Heat pipes.

(9) Heat pipes. Heat pipes recover energy, usually in the form of waste heat, from high temperature fluids to heat low temperature fluids. A heat pipe consists in part of sealed heat transfer chambers and a capillary structure. In general, the heat transfer chambers alternatively vaporize and condense a working fluid as it passes from one end of the chamber to the other.

Source

26 CFR § 1.48-9


Scoping language

None
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