an acquisition stage, an analysis stage, an instruction stage, etc.) By executing a processing program for this purpose, the control unit 21 functions as an acquisition unit 211, an analysis unit 212, an instruction unit 213, etc.

[0027] The acquisition unit 211 acquires various information from the flow meter 123 and the recovery device 10. The acquisition unit 211 periodically acquires measurement values ​​from the flow meter 123 and the measuring instruments D11 and D12, and records them in the recovery information storage unit 24.

[0028] The analysis unit 212 determines the installation location of the recovery pipe 105 in accordance with the work plan. Furthermore, the analysis unit 212 determines the separation method based on the work content using carbon dioxide (purpose of CO2 utilization). This analysis unit 212 holds CO2 condition information for determining the required carbon dioxide concentration grade and the required amount of carbon dioxide according to the unit amount of the work content, depending on the identified work content. The instruction unit 213 instructs the management device 30 on the determined installation location and separation method.

[0029] The construction information storage unit 22 stores construction management information for structures constructed at construction sites. This construction management information is created using BIM (Building Information Modeling). The construction management information includes three-dimensional model information (element models, placement information, and attribute information) for project information.

[0030] The project information includes information about the project ID, the name of the work site, the location (longitude and latitude) of the work site, etc. The element model is information about the three-dimensional shape (three-dimensional model) of each element that makes up the work site. In this embodiment, element objects related to the materials and equipment used in the construction and the work area are used.

[0031] The placement information includes information about the placement of the 3D model (coordinates in the 3D virtual space). The attribute information includes the object ID of this element model. The object ID is information about an identifier for identifying the 3D shape (3D model) of each element. The architectural element object also records property information about specifications (type of equipment and materials, standards, dimensions, area, volume, materials, price, etc.), process, and construction time.

[0032] The work plan storage unit 23 stores work plan information for construction work. This work plan information is recorded when a work plan is formulated to carry out construction management for the entire site. The work plan information includes information on the work overview, schedule, site organization, safety measures, quality control, environmental measures, and construction machinery.

[0033] The work summary information includes information on the name of the work, construction period, work content, construction location, construction costs, etc. The schedule information includes information on the construction order and construction period of each work type, etc. From this schedule information, construction work that uses CO2 can be identified.

[0034] The site organization information includes information on the construction manager, site supervisor, worker layout diagram, etc. The safety measure information includes information on work-related obstacles and countermeasures, the implementation details of safety training, etc.

[0035] Quality control information includes information on inspection items and inspection methods, etc. Environmental measures information includes information on environmental impact measures such as noise and vibration, etc. Construction machinery information includes information on construction machinery specifications, operator qualifications, layout drawings, etc.

[0036] Specification information is information about the model and performance of the construction machine. Based on this specification information, exhaust gas and the amount of emissions per unit time can be identified. Driver qualification information is information about the qualifications required to operate the construction machine. Layout plan information is information that indicates where the construction machine is located at the construction site. This layout plan information is determined according to the elements of the construction object recorded in the construction information storage unit 22.

[0037] The recovery information storage unit 24 records recovery management information about carbon dioxide recovered at the construction site. This recovery management information is recorded when measurements are taken regularly during the recovery of exhaust gas containing carbon dioxide. The recovery management information includes information regarding the recovery date and time, flow rate, concentration before separation, and concentration after separation. Recovery date and time information is the date and time when the exhaust gas was recovered. Flow rate information is the flow rate of the recovered exhaust gas. The amount recovered can be calculated by multiplying this flow rate by the measurement time. Pre-separation concentration information is the carbon dioxide concentration and volume in the air (in the exhaust gas) measured by measuring instrument D11 of the recovery device 10 before carbon dioxide is separated from the exhaust gas. Post-separation concentration information is the carbon dioxide concentration and volume in the air measured by measuring instrument D12 of the recovery device 10 after carbon dioxide is separated from the exhaust gas.

[0038] The management device 30 is a computer terminal used by a person in charge of managing the construction site.

[0039] [Carbon Dioxide Management Process] The carbon dioxide management process will be described with reference to FIGS.

[0040] (Layout Process) The layout process will be described with reference to Fig. 5. First, a collection line is laid out in the outer ditch (step S11). Here, a collection line 101 is provided around the construction site 100 in the external structure surrounding the construction site 100.

[0041] Next, the control unit 21 of the support server 20 acquires the construction schedule (step S12). Specifically, the acquisition unit 211 of the control unit 21 acquires construction management information, in which the construction time is included in a predetermined planning period, from the construction information storage unit 22. Next, the acquisition unit 211 uses the construction management information to identify the location where construction will be performed and the construction content within the construction site 100.

[0042] Next, the control unit 21 of the support server 20 identifies the work content of the construction machinery (step S13). Specifically, the acquisition unit 211 of the control unit 21 acquires work plan information for the planned period from the work plan storage unit 23. The acquisition unit 211 then uses the work plan information to identify the construction machinery to be used during the planned period. Furthermore, the acquisition unit 211 acquires specification information (displacement) of the construction machinery to be used during the planned period.

[0043] Next, the control unit 21 of the support server 20 determines the location and operation range of the construction machine according to the work content (step S14). Specifically, the analysis unit 212 of the control unit 21 determines the installation location and movement range for each construction machine based on the construction location and construction content in the construction management information. For example, it determines the location where the construction machine can be located and work according to the work area and location of the construction target.

[0044] Next, the control unit 21 of the support server 20 sets the specifications of the recovery pipe according to the work content (step S15). Specifically, the analysis unit 212 of the control unit 21 predicts the operation time of each construction machine in the work plan information according to the construction content in the construction management information. For example, the required operation time is calculated by dividing the work target volume by the specifications (performance) of the construction machine. Next, the analysis unit 212 calculates the exhaust gas emission amount from the construction machine's displacement and operation time. The analysis unit 212 then determines the emission amount and the specifications (placement, size, etc.) of the recovery pipe 105 from the operating range of the construction machine M1 to the recovery line 101. In this case, a placement that does not overlap with the movement lines of other construction machines M1 is used. Furthermore, the analysis unit 212 determines the size (pipe diameter) of the recovery pipe 105 according to the transport distance calculated from the placement. Here, the larger the emission amount and the longer the transport distance, the larger the size of the recovery pipe 105 is. Note that the size of the recovery pipe 105 is not limited as long as it does not hinder work.

[0045] Next, the instruction unit 213 of the control unit 21 of the support server 20 issues an instruction to place the recovery pipe up to the recovery line (step S16). Here, an instruction to place the recovery pipe 105 is output to the management device 30 for each construction machine. This instruction includes information about the construction machine to which the recovery pipe 105 is connected and its size. Next, the recovery pipe is connected. Specifically, the person using the management device 30 connects the recovery pipe 105 of the instructed size from the construction machine M1 to which it is connected to the recovery line 101 (step S17). In this case, the connection is made as short a distance as possible without interfering with work.

[0046] (Use of Carbon Dioxide) Next, the use of carbon dioxide will be described with reference to FIG.

[0047] First, CO2 is recovered (step S21). Here, the exhaust gas emitted from the construction machine M1 is transported to the recovery device 10 via the recovery pipe 105 and the recovery line 101, and stored in the exhaust gas storage device 111.

[0048] Next, when it is determined that the construction work for that day has ended, the control unit 21 of the support server 20 acquires exhaust gas storage information (step S22). Specifically, the acquisition unit 211 of the control unit 21 determines that the construction work for that day has ended using the work plan information recorded in the work plan memory unit 23. Then, when it is determined that the construction work has ended, the acquisition unit 211 acquires information on the volume of exhaust gas stored in the exhaust gas storage device 111 and the carbon dioxide concentration from the measuring instrument D11 of the recovery device 10. In this case, the acquired information is recorded as recovery management information in the recovery information memory unit 24 according to the measurement values ​​of the flow meter 123 and the measuring instruments D11 and D12. The amount of recovered carbon dioxide can be calculated from this recovery management information.

[0049] Next, the control unit 21 of the support server 20 acquires the start time of CO2 use (step S23). Specifically, the acquisition unit 211 of the control unit 21 identifies the work content and time period for starting construction work using CO2 from the work plan storage unit 23. For example, if carbon dioxide is mixed into concrete, the acquisition unit 211 identifies the start time of pouring the carbon dioxide-mixed concrete.

[0050] Next, the control unit 21 of the support server 20 calculates the grace period until the start time of use (step S24). Specifically, the analysis unit 212 of the control unit 21 calculates the time difference (grace period) from the current time to the scheduled execution time.

[0051] Next, the control unit 21 of the support server 20 determines the concentration grade according to the usage of CO2 (step S25). Specifically, the analysis unit 212 of the control unit 21 determines the required concentration grade and usage amount of carbon dioxide according to the specified work content. For example, when carbon dioxide is mixed into concrete, the concentration grade of carbon dioxide to be mixed into the concrete and the amount to be mixed according to the amount of concrete are specified.

[0052] Next, the control unit 21 of the support server 20 determines the separation method according to the grace period (step S26). Specifically, the analysis unit 212 of the control unit 21 identifies a separation method that can generate the amount and concentration of carbon dioxide required for construction within the grace period. For example, if there is sufficient grace period, a separation method with low cost is prioritized. On the other hand, if there is little grace period, a separation method with high separation speed is prioritized.

[0053] Next, the control unit 21 of the support server 20 issues a separation instruction (step S27). Specifically, the instruction unit 213 of the control unit 21 outputs the separation instruction to the management device 30. This separation instruction includes information on the carbon dioxide separation method.

[0054] (Operation of the embodiment) Since the recovery line 101 and the recovery device 10 are provided at the construction site, the carbon dioxide emitted from the construction machine M1 is stored within the construction site.

[0055] (Effects of the embodiment) (1) In the present embodiment, a recovery line is arranged in the outer ditch (step S11). This makes it possible to recover exhaust gas emitted from the construction machine M1 by utilizing the outer perimeter of the construction site.

[0056] (2) In this embodiment, the control unit 21 of the support server 20 acquires the construction schedule (step S12) and identifies the work content of the construction machine (step S13). This makes it possible to identify the construction machine M1 that emits carbon dioxide.

[0057] (3) In this embodiment, the control unit 21 of the support server 20 determines the location of the construction machine and the operating range according to the work content (step S14). This allows the installation position of the exhaust gas recovery pipe 105 to be determined.

[0058] (4) In this embodiment, the control unit 21 of the support server 20 sets the specifications of the recovery pipe 105 (step S15) depending on the work content. This makes it possible to determine the minimum size of the recovery pipe 105 necessary to recover the exhaust gas.

[0059] (5) In this embodiment, when the completion of the construction work for the day is detected, the control unit 21 of the support server 20 acquires exhaust gas storage information (step S22). This allows the status of the exhaust gas to be separated to be grasped. Since carbon dioxide separation is performed after the completion of the construction work for the day, the overall energy consumption at the construction site can be leveled out.

[0060] (6) In this embodiment, the start time of CO2 utilization is acquired (step S23), and the grace period until the start time of utilization is calculated (step S24). This makes it possible to grasp the time available for carbon dioxide separation.

[0061] (7) In this embodiment, the control unit 21 of the support server 20 determines the concentration grade according to the usage of CO2 (step S25) and determines the separation method according to the grace period (step S26). This allows the separation method of carbon dioxide to be determined taking cost performance into consideration.

[0062] (8) In this embodiment, the carbon dioxide stored in the CO2 storage device 113 is used in the processing equipment 150. This allows the carbon dioxide generated at the construction site 100 to be used within the construction site 100, thereby reducing the effort required for transportation, etc.

[0063] This embodiment can be implemented with the following modifications. This embodiment and the following modifications can be implemented in combination with each other to the extent that there is no technical contradiction. In the above embodiment, for example, a backhoe can be used as the construction machine M1. The construction machine M1 is not limited to a backhoe. The construction machine M1 can also be a bulldozer, wheel loader, crane, pile driver, concrete pump truck, dump truck, mixer truck, trailer, or other construction machine that emits carbon dioxide. In the above embodiment, the recovery line 101 and recovery pipe 105, which serve as transport equipment, the exhaust gas storage device 111, which serves as storage equipment, and the separation device 112, which serves as separation equipment, are provided within the construction site 100. Alternatively, the construction machine M1 may be provided with separation equipment, and a transport facility may be provided between the exhaust gas outlet and the separation facility. The separated carbon dioxide is then transported from the separation facility to a storage facility within the construction site 100. In this case, since the separated carbon dioxide is transported, a smaller transport volume can be achieved than if the exhaust gas itself were transported. Furthermore, the construction machine M1 may be provided with equipment for storing the carbon dioxide separated from the exhaust gas. For example, as shown in FIG. 8 , an on-board device M2 is provided on a construction machine M1. The on-board device M2 is equipped with an exhaust gas storage device 111, a separation device 112, and a CO2 storage device 113. In this case, measuring instruments D11 and D12 are also provided. Then, carbon dioxide contained in the exhaust gas emitted from the construction machine M1 used in work at the construction site 100 is extracted from the CO2 storage device 113 and used at the construction site 100. Furthermore, the construction machine M1 equipped with the transport equipment, separation equipment, and storage equipment may move outside the construction site 100. For example, a transport vehicle such as a dump truck, mixer truck, or trailer that transports materials, equipment, and waste materials from the construction site 100 outside the construction site 100 is used as the construction machine M1. In this case, the identification information of the transport vehicle and the identification information of the construction site 100 where the transport vehicle is used are registered in association with each other in the support server 20. The support server 20 then manages carbon dioxide so that the carbon dioxide contained in the exhaust gas emitted from the transport vehicle is utilized at the construction site 100 based on the usage history of the transport vehicle used at the construction site 100.The storage facility may be divided into a first storage facility for temporary storage at the construction machine M1 and a second storage facility for storage at the construction site 100.

[0064] In the above embodiment, the recovery line 101 is provided in the external structure surrounding the construction site 100. The location of this recovery line 101 is not limited to the periphery of the construction site 100. For example, the construction information storage unit 22 and the work plan storage unit 23 may be used to identify a location where the construction machine M1 may be installed. Then, the recovery line 101 is provided in an area where exhaust gas can be recovered from the construction machine M1 within this location. In the above embodiment, the recovery line 101 is provided in the external structure surrounding the construction site 100. This recovery line 101 may also serve as a rainwater pipe for recovering rainwater. As shown in FIG. 7 , exhaust gas 171 and rainwater 172 are recovered by the same recovery line 161. In this case, the recovery pipe 105 for the exhaust gas 171 is connected above the recovery line 161, and the recovery pipe 162 for the rainwater 172 is connected below the recovery line 161. This prevents the exhaust gas 171 from flowing back into the recovery pipe 162 by the rainwater 172 accumulated below. In this case, the pipe diameter of the recovery line 161 is determined taking into consideration the maximum amount of drainage of rainwater 172 .

[0065] In the above embodiment, a device for mixing carbon dioxide into concrete is used as the processing equipment 150. Here, the processing method is not limited as long as carbon dioxide can be used. For example, if there is bedrock or ground suitable for immobilizing carbon dioxide underground at a construction site, an immobilization device can be used underground at the site. It can also be used as a shielding gas for welding work at a construction site. Dry ice may also be produced from carbon dioxide at the construction site and used for cooling. Carbon dioxide may also be stored in a container and transported to a processing equipment 150 located elsewhere.

[0066] In the above embodiment, the separation device 112 separates carbon dioxide from the exhaust gas using a membrane separation method. As long as carbon dioxide can be separated, the method is not limited to membrane separation, and liquid absorption, solid adsorption, etc. may also be used. For example, carbon dioxide separation methods include, in addition to membrane separation, chemical absorption, chemical adsorption, and physical adsorption. Chemical absorption is a method in which carbon dioxide is chemically reacted with an absorbent to capture it within the absorbent. Examples of absorbents that can be used include ammonia, sodium hydroxide, and calcium hydroxide. Chemical adsorption is a method in which carbon dioxide is chemically reacted with an adsorbent to capture it on the surface of the adsorbent. Examples of adsorbents that can be used include alumina, silica, and zeolite. Physical adsorption is a method in which carbon dioxide is captured on the surface of the adsorbent by the surface tension of the adsorbent. Examples of adsorbents that can be used include activated carbon, zeolite, and silica gel. Among these methods, the separation method is determined taking into account the time and cost required to reach a predetermined concentration grade.

[0067] In the above embodiment, the support server 20 includes a control unit 21, a construction information storage unit 22, and a work plan storage unit 23. As long as it can identify information about construction machinery used at the construction site and construction work performed using the construction machinery, it is not limited to construction management information and work plan information using BIM. Note that BIM in this embodiment includes CIM (Construction Information Modeling / Management) used in civil engineering work, etc., and is a concept that indicates modeling technology that can be applied to construction in general.

[0068] In the above embodiment, the control unit 21 of the support server 20 performs the processes from obtaining the construction plan (step S12) to issuing an instruction to arrange the collection pipe to the collection line (step S16). These processes may be performed manually.

[0069] In the above embodiment, the control unit 21 of the support server 20 performs the processes from storing information about exhaust gas (step S22) to issuing a separation instruction (step S27). These processes may be performed manually.

[0070] In the above embodiment, when it is determined that the construction work for that day has ended, the control unit 21 of the support server 20 acquires exhaust gas storage information (step S22). Here, the end of the construction work for that day is determined using the work plan information recorded in the work plan storage unit 23. The method for determining the end of the construction work is not limited to the use of the work plan. For example, a predetermined time may be used. Alternatively, the power consumption at the construction site may be detected and a time period with low power consumption may be used.

[0071] In the above embodiment, when it is determined that the construction work for that day has ended, the control unit 21 of the support server 20 acquires exhaust gas storage information (step S22). Here, carbon dioxide separation may be performed simultaneously with exhaust gas recovery during the construction work for that day, without waiting for the construction work for that day to end. In this case, it is confirmed that the storage capacity of the exhaust gas has reached a level where carbon dioxide can be separated, depending on the storage status of the exhaust gas. This allows for separation to be performed with sufficient time before the carbon dioxide is to be used.

[0072] In the above embodiment, the recovery device 10 includes an exhaust gas storage device 111, a separation device 112, and a CO2 storage device 113. Alternatively, the separation devices 112 may be provided at multiple locations on the recovery line 101. In this case, the recovery line is divided into a line that transports gas with a low carbon dioxide concentration before separation and a line that transports gas with a high carbon dioxide concentration after separation. Furthermore, the separation device 112 may be moved depending on the work location on the day.

[0073] In the above embodiment, the recovery device 10 includes the exhaust gas storage device 111, the separation device 112, and the CO2 storage device 113. Here, the separated carbon dioxide may be used in the processing facility device 150 without being stored.

[0074] Next, the technical ideas that can be grasped from the above embodiments and other examples are additionally described below. (a1) A carbon dioxide management system or a carbon dioxide management method, further comprising an exhaust gas storage facility on the construction site that temporarily stores the exhaust gas transported by the transport facility at the construction site. (a2) A carbon dioxide management system or a carbon dioxide management method, further comprising processing facility that processes the carbon dioxide stored by the storage facility. (b1) A carbon dioxide management system or a carbon dioxide management method, characterized by storing exhaust gas emitted during work by construction machinery at a construction site, separating carbon dioxide from the exhaust gas, specifying construction details that will use the carbon dioxide from a construction plan, and determining a concentration grade of the carbon dioxide depending on the construction details.

[0075] (b2) The carbon dioxide management system or carbon dioxide management method described in (b1) above, characterized in that, in the construction content, the next scheduled construction time is specified, a grace period from the start time of the carbon dioxide separation to the scheduled construction time is calculated, and the carbon dioxide separation method is determined according to the grace period.

[0076] (c1) A carbon dioxide management system or carbon dioxide management method, characterized by: identifying the work content of construction machinery at a construction site; identifying the location of the construction machinery according to the work content; and determining the specifications of the carbon dioxide recovery pipe according to the work content and the location of the construction machinery.

[0077] (c2) A carbon dioxide management system or a carbon dioxide management method according to (c1) above, characterized in that a work plan relating to a construction machine is acquired, and the work content of the construction machine is specified in the work plan.

[0078] (c3) A carbon dioxide management system or carbon dioxide management method described in (c1) or (c2) above, characterized in that BIM information of the construction object at the construction site is acquired, and the work content of the construction machinery is identified based on the construction work of the components in the BIM information.

[0079] (d1) A carbon dioxide management program that causes a computer to function as a means for identifying the work content of construction machinery at a construction site, identifying the placement of the construction machinery according to the work content, and determining the specifications of the carbon dioxide recovery pipe according to the work content and the placement of the construction machinery.

Claims

1. A carbon dioxide management system comprising: a separation facility that separates carbon dioxide from exhaust gas emitted by construction machinery used at construction sites; and a storage facility that stores the carbon dioxide separated by the separation facility so that it can be utilized.

2. A carbon dioxide management system as described in claim 1, further comprising a processing facility for processing the carbon dioxide stored by the storage facility.

3. A carbon dioxide management system as described in claim 1 or 2, further comprising a transport facility for transporting exhaust gas emitted from construction machinery used at the construction site to the separation facility within the construction site.

4. A carbon dioxide management system as described in claim 3, characterized in that the transport equipment is installed in a storm water pipe installed at the construction site.

5. A carbon dioxide management system as described in claim 3 or 4, further comprising an exhaust gas storage facility within the construction site for temporarily storing the exhaust gas transported by the transportation facility at the construction site.

6. A carbon dioxide management system as described in claim 1 or 2, further comprising a transport facility for transporting the carbon dioxide separated by the separation facility from the exhaust gas discharged from the construction machinery used at the construction site.

7. A carbon dioxide management system according to claim 1 or 2, further comprising a support server that executes support processing for the utilization of the captured carbon dioxide.

8. The carbon dioxide management system described in claim 7, further comprising a first control unit, wherein the support server identifies construction content using the carbon dioxide from a construction plan at the construction site, and determines a concentration grade of the carbon dioxide in the separation equipment in accordance with the construction content.

9. The carbon dioxide management system described in claim 8, characterized in that the support server: identifies the next scheduled construction time for the construction content; calculates a grace period from the start of the carbon dioxide separation to the scheduled construction time; and determines a method for separating the carbon dioxide in the separation equipment according to the grace period.

10. A carbon dioxide management system as described in claim 7 or 8, characterized in that the support server: identifies the work content of construction machinery at a construction site; identifies the location of the construction machinery according to the work content; and determines the specifications of the carbon dioxide recovery pipe in a transport facility that transports exhaust gas emitted from the construction machinery used at the construction site to the separation facility within the construction site according to the work content and the location of the construction machinery.

11. A carbon dioxide management system as described in claim 7 or 8, characterized in that the support server acquires a work plan related to construction machinery, and specifies the work content of the construction machinery in the work plan.

12. A carbon dioxide management system as described in claim 10 or 11, characterized in that the support server acquires BIM information of the construction object at the construction site, and identifies the work content of the construction machinery based on the construction work of the components in the BIM information.

13. A carbon dioxide management method comprising the steps of: providing processing equipment within a construction site; using a separation equipment to separate carbon dioxide from exhaust gas discharged from construction machinery used at the construction site; storing the carbon dioxide separated by the separation equipment using a storage equipment; and utilizing the carbon dioxide in the processing equipment.

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