MetallicDragon
MetallicDragon t1_j6j73zf wrote
Reply to comment by hawaiianthunder in NASA tested new propulsion tech that could unlock new deep space travel possibilities by Creepy_Toe2680
On the contrary, it makes it much harder. On earth, you can radiate away heat by direct contact with air. No air in space means the only way to dump heat is by black body radiation.
MetallicDragon t1_j648bwu wrote
Reply to comment by PastTense1 in UK scientists discover method to reduce steelmaking’s CO2 emissions by 90% / Decarbonising the steel industry is an imperative by Sorin61
The rest of the sentence which you cut off:
>their technology aims to convert this carbon dioxide into carbon monoxide that can be reused in the iron ore reaction.
Presumably, if they're capturing and reusing a gas, it would need to be contained, and thus isolated from the workers.
Plus, I don't think CO is so deadly that leaks would be immediately dangerous. They could be detected and workers evacuated before any ill effects happen.
MetallicDragon t1_j6j7y4l wrote
Reply to comment by iheartbbq in NASA tested new propulsion tech that could unlock new deep space travel possibilities by Creepy_Toe2680
>Oh, twice huh. H2 weighs 2 grams per mole, it will need to be ejected at nine times the velocity of a water molecule at 18 g/mol to have equal the force.
Or just with 9x the mass flow rate.And thrust doesn't matter too much in space, what matters is fuel efficiency. A weaker nuclear rocker might need to do longer burns, but for the same mass of fuel as a conventional engine, it will get you going a lot further.