Large Scale Liquid Hydrogen Storage is the key link for hydrogen energy to realize wide application. Fullcryo provides liquid hydrogen storage tank solutions to help more enterprises to break through hydrogen energy development.
Hydrogen energy will play a key role in the future energy mix. It can provide power for small electronic devices, large aircraft, buildings and other types of facilities, effectively meet the diversified power generation needs, and become an important bridge for the deep integration of renewable energy.
The surplus electricity generated by electrolysis of renewable energy can be converted into hydrogen for storage. This approach not only realizes the effective regulation of energy, but also avoids energy loss over time as in the case of battery energy storage, enabling hydrogen to be produced and stored on an industrial scale and becoming a reliable backup energy source.
In the transportation sector, hydrogen energy systems can provide a large amount of energy storage, paired with small capacity batteries as a buffer, which enables regenerative braking to meet sudden high power demands and extends the service life of hydrogen fuel cells. Currently, this complementary model has been applied in some commercial vehicles, such as the Honda FCX Clarity hydrogen fuel vehicle.
Hydrogen can be compressed into a gaseous state and stored in tanks at pressures up to 350 – 700 bar (5,000 – 10,000 psi). This method is more common, but due to the low density of hydrogen, the storage capacity is limited and the pressure resistance of the tanks is extremely high.
Storage principle and advantages: Hydrogen is cooled to -252.8°C and converted to liquid storage. Liquid hydrogen has a much higher energy density than gaseous hydrogen, allowing for more efficient energy storage. However, cooling hydrogen to such low temperatures is costly. Special requirements for storage tanks: To prevent liquid hydrogen from evaporating due to heat transfer, convection, or heat absorption by radiation, the tanks and associated facilities must be well insulated, which undoubtedly increases the technical difficulty and cost of storage.
Combining both compression and cryogenic cooling, hydrogen is first cooled and then compressed, resulting in higher energy density than compression alone. However, similar to cryogenic liquid storage, this method also requires a large amount of energy.
Fullcryo has developed a 40m3 liquid hydrogen mobile storage tank, which can meet the requirement of zero hydrogen evaporation emission during 7 days/1000km of vehicle transportation.
Fullcryo has developed a 100m3 zero evaporation liquid hydrogen storage tank, based on small cryogenic chiller technology, which ensures zero hydrogen evaporation emissions during long-term operation.
Liquid hydrogen dewars are optimized to minimize the loss of liquid hydrogen during storage, transportation and distribution. The Dewar adopts key cryogenic technologies such as high efficiency vacuum insulation cladding technology, steam cooling multi-cooling screen technology and low temperature condensation and adsorption to effectively reduce the evaporation rate of liquid hydrogen.
Structural features:
Liquid hydrogen storage and transportation hydrogen stations offer higher efficiency and lower costs. Since the compressibility of liquid is much lower than that of gas, the outlet pressure of high pressure liquid hydrogen piston pump used for liquid hydrogen pressurization can reach 875 bar, and the energy consumption is much lower than that of hydrogen compressor with the same pressurization capacity. At present, about 1/3 of the more than 400 oxygen filling stations in the world have adopted liquid hydrogen for storage and transportation. The construction of hydrogen station using liquid hydrogen storage and transportation, the construction and operation cost of hydrogen station using liquid oxygen storage and transportation is low, which is more conducive to the infrastructure of hydrogen station, and is conducive to the virtuous circle of hydrogen fuel cell vehicle and oxygen station construction, while liquid oxygen storage and transportation has an important role in the future hydrogen industry chain, and is the inevitable means of the large-scale application of hydrogen fuel cell vehicle industry.
Liquid hydrogen has been used as a rocket fuel in space missions for decades. Its high energy density and efficient combustion characteristics make it ideal for propelling spacecraft into the air, and the National Aeronautics and Space Administration (NASA) has long relied on liquid hydrogen for space exploration.
Hydrogen-powered vehicles, especially those using fuel cells, are on the rise. Liquid hydrogen provides sufficient fuel supply for heavy vehicles, such as buses and trucks, and is expected to replace traditional fuels, realizing the green transformation of the transportation sector.
In the industrial field, liquid hydrogen is widely used in metal refining, fertilizer production and other processes, and is a key component of many chemical reactions, which is crucial to industrial development.
Liquid hydrogen plays an important role in renewable energy storage and grid stabilization. When renewable energy sources such as solar and wind generate excess electricity, it can be converted to hydrogen and liquefied for storage. During peak electricity consumption, the hydrogen is then converted into electricity, effectively easing the pressure on the power grid.
Maintaining the storage conditions of liquid hydrogen requires a large amount of energy, which not only increases the cost of storage, but also restricts the large-scale popularization of liquid hydrogen storage technology.
Rigorous equipment testing: To ensure safe storage, all equipment, from tanks to cylinders, needs to be rigorously tested to ensure that it can withstand the conditions of actual use. Advanced monitoring technology: Since hydrogen is very easy to leak through tiny gaps, it is necessary to monitor the status of the equipment in real time with the help of bottle control technology and other advanced means, so that potential problems, such as tiny cracks, can be found and dealt with in a timely manner.
Liquid hydrogen storage equipment must meet the requirements for operation in extreme low-temperature environments and strictly follow the relevant norms and standards, which poses a high challenge to the design and manufacture of the equipment.
Hydrogen has a flammability range of 4% – 7% and requires very little energy to ignite. Therefore, during the installation and use of liquid hydrogen storage tanks, a full range of precautions must be taken to prevent fire and explosion accidents.
