wvlad Posted June 30, 2019 Share Posted June 30, 2019 You can convert 1000 g of water to 1650-3333 g of oil. But the same 1000 g of water gives only 112 g of hydrogen. Hydrogen fuel efficiency is about 1.5-3 times better but still it takes like 14 times more water and you also need to cool hydrogen. It's 8000+ Kg (yes, 8000000 g) of water per rocket launch! So guys what do you think about using hydrogen fuel and where do you get so much water? Link to comment https://forums.kleientertainment.com/forums/topic/108175-producing-hydrogen-for-fuel-uses-water-very-inefficiently/ Share on other sites More sharing options...
Time-Green Posted June 30, 2019 Share Posted June 30, 2019 It's just a nice bonus from the electrolyzer. You can't rely on it but it's a pretty nice return Link to comment https://forums.kleientertainment.com/forums/topic/108175-producing-hydrogen-for-fuel-uses-water-very-inefficiently/#findComment-1216768 Share on other sites More sharing options...
metallichydra Posted June 30, 2019 Share Posted June 30, 2019 perhaps they have like 5 hydrogen vents? i just searched on tools not included (the seed browser), and found a world with 5 hydrogen vents the average output is still only a little more than 110 g/s, so they cant be used. (hydrogen vents needs a buff. like, 5 produces as much as a single electrolyzer!) Link to comment https://forums.kleientertainment.com/forums/topic/108175-producing-hydrogen-for-fuel-uses-water-very-inefficiently/#findComment-1216769 Share on other sites More sharing options...
Yunru Posted June 30, 2019 Share Posted June 30, 2019 42 minutes ago, Time-Green said: It's just a nice bonus from the electrolyzer. You can't rely on it but it's a pretty nice return But that means you're wasting water on an electrolyzer for oxygen! Link to comment https://forums.kleientertainment.com/forums/topic/108175-producing-hydrogen-for-fuel-uses-water-very-inefficiently/#findComment-1216777 Share on other sites More sharing options...
bobucles Posted June 30, 2019 Share Posted June 30, 2019 Stick to petroleum rockets for most of your space exploration. It's more efficient even in terms of trading water for fuel at an oil well. Hydrogen rockets are indeed very expensive, but remember that rockets take many cycles per journey and the overall g/s cost of them isn't terribly high. Link to comment https://forums.kleientertainment.com/forums/topic/108175-producing-hydrogen-for-fuel-uses-water-very-inefficiently/#findComment-1216779 Share on other sites More sharing options...
Stoned Posted June 30, 2019 Share Posted June 30, 2019 Catch the steam of the hydrogen rocket and cool it down. That way you can even gain a lot of water with every start, depending on destination. With petroleum rockets you only get hot CO2, pretty worthless in that amount. And you will need oxygen for your dupes anyways, why not use the hydrogen from electrolyzers. Link to comment https://forums.kleientertainment.com/forums/topic/108175-producing-hydrogen-for-fuel-uses-water-very-inefficiently/#findComment-1216826 Share on other sites More sharing options...
Xuhybrid Posted June 30, 2019 Share Posted June 30, 2019 Getting liquid oxygen is probably more than sufficient for anywhere you NEED to go. Using liquid hydrogen is something you do for the challenge or to fully explore everywhere. Link to comment https://forums.kleientertainment.com/forums/topic/108175-producing-hydrogen-for-fuel-uses-water-very-inefficiently/#findComment-1216838 Share on other sites More sharing options...
blash365 Posted June 30, 2019 Share Posted June 30, 2019 If you condense the steam that is being exhausted from the hydrogen engine, you end up with more water than you used to fill it with hydrogen. Depending on the size of your launch silo ofc. If you produce oxygen from polluted oxygen (e.g. off-gassing rot), you dont need to spend water to supply your dupes. Every dupe produces more water than he consumes by using the toilet. And finally you can gain water from boiling oil to NG and making power out of it. (and then using part of that water to get new oil from wells). If you improve your colony, you shouldnt have any water problems anymore. Link to comment https://forums.kleientertainment.com/forums/topic/108175-producing-hydrogen-for-fuel-uses-water-very-inefficiently/#findComment-1216843 Share on other sites More sharing options...
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