The future of liquid hydrogen

Liquéfaction de l’hydrogène

Figure 2 - Cold purification of the Kourou hydrogen liquefier (Air Liquide document)

Figure 3 - Insulation work on equipment contained in a &#34;vacuum&#34; cold box (Air Liquide document)

Figure 4 - Ortho-hydrogen and para-hydrogen

Figure 5 - Equilibrium between ortho-hydrogen and para-hydrogen as a function of temperature (Curve taken from NBS Monograph 168)

Figure 6 - Enthalpy of conversion of normal-hydrogen to para-hydrogen at all pressures (Curve taken from NBS Monograph 168)

Figure 7 - Temperature diagram – entropy of n-hydrogen in the range 180 to 300 K (Curve taken from NBS Monograph 168)

Figure 8 - Temperature diagram – entropy of n-hydrogen in the range 90 to 220 K (Curve taken from NBS Monograph 168)

Figure 9 - Temperature diagram – entropy of n-hydrogen in the range 0 to 100 K (Curve taken from NBS Monograph 168)

Figure 10 - Helium refrigeration cycle

Figure 11 - Gas-bearing expansion turbine (Air Liquide document)

Figure 12 - Hydrogen refrigeration cycle

Figure 13 - Europe&#039;s largest hydrogen liquefier, at Waziers in northern France (Document Air liquide)

Figure 14 - Simplified diagram of the Kourou plant

Figure 15 - General view of the Kourou plant. Methanol reforming unit (Air Liquide document)

Figure 16 - General view of the Kourou plant. Compressors and cold box (Air Liquide document)

Figure 17 - Model of the EQHHPP project