Heat Recovery Technologies7 / 13
Thermal Wheels, Pipes & Flash Tanks
Rotating heat wheels, heat pipes, flash steam recovery from condensate.
10 min read · Jacob Willis, Net Zero Lead · Last reviewed July 2026
Not every recovery duty suits a plain heat exchanger. Some need to transfer heat between two air streams compactly, some need to move heat passively with no moving parts, and some need to bridge a gap in time between when heat is available and when it is wanted. This lesson covers three technologies that handle these cases: thermal wheels, heat pipes, and, for steam systems, flash recovery. Each solves a specific matching problem the previous lessons raised.
In this lesson
- 01Thermal wheels
- 02Heat pipes
- 03Flash steam recovery
- 04Sources and further reading