BHP says battery electric cheaper than hydrogen as it dumps diesel

Re:BHP says battery electric cheaper than hydrogen as it dum... by c_o_n_v_e_x on Wednesday August 02, 2023 @08:37PM (#36979846)

I replied to your comment that was talking about transportation... i.e. not using it right away.

H2 has a daily boil off 5 times greater than LNG. https://www.sciencedirect.com/science/article/pii/S277265682...

Not only that, liquid H2 has worse energy density than LNG. So again, you're spending more units of energy to comparatively more less units of energy.

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Re:BHP says battery electric cheaper than hydrogen as it dum... by _hypx on Wednesday August 02, 2023 @09:16PM (#36980127)

You can liquefy hydrogen on the spot. You don't need to move LH₂ around. If that does become necessary, the solution is improved insulation. Modern materials can reduce boil-off to that of LNG's. In fact, LNG was once seen as impossible because of its boil-off concerns at one point.

You will need bigger tanks but the fuel is much lighter. It is a solvable problem.

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Re:BHP says battery electric cheaper than hydrogen as it dum... by c_o_n_v_e_x on Thursday August 03, 2023 @08:29PM (#36993915)

>Boiloff is not that big of a deal if you are using the fuel right away.

>You can liquefy hydrogen on the spot. You don't need to move LH₂ around.

Why are you liquefying H2 if you are using it right away and or not transporting it? Liquefaction is to optimize for storage. You're all over the shop.

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Re:BHP says battery electric cheaper than hydrogen as it dum... by _hypx on Thursday August 03, 2023 @09:30PM (#36994330)

You liquefy H₂ for the density advantage, not for storage. You actually want to store hydrogen as a gas since it won't boil off.

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