Re:The fanless spinning heatsink: more efficient, and immune...
by acqq on Wednesday July 13, 2011 @02:34AM
(#2758059)
Also suspicious (for me) is:
(page 18 of PDF) "The prototype device is configured as a static (externally pressurized) thrust bearing. In realworld thermal management applications such an externally pressurized air bearing would be replaced by a hydrodynamic (self-pressurizing) air bearing, which uses a minute fraction of the mechanical power supplied by the brushless motor to generate the required lifting force."
So the external pump at the moment keeps the big rotor above the surface? They haven't demonstrated how the setup would otherwise work, but maybe for "self-pressurizing" variant the RPM would have to be really high, which would again mean not quiet at all?
(page 18 of PDF) "The prototype device is configured as a static (externally pressurized) thrust bearing. In realworld thermal management applications such an externally pressurized air bearing would be replaced by a hydrodynamic (self-pressurizing) air bearing, which uses a minute fraction of the mechanical power supplied by the brushless motor to generate the required lifting force."
So the external pump at the moment keeps the big rotor above the surface? They haven't demonstrated how the setup would otherwise work, but maybe for "self-pressurizing" variant the RPM would have to be really high, which would again mean not quiet at all?