WO2013172641A1 - 액화가스 처리 시스템 및 방법 - Google Patents
액화가스 처리 시스템 및 방법 Download PDFInfo
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- WO2013172641A1 WO2013172641A1 PCT/KR2013/004281 KR2013004281W WO2013172641A1 WO 2013172641 A1 WO2013172641 A1 WO 2013172641A1 KR 2013004281 W KR2013004281 W KR 2013004281W WO 2013172641 A1 WO2013172641 A1 WO 2013172641A1
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- WIPO (PCT)
- Prior art keywords
- liquefied gas
- heat
- heat transfer
- medium
- transfer medium
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/06—Apparatus for de-liquefying, e.g. by heating
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- 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
- F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
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- 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
- F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
- F17C9/02—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure with change of state, e.g. vaporisation
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- 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
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/03—Mixtures
- F17C2221/032—Hydrocarbons
- F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
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- 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
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/03—Mixtures
- F17C2221/032—Hydrocarbons
- F17C2221/035—Propane butane, e.g. LPG, GPL
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- 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
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0146—Two-phase
- F17C2223/0153—Liquefied gas, e.g. LPG, GPL
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- 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
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0146—Two-phase
- F17C2223/0153—Liquefied gas, e.g. LPG, GPL
- F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
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- 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
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
- F17C2223/033—Small pressure, e.g. for liquefied gas
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- 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
- F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
- F17C2225/03—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the pressure level
- F17C2225/035—High pressure, i.e. between 10 and 80 bars
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- 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
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/01—Propulsion of the fluid
- F17C2227/0128—Propulsion of the fluid with pumps or compressors
- F17C2227/0135—Pumps
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- 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
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/03—Heat exchange with the fluid
- F17C2227/0302—Heat exchange with the fluid by heating
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- 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
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/03—Heat exchange with the fluid
- F17C2227/0302—Heat exchange with the fluid by heating
- F17C2227/0309—Heat exchange with the fluid by heating using another fluid
- F17C2227/0323—Heat exchange with the fluid by heating using another fluid in a closed loop
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- 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
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/04—Indicating or measuring of parameters as input values
- F17C2250/0404—Parameters indicated or measured
- F17C2250/0439—Temperature
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- 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
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/06—Controlling or regulating of parameters as output values
- F17C2250/0605—Parameters
- F17C2250/0631—Temperature
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- 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
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/06—Controlling or regulating of parameters as output values
- F17C2250/0605—Parameters
- F17C2250/0636—Flow or movement of content
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- 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
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/06—Controlling or regulating of parameters as output values
- F17C2250/0689—Methods for controlling or regulating
- F17C2250/0694—Methods for controlling or regulating with calculations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Definitions
- the present invention relates to a liquefied gas treatment system and method.
- Liquefied natural gas is liquefied by cooling methane obtained by refining natural gas collected from a gas field. It is a colorless and transparent liquid.
- Liquefied petroleum gas is a liquid fuel made by compressing a gas mainly composed of propane (C3H8) and butane (C4H10), which come with oil from an oil field, at room temperature.
- Liquefied petroleum gas like liquefied natural gas, is colorless and odorless and is widely used as a fuel for household, business, industrial, and automobile use.
- Such liquefied gas is stored in a liquefied gas storage tank installed on the ground or in a liquefied gas storage tank provided in a ship which is a means of transporting the ocean, and liquefied natural gas is liquefied to a volume of 1/600.
- the liquefied petroleum gas is reduced by the liquefied propane is 1/260, butane is reduced to a volume of 1/230 has the advantage of high storage efficiency.
- the temperature and pressure of the liquefied gas required by the customer such as the engine may be different from the state of the liquefied gas stored in the liquefied gas storage tank. Therefore, in recent years, continuous research and development has been made regarding a technology for controlling the temperature and pressure of a liquefied gas stored in a liquid state and supplying it to a demand destination.
- the present invention was created to solve the problems of the prior art as described above, and an object of the present invention is to calculate the required amount of heat by measuring the flow rate and temperature of the liquefied gas flowing into the heat exchanger, and based on the calculated amount of heat transfer medium It is to provide a liquefied gas treatment system and method capable of efficiently matching liquefied gas to a demanded temperature of a demand by performing feed forward control of appropriate heating.
- an object of the present invention by controlling the driving of the medium pump in accordance with the required heat amount of the heat transfer medium to vary the inflow of the medium heater, or by adjusting the amount of heat source supplied to the heat transfer medium from the medium heater, heat transfer To provide a liquefied gas treatment system and method that can easily control the required amount of heat of the medium.
- the liquefied gas processing system connected to the demand destination from the liquefied gas storage tank;
- a pump provided on the liquefied gas supply line to pressurize the liquefied gas discharged from the liquefied gas storage tank;
- a heat exchanger provided on the liquefied gas supply line between the demand source and the pump and heat-exchanging liquefied gas supplied from the pump with a heat transfer medium;
- a medium circulation line connected from said medium heater to said heat exchanger;
- a controller configured to vary the flow rate of the heat transfer medium or the amount of heat supplied by the medium heater to the heat transfer medium based on the flow rate of the liquefied gas supplied to the heat exchanger.
- the apparatus further includes a calorific calculator for calculating a flow rate of the liquefied gas supplied to the heat exchanger and calculating a required heat amount of the heat transfer medium based on the flow rate of the liquefied gas and the state of the liquefied gas required by the demand source.
- the controller may receive the required amount of heat of the heat transfer medium from the calorimeter, and change the flow rate of the heat transfer medium introduced into the medium heater or the amount of heat supplied by the medium heater to the heat transfer medium. have.
- the calorific value calculator may calculate the flow rate of the liquefied gas through the driving degree of the pump.
- the driving degree of the pump may be RPM of the pump.
- the liquefied gas temperature sensor is provided on the liquefied gas supply line for measuring the temperature of the liquefied gas, the calorific value calculator, the flow rate of the liquefied gas, the temperature of the liquefied gas, the liquefaction of the demand destination
- the required heat amount of the heat transfer medium may be calculated using the gas demand temperature.
- the liquefied gas temperature sensor may be provided between the pump and the heat exchanger on the liquefied gas supply line.
- the heat transfer medium further comprises a branching line branched from the medium circulation line to bypass the medium heater, the controller, the branching line through the bypass control valve provided on the branching line
- the flow rate of the heat transfer medium introduced into it can be adjusted.
- the medium tank for storing the heat transfer medium; And a medium pump supplying the heat transfer medium stored in the medium tank to the medium heater, wherein the controller controls the driving of the medium pump to supply the heat transfer medium from the medium pump to the medium heater.
- the flow rate of can be controlled.
- a heat source supply line for supplying a heat source to the medium heater; And a heat source supply valve provided on the heat source supply line to adjust an opening degree of the heat source supply line, wherein the controller controls the opening degree of the heat source supply valve to control the opening degree of the heat source supply valve. You can control the amount.
- the heat transfer medium may be glycol water.
- the liquefied gas is pressurized by a pump and heated in a heat exchanger to a heat transfer medium to be supplied to a demand destination, and the medium heater heats the heat transfer medium to supply the heat exchanger to the heat exchanger.
- a method of driving a treatment system comprising: calculating a flow rate of liquefied gas supplied to the heat exchanger; And varying the flow rate of the heat transfer medium introduced into the medium heater or the amount of heat supplied by the medium heater to the heat transfer medium according to the flow rate of the liquefied gas.
- the method further includes calculating a required amount of heat of the heat transfer medium to be supplied to the heat exchanger on the basis of the state of the liquefied gas required by the customer, and varying the flow rate of the heat transfer medium or the amount of heat supplied to the heat transfer medium.
- the flow rate of the heat transfer medium flowing into the medium heater or the amount of heat supplied by the medium heater to the heat transfer medium may be varied according to the required heat amount of the heat transfer medium.
- the calculating of the flow rate of the liquefied gas may calculate the flow rate through the driving degree of the pump.
- the driving degree of the pump may be RPM of the pump.
- the temperature of the liquefied gas between the pump and the heat exchanger may be measured.
- varying the flow rate of the heat transfer medium may include controlling at least a portion of the heat transfer medium to bypass the medium heater and controlling the flow rate of the heat transfer medium bypassing the medium heater.
- varying the flow rate of the heat transfer medium may include controlling the driving of a medium pump for supplying the heat transfer medium to the medium heater.
- varying the flow rate of the heat transfer medium may include controlling the amount of heat source supplied to the heat transfer medium introduced into the medium heater.
- the liquefied gas treatment system and method according to the present invention calculates the amount of heat required to be heated to the required temperature of the demand destination through the liquefied gas flow rate and temperature before entering the heat exchanger, and the heating of the heat transfer medium through the calculated heat amount.
- the liquefied gas processing system and method according to the present invention by measuring the temperature of the liquefied gas flowing into the heat exchanger with a liquefied gas temperature sensor, after grasping the flow rate of the liquefied gas through the RPM of the pump, the flow rate and temperature of the liquefied gas Through calculating the required amount of heat through, the temperature of the liquefied gas can be efficiently controlled by adjusting the flow rate of the heat transfer medium flowing into the medium heater or by adjusting the amount of heat source supplied to the heat transfer medium.
- FIG. 1 is a conceptual diagram of a conventional liquefied gas treatment system.
- FIG. 2 is a conceptual diagram of a liquefied gas treatment system according to an embodiment of the present invention.
- FIG. 3 is a flow chart of a liquefied gas treatment method according to an embodiment of the present invention.
- step S40 of the liquefied gas treatment method is a detailed flowchart of step S40 of the liquefied gas treatment method according to an embodiment of the present invention.
- FIG. 1 is a conceptual diagram of a conventional liquefied gas treatment system.
- the conventional liquefied gas treatment system 1 includes a liquefied gas storage tank 10, a demand destination 20, a pump 30, and an electric heater 40.
- liquefied gas may be used to encompass all gaseous fuels which are generally stored in a liquid state, such as LNG or LPG, ethylene, ammonia, and the like. Can be expressed as This can be applied to the boil off gas as well.
- the liquefied gas when supplying liquefied gas to the demand destination 20 such as an engine, the liquefied gas is heated to the temperature required by the demand destination 20 by using the electric heater 40.
- the temperature of the liquefied gas moving from the downstream of the electric heater 40 to the demand destination 20 was measured in order to confirm whether or not it was heated up to the required temperature of the demand destination 20.
- the heating amount of the electric heater 40 is changed by measuring the temperature of the liquefied gas downstream of the electric heater 40, the liquefied gas is supplied to the demand destination 20 at an unsuitable temperature and the demand destination ( There is a fear that the operational efficiency of 20) may be lowered.
- FIG. 2 is a conceptual diagram of a liquefied gas treatment system according to an embodiment of the present invention.
- the liquefied gas treatment system 2 includes a liquefied gas storage tank 10, a customer 20, a pump 30, a heat exchanger 50, and a medium. And a supply device 60, a liquefied gas temperature sensor 70, a calorific value calculator 80, and a controller 90.
- the liquefied gas storage tank 10, the customer 20, the pump 30 and the like use the same reference numerals for convenience of each configuration and convenience in the conventional liquefied gas treatment system 1, but the same It does not refer to a configuration.
- the liquefied gas storage tank 10 stores the liquefied gas to be supplied to the demand destination 20.
- the liquefied gas storage tank 10 should store the liquefied gas in a liquid state, where the liquefied gas storage tank 10 may have a pressure tank form.
- the liquefied gas storage tank 10 includes an outer tank (not shown), an inner tank (not shown), and a heat insulating part.
- the outer tank is a structure forming the outer wall of the liquefied gas storage tank 10, it may be formed of steel, the cross section may be a polygonal shape.
- the inner tank is provided inside the outer tank, and may be supported and installed inside the outer tank by a support (not shown).
- the support may be provided at the lower end of the inner tank, and of course, may be provided at the side of the inner tank to suppress the left and right flow of the inner tank.
- the inner tank may be formed of a stainless material, and may be designed to withstand a pressure of 5 bar to 10 bar (for example, 6 bar).
- the inner tank is designed to withstand a certain pressure, because the internal pressure of the inner tank can be increased as the liquefied gas provided in the inner tank is evaporated to generate the evaporated gas.
- a baffle (not shown) may be provided inside the inner tank.
- the baffle refers to a lattice-shaped plate, and as the baffle is installed, the pressure inside the inner tank may be evenly distributed to prevent the inner tank from being concentrated at a portion.
- the heat insulating part may be provided between the inner tank and the outer tank, and may block external heat energy from being transferred to the inner tank.
- the thermal insulation unit may be in a vacuum state.
- the present embodiment uses a pressure tank-type liquefied gas storage tank 10 having a vacuum insulator between the outer tank and the inner tank, thereby minimizing the generation of boil-off gas, even if the internal pressure rises. It is possible to prevent a problem such as breakage of the storage tank 10 in advance.
- the demand destination 20 receives the liquefied gas from the liquefied gas storage tank 10.
- the customer 20 may be an engine driven through liquefied gas to generate power, and may be, for example, a MEGI engine or a dual fuel engine mounted on a ship.
- LNG or oil may be selectively supplied without being mixed with LNG, which is a liquefied gas, and oil. This is to prevent the two materials having different combustion temperatures from being mixed and supplied, thereby preventing the efficiency from dropping.
- crank shaft (not shown) connected to the piston As the engine reciprocates the piston (not shown) inside the cylinder (not shown) by combustion of the liquefied gas, a crank shaft (not shown) connected to the piston is rotated, and a shaft (not shown) is connected to the crank shaft. May not be rotated. Accordingly, as the propeller (not shown) finally connected to the shaft rotates when the engine is driven, the hull moves forward or backward.
- the engine as the demand source 20 may be an engine for driving the propeller, but may be an engine for power generation or an engine for generating other power. That is, this embodiment does not specifically limit the kind of engine.
- the engine may be an internal combustion engine generating a driving force by combustion of liquefied gas.
- a liquefied gas supply line 21 may be installed between the liquefied gas storage tank 10 and the demand destination 20.
- the liquefied gas supply line 21 may include a pump 30 and a heat exchanger 50. Etc. may be provided so that the liquefied gas is supplied to the demand destination 20.
- the liquefied gas supply line 21 is provided with a liquefied gas supply valve (not shown), the supply amount of the liquefied gas according to the opening degree of the liquefied gas supply valve can be adjusted.
- the liquefied gas supply line 21 is provided with a liquefied gas temperature sensor 70, to grasp the required heat amount of the heat transfer medium for supplying heat to the liquefied gas in accordance with the temperature of the liquefied gas, through the medium heater 63
- the temperature of the heated heat transfer medium can be adjusted appropriately. This will be described later.
- the pump 30 is provided on the liquefied gas supply line 21 and pressurizes the liquefied gas discharged from the liquefied gas storage tank 10.
- the pump 30 may include a boosting pump 31 and a high pressure pump 32.
- the boosting pump 31 may be provided on the liquefied gas supply line 21 between the liquefied gas storage tank 10 and the high pressure pump 32 or in the liquefied gas storage tank 10, and the high pressure pump 32 By supplying a sufficient amount of liquefied gas to the) to prevent the cavitation (cavitation) of the high pressure pump (32).
- the boosting pump 31 may extract the liquefied gas from the liquefied gas storage tank 10 to pressurize the liquefied gas within several to several tens of bar, and the liquefied gas passed through the boosting pump 31 may be pressurized to 1 bar to 25 bar. have.
- the liquefied gas stored in the liquefied gas storage tank 10 is in a liquid state.
- the boosting pump 31 may pressurize the liquefied gas discharged from the liquefied gas storage tank 10 to increase the pressure and temperature to some extent, and the liquefied gas pressurized by the boosting pump 31 may still be in a liquid state.
- the high pressure pump 32 pressurizes the liquefied gas discharged from the boosting pump 31 to high pressure so that the liquefied gas is supplied to the demand destination 20.
- the liquefied gas is discharged at a pressure of about 10 bar from the liquefied gas storage tank 10 and then pressurized primarily by the boosting pump 31, and the high pressure pump 32 is in a liquid state pressurized by the boosting pump 31.
- the liquefied gas is secondarily pressurized and supplied to a heat exchanger 50 to be described later.
- the high pressure pump 32 pressurizes the liquefied gas to the demand destination 20, for example, 200 bar to 400 bar, and supplies the demand destination 20 to the demand destination 20 so as to produce power and the like through the liquefied gas. can do.
- the high pressure pump 32 pressurizes the liquid liquefied gas discharged from the boosting pump 31 to a high pressure, but changes the phase so that the liquefied gas becomes a supercritical state having a temperature higher than the critical point and a high pressure. You can.
- the temperature of the liquefied gas in the supercritical state may be -20 degrees or less, which is relatively higher than the critical temperature.
- the high pressure pump 32 may pressurize the liquefied gas in a liquid state to a high pressure to change it into a supercooled liquid state.
- the liquefied gas in the subcooled liquid state is a state in which the pressure of the liquefied gas is higher than the critical pressure and the temperature is lower than the critical temperature.
- the high pressure pump 32 pressurizes the liquid liquefied gas discharged from the boosting pump 31 to 200 bar to 400 bar at a high pressure, so that the temperature of the liquefied gas becomes a temperature lower than the critical temperature, thereby supercooling the liquefied gas. Phase change to liquid state.
- the temperature of the liquefied gas in the subcooled liquid state may be -140 degrees to -60 degrees, which is relatively lower than the critical temperature.
- the high pressure pump 32 may be omitted when the demand source 20 is a low pressure engine. That is, when the demand source 20 is a dual fuel engine that is a low pressure engine, the liquefied gas may be supplied to the demand source 20 through the heat exchanger 50 to be described later after being pressurized by the boosting pump 31.
- the heat exchanger 50 is provided on the liquefied gas supply line 21 between the demand source 20 and the pump 30 and heat-exchanges the liquefied gas supplied from the pump 30 with the heat transfer medium.
- the pump 30 for supplying the liquefied gas to the heat exchanger 50 may be a high pressure pump 32.
- the heat exchanger 50 may discharge the liquefied gas in a supercooled liquid state or a supercritical state from the high pressure pump 32. By heating while maintaining the pressure of 200bar to 400bar, it can be converted to the liquefied gas of the supercritical state of 30 degrees to 60 degrees and then supplied to the demand destination 20.
- the heat exchanger 50 in this embodiment can heat the liquefied gas using a heat transfer medium supplied from the media heater 63 to be described later.
- the heat transfer medium may be glycol water, and glycol water is a fluid mixed with ethylene glycol (Ethylene Glycol) and water, and is heated in the medium heater 63 and cooled in the heat exchanger 50 to provide a medium circulation line ( 64).
- the temperature of the heat transfer medium discharged after the heat exchange with the liquefied gas in the heat exchanger 50 may vary according to the liquefied gas phase change of the high pressure pump 32 mentioned above. That is, when the high pressure pump 32 changes the liquefied gas into a supercooled liquid state and then supplies it to the heat exchanger 50, the heat transfer medium can be cooled while heating the liquefied gas in the supercooled liquid state to 30 degrees to 60 degrees. Alternatively, when the high pressure pump 32 changes the liquefied gas into a supercritical state and supplies it to the heat exchanger 50, the heat transfer medium demands the liquefied gas having a higher temperature than the supercooled liquid state. It can be cooled while heating to the required temperature of.
- the heat transfer medium in the case of heat exchange with the liquefied gas in the subcooled liquid state after being cooled to a lower temperature than the heat transfer medium in the case of heat exchange with the liquefied gas in the supercritical state may be circulated to the medium tank (61).
- the temperature or flow rate of the heat transfer medium supplied to the heat exchanger 50 may be changed through the controller 90 to be described later according to the flow rate, temperature, etc. of the liquefied gas measured at the front end of the heat exchanger 50.
- the present embodiment does not change the heating degree of the liquefied gas according to the temperature of the liquefied gas at the rear end of the heat exchanger 50, but by varying the amount of heat to be supplied to the liquefied gas according to the liquefied gas state at the front end of the heat exchanger 50.
- the downstream of the heat exchanger 50 can always be supplied with the liquefied gas suitable for the temperature required by the demand source 20 to the demand destination 20. This feed forward control will be described later.
- the medium supply device 60 supplies a heat transfer medium to the heat exchanger 50.
- the medium supply device 60 includes a medium tank 61, a medium pump 62, a medium heater 63, a medium circulation line 64, a branch line 65, and a heat source supply line 66.
- the medium tank 61 stores a heat transfer medium.
- the heat transfer medium may be glycol water, as mentioned above, and the medium tank 61 may be heated to a temperature to prevent cracking of glycol water (a phenomenon in which water and ethylene glycol are separated due to a phase change of water).
- the transmission medium can be stored.
- a media pump 62 Downstream of the media tank 61, a media pump 62 is provided so that a certain amount of heat transfer medium can flow from the media tank 61 into the media heater 63 by the media pump 62.
- the heat exchanger 50 is connected upstream of the medium tank 61 to supply heat to the liquefied gas, and the cooled heat transfer medium may be re-introduced into the medium tank 61.
- the medium tank 61, the medium pump 62, the medium heater 63, and the heat exchanger 50 may be connected by a medium circulation line 64. That is, while the heat transfer medium flows along the medium circulation line 64, the heat transfer medium may move in the order of the medium tank 61, the medium pump 62, the medium heater 63, and the heat exchanger 50 to be heated or cooled.
- the medium pump 62 supplies the heat transfer medium stored in the medium tank 61 to the medium heater 63.
- the medium pump 62 may be provided downstream of the medium tank 61, and may be provided in plural numbers so that the heat transfer medium is smoothly supplied through the other medium pump 62 when any one of the medium pumps 62 is damaged. You can do that.
- the medium pump 62 may control the flow rate of the heat transfer medium supplied to the medium heater 63 by driving control by the controller 90 to be described later. That is, the driving speed, pressure, etc. of the medium pump 62 may be changed by the controller 90, which means that the flow rate of the heat transfer medium flowing into the medium heater 63 is changed.
- the change in the flow rate of the heat transfer medium introduced into the medium heater 63 refers to the change of the total heat amount of the heat transfer medium discharged from the medium heater 63 and introduced into the heat exchanger 50, and the present embodiment may change the flow rate of the heat transfer medium.
- the amount of heat supplied to the liquefied gas by the heat transfer medium may be controlled.
- the medium heater 63 heats the heat transfer medium discharged from the medium tank 61 and then supplies the heat transfer medium to the heat exchanger 50.
- the medium heater 63 may heat the heat transfer medium to a constant temperature so that the heat transfer medium supplies sufficient heat to the liquefied gas in the heat exchanger 50.
- the medium heater 63 may heat the heat transfer medium using electric energy, but the present embodiment may use steam. That is, the heat source supply line 66 for supplying a heat source is connected to the medium heater 63, and the heat source supply line 66 supplies steam generated by a boiler (not shown) to the medium heater 63, and the steam The silver supplies heat to the heat transfer medium and the heat transfer medium cools the steam so that the heat transfer medium is heated and the steam can be condensed with condensate.
- the condensate may be re-introduced into the boiler through a condensate tank (not shown), changed into steam, and then introduced into the medium heater 63 again, and the heat transfer medium heated by the steam is discharged from the medium heater 63. And may be introduced into the heat exchanger 50.
- the medium circulation line 64 is connected from the medium heater 63 to the heat exchanger 50 to circulate the heat transfer medium.
- the heat transfer medium may be heated in the medium heater 63 and cooled by the liquefied gas in the heat exchanger 50 while circulating along the medium circulation line 64.
- the medium circulation line 64 may connect the medium tank 61, the medium pump 62, the medium heater 63, and the heat exchanger 50 to circulate the heat transfer medium.
- the efficiency can be increased by reusing the heat transfer medium.
- the present embodiment may include a medium discharge line (not shown) that discharges some of the heat transfer medium discharged from the heat exchanger 50 to the outside, and the medium discharge line is branched from the medium circulation line 64. Can be.
- Branch line 65 causes at least some of the heat transfer medium to branch off medium circulation line 64 to bypass medium heater 63.
- Branch line 65 may branch at an upstream point of media heater 63 on media circulation line 64 and join at a downstream point of media heater 63.
- the temperature of the heat transfer medium can be varied by allowing some of the heat transfer medium to bypass the medium heater 63 and join.
- the branch line 65 may be provided with a bypass control valve 651.
- the bypass control valve 651 is controlled by the controller 90 to be described later, it is possible to adjust the flow rate of the heat transfer medium flowing into the branch line (65).
- the bypass control valve 651 may be a two-way valve provided on the branch line 65.
- the heat source supply line 66 supplies a heat source to the medium heater 63.
- the heat source is to heat the heat transfer medium so that the heated heat transfer medium can heat the liquefied gas, it may be steam. That is, the heat source supply line 66 may be a steam supply line.
- the heat source supply valve 661 may be provided on the heat source supply line 66.
- the heat source supply valve 661 may adjust the opening degree of the heat source supply line 66, the amount of steam flowing along the heat source supply line 66 is controlled by the heat source supply valve 661, and the medium heater 63 is provided. The discharge temperature of the heat transfer medium heated in the may vary.
- the heat source supply valve 661 may be controlled by the controller 90.
- the liquefied gas temperature sensor 70 is provided on the liquefied gas supply line 21 and measures the temperature of the liquefied gas.
- the liquefied gas temperature sensor 70 may be provided between the pump 30 and the heat exchanger 50 on the liquefied gas supply line 21 to measure the temperature of the liquefied gas pressurized by the high pressure pump 32. Can be.
- the present embodiment does not control the degree of heating of the heat exchanger 50 through the temperature of the liquefied gas heated by the heat exchanger 50, but rather through the temperature of the liquefied gas to be introduced into the heat exchanger 50.
- the amount of heat of the heat transfer medium to be supplied to 50 may be controlled. This is called feed forward control.
- the calorific value calculator 80 calculates the flow rate of the liquefied gas supplied to the heat exchanger 50 through the driving degree of the pump 30, and calculates the flow rate of the liquefied gas and the state of the liquefied gas required by the demand destination 20. Calculate the required amount of heat for the heat transfer medium.
- the driving degree of the pump 30 means the RPM of the pump 30, and the pump 30 may be a high pressure pump 32 which is a volumetric pump 30.
- the calorific value calculator 80 may calculate the required calorific value of the heat transfer medium using the flow rate of the liquefied gas, the temperature of the liquefied gas measured by the liquefied gas temperature sensor 70, and the required temperature of the liquefied gas of the demand destination 20. have.
- the calorific value calculator 80 is configured to calculate the total amount of heat that the liquefied gas should be supplied from the heat exchanger 50 in order to supply the liquefied gas properly to the demander 20.
- the flow rate of the liquefied gas before entering the heat exchanger 50 and By grasping the temperature, the amount of heat required for the liquefied gas to reach the required temperature of the demand destination 20 may be calculated as the required heat amount of the heat transfer medium.
- the heat transfer medium to be introduced into the heat exchanger 50 is controlled by using the flow rate and temperature of the liquefied gas flowing into the heat exchanger 50.
- the amount of heat that should be included can be calculated, and the controller 90, which will be described later, receives the required amount of heat from the heat transfer medium 80 and the flow rate of the heat transfer medium or medium heater introduced into the medium heater 63 ( The amount of heat source supplied to 63 can be adjusted.
- the present embodiment can effectively allow the temperature of the liquefied gas to reach the required temperature of the demand destination 20, thereby significantly improving the system efficiency.
- the controller 90 receives the required amount of heat of the heat transfer medium from the calorific value calculator 80 and outputs the flow rate of the heat transfer medium flowing into the medium heater 63 or the amount of heat supplied by the medium heater 63 to the heat transfer medium. Variable. Of course, the controller 90 may vary the flow rate of the heat transfer medium or the like based on the flow rate of the liquefied gas flowing into the heat exchanger 50.
- the controller 90 may control the driving of the medium pump 62 to control the flow rate of the heat transfer medium supplied from the medium pump 62 to the medium heater 63, or on the branch line 65.
- a flow rate of the heat transfer medium flowing into the branch line 65 may be adjusted through the bypass control valve 651 provided.
- the controller 90 controls the amount of the heat source supplied to the heat transfer medium by the medium heater 63 by adjusting the opening degree of the heat source supply valve 661 provided in the heat source supply line 66, thereby providing a heat transfer medium.
- the heating temperature of can be varied.
- the controller 90 may return at least a portion of the heat transfer medium flowing from the medium pump 62 to the medium heater 63 to the medium tank 61 or the medium pump 62 to adjust the flow rate of the medium heater 63.
- the controller 90 of the present embodiment is not limited to the above description, and any control is possible as long as the flow rate of the heat transfer medium supplied to the medium heater 63 can be varied.
- the present embodiment measures the flow rate, the temperature, and the like of the liquefied gas supplied from the liquefied gas storage tank 10 at the front end of the heat exchanger 50, and takes the temperature of the liquefied gas required by the demand destination 20 into consideration.
- the amount of heat that the liquefied gas should receive from the heat exchanger 50 is calculated as the required amount of heat of the heat transfer medium, and according to the calculated amount of heat of the heat transfer medium, the inflow amount of the medium heater 63 or the medium heater 63 of the heat transfer medium is calculated.
- the amount of heat source supplied to the heat transfer medium in the it is possible to effectively heat the liquefied gas.
- the liquefied gas treatment method according to an embodiment of the present invention may be a method of implementing the liquefied gas treatment system 2 according to an embodiment of the present invention described above, and with reference to FIG. Explain.
- the liquefied gas treatment method according to an embodiment of the present invention, the step of calculating the flow rate of the liquefied gas supplied to the heat exchanger (50), measuring the temperature of the liquefied gas (S20), calculating the required amount of heat of the heat transfer medium to be supplied to the heat exchanger 50 based on the flow rate of the liquefied gas, the temperature of the liquefied gas, and the state of the liquefied gas required by the demand source 20 (S30), heat And varying the flow rate of the heat transfer medium flowing into the medium heater 63 or the amount of heat supplied by the medium heater 63 to the heat transfer medium according to the required heat amount of the transfer medium (S40).
- step S10 the flow rate of the liquefied gas supplied to the heat exchanger 50 is calculated.
- the flow rate of the liquefied gas can be calculated through the driving degree of the pump 30, wherein the driving degree of the pump 30 means the RPM of the pump 30, the pump 30 is the liquefied gas through the RPM
- the volumetric pump 30 capable of grasping the flow rate may be a high pressure pump 32.
- step S20 the temperature of the liquefied gas is measured.
- the temperature of the liquefied gas means a temperature before it is heated, and in step S20, the liquefied gas temperature sensor 70 may measure the temperature of the liquefied gas between the pump 30 and the heat exchanger 50.
- the flow rate and temperature of the liquefied gas flowing into the heat exchanger 50 through the steps S10 and S20 are known, and given the temperature of the liquefied gas required by the demand destination 20, the liquefied gas is based on the current heat quantity of the liquefied gas. You can calculate the calories you need to supply.
- the amount of heat that liquefied gas should be supplied means the amount of heat that should be supplied to the liquefied gas in the heat exchanger 50, that is, the required amount of heat of the heat transfer medium.
- the present embodiment implements feedforward control based on the liquefied gas flow rate and temperature in front of the heat exchanger 50, thereby enabling efficient liquefied gas heating.
- step S30 the required amount of heat of the heat transfer medium to be supplied to the heat exchanger 50 is calculated based on the flow rate of the liquefied gas, the temperature of the liquefied gas, and the state of the liquefied gas required by the demand source 20.
- Step S30 may be implemented by the calorie calculator 80 described above, the calorie calculator 80 detects the flow rate of the liquefied gas through the RPM of the pump 30, and through the liquefied gas temperature sensor 70 By identifying the liquefied gas temperature it is possible to calculate the current amount of heat of the liquefied gas to be introduced into the heat exchanger (50).
- the calorific value calculator 80 can calculate the temperature change amount of the liquefied gas through the temperature of the liquefied gas required by the customer 20, and can accurately calculate the calories to be supplied to the liquefied gas using the calorie calculation formula. .
- the amount of heat calculated as described above is a required amount of heat of the heat transfer medium, and is a target amount of heat that the heat transfer medium must be heated by the medium heater 63 to reach.
- step S40 the flow rate of the heat transfer medium flowing into the medium heater 63 or the amount of heat supplied by the medium heater 63 to the heat transfer medium is varied according to the required heat amount of the heat transfer medium.
- the required amount of heat of the heat transfer medium is obtained through the amount of heat that the liquefied gas should receive, and the required amount of heat of the heat transfer medium is supplied through the medium heater 63. Therefore, the required amount of heat of the heat transfer medium may vary depending on the flow rate of the heat transfer medium flowing into the medium heater 63, or depending on the amount of heat source (steam, etc.) transferred from the medium heater 63 to the heat transfer medium. Can vary.
- step S30 may be omitted, and the flow rate of the heat transfer medium may be varied according to the flow rate of the liquefied gas introduced into the heat exchanger 50 in S40.
- the present embodiment calculates the amount of heat required for the liquefied gas to satisfy the required condition of the demand destination 20 based on the temperature and flow rate of the liquefied gas as the required heat amount of the heat transfer medium, and the heat transfer medium calculates the required heat amount.
- the controller 90 may control the inflow amount of the medium heater 63 of the heat transfer medium or the heat source supply amount of the medium heater 63. A detailed operation of step S40 will be described in detail with reference to FIG. 4 below.
- step S40 of the liquefied gas treatment method is a detailed flowchart of step S40 of the liquefied gas treatment method according to an embodiment of the present invention.
- step S40 of the liquefied gas treatment method allows at least a portion of the heat transfer medium to bypass the media heater 63, but bypasses the media heater 63.
- step S41 at least a part of the heat transfer medium bypasses the medium heater 63, but controls the flow rate of the heat transfer medium bypassing the medium heater 63.
- the present embodiment may use the branch line 65 described above.
- the heat transfer medium enters the medium heater 63 via the medium pump 62, and some heat transfer medium passes through the branch line 65 by a bypass control valve 651 provided on the branch line 65. Flowing downstream of the medium heater 63, the remaining heat transfer medium may enter the medium heater 63 and be heated by steam or the like in the medium heater 63.
- the present embodiment allows the heat transfer medium to bypass the media heater 63, but changes the temperature of the heat transfer medium by varying the flow rate to bypass the heat transfer medium introduced into the heat exchanger 50. It may be to include the required amount of heat of the heat transfer medium calculated in S30.
- step S42 the driving of the medium pump 62 for supplying the heat transfer medium to the medium heater 63 is controlled.
- step S41 a portion of the heat transfer medium bypasses the medium heater 63, while in step S42, the flow of the heat transfer medium flowing into the medium heater 63 may be changed.
- the present embodiment may control the speed or pressure of the medium pump 62 to vary the flow rate supplied from the medium pump 62 to the medium heater 63. It may be allowed to enter the heat exchanger 50 with the required heat amount.
- step S43 the amount of the heat source supplied to the heat transfer medium introduced into the medium heater 63 is controlled.
- the flow rate of the heat transfer medium flowing into the medium heater 63 may be controlled, whereas in the case of step S43, the amount of heat source supplied to the medium heater 63 may be controlled.
- the heat source may be steam, and the amount of the heat source may be achieved by adjusting the opening degree of the heat source supply line 66 connected to the medium heater 63.
- the opening degree of the heat source supply line 66 may be implemented by a heat source supply valve 661 provided on the heat source supply line 66.
- the heat amount of the heat transfer medium heated and discharged by the medium heater 63 may vary, and according to this embodiment, the heat transfer medium requests the liquefied gas from the heat exchanger 50 to the destination 20. It can be made to heat up to temperature sufficiently.
- this embodiment may include a case in which at least one or more of the steps S41 to S43 are operated simultaneously. That is, in order to meet the required amount of heat of the heat transfer medium, the bypass flow rate of the medium heater 63 of the heat transfer medium may be adjusted and the steam supply amount may be adjusted.
- a heat transfer medium is introduced into the heat exchanger 50 using a method of recovering a part of the heat transfer medium supplied to the medium heater 63 to the medium tank 61 or the like.
- the amount of heat contained in the transmission medium can be varied.
- the present embodiment calculates the amount of heat required by the liquefied gas based on the flow rate and temperature of the liquefied gas before entering the heat exchanger 50, and calculates the amount of heat required by the heat transfer medium for supplying heat to the liquefied gas.
- the feed forward control may be performed by changing the flow rate of the heat transfer medium supplied to the medium heater 63 or the amount of heat source supplied from the medium heater 63 to the heat transfer medium in order to match the required amount of heat of the heat transfer medium. Effective liquefied gas supply is possible.
- bypass control valve 66 heat source supply line
- heat source supply valve 70 liquefied gas temperature sensor
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Abstract
Description
Claims (19)
- 액화가스 저장탱크로부터 수요처까지 연결된 액화가스 공급 라인;상기 액화가스 공급 라인 상에 마련되며, 상기 액화가스 저장탱크로부터 배출된 액화가스를 가압하는 펌프;상기 수요처와 상기 펌프 사이의 상기 액화가스 공급 라인 상에 마련되며, 상기 펌프로부터 공급되는 액화가스를 열 전달매체와 열교환시키는 열교환기;열 전달매체를 가열하는 매체 히터;상기 매체 히터로부터 상기 열교환기까지 연결된 매체 순환 라인; 및상기 열교환기로 공급되는 액화가스의 유량에 기초하여, 상기 매체 히터에 유입되는 상기 열 전달매체의 유량 또는 상기 매체 히터가 상기 열 전달매체에 공급하는 열량을 가변하는 컨트롤러를 포함하는 것을 특징으로 하는 액화가스 처리 시스템.
- 제 1 항에 있어서,상기 열교환기로 공급되는 상기 액화가스의 유량을 산출하고, 상기 액화가스의 유량 및 상기 수요처가 요구하는 액화가스의 상태를 토대로 상기 열 전달매체의 필요 열량을 계산하는 열량 산출기를 더 포함하고,상기 컨트롤러는, 상기 열량 산출기로부터 상기 열 전달매체의 필요 열량을 전달받아, 상기 매체 히터에 유입되는 상기 열 전달매체의 유량 또는 상기 매체 히터가 상기 열 전달매체에 공급하는 열량을 가변하는 것을 특징으로 하는 액화가스 처리 시스템.
- 제 2 항에 있어서, 상기 열량 산출기는,상기 펌프의 구동 정도를 통해 상기 액화가스의 유량을 산출하는 것을 특징으로 하는 액화가스 처리 시스템.
- 제 3 항에 있어서, 상기 펌프의 구동 정도는,상기 펌프의 RPM인 것을 특징으로 하는 액화가스 처리 시스템.
- 제 2 항에 있어서,상기 액화가스 공급 라인 상에 마련되며 상기 액화가스의 온도를 측정하는 액화가스 온도센서를 더 포함하고,상기 열량 산출기는, 상기 액화가스의 유량, 상기 액화가스의 온도, 상기 수요처의 액화가스 요구 온도를 이용하여 상기 열 전달매체의 필요 열량을 계산하는 것을 특징으로 하는 액화가스 처리 시스템.
- 제 5 항에 있어서, 상기 액화가스 온도센서는,상기 액화가스 공급 라인 상에서 상기 펌프와 상기 열교환기의 사이에 마련되는 것을 특징으로 하는 액화가스 처리 시스템.
- 제 1 항에 있어서,적어도 일부의 열 전달매체가 상기 매체 순환 라인에서 분기되어 상기 매체 히터를 우회하도록 하는 분기 라인을 더 포함하고,상기 컨트롤러는, 상기 분기 라인 상에 마련되는 우회 조절밸브를 통해 상기 분기 라인에 유입되는 상기 열 전달매체의 유량을 조절하는 것을 특징으로 하는 액화가스 처리 시스템.
- 제 1 항에 있어서,상기 열 전달매체를 저장하는 매체 탱크; 및상기 매체 탱크에 저장된 상기 열 전달매체를 상기 매체 히터에 공급하는 매체 펌프를 더 포함하되,상기 컨트롤러는, 상기 매체 펌프의 구동을 제어하여 상기 매체 펌프로부터 상기 매체 히터로 공급되는 상기 열 전달매체의 유량을 제어하는 것을 특징으로 하는 액화가스 처리 시스템.
- 제 1 항에 있어서,상기 매체 히터에 열원을 공급하는 열원 공급 라인; 및상기 열원 공급 라인 상에 마련되어 상기 열원 공급 라인의 개도를 조절하는 열원 공급밸브를 더 포함하되,상기 컨트롤러는, 상기 열원 공급밸브의 개도를 제어하여 상기 매체 히터가 열 전달매체에 공급하는 열원의 양을 제어하는 것을 특징으로 하는 액화가스 처리 시스템.
- 제 1 항에 있어서, 상기 열 전달매체는,글리콜 워터인 것을 특징으로 하는 액화가스 처리 시스템.
- 액화가스를 펌프로 가압하고 열교환기에서 열 전달매체로 가열하여 수요처에 공급하되, 매체 히터가 열 전달매체를 가열하여 상기 열교환기에 공급하는 액화가스 처리 시스템을 구동하는 방법에 있어서,상기 열교환기로 공급되는 액화가스의 유량을 산출하는 단계; 및상기 액화가스의 유량에 따라 상기 매체 히터에 유입되는 열 전달매체의 유량 또는 상기 매체 히터가 열 전달매체에 공급하는 열량을 가변하는 단계를 포함하는 것을 특징으로 하는 액화가스 처리 방법.
- 제 11 항에 있어서,상기 수요처가 요구하는 액화가스의 상태를 토대로 상기 열교환기에 공급될 열 전달매체의 필요 열량을 계산하는 단계를 더 포함하고,상기 열 전달매체의 유량 또는 열 전달매체에 공급하는 열량을 가변하는 단계는,상기 열 전달매체의 필요 열량에 따라 상기 매체 히터에 유입되는 열 전달매체의 유량 또는 상기 매체 히터가 열 전달매체에 공급하는 열량을 가변하는 것을 특징으로 하는 액화가스 처리 방법.
- 제 11 항에 있어서, 상기 액화가스의 유량을 산출하는 단계는,상기 펌프의 구동 정도를 통해 유량을 산출하는 것을 특징으로 하는 액화가스 처리 방법.
- 제 13 항에 있어서, 상기 펌프의 구동 정도는,상기 펌프의 RPM인 것을 특징으로 하는 액화가스 처리 방법.
- 제 12 항에 있어서,상기 액화가스의 온도를 측정하는 단계를 더 포함하고,상기 필요 열량을 계산하는 단계는,상기 액화가스의 유량, 상기 액화가스의 온도 및 상기 수요처가 요구하는 액화가스의 상태를 토대로 상기 열 전달매체의 필요 열량을 계산하는 것을 특징으로 하는 액화가스 처리 방법.
- 제 15 항에 있어서, 상기 온도를 측정하는 단계는,상기 펌프와 상기 열교환기 사이의 액화가스의 온도를 측정하는 것을 특징으로 하는 액화가스 처리 방법.
- 제 11 항에 있어서, 상기 열 전달매체의 유량을 가변하는 단계는,적어도 일부의 열 전달매체가 상기 매체 히터를 우회하도록 하되, 상기 매체 히터를 우회하는 열 전달매체의 유량을 제어하는 단계를 포함하는 것을 특징으로 하는 액화가스 처리 방법.
- 제 11 항에 있어서, 상기 열 전달매체의 유량을 가변하는 단계는,상기 매체 히터에 상기 열 전달매체를 공급하는 매체 펌프의 구동을 제어하는 단계를 포함하는 것을 특징으로 하는 액화가스 처리 방법.
- 제 11 항에 있어서, 상기 열 전달매체에 공급하는 열량을 가변하는 단계는,상기 매체 히터에 유입된 열 전달매체에 공급되는 열원의 양을 제어하는 단계를 포함하는 것을 특징으로 하는 액화가스 처리 방법.
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EP13790732.5A EP2851545B1 (en) | 2012-05-14 | 2013-05-14 | Method and system for treating a liquefied gas |
US14/131,675 US9851052B2 (en) | 2012-05-14 | 2013-05-14 | Method and system for treating a liquefied gas |
CN201380002881.4A CN103764986B (zh) | 2012-05-14 | 2013-05-14 | 用于处理液化气的方法和系统 |
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KR1020130054603A KR101342736B1 (ko) | 2012-05-14 | 2013-05-14 | 액화가스 처리 시스템 및 방법 |
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