同期の暴櫻
2023-4-8 15:23:43
On a BTU/lb basis, Hydrogen has about 2.5 times the energy density of methane. So, if you burn one pound of hydrogen vs one pound of natural gas, you will get 2.5 times the energy.
同期の暴櫻
2023-4-8 15:24:52
:^(
同期の暴櫻
2023-4-8 15:26:00
:^(
人總要勇敢生存
2023-4-8 15:26:01
Nope. We have to consider the volumetric energy density.
Volumetric energy density
LNG has a volumetric energy density advantage compared to new fuels. Liquid hydrogen, ammonia and methanol have 34 percent, 51 percent and 63 percent of the volumetric energy density of LNG (respectively). In other words, it takes about two cubic meters of ammonia to match the energy output of one cubic meter of LNG. To achieve the same sailing distance, fuel tanks for liquid hydrogen would need to be at least three times the volume of those for LNG as a consequence of the large amounts of insulation required. For ammonia, the tank size ratio is approximately two to one compared with LNG and in the case of methanol, tank sizes are equivalent. The potential difference in sailing distance would not be clear if the fuels were simply compared on a per-tonne basis.
師兄讀多少少書先