A method is disclosed for increasing heat transfer efficiency between a conduit and a gas flowing through the conduit by fluidizing in the gas stream a Geldart Type A powder having controlled fines content. The invention further provides a method for integrating two fluid beds to transfer heat from a...http://www.google.com/patents/US4914255?utm_source=gb-gplus-sharePatent US4914255 - Heat transfer using fluidized particles
