Boiloff

[Interstellar-farmer]

Hi, I was wondering if there is any mod that reduces/eliminates boiloff (ie boiloff on LH2 or fusion pellets), if there is could you link it?

[jimmymcgoochie]

You’re going to need to narrow it down a bit, there are several different mods that add liquid hydrogen in some form and they use very different systems to prevent boil off:

• Cryo Tanks used active cooling, expending electric charge to prevent fuel boil off for both hydrogen and methane, and is a requirement for several of Nertea’s other mods e.g. Kerbal Atomics and Cryo Engines. If you’re going for a fairly stock-like set of mods, this is probably the one you want as it’s the simplest to use and even adds the same cooling abilities to stock fuel tanks and those from some other mods too, however that electric cost starts stacking up with larger tanks and when you’re far from the Sun you’ll need nuclear reactors to cool all those tanks, or you can switch the cooling off and watch your fuel slowly disappear... 
• Realism Overhaul and the various mods that power it use a different, and realistic, approach- you can add insulation to your tanks which reduces (but never totally prevents) cryogenic fuels (hydrogen, methane, fluorine, oxygen and so on) from boiling off, but the downside is that these add mass and if you expose them to air heating during launch they will catch fire and explode. Every time. Radiators might help keep the fuel cool but in RO but they’re also heavy and much less effective than in stock.
• If you’re using something different e.g. KSPIE then that could well have its own way of dealing with this issue; I’m not familiar with that so can’t really comment on that.