JP2023105950A - Vessel and display device - Google Patents

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

The present invention relates to ships and display devices.

A ship discharges exhaust gas from equipment such as an engine to the outside. 2. Description of the Related Art Conventionally, ships are known that control processing of exhaust gas based on regulation values for components contained in the exhaust gas (for example, Patent Literature 1).

JP 2019-167054 A

Exhaust gases emitted from ships contain components of greenhouse gases (GHG) and are subject to emissions regulations. Components of greenhouse gases include not only carbon dioxide, but also nitrous oxide and methane. However, the conventional ship cannot monitor components other than carbon dioxide, and there was a problem that it was impossible to accurately grasp the emission amount of greenhouse gases.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vessel and a display device capable of accurately grasping the amount of greenhouse gas emissions.

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

In the ship according to the present invention, the exhaust system discharges exhaust gas containing at least one component of nitrous oxide and methane. On the other hand, the measurement unit can measure the emission amount of at least one component of nitrous oxide and methane. In this way, by using the measurement result of the emissions of components other than carbon dioxide among the greenhouse gases, it is possible to accurately grasp the emissions of greenhouse gases.

The exhaust system may have an ammonia engine, and the measurement unit may measure nitrous oxide emissions. Ammonia engine exhaust gas contains nitrous oxide, which has a very large global warming effect even in small amounts. can do.

The exhaust system may include a liquefied natural gas engine and the measuring section may measure emissions of methane. Exhaust gas from a liquefied natural gas engine contains a large amount of methane. Therefore, by measuring the amount of methane emitted by the measurement unit, it is possible to accurately grasp the amount of greenhouse gas emissions.

The measurement unit may have a sensor that is provided in the exhaust system and detects the component. In this case, the sensor can accurately detect the components contained in the exhaust gas passing through the exhaust system.

A display device according to the present invention is a display device for displaying information about a ship provided with an exhaust system for discharging exhaust gas containing at least one component of nitrous oxide and methane, and displays the emission amount of the component.

According to this display device, it is possible to obtain the same functions and effects as those of the ship described above.

The display device may display the proportions of the components in the exhaust gas. In this case, the user can easily grasp the emission amount of each greenhouse gas component in the exhaust gas.

ADVANTAGE OF THE INVENTION According to this invention, the ship and display apparatus which can grasp|ascertain correctly the discharge|emission amount of a greenhouse gas can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic sectional drawing which shows an example of the ship which concerns on embodiment of this invention. It is a schematic block diagram which shows the structure of a monitoring system. It is a figure which shows an example of the image of a display apparatus. It is a figure which shows an example of the image of a display apparatus.

Preferred embodiments of the gas processing system of the present invention will be described below with reference to the drawings. In the following explanation, the terms "front" and "rear" correspond to the direction of travel of the hull, and the term "lateral" corresponds to the lateral (width) direction of the hull. The term "bottom" corresponds to the vertical direction of the hull.

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

The ship 1 includes a hull 11 and a propeller 12, as shown in FIG. The hull 11 has a bow section 2 , a stern section 3 , an engine room 4 , a pump room 5 and a cargo room 6 . A deck 19 is provided on the top of the hull 11 (or inside the ship). The bow section 2 is located on the front side of the hull 11 . The stern portion 3 is positioned on the rear side of the hull 11 . The bow 2 has a shape designed to reduce wave-making resistance in, for example, a full draft. The propulsion device 12 propels the hull 11, and uses, for example, a screw shaft. The propeller 12 is installed below the waterline (water surface of the sea W) in the stern portion 3 . A rudder 15 for adjusting the direction of propulsion is installed below the waterline in the stern portion 3 .

The engine room 4 is provided at a position adjacent to the bow side of the stern portion 3 . The engine room 4 is a section for arranging an engine 16 for applying driving force to the propeller 12 . On the deck 19, above the engine room 4, a living space 33 and an exhaust chimney 34 are provided. The pump room 5 is provided at a position adjacent to the engine room 4 on the bow side. The pump chamber 5 is a section in which the pump 17 and the like are arranged. A cargo compartment 6 is provided between the bow section 2 and the pump compartment 5 . Cargo compartment 6 is a compartment for containing petroleum-based cargo. The cargo compartment 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 petroleum-based cargo carried by the vessel 1 . The ballast tank 27 accommodates an amount of ballast water according to the size of the ship.

The deck 19 is provided with an ammonia tank 31 that stores ammonia. Ammonia in a liquid state is stored in the ammonia tank 31 . In FIG. 1 , an ammonia tank 31 is provided on the front side of the pump chamber 5 , and an ammonia tank 31 is also provided on the upper side of the stern portion 3 .

The vessel 1 includes a monitoring system 100 that monitors emissions of greenhouse gases (GHG). FIG. 2 is a schematic configuration diagram showing the configuration of the monitoring system 100. As shown in FIG. As shown in FIG. 2, the monitoring system 100 includes an exhaust system 40, a measuring section 41, and a display device .

The exhaust system 40 is a system for discharging exhaust gas containing greenhouse gas components. The exhaust system 40 includes the engine 16 , an exhaust flow path 43 and a chimney 34 . The engine 16 is an emission source that emits exhaust gas containing greenhouse gas components. In this embodiment, an ammonia engine is employed as the engine 16 . An ammonia engine is an engine that can operate using ammonia as fuel. The exhaust flow path 43 is a flow path that guides exhaust gas discharged from the engine 16 to the chimney 34 . The exhaust flow path 43 is arranged at an arbitrary location inside the hull 11 .

Greenhouse gases include at least one of carbon dioxide (CO ₂ ), nitrous oxide (N ₂ O), and methane (CH ₄ ). In this 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, components such as nitrogen oxides (NOx) and sulfur oxides (SOx) may be included as greenhouse gases.

The measurement unit 41 measures the amount of emissions of greenhouse gas components. In this embodiment, since an ammonia engine is employed as the engine 16, the measuring unit 41 measures at least the amount of nitrous oxide emitted in addition to carbon dioxide. The measurement unit 41 includes a sensor 44 and an arithmetic device 46 . The sensor 44 is provided in the exhaust system 40 and is a device that detects the components of greenhouse gases. In this embodiment, the measurement unit 41 includes, as the sensors 44, a CO ₂ sensor 44A that detects carbon dioxide and an N ₂ O sensor 44B that detects nitrous oxide. However, the measurement unit 41 may further include sensors such as nitrogen oxides (NOx) and sulfur oxides (SOx) as the sensor 44 . The sensor 44 outputs the detection result to the computing device 46 . Note that the sensor 44 detects the concentration of components contained in the exhaust gas.

The computing device 46 is a device that computes emissions of greenhouse gas components. The computing device 46 computes the emissions of greenhouse gas components based on the detection results of the sensor 44 . For example, the arithmetic unit 46 calculates the amount of nitrous oxide emissions by multiplying the concentration of nitrous oxide detected by the N ₂ O sensor 44B and the flow rate of exhaust gas detected by a flow meter (not shown). can do. If there is no flow meter, a method of determining the emissions of each greenhouse gas component from the fuel consumption and CO ₂ concentration may be adopted. _CO2 emissions can be estimated by multiplying fuel consumption by the _CO2 conversion factor. Therefore, the emissions of each greenhouse gas component can also be calculated by "(concentration of each greenhouse gas)/(concentration of CO ₂ )×(CO ₂ emissions)". The CO ₂ conversion factor is a factor for converting combustion consumption into CO ₂ emissions, and can be obtained using, for example, the "Guidelines for Calculation and Certification of Energy Efficiency Design Indices of IMO".

Further, the computing device 46 can compute the emissions of greenhouse gas components other than carbon dioxide as emissions when converted to carbon dioxide (calculated _CO2 emissions). The computing device 46 can compute carbon dioxide equivalent emissions by multiplying the emission of a greenhouse gas component by a GHG factor preset for that component. Therefore, the computing device 46 can compute the "CO ₂ equivalent emissions" obtained by converting the total greenhouse gas emissions of the ship 1 into carbon dioxide using the equation (1). The calculation device 46 outputs the calculation result to the display device 42 . Note that the calculation device 46 can calculate various types of information to be displayed on the display device 42 .

( _CO2 equivalent emissions) = Σ {(GHG factor of each component) x (emissions of each component)} (1)

The display device 42 is a device that displays various types of information indicating the amount of greenhouse gas emissions. The display device 42 is configured by a device that visually outputs information, such as a monitor. The display device 42 is arranged in the cockpit of the ship 1 or the like. The display device 42 may be provided outside the ship 1 to display information received from the arithmetic device 46 through communication. The display device 42 displays the emission amount of each component of the greenhouse gas. In addition, the display device 42 displays the ratio of each greenhouse gas component in the exhaust gas.

FIG. 3 is a diagram showing an example of an image displayed on the screen of the display device 42. As shown in FIG. In the bar graph on the left side of the screen in FIG. 3, "Actual Discharge" indicates the actual discharge per hour of each component. In the bar graph on the left side of the screen in FIG. 3, "CO ₂ equivalent emission" indicates the emission amount per hour when the emission amount of each component is converted to carbon dioxide. The bar graph on the left side of the screen in FIG. 3 shows the current instantaneous values. Note that FIG. 3 shows carbon dioxide (CO ₂ ), nitrous oxide (N ₂ O), nitrogen oxides (NOx), and sulfur oxides (SOx) as greenhouse gas components.

In the bar graph on the right side of the screen in FIG. 3, "Actual Emissions" indicates the cumulative emissions of each component during the actual predetermined operating time. In the bar graph on the right side of the screen in FIG. 3, "CO ₂ equivalent emissions" indicates the cumulative emissions 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. Therefore, the display device 42 can visually display the ratio of each component in the exhaust gas using these bar graphs. Note that these display devices 42 may indicate the discharge amount and ratio of each component as numerical values.

Each graph shows the boundary value of the rank according to the total amount of greenhouse gas emissions. The lower the total emission amount, the higher the evaluation rank. The display device 42 sets a rank for the " _CO2 equivalent emissions". For example, the upper end of the bar graph of "CO ₂ equivalent emissions" on the right side is arranged at a position higher than rank C. Therefore, the rank of the emission amount of ship 1 is "C". At the bottom left of the screen in FIG. 3, the annual _CO2 equivalent emissions as the total greenhouse gas emissions per year and the ranking of the emissions of ship 1 are shown.

Note that this rank may be an index according to a rule called CII (Carbon Intensity Indicator), which is an index used for reducing greenhouse gases. This regulation assigns _a rating to a ship according to the measured _CO2 emissions of the ship. (remodeling, dismantling, etc.) is obligatory. In this way, by displaying the CO2 _- equivalent emissions in association with the CII rank, it is possible to prompt the captain to carry out proper operation so that the CII rank does not deteriorate. In addition, the display device 42 may be configured so that not only the captain on board but also the ship owner on land can confirm using the Internet or an application. CII is expected to affect investment decisions for ship improvement plans (remodeling, dismantling, etc.), but it is difficult to understand the life span of a ship, which is the basis for ship improvement plans, and investment decisions for the future of ships cannot be made. There is a problem of difficulty. Therefore, by visually displaying the amount of CO ₂ equivalent emission to the ship owner like this display device 42, it can be used as a guideline for future investment decisions of the ship.

Next, the operation and effect of the ship 1 according to this embodiment will be described.

In the ship 1 according to this embodiment, the exhaust system 40 discharges exhaust gas containing at least one component of nitrous oxide and methane. On the other hand, the measuring unit 41 can measure the emission amount of at least one component of nitrous oxide and methane. In this way, by using the measurement result of the emissions of components other than carbon dioxide among the greenhouse gases, it is possible to accurately grasp the emissions of greenhouse gases.

As described above, if the amount of greenhouse gas emissions can be accurately ascertained, it is possible to correctly implement measures to reduce greenhouse gases. Moreover, when it becomes necessary to measure components of greenhouse gases other than carbon dioxide, the ship 1 of the present embodiment can cope with the situation.

The exhaust system 40 may have an ammonia engine, and the measurement unit 41 may measure the amount of nitrous oxide emissions. Since the exhaust gas of the ammonia engine contains a large amount of nitrous oxide, the measurement unit 41 measures the amount of nitrous oxide emitted, so that the amount of greenhouse gas emitted can be accurately grasped.

The measurement unit 41 may have a sensor 44 that is provided in the exhaust system 40 and detects the component. In this case, the sensor 44 can accurately detect components contained in the exhaust gas passing through the exhaust system 40 .

The display device 42 according to the present embodiment is a display device 42 that displays information about the ship 1 provided with an exhaust system 40 that discharges exhaust gas containing at least one component of nitrous oxide and methane. Display quantity.

According to this display device 42, it is possible to obtain the same functions and effects as those of the ship 1 described above.

The display 42 may display the proportions of the components in the exhaust gas. In this case, the user can easily grasp the emission amount of each greenhouse gas component in the exhaust gas.

The invention is not limited to the embodiments described above.

In the above-described embodiment, an ammonia engine is used as the engine 16 of the exhaust system 40, but the type of engine is not particularly limited. For example, exhaust system 40 may comprise engine 16, a liquefied natural gas (LNG) engine that may be fueled by liquefied natural gas (LNG). In this case, the measuring unit 41 may measure the amount of methane emissions. Exhaust gas from a liquefied natural gas engine contains a large amount of methane. Therefore, measuring the amount of methane emitted by the measurement unit 41 enables an accurate grasp of the amount of greenhouse gas emissions.

FIG. 4 shows a specific example of display contents of the display device 42 when a liquefied natural gas engine is adopted as the engine 16. As shown in FIG. Note that FIG. 4 shows carbon dioxide (CO ₂ ), methane (CH ₄ ), nitrogen oxides (NOx), and sulfur oxides (SOx) as greenhouse gas components. The bar graph on the left side of the screen in FIG. 4 shows the current instantaneous value of greenhouse gas emissions per hour, like the bar graph on the left side of the screen in FIG. The bar graph on the right side of the screen in FIG. 4, like the bar graph on the right side of the screen in FIG. 3, shows cumulative greenhouse gas emissions for a given operating time. In FIG. 4 , the upper end of the bar graph of “CO ₂ equivalent emissions” on the right side is positioned higher than rank D. In FIG. Therefore, the rank of the emission amount of ship 1 is "D". Also shown in the lower left of the screen in FIG. 4 are the annual _CO2 equivalent emissions as the total greenhouse gas emissions per year and the rank of the emissions of ship 1 .

In the example shown in FIG. 2, the sensor 44 is provided in the exhaust flow path 43, but the mounting position of the sensor 44 is not particularly limited as long as the component can be detected. For example, the sensor 44 may be located near the exhaust gas outlet of the engine 16 and may be located near the chimney 34 .

DESCRIPTION OF SYMBOLS 1... Ship, 40... Exhaust system, 41... Measurement part, 42... Display device, 44... Sensor.

Claims (6)

an exhaust system for discharging an exhaust gas containing at least one component of nitrous oxide and methane;
and a measurement unit that measures the discharge amount of the component. the exhaust system has an ammonia engine;
The ship according to claim 1, wherein the measurement unit measures the amount of nitrous oxide discharged. the exhaust system comprises a liquefied natural gas engine;
The ship according to claim 1, wherein said measurement unit measures methane emissions. The ship according to any one of claims 1 to 3, wherein said measurement unit is provided in said exhaust system and has a sensor for detecting said component. A display device for displaying information about a ship equipped with an exhaust system that emits an exhaust gas containing at least one component of nitrous oxide and methane,
A display device for displaying the discharge amount of the component. 6. A display device according to claim 5, which displays the ratio of said component in said exhaust gas.

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