KR102105883B1 - Liquefied hydrogen fuel tank for drones and automobiles - Google Patents

Liquefied hydrogen fuel tank for drones and automobiles Download PDF

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Publication number
KR102105883B1
KR102105883B1 KR1020190140261A KR20190140261A KR102105883B1 KR 102105883 B1 KR102105883 B1 KR 102105883B1 KR 1020190140261 A KR1020190140261 A KR 1020190140261A KR 20190140261 A KR20190140261 A KR 20190140261A KR 102105883 B1 KR102105883 B1 KR 102105883B1
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inner tank
liquefied hydrogen
tank
liquefied
fuel tank
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KR1020190140261A
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Korean (ko)
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장진구
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장진구
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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
    • F17C3/00—Vessels not under pressure
    • F17C3/02—Vessels not under pressure with provision for thermal insulation
    • F17C3/08—Vessels not under pressure with provision for thermal insulation by vacuum spaces, e.g. Dewar flask
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/025—Special adaptations of indicating, measuring, or monitoring equipment having the pressure as the parameter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/04—Arrangement or mounting of valves
    • 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
    • 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
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/03—Thermal insulations
    • F17C2203/0391—Thermal insulations by vacuum
    • 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
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0602—Wall structures; Special features thereof
    • F17C2203/0612—Wall structures
    • F17C2203/0626—Multiple walls
    • F17C2203/0629—Two walls
    • 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
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F17C2205/0332—Safety valves or pressure relief valves
    • 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
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0338—Pressure regulators
    • 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
    • F17C2221/01—Pure fluids
    • F17C2221/012—Hydrogen
    • 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
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0165—Applications for fluid transport or storage on the road
    • F17C2270/0168—Applications for fluid transport or storage on the road by vehicles
    • 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
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0186—Applications for fluid transport or storage in the air or in space
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/32—Hydrogen storage

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The present invention relates to a liquefied hydrogen fuel tank with an improved function. An objective of the present invention is to prevent a reverse flow to an inner tank by evaporation of liquefied gas in a fuel supply line, and prevent a liquid temperature increase of the inner tank to allow long-term storage of liquefied gas. To achieve the objective, the liquefied hydrogen fuel tank with an improved function comprises: an inner tank (10) to store liquefied hydrogen; an outer tank (100) surrounding the inner tank (10) in vacuum; a vacuum port (110) to maintain an internal space of the outer tank (100) in vacuum; a liquefied hydrogen filling port (20) connected to fill liquefied hydrogen in the inner tank (10); a diaphragm (30) to divide the inside of the inner tank (10) into a plurality of spaces; a pressure gauge (40) to measure an internal pressure of the inner tank (10); a safety valve (50) connected to maintain a constant pressure of the inner tank (10); a supply line (60) to supply liquefied hydrogen stored in the inner tank (10); and a liquid trap unit (70) forming an S-shape to prevent a reverse flow in a process in which liquefied hydrogen stored in the inner tank (10) is supplied to the supply line.

Description

기능 개선형 액화수소 연료탱크{LIQUEFIED HYDROGEN FUEL TANK FOR DRONES AND AUTOMOBILES} Functionally improved hydrogen fuel tank {LIQUEFIED HYDROGEN FUEL TANK FOR DRONES AND AUTOMOBILES}

본 발명은 액화수소 연료탱크에 관한 것으로서, 더욱 상세하게는 드론 또는 여객이나 화물 운송용 차량(자동차, 트럭, 대형버스 등)의 연료로 사용되는 액화수소의 보다 안전한 저장상태를 유지할 수 있도록 하기 위한 기능 개선형 액화수소 연료탱크에 관한 것이다.The present invention relates to a liquefied hydrogen fuel tank, and more specifically, a function for maintaining a safer storage state of liquefied hydrogen used as fuel for a drone or a passenger or cargo transportation vehicle (car, truck, large bus, etc.) An improved liquefied hydrogen fuel tank.

일반적으로 정찰, 감시, 정밀 타격 등의 목적으로 군사 임무 수행을 위해 제작된 멀티 콥터(일명, '드론(Drone)'이라고 함)는 최근 재해감시, 물품이송, 영상촬영, 재난구조, 여객 운송 등을 비롯하여 그 목적과 방법에 따라서 민수 분야에서도 수요 및 활용도가 급격히 증가하고 있다.In general, multi-copters (referred to as 'Drones') designed to perform military missions for the purposes of reconnaissance, surveillance, and precision strike are recent disaster monitoring, transport of goods, imaging, disaster relief, passenger transportation, etc. In addition, demand and utilization are rapidly increasing in the private sector depending on its purpose and method.

특히 최근 몇 년간 각종 신기술 박람회와 전시회에서 가장 큰 이슈가 될 정도로 관심이 급증하고 있으며, 응용분야가 무궁무진하기 때문에 전 세계 항공 선진국과 IT 업계는 앞다투어 기술 개발을 위한 투자 및 연구개발에 박차를 가하고 있다.Especially in recent years, interest is rapidly increasing to be the biggest issue in various new technology fairs and exhibitions, and since the fields of application are endless, aviation advanced countries and the IT industry around the world are spearheading investment and R & D for technology development. .

이러한 드론은 산악 지역과 같이 사람이 접근하기 어려운 지역의 관찰이 가능하며, 특히 저고도 비행으로 인한 우수한 시인성으로 정밀 관찰을 수행할 수 있는 장점이 있다. 또한, 저고도 비행으로 레이더망을 피하면서 침투가 용이하다는 점에서 군사용으로도 크게 주목 받고 있다.These drones are capable of observing areas inaccessible to humans, such as mountainous areas, and have the advantage of performing precise observations with excellent visibility due to low altitude flight. In addition, it is attracting much attention for military use in that it is easy to penetrate while avoiding the radar network by low altitude flight.

드론은 체공시간과 항속거리에 따라 그 활용 범위와 사용 목적이 결정될 수 있는데, 체공시간과 항속거리는 동력원에 따라 달라질 수 있다. 종래 드론에서는 일반적으로 동력원으로 충전 가능한 이차전지를 주로 사용하였으며, 경우에 따라 내연기관을 사용하기도 하였다.The drone's range and purpose of use can be determined according to flight time and range, but flight time and range can vary depending on the power source. In a conventional drone, a rechargeable battery that is generally rechargeable as a power source is mainly used, and in some cases, an internal combustion engine is also used.

그러나 이차전지를 동력원으로 사용할 경우 충전에 많은 시간이 소요되고 완전 충전을 해도 수분에서 십 여분밖에 날지 못해 항속거리나 용도에 제한이 있을 수밖에 없으며, 내연기관은 체공시간이나 항속거리 확보 측면에서 유리함이 있으나 경량화 요구를 만족시키기 어렵고 큰 소음이 문제가 된다.However, when a secondary battery is used as a power source, it takes a lot of time to charge, and even when fully charged, it can fly only a few tens of minutes, so there is no choice but to limit the range or use, and the internal combustion engine is advantageous in terms of securing flight time or range. However, it is difficult to satisfy the demand for light weight and loud noise is a problem.

이에 따라 근래에는 항속거리와 체공시간을 충분히 확보할 수 있으면서 소음이 적은 연료 전지(Fuel cell)를 동력원으로 사용하는 대안이 논의되고 있다. 이는 연료인 수소(H2)를 공기 중의 산소(O2)와 반응시켜 비행에 필요한 전기에너지를 발생시켜 추력 발생용 로터 회전모터에 공급하는 것이다.Accordingly, in recent years, alternatives to using a fuel cell (Fuel cell) with low noise while being able to secure a sufficient range and flight time have been discussed. This is supplied to the rotor for rotating thrust motor generates the electric energy necessary for the fuel it is a hydrogen (H 2) the air in flight is reacted with oxygen (O 2) of the.

드론의 대안 동력원으로 고려되는 연료 전지는, 기체 또는 액체 상태의 수소 연료를 저장하는 연료탱크(Fuel Tank)와, 연료탱크에서 공급되는 수소를 공기 중 산소와 반응시켜 전기에너지를 생산하는 연료 전지 스택(Fuel Cell Stack)을 포함한다.A fuel cell considered as an alternative power source for a drone includes a fuel tank that stores hydrogen fuel in a gas or liquid state, and a fuel cell stack that produces electric energy by reacting hydrogen supplied from the fuel tank with oxygen in the air. (Fuel Cell Stack).

도 1에는 종래 기술에 따른 액화수소 연료탱크가 탑재된 드론의 외관 사시도를 나타낸 것이다.1 is a perspective view showing the appearance of a drone equipped with a liquefied hydrogen fuel tank according to the prior art.

즉, 도 1에 도시된 바와 같이, 수소 연료 전지는 주로 드론의 중앙부 비행 몸체(10)에 탑재된다. 이때 연료 전지는 전술한 바와 같이, 연료인 수소가 저장되는 액화수소 연료탱크(11)와, 액화수소 연료탱크(11)로부터 공급되는 수소를 이용하여 실질적으로 기체 기동용 전기를 생산해내는 연료 전지 스택(12)으로 구성된다.That is, as shown in Figure 1, the hydrogen fuel cell is mainly mounted on the central flight body 10 of the drone. At this time, the fuel cell, as described above, using a hydrogen liquefied fuel tank 11 in which hydrogen is stored, and hydrogen supplied from the liquefied hydrogen fuel tank 11, a fuel cell stack that substantially produces electricity for starting a gas (12).

이러한 드론 또는 자동차 등에 탑재되는 일반적인 액화수소 연료탱크의 경우 약 -253℃의 초저온 액화수소가스(Liqued hydrogen Gas; L-H2)를 저장 또는 운반하기 위한 것으로 액화수소가스를 밀폐하기 위해 외조탱크와 내조탱크의 2중 구조를 이루고 있다.In the case of a general liquefied hydrogen fuel tank mounted on such a drone or a vehicle, it is for storing or transporting cryogenic liquefied hydrogen gas (LH 2 ) at about -253 ° C. It has a double structure.

그러나 종래 기술에서의 액화수소 연료탱크는 액체가스가 공급라인을 통해 공급되는 과정에서 액체 증발이 되어서 일부 연료가 내조탱크의 액체가스 속으로 역류되어 액온도 상승의 원인이 되고 압력상승으로 인한 장기간 보관에 어려움이 있는 문제점이 있었다.However, in the prior art, the liquefied hydrogen fuel tank is liquid evaporated in the process in which the liquid gas is supplied through the supply line, and some fuel flows back into the liquid gas of the inner tank, causing a rise in liquid temperature and long-term storage due to pressure rise. There was a problem with difficulty.

또한 액체 수소의 비중이 낮아 승압 및 압력 유지가 어렵고 액체가 용기 내부에서 유동이 있을 경우에도 승압 및 압력 유지에 어려움이 있어 드론 택시와 차량에 탑재하기에 어려움이 있었다.In addition, since the specific gravity of liquid hydrogen is low, it is difficult to maintain pressure and pressure, and even when liquid flows inside the container, it is difficult to maintain pressure and pressure, making it difficult to mount on drone taxis and vehicles.

대한민국 특허공개 제2019-96559호(2019.08.20.공개)Republic of Korea Patent Publication No. 2019-96559 (published on August 20, 2019) 대한민국 특허공개 제2019-49192호(2019.05.09.공개)Republic of Korea Patent Publication No. 2019-49192 (published May 9, 2019)

본 발명은 상기한 종래 기술에서의 문제점을 개선하기 위해 제안된 것으로서, 연료 공급라인에서 액체가스의 증발에 따른 내조탱크로의 역류현상 발생을 방지할 수 있도록 함으로써 내조탱크의 액온도 상승을 방지함과 함께 액체가스의 장기간 보관이 가능하도록 하는데 목적이 있으며, 어떠한 조건에서도 내조 탱크의 좌,우측 열교환기에 의해 내부 압력이 일정한 수준으로 유지될 수 있도록 하는데 그 목적이 있다.The present invention has been proposed to improve the problems in the prior art described above, and prevents the rise of the liquid temperature of the inner tank by preventing the backflow phenomenon from the fuel supply line to the inner tank due to evaporation of liquid gas. In addition, the purpose is to enable long-term storage of the liquid gas, and the purpose is to maintain the internal pressure at a constant level by the left and right heat exchangers of the inner tank under any conditions.

상기 목적을 이루기 위한 본 발명의 드론 및 자동차용 액화수소 연료탱크는, 액화수소의 보관이 이루어지는 내조탱크와; 상기 내조탱크를 진공으로 둘러싸며 구성되는 외조탱크와; 상기 외조탱크 내부공간을 진공으로 유지시키기 위해 구비된 진공포트와; 상기 내조탱크로 액화수소를 충전하기 위해 연결 구비되는 액화수소 충전구와; 상기 내조탱크 내부를 다수로 구획하기 위해 구비된 격막과; 상기 내조탱크의 내부압력 측정이 이루어지는 압력게이지와; 상기 내조탱크의 압력을 일정하게 유지시키기 위해 연결된 안전밸브와; 상기 내조탱크에 보관되는 액화수소를 공급하는 공급라인과; 상기 내조탱크에 보관되는 액화수소가 공급라인으로 공급되는 과정에서 역류를 방지하기 위해 구비되는 액트랩부를 포함하는 구성을 이루는 것을 특징으로 한다.The drone and the liquefied hydrogen fuel tank for automobiles of the present invention for achieving the above object include an inner tank in which liquefied hydrogen is stored; An outer tank configured to surround the inner tank with a vacuum; A vacuum port provided to maintain the inner space of the outer tank in a vacuum; A liquefied hydrogen filling port provided for connecting liquefied hydrogen to the inner tank; A diaphragm provided to divide the inner tank into a plurality of sections; A pressure gauge for measuring the internal pressure of the inner tank; A safety valve connected to keep the pressure of the inner tank constant; A supply line for supplying liquefied hydrogen stored in the inner tank; It characterized in that it comprises a liquid trap portion provided to prevent backflow in the process of supplying the liquefied hydrogen stored in the inner tank to the supply line.

이러한 본 발명의 액화수소 연료탱크는, 드론 또는 차량(자동차, 트럭, 대형버스 등)에 설치가 이루어졌을 때 연료 공급라인에서 액체가스의 증발에 따른 내조탱크로의 역류현상 발생을 방지하고 내조탱크의 액온도 상승을 방지하여 액체가스의 장기간 보관이 가능한 효과를 나타낸다.The liquefied hydrogen fuel tank of the present invention, when installed on a drone or a vehicle (automobile, truck, large bus, etc.) prevents backflow from the fuel supply line to the inner tank due to evaporation of liquid gas and prevents the inner tank It prevents the increase of the liquid temperature of and shows the effect that the liquid gas can be stored for a long time.

특히, Full 충전 시 4시간 동안 연속적으로 사용이 가능하며, 연료가 빠르게 소진해도 내조 탱크의 좌,우에 구성된 열교환기에 의해 일정한 압력이 유지되어 공급이 이루어지는 이점을 나타낸다.In particular, it can be used continuously for 4 hours when fully charged, and it shows the advantage that supply is made by maintaining constant pressure by the heat exchangers configured on the left and right sides of the inner tank even when the fuel is quickly exhausted.

도 1은 일반적인 액화수소 연료탱크가 탑재된 드론의 외관 사시도.
도 2는 본 발명의 일 실시 예에 따른 액화수소 연료탱크 개략 구조도.
도 3은 본 발명에서 액트랩부 상세 구조도.
도 4는 본 발명에서 내조탱크 내부의 열교환 코일 구조도.
도 5는 본 발명의 다른 실시 예에 따른 액화수소 연료탱크가 다수개로 구비된 상태 구조도.1 is an external perspective view of a drone equipped with a general liquefied hydrogen fuel tank.
2 is a schematic structural diagram of a liquefied hydrogen fuel tank according to an embodiment of the present invention.
3 is a detailed structural diagram of the act trap in the present invention.
Figure 4 is a heat exchange coil structure inside the inner tank in the present invention.
5 is a state structure diagram of a plurality of liquefied hydrogen fuel tanks according to another embodiment of the present invention.

이하, 본 발명의 구체적인 실시 예를 첨부 도면을 참조하여 상세히 살펴보기로 한다.Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.

본 발명의 실시 예는 여러 가지 형태로 변형될 수 있으며, 본 발명의 범위가 아래에서 상세히 설명하는 실시 예로 한정되는 것으로 해석되어서는 안 된다. 본 실시 예는 당 업계에서 평균적인 지식을 가진 자에게 본 발명을 더욱 완전하게 설명하기 위하여 제공되는 것이다.The embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be interpreted as being limited to the embodiments described in detail below. This embodiment is provided to more fully describe the present invention to those skilled in the art.

따라서, 도면에서 표현한 구성요소의 형상 등은 더욱 명확한 설명을 강조하기 위해서 과장되어 표현될 수 있다. 각 도면에서 동일한 구성은 동일한 참조부호로 도시한 경우가 있음을 유의하여야 한다. 또한, 본 발명의 요지를 불필요하게 흐릴 수 있다고 판단되는 공지 기술의 기능 및 구성에 관한 상세한 설명은 생략될 수 있다.Accordingly, the shape of the components expressed in the drawings may be exaggerated to emphasize a more clear description. It should be noted that the same configuration in each drawing may be indicated by the same reference numeral. In addition, detailed descriptions of functions and configurations of well-known technologies that are determined to unnecessarily obscure the subject matter of the present invention may be omitted.

먼저, 본 발명의 일 실시 예에 따른 드론 및 자동차용 액화수소 연료탱크의 구조를 도 2 및 도 3을 통해 살펴보면 다음과 같다.First, the structure of a drone and a liquefied hydrogen fuel tank for an automobile according to an embodiment of the present invention will be described with reference to FIGS. 2 and 3 as follows.

본 실시 예에서의 액화수소 연료탱크는, 원통형상을 이루어 초저온의 액화수소의 보관이 이루어지는 내조탱크(10)와, 상기 내조탱크(10)를 진공으로 둘러싸며 구성되는 외조탱크(100)와, 상기 외조탱크(100) 내부공간을 진공으로 유지시키기 위해 연결 구비된 진공포트(110)와, 상기 내조탱크(10)로 초저온의 액화수소를 충전하기 위해 연결 구비되는 액화수소 충전구(20)와, 상기 내조탱크(10) 내부를 다수로 구획하기 위해 좌우 양측에 구비된 격막(30)과, 상기 내조탱크(10)의 내부압력 변화를 확인하기 위한 압력게이지(40)와, 상기 내조탱크(10)의 압력을 일정하게 유지시키기 위해 연결된 안전밸브(50)와, 상기 내조탱크(10)에 보관되는 액화수소를 공급하는 공급라인(60)과, 상기 내조탱크(10)에 보관되는 액화수소가 공급라인으로 공급되는 과정에서 기체의 역류를 방지하기 위해 "S"형상을 이루어 구비되는 액트랩부(70)로 구성된다.In the present embodiment, the liquefied hydrogen fuel tank is formed of a cylindrical shape, an inner tank 10 for storing ultra-low temperature liquefied hydrogen, and an outer tank 100 configured to surround the inner tank 10 with vacuum, A vacuum port 110 provided for connection to maintain the inner space of the outer tank 100 as a vacuum, and a liquefied hydrogen filling port 20 provided for connection to the cryogenic liquefied hydrogen with the inner tank 10 , In order to divide the inner tank 10 into a plurality of partitions, the diaphragm 30 provided on both right and left sides, a pressure gauge 40 for confirming a change in the internal pressure of the inner tank 10, and the inner tank ( 10) a safety valve 50 connected to maintain a constant pressure, a supply line 60 supplying liquefied hydrogen stored in the inner tank 10, and liquefied hydrogen stored in the inner tank 10 Gas flow in the process of being supplied to the supply line It consists of a liquid trap portion 70 to be made having an "S" shape to prevent.

그리고 상기 액트랩부(70)의 배출 측에 연결되는 연결관은 극저온의 액화가스가 외기와의 열교환에 따른 증발작용이 이루어질 수 있도록 외조탱크(100)의 바닥면에 밀착 구비된 액 증발용 기화기(71)를 이루게 된다.In addition, the connection pipe connected to the discharge side of the liquid trap portion 70 is provided with a vaporizer for evaporation of liquid provided in close contact with the bottom surface of the outer tank 100 so that the cryogenic liquefied gas can be evaporated by heat exchange with the outside air. (71).

또한, 상기 내조탱크(10) 하부에는 액화가스의 압력을 유지시키기 위해 일정 압력이 세팅되어지는 레귤레이터(R)가 연결 구성된다.In addition, a regulator R having a constant pressure set to maintain the pressure of the liquefied gas is connected to the lower portion of the inner tank 10.

또한, 상기 격막(30)에 의해 구획된 내조탱크(10)의 양측에는 기화된 가스의 유입시 내조탱크(10) 내부에 저장된 액화수소와 열교환 작용이 이루어질 수 있도록 열교환코일(80)이 구성된다.In addition, heat exchange coils 80 are configured on both sides of the inner tank 10 partitioned by the diaphragm 30 to exchange heat with liquefied hydrogen stored in the inner tank 10 when the vaporized gas is introduced. .

상기 액화수소의 공급 유로에는 가스의 공급을 통한 압력 조절이 이루어질 수 있도록 가스공급밸브(90)가 연결 구성된다.A gas supply valve 90 is configured to be connected to the supply passage of the liquefied hydrogen so that pressure can be adjusted through supply of gas.

도면 중 미설명 부호 35는 액체 레벨 센서이고, 51은 기체밸브를 각각 나타낸다.In the drawing, reference numeral 35 denotes a liquid level sensor, and 51 denotes a gas valve, respectively.

이와 같은 구성을 이루는 본 발명 액화수소 연료탱크의 적용에 따른 작용효과를 살펴보기로 한다.The effect of the application of the liquefied hydrogen fuel tank of the present invention constituting such a configuration will be described.

본 발명의 액화수소 연료탱크는 드론, 자동차, 트럭 또는 대형버스 등의 운송수단에 탑재되어 수소 연료의 효율적인 공급이 이루어질 수 있게 된다.The liquefied hydrogen fuel tank of the present invention is mounted on a transportation means such as a drone, a car, a truck, or a large bus, so that efficient supply of hydrogen fuel can be achieved.

즉, 액화수소 충전구(20)를 통해 충전된 초저온의 액화수소는 내조탱크(10) 내에 일정 수위로 보관되는 과정에서 공급유로 및 공급라인(60)을 통한 연료 공급이 이루어지게 되며, 이러한 공급 과정에서 공급유로를 이루는 액트랩부(70)에서는 도 3에서와 같이 액화가스의 정체 상태를 이루게 된다.That is, the cryogenic liquefied hydrogen charged through the liquefied hydrogen filling port 20 is supplied with fuel through the supply flow path and the supply line 60 in the process of being stored at a constant water level in the inner tank 10. In the process, the act trap portion 70 forming the supply flow path forms a stagnant state of liquefied gas as shown in FIG. 3.

이에 따라 공급유로 내에서 가스의 유통이 액트랩부(70)에서 A측 유로와 B측 유로의 공간적인 차단이 이루어지게 되어 액화수소의 증발로 인한 내조탱크(10) 내부의 액온도가 상승되는 현상 및 이에 따른 압력상승이 방지될 수 있게 됨을 알 수 있다.Accordingly, the flow of gas in the supply flow path causes the spatial blocking of the A-side flow path and the B-side flow path in the liquid trap portion 70, so that the liquid temperature inside the inner tank 10 due to evaporation of liquefied hydrogen increases. It can be seen that the phenomenon and thus the pressure rise can be prevented.

또한, 액증발용 기화기(71)는 외주탱크(100)의 내부 바닥면에 밀착되어 있기 때문에 액화수소가 액증발용 기화기(71)를 경유하는 과정에서 외기와의 열교환 작용에 따른 증발이 이루어질 수 있게 된다.In addition, since the vaporizer for liquid evaporation 71 is in close contact with the inner bottom surface of the outer circumferential tank 100, evaporation may occur due to heat exchange with external air in the process of liquefied hydrogen passing through the vaporizer for liquid vaporization 71. There will be.

한편, 연료탱크에 액화가스를 충전 후 사용하기 위해서는 높은 압력이 필요한데, 이때에는 레귤레이터(R)를 통하여 일정 압력을 세팅해 놓으면 필요에 따라 안전밸브(50)의 개폐동작이 이루어짐으로써 연료탱크의 압력이 필요압력까지 상승제어가 이루어질 수 있게 된다.On the other hand, a high pressure is required to use the liquefied gas after filling it in the fuel tank. At this time, if a certain pressure is set through the regulator R, the opening and closing operation of the safety valve 50 is performed as necessary, thereby causing the pressure of the fuel tank. Upward control can be achieved up to this required pressure.

그리고, 레귤레이터(R)에 의해 압력 상승이 이루어졌으나 계속 사용하기 위해서는 압력유지가 필수적인데, 내조탱크(10) 내부에는 격막(30)의 외측으로 좌,우 양측에 열교환코일(80)이 구비되어 있기 때문에 액증발용 기화기(71)로부터 기화된 가스가 열교환코일(80)로 유입되면 액화수소의 열을 빼앗게 되므로 인한 액화수소의 증발이 이루어져 압력이 유지될 수 있게 된다.And, although the pressure rise is made by the regulator (R), it is essential to maintain the pressure in order to continue to use. Inside the inner tank 10, heat exchange coils 80 are provided on both left and right sides of the diaphragm 30. Therefore, when the gas vaporized from the vaporizer 71 for evaporation flows into the heat exchange coil 80, the heat of the liquefied hydrogen is deprived, so that the pressure of the liquefied hydrogen is evaporated to maintain the pressure.

또한, 가스공급밸브(90)는 연료탱크의 압력이 높으면 탱크 상부의 기체를 공급하여 압력을 낮추고, 압력이 낮으면 탱크의 하부에 연결된 액배관을 통해서 가스가 공급되도록 하는 기능을 수행하게 된다.In addition, the gas supply valve 90 performs a function of supplying gas at the top of the tank to lower the pressure when the pressure of the fuel tank is high, and supplying gas through a liquid pipe connected to the bottom of the tank when the pressure is low.

따라서, 본 발명의 액화수소 연료탱크는 드론 또는 자동차에 설치가 이루어졌을 때 연료 공급라인에서 액체가스의 증발에 따른 내조탱크로의 역류현상 발생을 방지하고 내조탱크의 액온도 상승을 방지하여 액체가스의 장기간 보관이 가능한 효과를 나타내게 된다.Therefore, the liquefied hydrogen fuel tank of the present invention prevents the occurrence of backflow from the fuel supply line to the inner tank due to evaporation of the liquid gas when installed in a drone or a vehicle and prevents the liquid temperature from rising in the inner tank. It has the effect of long-term storage.

한편, 도 5는 본 발명의 다른 실시 예에 따른 구성을 나타낸 것으로서, 본 발명의 액화수소 연료탱크(개별 100~200L 용량) 다수개를 연결하여 트럭 또는 대형버스에 사용한 형태를 나타낸 것이다.On the other hand, Figure 5 shows a configuration according to another embodiment of the present invention, a plurality of liquefied hydrogen fuel tanks (individual 100 ~ 200L capacity) of the present invention is connected to show the form used for a truck or a large bus.

특히, 각각의 연료탱크 내에 구비되는 열교환코일(80)은 열교환 효율 향상을 위해 에폭시 섬유유리 재질의 단열파이프(81) 내부에 삽입된 구조를 이루는 것을 확인할 수 있다.In particular, it can be seen that the heat exchange coils 80 provided in each fuel tank form a structure inserted inside the heat insulating pipe 81 made of an epoxy fiberglass to improve heat exchange efficiency.

또한, 단열파이프(81)의 외표면에는 단열효율 향상 및 내구성 보강을 위한 보강 코팅층(81a)이 코팅 형성되되, 상기 보강 코팅층(81a)은 내열 특성 강화를 위한 열가소성 엘라스토머 20~40중량%, 절연효율을 위한 에폭시 수지 10~30중량%, 살균 기능성의 나노은 10~30중량%, 열가소성 엘라스토머 성분의 활성화를 위한 파라핀왁스 1~10중량%, 코팅층의 강도 강화를 위한 규산바륨 1~10중량%, 카올린 1~10중량%, 헥토라이트 1~5중량%, 부틸렌글라이콜 1~5중량%의 혼합 조성을 이룸이 바람직하다.In addition, a reinforced coating layer 81a is formed on the outer surface of the insulating pipe 81 to improve heat insulation efficiency and to reinforce durability, and the reinforced coating layer 81a is 20 to 40% by weight of a thermoplastic elastomer for enhancing heat resistance, insulation 10-30% by weight of epoxy resin for efficiency, 10-30% by weight of nano silver for sterilizing functionality, 1-10% by weight of paraffin wax for activation of thermoplastic elastomer components, 1-10% by weight of barium silicate for strengthening the strength of the coating layer, It is preferable to have a mixed composition of 1-10% by weight of kaolin, 1-5% by weight of hectorite, and 1-5% by weight of butylene glycol.

이와 같은 구성을 이루게 되면, 열교환코일(80)이 단열파이프(81)에 의해 보호됨으로써 열교환 효율이 향상될 수 있게 되며, 단열파이프(81)에는 보강 코팅층(81a)이 형성되어 있기 때문에 화학 작용에 의한 부식 또는 외부 충격으로 인한 크랙 발생이 방지될 수 있는 이점을 나타낸다.When such a configuration is achieved, the heat exchange efficiency of the heat exchange coil 80 can be improved by being protected by the heat insulating pipe 81, and the heat insulating coil 81 has a reinforcing coating layer 81a, so that chemical reaction is possible. It shows the advantage that can prevent the occurrence of cracks due to corrosion or external impact.

특히, 보강 코팅층(81a)에는 카올린이 첨가되어 있기 때문에 코팅층이 전체적으로 균일한 두께를 유지할 수 있으며, 헥토라이트는 에폭시 수지의 뭉침현상을 방지할 수 있고, 부틸렌글라이콜은 전체적인 혼합물간의 결합력을 강화하는 기능을 수행하게 된다.In particular, since kaolin is added to the reinforcing coating layer 81a, the coating layer can maintain a uniform thickness as a whole, hectorite can prevent agglomeration of the epoxy resin, and butylene glycol strengthens the bonding force between the whole mixtures. To perform the function.

그리고 상기에서 본 발명의 특정한 실시 예가 설명 및 도시되었지만 본 발명의 액화수소 연료탱크의 구조가 당업자에 의해 다양하게 변형되어 실시될 수 있음은 자명한 일이다. And although a specific embodiment of the present invention has been described and illustrated above, it is obvious that the structure of the liquefied hydrogen fuel tank of the present invention can be implemented by various modifications by those skilled in the art.

그러나 이와 같은 변형된 실시 예들은 본 발명의 기술적 사상이나 범위로부터 개별적으로 이해되어져서는 안되며, 이와 같은 변형된 실시 예들은 본 발명의 첨부된 특허청구범위 내에 포함된다 해야 할 것이다.However, such modified embodiments should not be individually understood from the technical spirit or scope of the present invention, and such modified embodiments should be included in the appended claims of the present invention.

10 : 내조탱크 20 : 액화수소 충전구
30 : 격막 40 : 압력게이지
50 : 안전밸브 60 : 공급라인
70 : 액트랩부 71 : 액증발용 기화기
80 : 열교환코일 90 : 가스공급밸브
100 : 외조탱크 110 : 진공포트10: inner tank 20: liquefied hydrogen filling port
30: diaphragm 40: pressure gauge
50: Safety valve 60: Supply line
70: act trap portion 71: vaporizer for evaporation of liquid
80: heat exchange coil 90: gas supply valve
100: outer tank 110: vacuum port

Claims (7)

액화수소의 보관이 이루어지는 내조탱크(10)와;
상기 내조탱크(10)를 진공으로 둘러싸며 구성되는 외조탱크(100)와;
상기 외조탱크(100) 내부공간을 진공으로 유지시키기 위해 구비된 진공포트(110)와;
상기 내조탱크(10)로 액화수소를 충전하기 위해 연결 구비되는 액화수소 충전구(20)와;
상기 내조탱크(10) 내부를 다수로 구획하기 위해 구비된 격막(30)과;
상기 내조탱크(10)의 내부압력 측정이 이루어지는 압력게이지(40)와;
상기 내조탱크(10)의 압력을 일정하게 유지시키기 위해 연결된 안전밸브(50)와;
상기 내조탱크(10)에 보관되는 액화수소를 공급하는 공급라인(60)과;
상기 내조탱크(10)에 보관되는 액화수소가 공급라인으로 공급되는 과정에서 역류를 방지하기 위해 "S"형상을 이루어 구비되는 액트랩부(70);를 포함하고,
상기 격막(30)에 의해 구획된 내조탱크(10)의 양측에는 기화된 가스의 유입시 내조탱크(10) 내부에 저장된 액화수소와 열교환 작용이 이루어질 수 있도록 열교환코일(80)이 구성된 것을 특징으로 하는 특징으로 하는 기능 개선형 액화수소 연료탱크.An inner tank 10 in which liquefied hydrogen is stored;
An outer tank 100 configured to surround the inner tank 10 with a vacuum;
A vacuum port 110 provided to maintain the inner space of the outer tank 100 in a vacuum;
A liquefied hydrogen filling port 20 provided to be connected to the liquefied hydrogen with the inner tank 10;
A diaphragm 30 provided to partition the inner tank 10 into a plurality;
A pressure gauge 40 for measuring the internal pressure of the inner tank 10;
A safety valve 50 connected to maintain the pressure of the inner tank 10 constant;
A supply line 60 for supplying liquefied hydrogen stored in the inner tank 10;
Including the liquid trap portion 70 provided in the shape of an "S" in order to prevent backflow in the process of supplying the liquefied hydrogen stored in the inner tank 10 to the supply line;
A heat exchange coil 80 is configured on both sides of the inner tank 10 partitioned by the diaphragm 30 to exchange heat with liquefied hydrogen stored in the inner tank 10 when the vaporized gas flows in. Features improved liquefied hydrogen fuel tank. 청구항 1에 있어서,
상기 액트랩부(70)의 배출 측에 연결되는 연결관은 극저온의 액화가스가 외기와의 열교환에 따른 증발작용이 이루어질 수 있도록 외조탱크(100)의 바닥면에 밀착 구비된 액 증발용 기화기(71)를 이루는 것을 특징으로 하는 기능 개선형 액화수소 연료탱크.The method according to claim 1,
The connecting pipe connected to the discharge side of the liquid trap portion 70 is a vaporizer for liquid evaporation (closed to the bottom surface of the outer tank 100) so that the cryogenic liquefied gas can be evaporated by heat exchange with the outside air ( 71) the improved functional hydrogen fuel tank, characterized in that to achieve. 청구항 1에 있어서,
상기 내조탱크(10) 하부에는 액화가스의 압력을 유지시키기 위해 일정 압력이 세팅되어지는 레귤레이터(R)가 연결 구성된 것을 특징으로 하는 기능 개선형 액화수소 연료탱크.The method according to claim 1,
A function improvement type liquefied hydrogen fuel tank comprising a regulator (R) in which a constant pressure is set to maintain a pressure of liquefied gas under the inner tank (10). 삭제delete 청구항 1에 있어서,
상기 액화수소의 공급 유로에는 가스의 공급을 통한 압력 조절이 이루어질 수 있도록 가스공급밸브(90)가 연결 구성된 것을 특징으로 하는 기능 개선형 액화수소 연료탱크.The method according to claim 1,
A functional improvement type liquefied hydrogen fuel tank, characterized in that a gas supply valve 90 is connected to the supply passage of the liquefied hydrogen so that pressure adjustment through supply of gas can be achieved. 청구항 1에 있어서,
상기 열교환코일(80)은 열교환 효율 향상을 위해 에폭시 섬유유리 재질의 단열파이프(81) 내부에 삽입된 구조를 이루는 것을 특징으로 하는 기능 개선형 액화수소 연료탱크.The method according to claim 1,
The heat exchange coil 80 is a functional improvement type liquefied hydrogen fuel tank, characterized in that it forms a structure inserted inside the insulating pipe 81 made of an epoxy fiberglass material to improve heat exchange efficiency. 청구항 6에 있어서,
상기 단열파이프(81)의 외표면에는 단열효율 향상 및 내구성 보강을 위한 보강 코팅층(81a)이 코팅 형성되되, 상기 보강 코팅층(81a)은 열가소성 엘라스토머, 에폭시 수지, 나노은, 파라핀왁스, 규산바륨, 카올린, 헥토라이트, 부틸렌글라이콜의 혼합 조성을 이루는 것을 특징으로 하는 기능 개선형 액화수소 연료탱크.The method according to claim 6,
A reinforced coating layer 81a is formed on the outer surface of the insulating pipe 81 to improve insulation efficiency and to reinforce durability, and the reinforced coating layer 81a is a thermoplastic elastomer, epoxy resin, nano silver, paraffin wax, barium silicate, kaolin , Hectorite, Butylene glycol, improved functional liquefied hydrogen fuel tank, characterized in that to form a mixed composition.
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