Method for synchronizing time required for transmission of measurement-related signal of energy conversion system

Abstract

To optimize monitoring, measurement, and analysis by synchronizing the time required for transmission of measurement-related signals of an energy conversion system with the time used in the system.SOLUTION: A method for synchronizing a transmission time of measurement-related signals of an energy conversion system includes the steps of: measuring, in the energy conversion system, a first time taken for a first signal generated by a measuring instrument to be transmitted from the measuring instrument to a sensor mounted on a structure; measuring a second time taken for a second signal including measurement information generated by the sensor in response to the first signal to be transmitted from the sensor to the measuring instrument; measuring a third time taken for the measuring instrument to quantify the measurement information included in the second signal and extract a measurement value corresponding to the measurement information based on the quantification result; and synchronizing, in the energy conversion system, the first time, the second time, or the measured third time with a time used in the energy conversion system.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to an embodiment of the inventive concept to a method for synchronization of transit times of measurement-related signals of an energy conversion system and a method for numerical analysis for diagnostic functions of the energy conversion system. [Background technology]

[0002] Superconductivity is a phenomenon in which a material exhibits properties such as zero electrical resistance and the ability to push out internal magnetic fields. A superconductor is a material in which this phenomenon occurs.

[0003] In general, a superconducting system using a superconducting device including a superconductor requires a separate cooling facility to cool the temperature of the superconductor below a critical temperature, but such a separate cooling facility occupies a lot of space and is difficult to operate, maintain, and manage.

[0004] There is a technology to replace cooling equipment by supplying LNG from an LNG storage tank as a coolant for the refrigerant circulating through a superconducting device, but since the LNG is used only as a coolant for the refrigerant, there is a problem that its utilization rate is low in a system that utilizes various energy sources, and its energy efficiency is low. Summary of the Invention [Problem to be solved by the invention]

[0005] The problem that the present invention aims to solve is to provide a numerical analysis method that can synchronize the time required for transmitting measurement-related signals of an energy conversion system, which is necessary for efficiently utilizing the cold energy contained in liquefied fuel, with the time used in the energy conversion system, and can optimize monitoring, measurement, and analysis for the diagnostic functions of the energy conversion system. [Means for solving the problem]

[0006] A method for synchronizing transmission times of measurement-related signals in an energy conversion system according to an embodiment of the present invention includes the steps of: measuring, in the energy conversion system, a first time taken for a first signal generated by a measuring device to be transmitted from the measuring device to a sensor mounted on a structure; measuring, in the energy conversion system, a second time taken for a second signal including measurement information generated by the sensor in response to the first signal to be transmitted from the sensor to the measuring device; measuring, in the energy conversion system, a third time taken for a process in which the measuring device quantifies the measurement information included in the second signal and extracts a measurement value corresponding to the measurement information according to a result of the quantification; and synchronizing, in the energy conversion system, the first measured time, the second measured time, or the third measured time with a time used in the energy conversion system.

[0007] A numerical analysis method for a diagnostic function of an energy conversion system according to an embodiment of the present invention includes a step of setting, in an energy conversion system, the results of a dynamic simulation of gas, fluid or thermodynamics using numerical analysis as conditions; a step of optimizing, in the energy conversion system, the numerical analysis for the diagnostic function of the energy conversion system based on empirical data using a numerical analysis technique for the set conditions, and extracting an optimal method according to the optimized result; and a step of monitoring, measuring, or analyzing and controlling, the gas, fluid or thermodynamics, in the energy conversion system, based on the extracted optimal method. Effect of the Invention

[0008] The method for synchronizing the transmission time required for measurement-related signals of an energy conversion system and the numerical analysis method for the diagnostic function of an energy conversion system according to an embodiment of the present invention synchronize the transmission time required for measurement-related signals of an energy conversion system, which is necessary for efficiently utilizing the cold contained in liquefied fuel, with the time used for the energy conversion system, and can optimize monitoring, measurement, and analysis for the diagnostic function of the energy conversion system.

[0009] The cold energy utilization system according to the embodiment of the present invention has an advantage that the cold energy contained in the liquefied fuel can be utilized in many ways.

[0010] The cold energy utilization system according to an embodiment of the present invention can utilize the cold energy contained in liquefied fuel (or liquefied reformed gas) to create an ultra-low temperature environment for equipment that requires such an environment, such as a liquefaction device or a superconducting device, thereby enabling efficient use of energy.

[0011] A cold energy utilization system according to an embodiment of the present invention utilizes the cold energy contained in liquefied fuel stored in a fuel storage tank to maintain the superconducting state of a superconducting generator, and can convert the mechanical energy generated by an engine that uses the liquefied fuel into electrical energy using the superconducting generator, thereby enabling efficient use of energy. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a diagram conceptually illustrating an energy conversion system according to an embodiment of the present invention. [Diagram 2] FIG. 13 illustrates an example in which a portion of a fuel transfer line is coiled around an energy conversion device, according to an embodiment of the present invention. [Diagram 3] FIG. 1 is a diagram conceptually illustrating an energy conversion system according to an embodiment of the present invention. [Figure 4]1 is a flowchart showing a numerical analysis for diagnosis / control functions of an energy conversion system according to an embodiment of the present invention and a monitoring / measurement method therefor. [Diagram 5] 1 is a flow chart illustrating a method for synchronizing transmission times of measurement-related signals in an energy conversion system according to an embodiment of the present invention. [Figure 6] FIG. 1 is a diagram conceptually illustrating a hybrid system that includes an energy conversion system according to an embodiment of the present invention and utilizes cold energy from liquefied fuel. [Figure 7] 1 is a diagram conceptually illustrating a cold energy utilization system according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific details for carrying out the present invention will be described in detail with reference to the accompanying drawings.

[0014] 1 conceptually illustrates an energy conversion system according to an embodiment of the present invention. Referring to FIG. 1, an energy conversion system 100 according to an embodiment of the present invention may include a fuel storage tank (or fuel storage device) 110, an energy conversion device 120, a fuel transmission line 130, and a condition control device 140.

[0015] The fuel storage tank 110 stores liquefied fuel. The liquefied fuel stored in the fuel storage tank 110 can be supplied to a driving device or a fuel cell. The driving device can be, but is not limited to, an engine or an internal combustion engine. Although one fuel storage tank 110 is shown in FIG. 1, there can be one or more fuel storage tanks 110.

[0016] The liquefied fuel stored in the fuel storage tank 110 may be at a low temperature (e.g., below freezing) or at a high pressure. For example, the liquefied fuel may include at least one of liquefied petroleum gas (LPG), liquefied natural gas (LNG), and liquefied hydrogen. Since the LPG, the LNG, and the liquefied hydrogen are in a gas phase at 25° C. and 1 atm (e.g., standard state), the inside of the fuel storage tank 110 must be at a low temperature or high pressure in order to maintain the LPG, the LNG, and the liquefied hydrogen in a liquid phase.

[0017] The liquefied fuel stored in the fuel storage tank 110 can be converted into electrical energy (or electric power) or mechanical energy (or power) before being transferred from the fuel storage tank 110 to the energy conversion device 120, and the fuel storage tank 110 can transfer the converted electrical energy or mechanical energy to the energy conversion device 120.

[0018] The energy conversion device 120 can convert the electrical energy transferred from the fuel storage tank 110 into mechanical energy (e.g., using a motor) or can convert the transferred mechanical energy into electrical energy (e.g., using a generator).

[0019] The energy conversion device 120 may exhibit optimal conversion efficiency in a specific low temperature range. According to an embodiment, the energy conversion device 120 may provide optimal energy conversion efficiency in an ultra-low temperature range. For example, the energy conversion device 120 may be realized as a superconductor motor or a superconducting generator having optimal conversion efficiency in the specific ultra-low temperature range.

[0020] In this specification, ultra-low temperature means a temperature at which the superconducting phenomenon can be exhibited (or observed). For example, the ultra-low temperature may mean a temperature below 40 degrees Kelvin, but is not limited thereto.

[0021] The fuel transfer line 130 may be a passage or device that transfers the liquefied fuel stored in the fuel storage tank 110 to a drive device or a fuel cell.

[0022] According to an embodiment, the fuel transmission line 130 can use heat generated from the energy conversion device 120 to vaporize the liquefied fuel supplied from the fuel storage tank 110 and transmit the vaporized fuel to the driving unit or the fuel cell.

[0023] Depending on the embodiment, a portion of the fuel transfer line 130 may wrap around the outside of the energy conversion device 120. For example, as shown in Fig. 2, a portion of the fuel transfer line 130 may have a pipe structure that surrounds the energy conversion device 120 in a coil shape. In this case, the fuel transfer line 130 may also wrap around the power line, which may be used as a heat exchanger to minimize power loss.

[0024] In some embodiments, at least a portion of the fuel transfer line 130 may be realized in a manner that completely encapsulates the external volume of the energy conversion device 120 .

[0025] The condition control device 140 can control the fuel transmission line 130 so that when the temperature of the energy conversion device 120 drops due to heat exchange between the energy conversion device 120 and a portion of the fuel transmission line 130, the temperature of the energy conversion device 120 is set to a (predetermined) reference temperature interval.

[0026] According to an embodiment, the condition control device 140 may include a temperature detection sensor capable of measuring the temperature of the energy conversion device 120. The condition control device 140 may monitor the temperature of the energy conversion device 120 using the temperature detection sensor, and may detect whether the temperature of the energy conversion device 120 is outside the reference temperature range based on the monitoring result.

[0027] The energy conversion system 100 shown in FIG. 1 may be included in, but is not limited to, a vessel, a vehicle, a rocket, a jet, or a generator.

[0028] The energy conversion system 100 can be operated in a manner that can prevent accidents associated with liquefied fuel stored in the fuel storage tank 110.

[0029] The energy conversion system 100 can provide cold energy (or cold heat) associated with the liquefied fuel stored in the fuel storage tank 110 to a superconducting motor, a generator, a power cable, a secondary battery, or a fuel cell via a refrigerant. For example, the refrigerant can be an inert gas. Thus, the superconducting motor, the generator, the power cable, the secondary battery, or the fuel cell can operate under optimal conditions (e.g., conditions in which a superconducting state can be reached), and therefore provide optimal efficiency.

[0030] The energy conversion system 100 may further include a gas analyzer capable of monitoring the inert gas or air. Depending on the embodiment, the gas analyzer may be located at the input end (between the fuel storage tank 110 and the energy conversion device 120) or the output end (between the fuel transmission line 130 and the driving unit, or between the fuel transmission line 130 and the fuel cell) of the inert gas or air.

[0031] For example, the gas analyzer may be an analyzer that uses absorption spectrometry, combustion analysis, chemistry analysis, and / or instrumental analysis, for example, the gas analyzer may be a spectrometer or an analyzer based on gas absorption techniques.

[0032] Thus, the energy conversion system 100 can monitor the inert gas or air and use the monitoring results to prevent a possible explosion.

[0033] The energy conversion system 100 may use electrical measuring technology or optical measuring technology to measure the energy conversion system 100 or a structure including the energy conversion system 100. For example, the energy conversion system 100 may be included in a ship, an automobile, a rocket, a jet, or a generator that generates power in response to an external force (e.g., a wind power generator, a tidal power generator, a hydroelectric power generator, an ocean current power generator, etc.), so the structure may refer to the ship, the automobile, the rocket, the jet, or the generator.

[0034] Depending on the embodiment, the energy conversion system 100 may use electrical or optical measurement techniques to measure an external force acting on a structure or the response of the structure to the external force. For example, the external force may be a wind load, a tide load, a hydraulic load, an ocean current load, a wave load, or an electric current load, and the response of the structure to the external force may be a displacement, a deformation, a motion, or a vortex.

[0035] In some embodiments, the energy conversion system 100 can use electrical or optical measurement techniques to measure an internal force acting on a structure or a response of the structure to the internal force. For example, the internal force can be a sloshing load, a flow load, a pressure load, or a thermal load on a component included in the energy conversion system 100 (e.g., the fuel storage tank 110 or 320), the energy conversion device 120 or 330, the fuel transmission line 130 or 140, or the condition control device 140 or 350, and the response of the structure to the internal force can be a displacement, deformation, movement, walking, buckling, or vortex flow.

[0036] For example, the energy conversion system 100 can be measured using a lidar, a particle tracking velocimetry, a particle image velocimetry, a strain sensor, an accelerometer, an ammeter, an acoustic emission tester, a seismometer, a current meter, a thermal sensor, or an optical time domain reflectometer (OTDR), a distributed temperature sensor (DTS), a brillouin optical time domain reflectometry analyzer (BOTRA), a brillouin optical time domain reflectometry (BOTDR), a distributed acoustic sensor (DAS), or a distributed vibration sensor (DVS).

[0037] The energy conversion system 100 can perform diagnostic or prognostic functions using measurements or condition based maintenance.

[0038] Depending on the embodiment, the energy conversion system 100 can provide control functions including predictive control (temperature, gas or fluid dynamics flow, pressure, measurement, diagnostics and control) or autoregulation, or safety functions including emergency control (EC) or emergency shut down (ESD).

[0039] Depending on the embodiment, the energy conversion system 100 may monitor the condition or position of an operator of an offshore structure via a heart beat or behavior sensor or a position sensor, and may generate an alert or alarm when the operator is in a dangerous condition based on the results of the monitoring.

[0040] Depending on the embodiment, the energy conversion system 100 may provide a maintenance function using condition-based maintenance, etc.

[0041] When the measurement target structure is a conductor or the energy conversion system 100 performs measurements in an electromagnetic field, the energy conversion system 100 can minimize the error range of experimental (or observational) measurement results or empirical data using optical measurements (e.g., optical wired measurements or optical wireless measurements). In some embodiments, the energy conversion system 100 can minimize the error range of the measurement results or the empirical data by processing (or processing) the measurement results or the empirical data using context awareness technology.

[0042] Therefore, the energy conversion system 100 can eliminate measurement uncertainty and improve measurement accuracy or repeatability.

[0043] Depending on the embodiment, artificial intelligence or machine learning techniques may be used to minimize the error range of the measurement results or the verification data, so that the energy conversion system 100 may be (semi-) automated.

[0044] According to an embodiment, the energy conversion system 100 can perform an optical wired measurement function using an optical fiber sensor. According to an embodiment, the optical fiber sensor can measure the temperature or tension of a measurement target structure.

[0045] The optical fiber sensor may include a fiber for transmitting an optical signal, the fiber may include a fiber for transmitting an optical signal including silica, quartz, or a polymer, and the fiber for transmitting an optical signal may be a fiber coated or packaged with a functional composite material for thermal insulation or tensile reinforcement.

[0046] Fig. 3 is a conceptual diagram of an energy conversion system according to an embodiment of the present invention. Referring to Fig. 3, the energy conversion system 300 may include a fuel generating device 310, a fuel storage tank 320, an energy conversion device 330, a fuel transmission line 340, and a condition control device 350. Depending on the embodiment, the energy conversion system 300 of Fig. 3 may be included in a generator capable of utilizing water. For example, the energy conversion system 300 may be included in an offshore wind power generator, a tidal power generator, an ocean current power generator, or a hydroelectric power generator.

[0047] The energy conversion system 300 of Fig. 3 differs from the energy conversion system 100 of Fig. 1 in that it further includes a fuel generating device 310 that generates hydrogen fuel and uses hydrogen fuel among liquefied fuels. It can be understood that the energy conversion device 330, the fuel transmission line 340, and the condition control device 350 of Fig. 3 can perform functions related to hydrogen fuel among the functions of the energy conversion device 120, the fuel transmission line 130, and the condition control device 140 of Fig. 1, respectively. Therefore, detailed description of these (320, 330, 340, and 350) will be omitted.

[0048] The fuel generator 310 can generate hydrogen fuel using water available to the energy conversion system 300 (e.g., water adjacent to the energy conversion system 300) and supply the generated hydrogen fuel to the fuel storage tank 320. The fuel storage tank 320 can store the hydrogen fuel transmitted from the fuel generator 310.

[0049] FIG. 4 is a flowchart showing a numerical analysis for a diagnostic function (or a control function) of an energy conversion system according to an embodiment of the present invention, or a monitoring (or measurement) method using the numerical analysis.

[0050] 1 to 4, the energy conversion system 100 or 300 (hereinafter referred to as 100) may set the result of dynamic simulation of gas, fluid or thermodynamics using numeric analysis (or numerical modeling) based on multiphysics or similar techniques as a boundary condition (S410). For example, the condition may be a condition related to an external or internal force.

[0051] The energy conversion system 100 optimizes (or validates) a numerical analysis (or numerical analysis modeling) for the diagnosis function (or control function) based on experimental (or observational) measurement results or empirical data using a fluid structure interaction (FSI) technique or a similar technique for the conditions, and extracts an optimal (or simple) method (or formula) according to the optimization results (S420). For example, the energy conversion system 100 can optimize a numerical analysis method for the diagnosis function (or control function) in a manner suitable for the measurement results.

[0052] The energy conversion system 100 may monitor, measure or analyze and control (e.g., feed forward or predictive) at least one of gas, fluid or thermodynamics, position, and shape based on the optimal method extracted in step S420 (S430).

[0053] Thus, the energy conversion system 100 may reduce fuel consumption, provide safe operation, or extend safe operation time of the energy conversion system 100 (or the structure in which the energy conversion system 100 is included).

[0054] Depending on the embodiment, the energy conversion system 100 may use artificial intelligence or machine learning techniques to perform the steps (S410 to S430) of Fig. 4. Thus, the energy conversion system 100 may be (semi-) automated.

[0055] The energy conversion system 100 performs measurements on a structure, and based on the measurement results, scans the outer shape of the structure using a pulsed laser (i.e., laser scans) and processes and displays it as a three-dimensional image.

[0056] FIG. 5 is a flowchart showing a method for synchronizing a transmission time required for a measurement-related signal in an energy conversion system according to an embodiment of the present invention. Referring to FIGS. 1 to 5, the energy conversion system 100 measures a first time required for a first signal generated by a measurement device to be transmitted from the measurement device to a sensor mounted on a structure (S510). The first signal is a signal that activates or enables the sensor. For example, the first signal may be a turn-on signal or an operating voltage. The energy conversion system 100 measures a second time required for a second signal generated by the sensor in response to the first signal to be transmitted from the sensor to the measurement device (S520). The second signal may be a detection signal generated by the sensor. For example, the second signal may include measurement information.

[0057] The energy conversion system 100 measures a third time taken for the measuring device to quantify the measurement information included in the second signal and extract a measurement value corresponding to the measurement information based on the quantification result (S530).

[0058] The energy conversion system 100 synchronizes the measured first time, the measured second time, or the measured third time with the time used in the energy conversion system 100. Here, the time may be a standard time obtained by a GPS or the like (S540).

[0059] FIG. 6 conceptually illustrates a hybrid system that includes an energy conversion system according to an embodiment of the present invention and utilizes the cold energy of liquefied fuel.

[0060] 6, new renewable power 601, such as wind power, tidal power, wave power, geothermal power, or solar energy, and boiler turbine power 602 are transmitted to a turbine (or steam turbine) 603. The turbine 603 may be a generator capable of generating electrical energy. Depending on the embodiment, the turbine 603 may produce electrical energy using the transmitted powers 601 and 602.

[0061] The turbine 603 can produce electrical energy (or electricity) by receiving the cold energy of the liquefied fuel via a heat exchanger 604. The produced electrical energy is stored via a battery charger 613. Depending on the embodiment, the heat exchanger 604 in FIG. 6 can be the energy converter 120 in FIG. 1.

[0062] Depending on the embodiment, the turbine 603 may be included in a hybrid vehicle, a ship, a rocket, etc.

[0063] A vehicle generator included in a hybrid vehicle will be described as an example. The vehicle generator is connected to an engine of the vehicle via a belt. At this time, the belt is connected to a rotating body (e.g., a rotor) of the vehicle generator. When the engine is driven, the rotating body of the vehicle generator rotates, and thus the vehicle generator produces electric energy. That is, the vehicle generator converts mechanical energy generated by the engine into electric energy.

[0064] The vehicle generator includes a generator that induces a predetermined AC voltage by the rotation of a rotor and rectifies the AC voltage to generate a DC voltage, a storage battery that is connected between an output end of the generator and a ground and that stores electric energy supplied from the generator, a warning light having one end connected to the output end of the generator, a warning light driving transistor that is connected between the other end of the warning light and the ground, and a terminal that receives the output of the generator as an input, and may include a detection device that controls the warning light to be turned on by turning on the warning light driving transistor when the terminals are short-circuited. A protection diode is connected between the terminals, and a load may be connected to the output end of the generator.

[0065] When any of the terminals of the vehicle generator is short-circuited, a warning light is turned on and the other terminals that are not short-circuited continue to generate power, thereby supplying electrical energy to the storage battery or the load without interruption.

[0066] The heat exchanger 604 generates cold energy by heat exchanging the liquefied fuel stored in the fuel cylinder 605 with the boiled off gas (BOG) 607 produced through BOG liquefaction 606. Depending on the embodiment, the fuel cylinder 605 may be the fuel storage tank 110 of FIG.

[0067] The cold energy may be transferred to a gas supply system 608. In some embodiments, the gas supply system 608 may be a fueled gas supply system.

[0068] The gas supply system 608 may be the conditioner 104 of FIG.

[0069] Depending on the embodiment, the gas supply system 608 may include at least one of a motor for a compressor, a pump, and a valve.

[0070] The gas supply system 608 can transfer the transferred cold energy to a first engine 609 and a second engine 610 .

[0071] The first engine 609 can be driven by the cold energy to operate the turbine 603 to produce electricity. The first engine 609 can also store the liquefied CO2 gas in a CO2 storage cylinder 612 through a CO2 liquefaction or hydrate process 611. For example, the first engine 609 can be a low pressure engine.

[0072] The second engine 610 is driven according to the transferred cold energy, and can drive a propellant 615 in cooperation with a motor 614 driven by receiving electric energy from the turbine 603. The propellant 615 can be, but is not limited to, a propeller or a wheel.

[0073] For example, the second engine 610 is a high pressure engine and can operate in the range of 2-3000 RPM.

[0074] The BOG 607 can be transferred to a reformer 616. The reformer 616 can extract hydrogen from the BOG 607 and store the extracted hydrogen in a hydrogen storage cylinder 617. In some embodiments, the hydrogen storage cylinder 617 can store hydrogen liquefied fuel produced by a liquefaction process 620. For example, the liquefaction process 620 can utilize cold energy produced via heat exchange 604.

[0075] The hydrogen liquefied fuel can be supplied to a fuel cell 619 .

[0076] The hydrogen or oxygen reformer 618 may utilize the energy (eg, electrical energy) transferred to the motor 614 to extract oxygen or hydrogen and transfer the extracted oxygen or hydrogen to a fuel cell 619 .

[0077] A hydrogen or oxygen reformer 618 processes the extracted hydrogen in a liquefaction process 620 and the liquefied hydrogen can be stored in hydrogen storage cylinders 617 .

[0078] The hydrogen or oxygen reformer 618 processes the extracted oxygen in a liquefaction process 620 and the liquefied oxygen may be stored in an oxygen storage tank.

[0079] Although the hybrid system of FIG. 6 is illustrated as including one hydrogen storage cylinder 617, according to some embodiments, the hybrid system may include a separate oxygen storage cylinder in addition to the hydrogen storage cylinder 617.

[0080] 7 conceptually illustrates a cold energy utilization system according to an embodiment of the present invention. Referring to FIG. 7, the cold energy utilization system 700 may include a fuel storage tank 710, a heat exchanger 720, a reformer 730, a reformed gas liquefaction device 740, a fuel cell 750, and a superconducting device 760. Depending on the embodiment, the cold energy utilization system 700 may further include a BOG storage tank 712, a fuel liquefaction device 714, and / or a reformed gas storage tank 732.

[0081] The cold energy utilization system 700 in FIG. 7 can correspond to the hybrid system shown in FIG.

[0082] 6, the heat exchanger 720 may correspond to the heat exchanger 604 in FIG. 6, the reformer 730 may correspond to the reformer 616 in FIG. 6, the reformed gas liquefaction device 740 may correspond to the liquefaction process 620 in FIG. 6, the fuel cell 750 may correspond to the fuel cell 619 in FIG. 6, and the superconducting device 760 may correspond to the turbine 603, the first engine 609, the second engine 610, or the motor 614 in FIG. 6, but is not limited thereto.

[0083] The fuel storage tank 710 can store liquefied fuel (LF). The liquefied fuel (LF) has a very low temperature state, and therefore has cryogenic energy. Cryogenic energy means very low temperature heat energy contained in a low temperature object.

[0084] Depending on the embodiment, the liquefied fuel (LF) may be any of LPG, LNG, and liquefied hydrogen, but is not limited thereto, and may refer to any material capable of storing cold energy, including hydrogen. For example, the liquefied fuel (LF) may be a natural chemical or a synthetic chemical containing at least one of hydrogen, carbon, and oxygen.

[0085] As described above, ultra-low temperature means a temperature at which the superconducting phenomenon can be exhibited (or observed). For example, the ultra-low temperature may mean a temperature below 40 degrees Kelvin, but is not limited thereto.

[0086] The fuel storage tank 710 may further include a control device for maintaining a low temperature or high pressure condition inside the fuel storage tank 710. For example, the fuel storage tank 710 may include a temperature sensor or a pressure sensor.

[0087] The fuel storage tank 710 can communicate liquefied fuel (LF) to the heat exchanger 720. The liquefied fuel (LF) can be communicated via a fuel line connected between the fuel storage tank 710 and the heat exchanger 720.

[0088] The BOG (BG) generated from the fuel storage tank 710 can be transferred to the reformer 730. BOG (BG) refers to gas generated by natural evaporation of the liquefied fuel (LF) stored in the fuel storage tank 710. Depending on the embodiment, the BOG (BG) may be gas generated from the liquefied fuel (LF) under standard conditions (e.g., 25° C. or 1 atm).

[0089] According to an embodiment, the fuel storage tank 710 may include a relief valve 711. The relief valve 711 may be automatically opened to transfer the generated BOG (BG) to the BOG storage tank 712 when the pressure of the fuel storage tank 710 exceeds a reference pressure due to generation of BOG (BG) in the fuel storage tank 710.

[0090] The BOG storage system 712 may store the BOG (BG) transferred from the fuel storage tank 710. The BOG storage system 712 may transfer the BOG (BG) to the fuel liquefaction system 714 and / or the reformer 730.

[0091] The fuel liquefaction system 714 can liquefy the delivered BOG (BG) and deliver the liquefied BOG to the fuel storage tank 710. The liquefied BOG can be the same material as the liquefied fuel (LF).

[0092] Depending on the embodiment, the fuel liquefaction device 714 may utilize the cold contained in the ultra-low temperature refrigerant (REF) transferred from the heat exchanger 720 to liquefy the BOG (BG) and transfer the liquefied BOG to the fuel storage tank 710.

[0093] BOG (BG) produced from the fuel storage tank 710 can be stored in a BOG storage system 712.

[0094] The heat exchanger 720 can transfer the cold contained in the liquefied fuel (LF) transferred from the fuel storage tank 710 and the liquefied reformed gas (LRG) transferred from the reformed gas liquefaction device 740 to the refrigerant (REF).

[0095] The refrigerant (REF) may be a material capable of transferring thermal energy (e.g., cold energy). In some embodiments, the refrigerant (REF) may be any of, but is not limited to, liquefied fuel (LF) or any of inert gases, ammonia, nitrogen, and antifreeze, and refers to a material capable of maintaining a liquid phase at very low or high temperatures.

[0096] Depending on the embodiment, the heat exchanger 720 can transfer the cold contained in the liquefied fuel (LF) (or the liquefied reformed gas (LRG)) to the refrigerant (REF) by passing the liquefied fuel line through which the liquefied fuel (LF) is transmitted (or the liquefied hydrogen line through which the liquefied reformed gas (LRG) is transmitted) through the refrigerant (REF).

[0097] According to an embodiment, the heat exchanger 720 may vaporize the liquefied fuel (LF) to generate the vaporized fuel (GF), and transfer the cold energy of the liquefied fuel (LF) to the refrigerant (REF) using the generated heat of vaporization.

[0098] The heat exchanger 720 can transfer the refrigerant (REF) to devices included in the cold utilization system 700. Depending on the embodiment, the heat exchanger 720 can transfer the refrigerant (REF) to the fuel liquefaction device 714, the reformed gas liquefaction device 740, or the superconducting device 760.

[0099] Depending on the embodiment, the cold utilization system 700 may further include a refrigerant line 722 that transfers a refrigerant (REF) to each device.

[0100] The heat exchanger 720 may transfer the vaporized fuel (GF) to the engine 770. Depending on the embodiment, the heat exchanger 720 may include a vaporizer that heats the liquefied fuel to generate vaporized fuel, a compressor that compresses the vaporized fuel transferred from the vaporizer at high pressure, or an injector that transfers the compressed vaporized fuel to the engine.

[0101] The reformer 730 may reform the BOG (BG) delivered from the fuel storage tank 710 (or the BOG storage tank 712) and extract a reformed gas (RG) from the BOG (BG) according to the result of the reforming. Depending on the embodiment, the reformer 730 may extract hydrogen, oxygen, or carbon from the BOG (BG).

[0102] Depending on the embodiment, the reforming gas (RG) may include hydrogen, oxygen, carbon, or a combination thereof. For example, the reforming gas (RG) may be, but is not limited to, hydrogen gas, oxygen gas, carbon gas, hydrocarbon, or oxide of carbon.

[0103] The extracted reformed gas (RG) can be stored in a reformed gas storage tank 732. Although FIG. 7 illustrates the cold energy utilization system 700 including one reformed gas storage tank 732, in some embodiments, the cold energy utilization system 700 can include multiple reformed gas storage tanks, and the reformed gas (RG) can be stored separately according to its properties.

[0104] In some embodiments, the reformer 730 may utilize thermal energy generated in response to operation of the engine 770 to extract reformed gas (RG) from the BOG (BG).

[0105] The reformer 730 may communicate the extracted reformed gas (RG) to a reformed gas liquefaction system 740 and / or a fuel cell 750. In some embodiments, the reformer 730 may communicate the extracted reformed gas (RG) to a reformed gas storage tank 732.

[0106] The reformed gas storage tank 732 can deliver stored reformed gas (RG) to the reformed gas liquefaction system 740 and / or the fuel cell 750 .

[0107] The reformed gas liquefaction device 740 may liquefy the transferred reformed gas (RG) to generate a liquefied reformed gas (LRG) and transfer the generated liquefied reformed gas (LRG) to the heat exchanger 720. Depending on the embodiment, the reformed gas liquefaction device 740 may liquefy the reformed gas (RG) by using cold energy contained in the ultra-low temperature refrigerant (REF) transferred from the heat exchanger 720.

[0108] The fuel cell 750 may generate electrical energy (or power (PW)) using the reformed gas (RG) delivered from the reformer 730. Depending on the embodiment, the fuel cell 750 may generate electrical energy (PW) using hydrogen gas or oxygen gas delivered from the reformer 730.

[0109] The fuel cell 750 can transfer the generated electrical energy (PW) to a superconducting device 760 .

[0110] The superconducting device 760 may be a device including a superconductor. The superconducting device 760 may be a device that operates using the superconducting phenomenon at an extremely low temperature. According to an embodiment, the superconducting device 760 may maintain a superconducting state by using the cold contained in the refrigerant (REF) transferred from the heat exchanger 720, and may operate in the superconducting state.

[0111] The cold utilization system 700 can include one superconducting device 760 or two or more superconducting devices 760 .

[0112] Depending on the embodiment, when including two or more superconducting devices 760 , the superconducting devices 760 may include a superconducting generator 761 , a superconducting power machine 763 , and / or a superconducting power storage device 765 .

[0113] The superconducting generator 761 can maintain a superconducting state by utilizing the cold stored in the refrigerant (REF) and generate electrical energy (or power (PW)) in the superconducting state. Depending on the embodiment, the superconducting generator 761 can convert mechanical energy (ME) transferred from the engine 770 into electrical energy (PW) in the superconducting state.

[0114] In some embodiments, the superconducting generator 761 may include a superconducting electromagnet and a superconducting rotor (e.g., a coil). The superconducting electromagnet may encase the superconducting coil and generate an electromagnetic field. The superconducting coil may rotate in the electromagnetic field generated by the superconducting electromagnet to convert mechanical energy (ME) to electrical energy (PW) when the engine 770 rotates.

[0115] The superconducting power device 763 can maintain a superconducting state by using the cold stored in the refrigerant (REF) and can consume electric energy (PW) in the superconducting state. In some embodiments, the superconducting power device 763 can consume electric energy (PW) transferred from the fuel cell 750.

[0116] The superconducting power storage device 765 can maintain a superconducting state by utilizing the cold energy stored in the refrigerant (REF) and store the electric energy (PW) produced from the superconducting generator 761 in the superconducting state. The superconducting power storage device 765 can transmit the stored electric energy (PW) to a device (e.g., the superconducting power device 763) included in the cold energy utilization system 700.

[0117] Depending on the embodiment, the superconducting power storage device 765 can convert the electrical energy (PW) produced from the superconducting generator 761 into magnetic energy, store it, and convert the stored magnetic energy back into electrical energy (PW) to supply it to the superconducting power equipment 763.

[0118] According to an embodiment, the superconducting power storage device 765 may be a flywheel that converts the electrical energy (PW) produced by the superconducting generator 761 into mechanical energy and stores it.

[0119] Depending on the embodiment, the superconducting device 760 may further include a superconducting cable 767 that transmits electrical energy (PW) between the devices 750, 761, 763, or 765. Depending on the embodiment, the superconducting cable 767 may transmit electrical energy (PW) generated by the superconducting generator 761 or the fuel cell 750 to each device of the cold energy utilization system 700.

[0120] Depending on the embodiment, the superconducting cable 761 may be surrounded by a refrigerant line 721. For example, the superconducting cable 761 may be comprised of a composite cable that transfers electrical energy (PW) and refrigerant (REF) between the devices 750, 761, 763, or 765.

[0121] The engine 770 may be an internal combustion engine that produces mechanical energy using the gaseous fuel (GF) transferred from the heat exchanger 720. Depending on the embodiment, the thermal energy generated by the engine 770 may be used by the reformer 730. For example, the engine 770 may be a rocket engine or a jet engine.

[0122] According to the cold energy utilization system 700, the cold energy contained in liquefied fuel (LF) (or liquefied reformed gas (LRG)) can be used to create an ultra-low temperature environment for equipment that requires such an environment, such as a liquefaction device or a superconducting device, thereby enabling efficient use of energy.

[0123] For example, according to the cold energy utilization system 700, the cold energy contained in the liquefied fuel (LF) is utilized to maintain the superconducting state of the superconducting device 760, and electric power energy generated using gaseous hydrogen (GH) extracted from the liquefied fuel (LF) can be supplied to the superconducting device 760.

[0124] The present invention has been described with reference to the embodiments shown in the drawings, but these are merely illustrative, and those skilled in the art will appreciate that various modifications and equivalent embodiments are possible therefrom. Therefore, the true technical scope of the present invention should be determined by the technical ideas of the appended claims. [Industrial Applicability]

[0125] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present concept relates to a method for time synchronization of measurement related signals of an energy conversion system and a method for numerical analysis for diagnostic functions of the energy conversion system.

Claims

1. measuring a first time it takes for a first signal generated by a measuring device in the energy conversion system to travel from the measuring device to a sensor mounted on the structure; measuring a second time it takes for a second signal, including measurement information generated by the sensor in response to the first signal, to travel from the sensor to the meter in the energy conversion system; measuring a third time taken for a process in which the measuring device quantifies the measurement information included in the second signal and extracts a measurement value corresponding to the measurement information according to a result of the quantification; and synchronizing the measured first time, the measured second time, or the measured third time with a time used in the energy conversion system; The measuring instrument measures the energy conversion system, which is a heat utilization system, or a structure including the energy conversion system, by using an electrical or optical measurement technique; In the energy conversion system, thermal energy or cold energy related to the liquefied fuel stored in the fuel storage tank is provided to a motor, a generator, a power cable, a power storage device, a secondary battery, or a fuel cell via a refrigerant; The energy conversion system includes a heat exchanger that receives cold contained in the liquefied fuel transferred from the fuel storage tank and transfers the received cold to a refrigerant, which is a substance that can transfer thermal energy while maintaining a liquid phase.A method for synchronizing the transmission times required for measurement-related signals in an energy conversion system.

2. The method for synchronizing transmission times of measurement-related signals in an energy conversion system according to claim 1 , wherein the first signal is a signal for activating or enabling the sensor.

3. The method for synchronizing transmission times of measurement-related signals in an energy conversion system according to claim 1 or 2, wherein the energy conversion system includes a gas analyzer capable of monitoring gas components.

4. The method for synchronizing transmission times of measurement-related signals in an energy conversion system according to claim 1 , wherein the energy conversion system is used in a ship, an automobile, a rocket, a jet, or a generator.

5. The method for synchronizing transmission times of measurement-related signals in an energy conversion system according to claim 1 , wherein the structure is a ship, an automobile, a rocket, a jet, or a generator.

6. The method for synchronizing transmission times of measurement-related signals in an energy conversion system according to claim 4 or 5, wherein the generator is a wind generator, a tidal generator, a hydroelectric generator, or an ocean current generator.

7. The method for synchronizing transmission times of measurement-related signals in an energy conversion system according to claim 1 , wherein the measuring instruments measure an external force acting on the structure or a response of the structure to the external force.

8. The method for synchronizing transmission times of measurement-related signals in an energy conversion system according to claim 7, wherein the external force is a wind load, a tidal load, a hydrodynamic load, an ocean current load, a wave load, an electromagnetic field, or a current load.

9. 9. The method for synchronizing the transmission times of measurement-related signals of an energy conversion system according to claim 7 or claim 8, wherein the response is particle tracking, flow velocity, displacement, deformation, motion, acceleration, electric current, electromagnetic field, sound, earthquake, temperature, vibration, or eddy current.

10. The method for synchronizing transmission times of measurement-related signals in an energy conversion system according to claim 1 , wherein the measuring instruments measure internal forces acting on the structure or responses of the structure to the internal forces.

11. The internal force is a sloshing load, a flow load, a pressure load, or a thermal load applied to a fuel storage tank, an energy conversion device, a fuel transmission line, or a condition control device included in the energy conversion system; The method for synchronizing the transmission times required for measurement-related signals in an energy conversion system as described in claim 10, wherein the condition control device controls the fuel transmission line so that the temperature of the energy conversion device is set within a preset reference temperature range when the temperature of the energy conversion device drops due to heat exchange between the energy conversion device and a portion of the fuel transmission line.

12. The method for synchronizing transmission times of measurement-related signals of an energy conversion system according to claim 10 or 11, wherein the reaction of the structure to the internal force is a displacement, a deformation, a vibration, a movement, a walking, a buckling, or a vortex flow.

13. The method for synchronizing the transmission time required for measurement-related signals in an energy conversion system as described in claim 1 or claim 2, wherein the measurement instrument is a lidar, a particle tracking velocimeter, a particle image velocimeter, a strain sensor, an accelerometer, a current meter, an acoustic emission detector, a seismic detector, a current meter, a temperature sensor, a distance division optical loss meter (OTDR), a DTS, a BOTRA, a BOTDR, a DAS, or a DVS.

14. The method for synchronizing transmission times of measurement-related signals in an energy conversion system according to claim 1 or 2, wherein the energy conversion system performs a diagnostic function or a prognostic function using the measurement results from the measuring device.

15. The method for synchronizing transmission times of measurement-related signals in an energy conversion system according to claim 1 or 2, wherein the energy conversion system provides a control function including predictive control or a safety function including EC or ESD.

16. The method for synchronizing the transmission time required for measurement-related signals in an energy conversion system as described in claim 1 or claim 2, wherein the sensor is a heart rate sensor or a behavior sensor capable of monitoring the state of a worker of the structure, or a position sensor capable of monitoring the position of a worker of the structure.

17. 2. The method for synchronizing the transmission time required for measurement-related signals in an energy conversion system as described in claim 1, wherein, in the energy conversion system, when the structure to be measured by the measuring instrument in the energy conversion system is a conductor or the energy conversion system performs measurements in an electromagnetic field, the error range of experimental or observational measurement results or empirical data is minimized using the electrical or optical measurement technique.

18. 2. The method for synchronizing the transmission time required for measurement-related signals in an energy conversion system as described in claim 1, wherein, in the energy conversion system, when the structure to be measured by the measuring instrument in the energy conversion system is a conductor or when the energy conversion system performs the measurement in an electromagnetic field, measurement results or verification data are generated by experiment or observation using the electrical or optical measurement technology, and the measurement results or verification data are processed or modified using situational awareness technology to minimize the error range of the measurement results or the verification data.

19. 19. The method for synchronizing the transmission times of measurement-related signals in an energy conversion system according to claim 17 or 18, wherein in the energy conversion system, an error range of the measurement results or the verification data is minimized using artificial intelligence or machine learning techniques.

20. The method for synchronizing transmission times of measurement-related signals in an energy conversion system according to claim 1 or 2, wherein the sensor is an optical fiber sensor that measures a temperature or a tension of the structure.

21. The method for synchronizing transmission times of measurement-related signals in an energy conversion system according to claim 1 or 2, wherein the energy conversion system is included in an offshore wind power generator, a tidal power generator, an ocean current power generator, or a hydroelectric power generator.

22. The method for synchronizing transmission times of measurement-related signals in an energy conversion system according to claim 1 or 2, wherein the energy conversion system includes a fuel production device that produces hydrogen fuel using water.

23. The energy conversion system includes: a reformer for extracting reformed gas; and a reformed gas liquefaction device for generating a liquefied reformed gas by liquefying the reformed gas transferred from the reformer, 2. The method for synchronizing the transmission times required for measurement-related signals in an energy conversion system as described in claim 1, wherein the heat exchanger receives cold energy contained in the liquefied fuel transferred from the fuel storage tank and the liquefied reformed gas transferred from the reformed gas liquefaction device, and transfers the received cold energy to a refrigerant, which is a material that can transfer thermal energy while maintaining a liquid phase.

24. The method for synchronizing transmission times of measurement-related signals in an energy conversion system according to claim 1 or 2, wherein the energy conversion system includes a reformer that extracts a reformed gas.

25. The method for synchronizing the transmission times of measurement-related signals in an energy conversion system according to claim 1 or 2, wherein the energy conversion system includes a reformed gas liquefaction device that produces a liquefied reformed gas by liquefying a reformed gas.

26. 2. The method for synchronizing transmission times of measurement-related signals in an energy conversion system according to claim 1, wherein the energy conversion system includes a fuel generating device that generates hydrogen fuel using water and supplies the generated hydrogen fuel to the fuel storage tank.

27. The method for synchronizing transmission times of measurement-related signals in an energy conversion system according to claim 1 or 2, wherein the liquefied fuel of the energy conversion system is supplied to an engine, an internal combustion engine, or a fuel cell.

28. 3. The method for synchronizing the transmission times of measurement-related signals in an energy conversion system according to claim 1 or 2, wherein the liquefied fuel of the energy conversion system is a fuel containing at least one of LPG, LNG, liquefied hydrogen, carbon, oxygen, nitrogen, and hydrogen.

29. 24. The method for synchronizing measurement-related signals of an energy conversion system according to claim 23, wherein the reformed gas includes at least one of hydrogen, oxygen, carbon, and nitrogen.

30. 24. The method for synchronizing measurement-related signal transmission times of an energy conversion system according to claim 23, wherein the reformed gas includes at least one of hydrogen gas, oxygen gas, carbon gas, hydrocarbons, or carbon oxides.

31. 3. The method for synchronizing transmission times of measurement-related signals in an energy conversion system according to claim 1 or 2, wherein a coolant of the energy conversion system is at least one of a liquefied fuel, an inert gas, ammonia, nitrogen, and an antifreeze.

32. The method for synchronizing transmission times of measurement-related signals in an energy conversion system according to claim 1 or 2, wherein the energy conversion system provides a control function including predictive control or a safety function including EC or ESD.

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