Ships and display devices

Abstract

To provide a vessel and a display device capable of accurately grasping an exhaust amount of greenhouse effect gas.SOLUTION: An exhaust system 40 exhausts exhaust gas including at least one component of nitrous oxide and methane. A measuring unit 41 is capable of measuring at least one component of the nitrous oxide or methane. Thus, by utilizing measured results of exhaust quantities of components other than the nitrous oxide in a greenhouse effect gas, an exhaust quantity of the greenhouse effect gas can be accurately grasped.SELECTED DRAWING: Figure 2

Description

Technical Field

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[0001] The present invention relates to a ship and a display device.

Background Art

[0002] A ship discharges exhaust gas from equipment such as an engine to the outside. Conventionally, there is known a ship that controls the treatment of exhaust gas based on regulatory values for components contained in the exhaust gas (for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Exhaust gas discharged from a ship contains components of greenhouse gases (GHG: Greenhouse Gas) and is subject to regulations on the emission amount. The components of greenhouse gases include not only carbon dioxide but also nitrous oxide, methane, and the like. However, conventional ships have a problem in that they cannot monitor components other than carbon dioxide and cannot accurately grasp the emission amount of greenhouse gases.

[0005] The present invention has been made to solve such problems, and an object thereof is to provide a ship and a display device capable of accurately grasping the emission amount of greenhouse gases.

Means for Solving the Problems

[0006] The ship according to the present invention includes an exhaust system that discharges exhaust gas containing at least one of nitrous oxide and methane, and a measuring unit that measures the emission amount of the component.

[0007] In the vessel according to the present invention, the exhaust system emits exhaust gas containing at least one of nitrous oxide and methane. The measuring unit can measure the emission amount of at least one of nitrous oxide and methane. In this way, by using the measurement results of the emission of greenhouse gases other than carbon dioxide, the total amount of greenhouse gas emissions can be accurately determined.

[0008] The exhaust system includes an ammonia engine, and the measuring unit may measure the emission of nitrous oxide. Since the exhaust gas of an ammonia engine contains nitrous oxide, which has a very high global warming effect even in small amounts, measuring the emission of nitrous oxide by the measuring unit allows for an accurate determination of greenhouse gas emissions.

[0009] The exhaust system includes a liquefied natural gas (LNG) engine, and the measuring unit may measure methane emissions. Since LNG engine exhaust gases contain a large amount of methane, measuring methane emissions by the measuring unit allows for an accurate determination of greenhouse gas emissions.

[0010] The measuring unit may be installed within the exhaust system and may have a sensor for detecting components. In this case, the sensor can accurately detect components contained in the exhaust gas passing through the exhaust system.

[0011] The present invention relates to a display device that displays information about a vessel equipped with an exhaust system that emits exhaust gas containing at least one component of nitrous oxide and methane, and displays the amount of emissions of the components.

[0012] This display device can be used to obtain the same functions and effects as those of the aforementioned vessel.

[0013] The display device may show the ratio of components in the exhaust gas. In this case, the user can easily understand the emissions of each component of greenhouse gases in the exhaust gas. [Effects of the Invention]

[0014] According to the present invention, it is possible to provide a ship and a display device that can accurately grasp greenhouse gas emissions. [Brief explanation of the drawing]

[0015] [Figure 1] This is a schematic cross-sectional view showing an example of a ship according to an embodiment of the present invention. [Figure 2] This is a schematic diagram showing the configuration of the monitoring system. [Figure 3] This figure shows an example of an image displayed on a display device. [Figure 4] This figure shows an example of an image displayed on a display device. [Modes for carrying out the invention]

[0016] Hereinafter, preferred embodiments of the gas processing system of the present invention will be described with reference to the drawings. In the following description, the terms "front" and "rear" correspond to the direction of travel of the ship, the term "side" corresponds to the left-right (width) direction of the ship, and the terms "up" and "down" correspond to the up-down direction of the ship.

[0017] Figure 1 is a schematic cross-sectional view showing an example of a vessel according to an embodiment of the present invention. Vessel 1 is a vessel that transports petroleum-based liquid cargo such as crude oil or liquid gas, and is, for example, an oil tanker. However, the vessel is not limited to an oil tanker, and may be, for example, a bulk carrier or various other types of vessels.

[0018] As shown in Fig. 1, the ship 1 includes a hull 11 and a propeller 12. The hull 11 has a bow 2, a stern 3, an engine room 4, a pump room 5, and a cargo hold 6. A deck 19 is provided on the upper part of the hull 11 (or inside the ship). The bow 2 is located on the front side of the hull 11. The stern 3 is located on the rear side of the hull 11. The bow 2 has a shape designed to reduce wave-making resistance, for example, in the fully loaded draft state. The propeller 12 is for propelling the hull 11, and for example, a screw shaft is used. The propeller 12 is installed below the waterline (the water surface of the sea W) at the stern 3. Also, below the waterline at the stern 3, a rudder 15 for adjusting the propulsion direction is installed.

[0019] The engine room 4 is provided at a position adjacent to the bow side of the stern 3. The engine room 4 is a compartment for arranging an engine 16 for imparting driving force to the propeller 12. On the deck 19, a living area 33 and a chimney 34 for exhaust are provided above the engine room 4. The pump room 5 is provided at a position adjacent to the bow side of the engine room 4. The pump room 5 is a compartment where pumps 17 etc. are arranged. The cargo hold 6 is provided between the bow 2 and the pump room 5. The cargo hold 6 is a compartment for storing oil-based cargo. The cargo hold 6 is divided into a cargo oil tank 26 and a ballast tank 27 by adopting a double hull structure of an outer plate 20 and an inner bottom plate 21. The cargo oil tank 26 loads the oil-based cargo transported by the ship 1. The ballast tank 27 stores a quantity of ballast water according to the size of the ship etc.

[0020] An ammonia tank 31 for storing ammonia is provided on the deck 19. Liquid ammonia is stored in the ammonia tank 31. In Fig. 1, the ammonia tank 31 is provided on the front side of the pump room 5 and also on the upper side of the stern 3.

[0021] The ship 1 is equipped with a monitoring system 100 for monitoring the emissions of greenhouse gases (GHG: Greenhouse Gas). FIG. 2 is a schematic configuration diagram showing the configuration of the monitoring system 100. As shown in FIG. 2, the monitoring system 100 includes an exhaust system 40, a measurement unit 41, and a display device 42.

[0022] The exhaust system 40 is a system that discharges exhaust gas containing components of greenhouse gases. The exhaust system 40 includes an engine 16, an exhaust passage 43, and a chimney 34. The engine 16 is an emission source that discharges exhaust gas containing components of greenhouse gases. In the present embodiment, an ammonia engine is adopted as the engine 16. The ammonia engine is an engine that can operate using ammonia as fuel. The exhaust passage 43 is a passage that guides the exhaust gas discharged from the engine 16 to the chimney 34. The exhaust passage 43 is disposed at an arbitrary location within the hull 11.

[0023] As greenhouse gases, in addition to carbon dioxide (CO2), at least one component of nitrous oxide (N2O) and methane (CH4) is included. In the present embodiment, an ammonia engine is adopted as the engine 16. Therefore, the exhaust gas contains a large amount of nitrous oxide as a greenhouse gas. In addition, as greenhouse gases, components such as nitrogen oxides (NOx) and sulfur oxides (SOx) may be included.

[0024] The measurement unit 41 measures the emissions of greenhouse gas components. In this embodiment, since an ammonia engine is used as the engine 16, the measurement unit 41 measures at least the emissions of nitrous oxide in addition to carbon dioxide. The measurement unit 41 comprises a sensor 44 and a computing device 46. The sensor 44 is installed in the exhaust system 40 and is a device for detecting greenhouse gas components. In this embodiment, the measurement unit 41 comprises a CO2 sensor 44A for detecting carbon dioxide and an N2O sensor 44B for detecting nitrous oxide as the sensor 44. However, the measurement unit 41 may further have sensors for nitrogen oxides (NOx), sulfur oxides (SOx), etc. as the sensor 44. The sensor 44 outputs the detection results to the computing device 46. The sensor 44 detects the concentration of components contained in the exhaust gas.

[0025] The calculation unit 46 is a device that calculates the emissions of greenhouse gas components. The calculation unit 46 calculates the emissions of greenhouse gas components based on the detection results of the sensor 44. For example, the calculation unit 46 can calculate the emissions of nitrous oxide by multiplying the concentration of nitrous oxide detected by the N2O sensor 44B by the flow rate of exhaust gas detected by a flow meter (not shown). If a flow meter is not available, a method may be used to determine the emissions of each greenhouse gas component from fuel consumption and CO2 concentration. CO2 emissions can be estimated by multiplying fuel consumption by a CO2 conversion factor. Therefore, the emissions of each greenhouse gas component can also be calculated as "(concentration of each greenhouse gas) / (concentration of CO2) × (CO2 emissions)". The CO2 conversion factor is a factor used to convert combustion consumption into CO2 emissions, and can be determined, for example, using the "IMO Guidelines for Calculation and Certification of Energy Efficiency Design Indices".

[0026] Furthermore, the calculation device 46 can calculate the emissions of greenhouse gas components other than carbon dioxide as the equivalent emissions in carbon dioxide (CO2 equivalent emissions). The calculation device 46 can calculate the carbon dioxide equivalent emissions by multiplying the emissions of greenhouse gas components by a GHG coefficient predetermined for that component. Therefore, the calculation device 46 can calculate the "CO2 equivalent emissions" obtained by converting the total greenhouse gas emissions of ship 1 into carbon dioxide using equation (1). The calculation device 46 outputs the calculation results to the display device 42. The calculation device 46 can also calculate various information to be displayed on the display device 42. (CO2 equivalent emissions) = Σ{(GHG coefficient for each component) × (emissions from each component)} …(1)

[0027] The display device 42 is a device that displays various information indicating greenhouse gas emissions. The display device 42 consists of equipment that visually outputs information, such as a monitor. The display device 42 is installed in the cockpit of the ship 1, etc. Alternatively, the display device 42 may be installed outside the ship 1 and display information received from the computing device 46 via communication. The display device 42 displays the emissions of each component of greenhouse gases. The display device 42 also displays the ratio of each component of greenhouse gases in the exhaust gas.

[0028] Figure 3 shows an example of an image displayed on the screen of the display device 42. In the bar graph on the left side of the screen in Figure 3, "Actual Emissions" shows the actual hourly emissions of each component. In the bar graph on the left side of the screen in Figure 3, "CO2 Equivalent Emissions" shows the hourly emissions when the emissions of each component are converted to carbon dioxide. The bar graph on the left side of the screen in Figure 3 shows the current instantaneous value. In Figure 3, the components of greenhouse gases displayed are carbon dioxide (CO2), nitrous oxide (N2O), nitrogen oxides (NOx), and sulfur oxides (SOx).

[0029] In the bar graph on the right side of the screen in Figure 3, "Actual Emissions" shows the cumulative emissions of each component during a predetermined operating time. In the bar graph on the right side of the screen in Figure 3, "CO2 Equivalent Emissions" shows the cumulative emissions of each component during a predetermined operating time when the emissions of each component are converted to carbon dioxide. These bar graphs show the emissions of each component stacked in descending order of quantity. Therefore, the display device 42 can visually display the ratio of each component in the exhaust gas using these bar graphs. Note that the display device 42 may also display the emissions and ratios of each component as numerical values.

[0030] Each graph shows the boundary values ​​for ranks corresponding to total greenhouse gas emissions. Lower total emissions result in higher ranks, with ranks assigned sequentially from highest to lowest as "A," "B," "C," and so on. The display device 42 sets the rank for "CO2 equivalent emissions." For example, the top of the bar graph for "CO2 equivalent emissions" on the right is positioned higher than rank C. Therefore, the emission rank for ship 1 is "C." In the lower left of the screen in Figure 3, the annual CO2 equivalent emissions, which represent the total annual greenhouse gas emissions, and the emission rank for ship 1 are shown.

[0031] This rank may also be an indicator related to the Carbon Intensity Indicator (CII), a regulation used to reduce greenhouse gas emissions. This regulation ranks ships according to their measured CO2 emissions, determining the quality of the ship. If a ship's CO2 emissions are poor, it may be required to submit a ship improvement plan (such as operational modifications or decommissioning). By displaying CO2 equivalent emissions in conjunction with the CII rank, it is possible to encourage captains to operate the ship appropriately to avoid a poor CII rank. Furthermore, this display device 42 may be made accessible not only to captains on board but also to shipowners on land using the internet or applications. While the CII is expected to influence investment decisions regarding ship improvement plans (modifications, decommissioning, etc.), there is a problem in that the lifespan of a ship, which serves as the basis for ship improvement plans, is difficult to determine, making it difficult to make future investment decisions for ships. Therefore, by visually displaying CO2 equivalent emissions to shipowners, as in this display device 42, it can serve as a guideline for future investment decisions regarding ships.

[0032] Next, the ship 1 and its operation and effects according to this embodiment will be described.

[0033] In the vessel 1 according to this embodiment, the exhaust system 40 emits exhaust gas containing at least one of the components of nitrous oxide and methane. The measuring unit 41 can measure the emission amount of at least one of the components of nitrous oxide and methane. In this way, by using the measurement results of the emission amount of greenhouse gases other than carbon dioxide, the total amount of greenhouse gas emissions can be accurately determined.

[0034] As described above, if greenhouse gas emissions can be accurately determined, it becomes possible to properly implement measures to reduce greenhouse gas emissions. Furthermore, if it becomes necessary to measure greenhouse gas components other than carbon dioxide, the vessel 1 of this embodiment can respond to such a situation.

[0035] The exhaust system 40 has an ammonia engine, and the measuring unit 41 may measure the emission of nitrous oxide. Since the exhaust gas of an ammonia engine contains a large amount of nitrous oxide, the greenhouse gas emissions can be accurately determined by measuring the emission of nitrous oxide by the measuring unit 41.

[0036] The measuring unit 41 may be provided within the exhaust system 40 and may have a sensor 44 for detecting components. In this case, the sensor 44 can accurately detect components contained in the exhaust gas passing through the exhaust system 40.

[0037] The display device 42 according to this embodiment is a display device 42 that displays information about a ship 1 equipped with an exhaust system 40 that emits exhaust gas containing at least one component of nitrous oxide and methane, and displays the amount of emissions of the components.

[0038] This display device 42 can be used to obtain the same functions and effects as those of the ship 1 described above.

[0039] The display device 42 may display the ratio of components in the exhaust gas. In this case, the user can easily understand the emissions of each component of greenhouse gases in the exhaust gas.

[0040] The present invention is not limited to the embodiments described above.

[0041] In the above-described embodiment, an ammonia engine was used as the engine 16 of the exhaust system 40, but the type of engine is not particularly limited. For example, the exhaust system 40 may have a liquefied natural gas (LNG) engine as the engine 16. In this case, the measuring unit 41 may measure the amount of methane emitted. Since the exhaust gas of a liquefied natural gas engine contains a large amount of methane, the amount of greenhouse gas emissions can be accurately determined by the measuring unit 41 measuring the amount of methane emitted.

[0042] Figure 4 shows a specific example of the display content of the display device 42 when a liquefied natural gas engine is used as engine 16. In Figure 4, the components of greenhouse gases displayed are carbon dioxide (CO2), methane (CH4), nitrogen oxides (NOx), and sulfur oxides (SOx). The bar graph on the left side of the screen in Figure 4 shows the current instantaneous value of greenhouse gas emissions per hour, similar to the bar graph on the left side of the screen in Figure 3. The bar graph on the right side of the screen in Figure 4 shows the cumulative greenhouse gas emissions over a predetermined operating time, similar to the bar graph on the right side of the screen in Figure 3. In Figure 4, the top of the "CO2 equivalent emissions" bar graph on the right side is positioned higher than rank D. Therefore, the emission rank of ship 1 is "D". The lower left of the screen in Figure 4 also shows the annual CO2 equivalent emissions as the total annual greenhouse gas emissions, and the emission rank of ship 1.

[0043] In the example shown in Figure 2, the sensor 44 is installed in the exhaust passage 43, but the mounting position of the sensor 44 is not particularly limited as long as it is in a position where it can detect the components. For example, the sensor 44 may be installed near the exhaust gas outlet of the engine 16, or near the chimney 34. [Explanation of Symbols]

[0044] 1...Ship, 40...Exhaust system, 41...Measurement unit, 42...Display device, 44...Sensor.

Claims

1. A display device for displaying information about a ship equipped with an exhaust system that emits exhaust gas containing at least one component of nitrous oxide and methane, The emissions of the aforementioned components are converted to carbon dioxide and displayed. A display device that shows emissions converted to carbon dioxide, along with CII indicator results.

2. The display device according to claim 1, which displays the ratio of the components in the exhaust gas.

3. A vessel equipped with the display device described in claim 1 or 2.

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