師兄讀多少少書先
美股認真討論區 MMMCCVIII
京阪代表取締役
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剛好相反 氫氣能源密度得天然氣嘅三分之一
師兄讀多少少書先
師兄讀多少少書先
星期一龍gel?
氫氣車唔係吹咗好耐啦咩？之前係有乜嘢事冇研發到
？
之前係有乜嘢事冇研發到？
strike 80 唔exercise 唔通lapse 撚左佢？？？？
speaking of 王家衛 我覺得東邪西毒幫左我好多 特別係洪七個心態同歐陽峰自嘲個一部份
氫車日本同澳洲行左好耐
但歐洲佬同美國佬辰行電車所以bam左氫車
但歐洲佬同美國佬辰行電車所以bam左氫車
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.
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.
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.
上面位師兄不用再貼文
依個係basic physic黎 你係咁copy google無用
依個係basic physic黎 你係咁copy google無用
日本同澳洲行咁成為國際standard既機會好微
Only two ways:
1. Liquified hydrogen, which is on9
2. In form of Ammonia , which is on9 again
1. Liquified hydrogen, which is on9
2. In form of Ammonia , which is on9 again
大家唔洗講咁多physics , 有得算咪炒囉。
唔撚是掛
最好唔好掂hydrogen股
依家個Industry supply>demand 只少100倍以上
依家個Industry supply>demand 只少100倍以上
佢哋會唔會無知到唔知香港生活成本？
class
btc 唔係想爆上呀
錢唔想放銀行會放去邊