There already is compressed air which is used by the scuba helmet. Please do a bit of research before suggesting.
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- Be pumped into engines to cool them at high efficiency
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- Solidify Oil and Fuel
- Be safely stored in Tanks
- Be removed from tanks with Buckets
What the hell are engines and tanks? Are you talking about buildcraft? This is not buildcraft.
You want to transport LIQUID NITROGEN in an OPEN bucket?
Perhaps run a Coolant Cell through an extractor again.
Again? Coolant cells aren't created by extracting water cells anymore.
The luminator is being reworked!
See above, Scuba Helmet is already implemented.
Rapidly cool a machine that is overheaing.
Overheating machines? Do you mean overheating reactors? Are you sure it's a good idea to cool down a nuclear reactor that fast and to heat up liquid nitrogen that fast? You know, structural integrity and expanding when heating. This could lead to some explosions.
All in all, I like your ideas, except from the parts I quoted. However, if I remember correctly Alblaka said something about not adding liquids. Also, the Distiller would require more uses before being implemented.