Liquid hydrogen (H2(l)) is the liquid state of the element hydrogen. Hydrogen is found naturally in the molecular H 2 form. [4] To exist as a liquid, H 2 must be cooled below its critical point of 33 K. However, for it to be in a fully liquid state at atmospheric pressure, H 2 needs to be cooled to 20.28 K (−252.87 °C; −423.17 °F). [5] .

2022年3月11日 · Construction of the world’s largest liquid hydrogen (LH2) storage tank is almost complete at launch pad 39B at NASA Kennedy Space Center (KSC) in Florida. With a usable capacity of 4732 m3 (1.25 Mgal), this new vessel is roughly 50% larger than its sister tank, which is located 170 m (550 ft) to the southeast.

Largest active LH2 tanks in the world....for now! Pressure rating or Max. Allowable Working Pressure (MAWP) = full vacuum to 6.2 barg (90 psig) or 7.2 bard (105 psid) Traditional storage tank - no control. Heat energy from ambient stores within the liquid, ullage pressure rises, relief valve opens to vent. IRAS tank – full control.

Be familiar with the technologies of LH2 generation, storage, and transport. Identify the risk and hazard of LH2 pertinent to responders. 1 - liquid @ ~20 K; 2 - pressurised gas @ ~300 K; 3 - cryogenic compressed gas. Source: Klier J., et al, A new cryogenic high-pressure H2 test area: First results. Proc 12th IIR Int Conf, Dresden (2012).

NASA’s history with liquid hydrogen (LH2) as a rocket fuel goes all the way back to the infancy of spaceflight and standing-up of the Agency in the late 1950’s.

Liquefied Hydrogen (LH 2) is a key commodity used for a wide range of industrial applications, such as refining hydrocarbon products, steel making, electronics and fertilizer production.

Hydrogen — a light and extremely powerful rocket propellant — has the lowest molecular weight of any known substance and burns with extreme intensity (5,500°F).

2022年11月15日 · Engineers have completed filling the core stage liquid hydrogen tank, and have moved into the replenish phase. Core stage liquid oxygen fast fill is still underway. Although the LH2 tank is larger than the LOX tank, LOX is denser than LH2 and takes longer to load. Teams continue to work toward a two-hour launch window …

Green Liquid Hydrogen (LH2) refers to hydrogen that is produced using renewable energy sources such as solar, wind, and hydropower and does not emit any greenhouse gases during its production or use. The use of LH2 is an important step towards the decarbonization of the energy sector and reducing carbon emissions.

2021年11月1日 · Now, NASA has constructed a new tank capable of holding 1.25 million gallons of LH2 – roughly 50% larger than its 1960s predecessors – to support the agency’s Artemis missions to the Moon and Mars.