WO2023054232A1 - 液化ガス監視システム - Google Patents
液化ガス監視システム Download PDFInfo
- Publication number
- WO2023054232A1 WO2023054232A1 PCT/JP2022/035601 JP2022035601W WO2023054232A1 WO 2023054232 A1 WO2023054232 A1 WO 2023054232A1 JP 2022035601 W JP2022035601 W JP 2022035601W WO 2023054232 A1 WO2023054232 A1 WO 2023054232A1
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- WIPO (PCT)
- Prior art keywords
- liquefied gas
- container
- supplied
- gas
- amount
- Prior art date
Links
- 238000012544 monitoring process Methods 0.000 title claims abstract description 22
- 230000007613 environmental effect Effects 0.000 claims abstract description 110
- 239000007789 gas Substances 0.000 claims description 353
- 239000007788 liquid Substances 0.000 claims description 109
- 239000012530 fluid Substances 0.000 abstract 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 9
- 239000001257 hydrogen Substances 0.000 description 8
- 229910052739 hydrogen Inorganic materials 0.000 description 8
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- 230000008016 vaporization Effects 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 150000002431 hydrogen Chemical class 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 150000004678 hydrides Chemical class 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- UAEPNZWRGJTJPN-UHFFFAOYSA-N methylcyclohexane Chemical compound CC1CCCCC1 UAEPNZWRGJTJPN-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- GYNNXHKOJHMOHS-UHFFFAOYSA-N methyl-cycloheptane Natural products CC1CCCCCC1 GYNNXHKOJHMOHS-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Information and communication technology [ICT] specially adapted for implementation of business processes of specific business sectors, e.g. utilities or tourism
- G06Q50/06—Energy or water supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C3/00—Vessels not under pressure
- F17C3/02—Vessels not under pressure with provision for thermal insulation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/12—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in capacitance, i.e. electric circuits therefor
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Information and communication technology [ICT] specially adapted for implementation of business processes of specific business sectors, e.g. utilities or tourism
- G06Q50/10—Services
Definitions
- the present disclosure relates to a liquefied gas monitoring system.
- liquefied gas which is a liquefied single-component gas
- Single component gases are, for example, hydrogen, ammonia, methane, and the like.
- a common method for liquefying gas is to cool and condense the gas.
- an organic hydride for example, methylcyclohexane
- an organic hydride obtained by combining benzene or naphthalene with hydrogen that can be reversibly released is liquid at normal temperature and normal pressure, so there is also a method of using this as a liquefied gas. That is, when organic hydrides are used, the liquefaction of hydrogen is accomplished by combining it with the carrier.
- Liquefied gas may be mixed with the same type of liquefied gas in a container during the distribution process.
- the environmental value of the liquefied gas differs depending on the production method and other factors. Therefore, when liquefied gases with different environmental values are mixed in a container, the environmental value of the liquefied gases changes.
- electricity trading environmental value is also subject to trading in addition to trading of electricity itself. It is believed that the same will apply to liquefied gas transactions in the future. Therefore, in the case where liquefied gases with different environmental values are mixed and distributed, it is necessary to calculate the environmental value after mixing in order to ensure the reliability of the transaction.
- the "environmental value of liquefied gas” is the economic value that indicates how much the production of gas, which is a single component, has contributed to reducing the environmental impact. For example, if the amount of carbon dioxide emitted during the production of gas, which is a single component, is small, the environmental value will be high. If a single-component gas is produced through chemical bonding between different components (e.g., hydrogen and nitrogen are chemically combined to produce ammonia), the amount of carbon dioxide emitted during the production of those components is also reflected in the environmental value.
- different components e.g., hydrogen and nitrogen are chemically combined to produce ammonia
- Patent Document 1 in a hydrogen gas supply system that supplies hydrogen gas to a user as fuel, hydrogen gases with different environmental values are mixed in a hydrogen gas container, and the environmental value of these hydrogen gases and after mixing Although it is described that the environmental value of hydrogen gas is separately displayed on a display device, the technique described in Patent Document 1 does not involve mixing liquefied gases as described above.
- an object of the present disclosure is to provide a liquefied gas monitoring system capable of accurately grasping the amount of mixed liquefied gas and the environmental value.
- the present disclosure provides a container for storing liquefied gas obtained by liquefying a single-component gas, a liquid level sensor for detecting the height of the liquid level in the container, and the liquefied gas supplied to the container every time the gas is supplied. and a controller to which the environmental value of the liquefied gas is input, wherein the controller controls the level of liquid in the container based on the liquid level detected by the liquid level sensor before the liquefied gas is supplied to the container.
- the amount of the remaining liquefied gas supplied last time is determined and recorded together with the environmental value, and is supplied this time based on the liquid level detected by the liquid level sensor after the liquefied gas is supplied to the container.
- a liquefied gas monitoring system is provided for determining and recording the amount of liquefied gas collected along with said environmental value.
- FIG. Fig. 3 shows the condition of the vessel after initial loading; It is a figure which shows the state before unloading from the said vessel. It is a figure which shows the state after unloading from the said ship.
- Fig. 3 shows the condition of the ship before the second loading;
- Fig. 4 shows the vessel after a second loading;
- a liquefied gas monitoring system 1 is mounted on a ship 5 .
- the liquefied gas monitoring system 1 may be mounted on fixed equipment such as marine equipment or land equipment, or may be mounted on a moving body (for example, a tank truck, a railroad vehicle, an airplane, etc.) that moves on land or in the air. good.
- Figures 1A and 1B are diagrams for explaining the initial loading of the ship 5.
- Figure 1A shows the state before loading
- Figure 1B shows the state after loading.
- the liquefied gas monitoring system 1 includes a container 2 that stores liquefied gas 9 obtained by liquefying a single-component gas.
- Single component gases are, for example, hydrogen, ammonia, methane, and the like.
- the liquefied gas 9 may contain almost no impurities, or may contain impurities to some extent (for example, 10% by mass or less).
- the liquefied gas 9A having the environmental value Xa is stored in the container 2 before the first loading. That is, the container 2 is supplied with the liquefied gas 9A before the first loading. The gas layer above the liquid surface of the liquefied gas 9A in the container 2 is filled with vaporized gas obtained by vaporizing the liquefied gas 9A.
- the liquefied gas monitoring system 1 also includes a liquid level sensor 31 that detects the liquid level in the container 2 and a controller 4 electrically connected to the liquid level sensor 31 .
- the liquid level sensor 31 may be of any type, such as a float type, differential pressure type, ultrasonic wave type, laser type, or the like.
- the controller 4 is also electrically connected to the pressure sensor 32 and the temperature sensor 33 .
- the pressure sensor 32 detects the pressure of the air layer inside the container 2 and the temperature sensor 33 detects the temperature of the air layer inside the container 2 .
- the temperature sensor 33 may detect the temperature of the liquefied gas 9 inside the container 2 .
- the controller 4 is also electrically connected to the display 41 .
- the environmental value X of the liquefied gas 9 is input to the controller 4 each time the liquefied gas 9 is supplied to the container 2 .
- the liquefied gas 9A is supplied to the container 2 before the first loading, so the environmental value Xa of the liquefied gas 9A is input to the controller 4 .
- controller 4 (as well as controllers 62, 72, and 82, described below), the functionality of the elements disclosed herein can be achieved by general purpose processors, special purpose processors, integrated circuits, ASICs configured or programmed to perform the disclosed functions. (Application Specific Integrated Circuits), conventional circuits, and/or combinations thereof, or processing circuits.
- a processor is considered a processing circuit or circuit because it includes transistors and other circuits.
- a circuit, unit, or means is hardware that performs or is programmed to perform the recited functions.
- the hardware may be the hardware disclosed herein, or other known hardware programmed or configured to perform the recited functions.
- a circuit, means or unit is a combination of hardware and software where the hardware is a processor which is considered a type of circuit, the software being used to configure the hardware and/or the processor.
- the land facility 6 includes a container 60 that stores the liquefied gas 9 , a liquid level sensor 61 that detects the liquid level in the container 60 , and a controller 62 that is electrically connected to the liquid level sensor 61 .
- the loading of the ship 5 may be carried out between the ship 5 and offshore facilities.
- vessel 5 may be loaded between vessel 5 and another vessel.
- the container 60 stores the liquefied gas 9B having the environmental value Xb.
- the environmental value Xb of the liquefied gas 9B may be the same as or different from the environmental value Xa of the liquefied gas 9A.
- the gas layer above the liquid surface of the liquefied gas 9B in the container 60 is filled with vaporized gas obtained by vaporizing the liquefied gas 9B.
- vessel 5 For initial loading of vessel 5, vessel 5 is moored to a quay near land facility 6 as shown in FIG. A liquid line 63 and a gas line 64 are connected.
- One end of the liquid pipeline 63 is a fixed pipe provided on the ship 5 and the other end is a fixed pipe provided on the land facility 6 .
- An intermediate portion of the liquid pipe line 63 is composed of a loading arm installed on the wharf.
- drawing of the liquid conduit 63 is omitted for simplification of the drawing.
- one end of the gas pipeline 64 is a fixed pipe provided on the ship 5 and the other end is a fixed pipe provided on the land facility 6 .
- An intermediate portion of the gas pipeline 64 is composed of a loading arm installed on the wharf.
- illustration of the gas pipeline 64 is omitted for simplification of the drawing.
- the liquid line 63 is drawn below the containers 2, 60 and the gas line 64 is drawn above the containers 2, 60 for simplification of the drawing.
- the actual route and opening position of the path 64 are appropriately determined.
- a dome may be provided at the top of the vessel 2 of the ship 5 and one end of the liquid line 63 and the gas line 64 may pass through the dome.
- the liquefied gas 9B is supplied from the container 60 of the land facility 6 to the container 2 of the ship 5 through the liquid pipeline 63, and the gas inside the container 2 is supplied through the gas pipeline 64. Vaporized gas is supplied from the air layer to the air layer in the container 60 .
- the controller 4 Before the liquefied gas 9B is supplied to the container 2, the controller 4 detects the liquid level height L1 detected by the liquid level sensor 31, the pressure P detected by the pressure sensor 32, and the temperature T detected by the temperature sensor 33. , the amount Ya of the previously supplied liquefied gas 9A remaining in the container 2 is determined, and the determined amount Ya of the liquefied gas 9A is recorded together with the environmental value Xa.
- the unit of the amount Ya is, for example, kg (the same applies to the amount Yb described later).
- the controller 4 adjusts the volume in the container 2 below the liquid level height L1 detected by the liquid level sensor 31. , the pressure P and the density of the liquefied gas 9 at the temperature T are multiplied to calculate the amount Ya of the liquefied gas 9A.
- the liquefied gas 9A is just the liquefied gas 9 identified by the environmental value X, so the density of the liquefied gas 9A is the same as the density of the liquefied gas 9. This point is the same for the liquefied gas 9B and the liquefied gases 9C and 9D described later.
- the controller 4 stores in advance a physical property table or relational expression indicating the relationship between the pressure and temperature and the density of the liquefied gas 9, and the controller 4 uses the physical property table or relational expression to determine the density of the liquefied gas 9. decide.
- the environmental value Xb of the liquefied gas 9B supplied to the container 2 is input to the controller 4 before, during or after loading.
- This input of the environmental value Xb may be performed by wireless communication from the controller 62 to the controller 4 when the environmental value Xb of the liquefied gas 9B is stored in advance in the controller 62, or may be electrically connected to the controller 4. It may also be done manually by an operator via a custom input device.
- the controller 4 controls the liquid level height L2 measured by the liquid level sensor 31, the pressure P detected by the pressure sensor 32, and the temperature T detected by the temperature sensor 33. Based on this, the amount Yb of the liquefied gas 9B supplied this time is determined, and the determined amount Yb of the liquefied gas 9B is recorded together with the environmental value Xb. Specifically, the controller 4 assigns the density of the liquefied gas 9 at pressure P and temperature T to the volume in the container 2 between the liquid level height L1 before loading and the liquid level height L2 after loading. By multiplying, the amount Yb of the liquefied gas 9B is calculated.
- the liquefied gas 9 remaining in the container 2 before the liquefied gas 9B is supplied is only the previously supplied liquefied gas 9A. Therefore, if the amount Ya of the liquefied gas 9A supplied last time and the environmental value Xa and the amount Yb of the liquefied gas 9B supplied this time and the environmental value Xb are recorded, the mixed liquefied gas can be obtained by referring to the data. Quantities Ya and Yb of 9A and 9B and environmental values Xa and Xb can be accurately grasped.
- the controller 4 After the liquefied gas 9B is supplied to the container 2, the controller 4 displays the amount Ya and the environmental value Xa of the previously supplied liquefied gas 9A and the amount Yb and environmental value Xb of the liquefied gas 9B supplied this time on the display 41. be displayed at the same time. Therefore, the amounts Ya, Yb of the mixed liquefied gases 9A, 9B and the environmental values Xa, Xb can be visually grasped.
- Figures 2A and 2B are diagrams for explaining the unloading from the vessel 5, where Figure 2A shows the state before unloading and Figure 2B shows the state after unloading.
- the land facility 7 includes a container 70 that stores the liquefied gas 9 , a liquid level sensor 71 that detects the liquid level in the container 70 , and a controller 72 that is electrically connected to the liquid level sensor 71 .
- unloading from the ship 5 may be carried out between the ship 5 and offshore facilities.
- unloading from vessel 5 may take place between vessel 5 and another vessel.
- the container 70 stores the liquefied gas 9C having the environmental value Xc.
- the environmental value Xc of the liquefied gas 9C may be the same as the environmental value Xa of the liquefied gas 9A or the environmental value Xb of the liquefied gas 9B. may be different from
- the gas layer above the liquid surface of the liquefied gas 9C in the container 70 is filled with vaporized gas obtained by vaporizing the liquefied gas 9C.
- One end of the liquid pipeline 73 is a fixed pipe provided on the ship 5 and the other end is a fixed pipe provided on the land facility 7 .
- An intermediate portion of the liquid pipe line 73 is composed of a loading arm installed on the wharf.
- drawing of the liquid conduit 73 is omitted for simplification of the drawing.
- one end of the gas pipeline 74 is a fixed pipe provided on the ship 5 and the other end is a fixed pipe provided on the land facility 7 .
- An intermediate portion of the gas pipeline 74 is composed of a loading arm installed on the quay. In FIG. 2A, illustration of the gas pipeline 74 is omitted for simplification of the drawing.
- liquid pipeline 73 is drawn below the containers 2 and 70 and the gas pipeline 74 is drawn above the containers 2 and 70 for simplification of the drawing.
- gas pipeline 74 is drawn above the containers 2 and 70 for simplification of the drawing.
- the actual routes and opening positions of liquid line 73 and gas line 74 are determined as appropriate.
- the liquefied gas 9 in which the liquefied gas 9A and the liquefied gas 9B are mixed is discharged from the container 2 of the ship 5 to the container 70 of the land facility 7 through the liquid pipeline 73.
- Vaporized gas is supplied from the gas layer in the container 70 to the gas layer in the container 2 through the gas pipeline 74 .
- the controller 4 detects the liquid level height L3 detected by the liquid level sensor 31, the pressure P detected by the pressure sensor 32, and the temperature T detected by the temperature sensor 33 before the liquefied gas 9 in the container 2 is discharged. Based on, determine the amounts Ya1, Yb1 of the liquefied gases 9A, 9B supplied at least two times in the container 2, and determine the determined amounts Ya1, Yb1 of the liquefied gases 9A, 9B as environmental values Xa, Xb Record with Specifically, the controller 4 multiplies the volume in the container 2 below the liquid level height L3 detected by the liquid level sensor 31 by the density of the liquefied gas 9 at pressure P and temperature T to obtain the liquefied gas 9 of the liquefied gases 9A and 9B by multiplying the total amount Y by the ratio (Ya/(Ya+Yb) and Yb/(Ya+Yb)) of the amounts Ya and Yb recorded after the last supply of the liquefied gas. Quantities Ya1 and Yb1
- the liquefied gas 9A, 9B supplied the most recent two times. Therefore, if the amounts Ya1, Yb1 and the environmental values Xa, Xb of the liquefied gases 9A, 9B supplied at least two times most recently before the liquefied gas 9 is delivered are recorded, the data are recorded after the last supply of the liquefied gas. By comparing with the obtained data, the amount of the liquefied gas 9 consumed as boil-off gas before the liquefied gas 9 is discharged and the environmental value can be grasped.
- the controller 4 After the liquefied gas 9 in the container 2 is discharged, the controller 4 detects the liquid level height L4 detected by the liquid level sensor 31, the pressure P detected by the pressure sensor 32, and the temperature detected by the temperature sensor 33. Based on T, the amounts Ya2 and Yb2 of the liquefied gases 9A and 9B that have been supplied at least two times in the container 2 are determined respectively, and the determined amounts Ya2 and Yb2 of the liquefied gases 9A and 9B are used as the environmental values Xa , Xb.
- the controller 4 multiplies the volume in the container 2 below the liquid level height L4 detected by the liquid level sensor 31 by the density of the liquefied gas 9 at pressure P and temperature T to obtain the liquefied gas 9 of the liquefied gases 9A and 9B by multiplying the total amount Y by the ratio (Ya/(Ya+Yb) and Yb/(Ya+Yb)) of the amounts Ya and Yb recorded after the last supply of the liquefied gas. Quantities Ya2 and Yb2 are calculated.
- the controller 4 displays the amounts Ya2, Yb2 of the liquefied gas 9A, 9B that have been supplied at least two times and the environmental values Xa, Xb remaining in the container 2. are displayed on the device 41 at the same time. Therefore, it is possible to visually grasp the amounts Ya2, Yb2 of the liquefied gases 9A, 9B supplied at least two times and the environmental values Xa, Xb remaining in the container 2 .
- the environmental value Xg of the vaporized gas supplied to the gas layer in the container 2 is input to the controller 4 .
- This input of the environmental value Xg may be performed by wireless communication from the controller 72 to the controller 4 when the environmental value Xg of the vaporized gas is stored in advance in the controller 72, or may be electrically connected to the controller 4. It may also be done manually by an operator via an input device.
- the environmental value Xg of the vaporized gas supplied to the gas layer in the container 2 is It is the same as the environmental value Xc of 9C.
- the environmental value Xg of the vaporized gas supplied from the container 60 to the container 2 is calculated based on the mixing ratio of the liquefied gases.
- the controller 4 After the liquefied gas 9 in the container 2 is discharged, the controller 4 records the amount Yg of the vaporized gas supplied to the gas layer in the container 2 together with the environmental value Xg. Thereby, not only the amount and environmental value of the liquefied gas 9 but also the amount and environmental value of the vaporized gas can be managed.
- the amount Yg of the vaporized gas supplied to the air layer inside the container 2 can be calculated, for example, by integrating the flow rate of the vaporized gas flowing through the gas pipeline 74 .
- the volume in the container 2 between the liquid level height L3 before unloading and the liquid level height L4 after unloading is filled with the pressure P detected by the pressure sensor 32 and the temperature T detected by the temperature sensor 33.
- the amount Yg of the vaporized gas may be calculated by multiplying the density of the vaporized gas.
- Figures 3A and 3B are diagrams for explaining the second loading of the ship 5, with Figure 3A showing the state before loading and Figure 3B showing the state after loading.
- the ship 5 is loaded for the second time between the ship 5 and the land facility 8 .
- the land facility 8 includes a container 80 that stores the liquefied gas 9 , a liquid level sensor 81 that detects the liquid level in the container 80 , and a controller 82 that is electrically connected to the liquid level sensor 81 .
- the land facility 8 may be the same as or different from the land facility 6 on which the initial loading was performed.
- the loading of the ship 5 may be carried out between the ship 5 and offshore facilities.
- vessel 5 may be loaded between vessel 5 and another vessel.
- the container 80 stores the liquefied gas 9D having the environmental value Xd.
- the environmental value Xd of the liquefied gas 9D may be the same as the environmental value Xa of the liquefied gas 9A, the environmental value Xb of the liquefied gas 9B, or the environmental value Xc of the liquefied gas 9C, or the environmental value Xa of the liquefied gas 9A. and the environmental value Xb of the liquefied gas 9B and the environmental value Xc of the liquefied gas 9C.
- the gas layer above the liquid level of the liquefied gas 9D in the container 80 is filled with vaporized gas obtained by vaporizing the liquefied gas 9D.
- One end of the liquid pipeline 83 is a fixed pipe provided on the ship 5 and the other end is a fixed pipe provided on the land facility 8 .
- An intermediate portion of the liquid pipe 83 is composed of a loading arm installed on the wharf.
- drawing of the liquid conduit 83 is omitted for simplification of the drawing.
- one end of the gas pipeline 84 is a fixed pipe provided on the ship 5 and the other end is a fixed pipe provided on the land facility 8 .
- An intermediate portion of the gas pipeline 84 is composed of a loading arm installed on the wharf.
- illustration of the gas pipeline 84 is omitted for simplification of the drawing.
- liquid pipeline 83 is drawn below the containers 2 and 80 and the gas pipeline 84 is drawn above the containers 2 and 80 for simplification of the drawing.
- the actual routes and opening positions of liquid line 83 and gas line 84 are determined as appropriate.
- the liquefied gas 9D is supplied from the container 80 of the land facility 8 to the container 2 of the ship 5 through the liquid pipeline 83, and the gas inside the container 2 is supplied through the gas pipeline 84.
- Vaporized gas is supplied from the air layer to the air layer in the container 80 .
- the controller 4 Before the liquefied gas 9D is supplied to the container 2, the controller 4 detects the liquid level height L5 detected by the liquid level sensor 31, the pressure P detected by the pressure sensor 32, and the temperature T detected by the temperature sensor 33. , the amount Yb3 of the previously supplied liquefied gas 9B remaining in the container 2 is determined, and the determined amount Yb3 of the liquefied gas 9B is recorded together with the environmental value Xb.
- the controller 4 multiplies the volume of the container 2 below the liquid level height L5 detected by the liquid level sensor 31 by the density of the liquefied gas 9 at pressure P and temperature T to obtain the liquefied gas 9 is calculated, and the total amount Y is multiplied by the ratio (Yb/(Ya+Yb)) of the amount Yb recorded after the previous liquefied gas supply to calculate the amount Yb3 of the liquefied gas 9B.
- the environmental value Xd of the liquefied gas 9D supplied to the container 2 is input to the controller 4 before, during or after loading.
- This input of the environmental value Xd may be performed by wireless communication from the controller 82 to the controller 4 when the environmental value Xd of the liquefied gas 9D is stored in advance in the controller 82, or may be electrically connected to the controller 4. It may also be done manually by an operator via a custom input device.
- the controller 4 controls the liquid level height L6 measured by the liquid level sensor 31, the pressure P detected by the pressure sensor 32, and the temperature T detected by the temperature sensor 33. Based on this, the amount Yd of the liquefied gas 9D supplied this time is determined, and the determined amount Yd of the liquefied gas 9D is recorded together with the environmental value Xd. Specifically, the controller 4 assigns the density of the liquefied gas 9 at pressure P and temperature T to the volume in the container 2 between the liquid level height L5 before loading and the liquid level height L6 after loading. By multiplying, the amount Yd of the liquefied gas 9D is calculated.
- the liquefied gas 9 remaining in the container 2 before the liquefied gas 9D is supplied contains a large amount of the previously supplied liquefied gas 9B. Therefore, if the amount Yb3 of the liquefied gas 9B supplied last time and the environmental value Xb and the amount Yd of the liquefied gas 9D supplied this time and the environmental value Xd are recorded, the mixed liquefied gas can be obtained by referring to the data. Quantities Yb3 and Yd of 9B and 9D and environmental values Xb and Xd can be accurately grasped. Moreover, the mixing history of the liquefied gas 9 can be tracked by referring to past data.
- the controller 4 detects the liquid level height detected by the liquid level sensor 31 Based on (L1, L2, L5 or L6) alone, determine the amount of previously supplied liquefied gas (9A or 9B) remaining in container 2 before liquefied gas 9 is supplied, and After the liquefied gas is supplied, the amount of liquefied gas (9B or 9D) supplied this time may be determined.
- the controller 4 detects the liquid level (L3 or L4) detected by the liquid level sensor 31, and determines whether the container 2 is discharged before the liquefied gas is discharged.
- the amount of the liquefied gas 9A, 9B supplied at least two times in the container 2 and supply the amount of the liquefied gas 9A, 9B remaining in the container 2 at least the last two times after the liquefied gas 9 in the container 2 has been discharged.
- the amount of liquefied gas 9A, 9B dispensed may be determined.
- the amount of liquefied gas is based on not only the liquid level detected by the liquid level sensor 31 but also the pressure P detected by the pressure sensor 32 and the temperature T detected by the temperature sensor 33 as in the above embodiment. is determined, the amount of liquefied gas can be accurately determined.
- the present disclosure provides a container for storing liquefied gas obtained by liquefying a single-component gas, a liquid level sensor for detecting the height of the liquid level in the container, and the liquefied gas supplied to the container every time the gas is supplied. and a controller to which the environmental value of the liquefied gas is input, wherein the controller controls the level of liquid in the container based on the liquid level detected by the liquid level sensor before the liquefied gas is supplied to the container.
- the amount of the remaining liquefied gas supplied last time is determined and recorded together with the environmental value, and is supplied this time based on the liquid level detected by the liquid level sensor after the liquefied gas is supplied to the container.
- a liquefied gas monitoring system is provided for determining and recording the amount of liquefied gas collected along with said environmental value.
- the liquefied gas remaining in the container before the liquefied gas is supplied contains a large amount of the previously supplied liquefied gas. Therefore, if the amount and environmental value of the liquefied gas supplied last time and the amount and environmental value of the liquefied gas supplied this time are recorded, the amount and environmental value of the mixed liquefied gas can be calculated by referring to the data. can be accurately grasped. Moreover, by referring to past data, it is possible to track the mixing history of the liquefied gas.
- the above liquefied gas monitoring system includes a pressure sensor that detects the pressure of the gas layer in the container, and a temperature sensor that detects the temperature of the gas layer or the liquefied gas in the container, and the controller detects the liquid Based on not only the liquid level detected by the surface sensor but also the pressure detected by the pressure sensor and the temperature detected by the temperature sensor, the liquefied gas remains in the container before the liquefied gas is supplied.
- the amount of liquefied gas supplied last time may be determined, and after the liquefied gas is supplied to the container, the amount of liquefied gas supplied this time may be determined. With this configuration, the amount of liquefied gas can be determined accurately.
- the controller may simultaneously display the amount and environmental value of the previously supplied liquefied gas and the amount and environmental value of the liquefied gas supplied this time on the display. According to this configuration, it is possible to visually grasp the amount of mixed liquefied gas and the environmental value.
- the controller measures the amount of the liquefied gas in the container that has been supplied at least twice most recently based on the liquid level detected by the liquid level sensor before the liquefied gas in the container is discharged. Each is determined and recorded together with the environmental value, and after the liquefied gas in the container is discharged, at least the two most recent times remaining in the container based on the liquid level height detected by the liquid level sensor Each amount of liquefied gas supplied may be determined and recorded together with the environmental value. Most of the liquefied gas present in the container before the liquefied gas is dispensed is the liquefied gas that has been supplied the last two times.
- the data can be compared with the data recorded after the last supply of liquefied gas to It is possible to grasp the amount of liquefied gas consumed as boil-off gas and the environmental value before the gas is paid out. Moreover, even after the liquefied gas is discharged, the amount of liquefied gas supplied at least two times most recently and the environmental value are recorded. The amount of gas and the environmental value can be grasped.
- a pressure sensor that detects the pressure of the gas layer in the container, and a temperature sensor that detects the temperature of the gas layer or liquefied gas in the container, wherein the controller detects the liquid level detected by the liquid level sensor Based on not only the height but also the pressure detected by the pressure sensor and the temperature detected by the temperature sensor, the liquefied gas in the container has been in at least the last two times before being discharged.
- An amount of liquefied gas supplied may be determined, and an amount of at least two most recently supplied liquefied gas remaining in the container after the liquefied gas in the container has been dispensed. With this configuration, the amount of liquefied gas can be determined accurately.
- the controller may cause the indicator to simultaneously display the amount of the liquefied gas that has been supplied in at least the two most recent times and the environmental value remaining in the container. According to this configuration, it is possible to visually grasp the amount of the liquefied gas that has been supplied in the last two times and the environmental value remaining in the container.
- the vaporized gas is supplied to the gas layer in the container, and the environmental value of the vaporized gas is input to the controller, and the controller controls the liquefaction in the container. After the gas is dispensed, the amount of vaporized gas supplied to the atmosphere within the vessel may be recorded together with the environmental value. According to this configuration, not only the amount and environmental value of liquefied gas but also the amount and environmental value of vaporized gas can be managed.
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Abstract
Description
本開示は上述した実施形態に限定されるものではなく、本開示の要旨を逸脱しない範囲で種々の変形が可能である。
本開示は、単一成分のガスを液化した液化ガスを貯留する容器と、前記容器内の液面高さを検出する液面センサと、前記容器に液化ガスが供給されるたびに供給された液化ガスの環境価値が入力されるコントローラと、を備え、前記コントローラは、前記容器に液化ガスが供給される前に、前記液面センサで検出される液面高さに基づいて前記容器内に残存する前回供給された液化ガスの量を決定して前記環境価値と共に記録し、前記容器に液化ガスが供給された後に、前記液面センサで検出される液面高さに基づいて今回供給された液化ガスの量を決定して前記環境価値と共に記録する、液化ガス監視システムを提供する。
Claims (7)
- 単一成分のガスを液化した液化ガスを貯留する容器と、
前記容器内の液面高さを検出する液面センサと、
前記容器に液化ガスが供給されるたびに供給された液化ガスの環境価値が入力されるコントローラと、を備え、
前記コントローラは、
前記容器に液化ガスが供給される前に、前記液面センサで検出される液面高さに基づいて前記容器内に残存する前回供給された液化ガスの量を決定して前記環境価値と共に記録し、
前記容器に液化ガスが供給された後に、前記液面センサで検出される液面高さに基づいて今回供給された液化ガスの量を決定して前記環境価値と共に記録する、液化ガス監視システム。 - 前記容器内の気層の圧力を検出する圧力センサと、
前記容器内の気層または液化ガスの温度を検出する温度センサと、を備え、
前記コントローラは、前記液面センサで検出される液面高さだけでなく前記圧力センサで検出される圧力および前記温度センサで検出される温度にも基づいて、前記液化ガスが供給される前には前記容器内に残存する前回供給された液化ガスの量を決定し、前記容器に液化ガスが供給された後には今回供給された液化ガスの量を決定する、請求項1に記載の液化ガス監視システム。 - 前記コントローラは、前記容器に液化ガスが供給された後に、前回供給された液化ガスの量および環境価値と、今回供給された液化ガスの量および環境価値を表示器に同時に表示させる、請求項1または2に記載の液化ガス監視システム。
- 前記コントローラは、
前記容器内の液化ガスが払い出される前に、前記液面センサで検出される液面高さに基づいて前記容器内に在る少なくとも直近二回に供給された液化ガスの量をそれぞれ決定して前記環境価値と共に記録し、
前記容器内の液化ガスが払い出された後に、前記液面センサで検出される液面高さに基づいて前記容器内に残存する少なくとも直近二回に供給された液化ガスの量をそれぞれ決定して前記環境価値と共に記録する、請求項1~3の何れか一項に記載の液化ガス監視システム。 - 前記容器内の気層の圧力を検出する圧力センサと、
前記容器内の気層または液化ガスの温度を検出する温度センサと、を備え、
前記コントローラは、前記液面センサで検出される液面高さだけでなく前記圧力センサで検出される圧力および前記温度センサで検出される温度にも基づいて、前記容器内の液化ガスが払い出される前には前記容器内に在る少なくとも直近二回に供給された液化ガスの量を決定し、前記容器内の液化ガスが払い出された後には前記容器内に残存する少なくとも直近二回に供給された液化ガスの量を決定する、請求項4に記載の液化ガス監視システム。 - 前記コントローラは、前記容器内の液化ガスが払い出された後に、前記容器内に残存する少なくとも直近二回に供給された液化ガスの量および環境価値を表示器に同時に表示させる、請求項4または5に記載の液化ガス監視システム。
- 前記容器内の液化ガスが払い出される際には、前記容器内の気層に気化ガスが供給されるとともに、前記気化ガスの環境価値が前記コントローラに入力され、
前記コントローラは、前記容器内の液化ガスが払い出された後に、前記容器内の気層に供給された気化ガスの量を前記環境価値と共に記録する、請求項1~6の何れか一項に記載の液化ガス監視システム。
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JP2002297697A (ja) * | 2001-03-28 | 2002-10-11 | Toshiba Corp | 製品の環境負荷評価方法およびプログラム |
JP2003130296A (ja) * | 2001-10-29 | 2003-05-08 | Osaka Gas Co Ltd | Lng管理システム及びその課金システム |
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