I don't need the high temperature, only trying to recover as much heat as feasible. My oil transfer fluid loop only reaches 525F. My concern is that I want to leave the heat exchanger in the exhaust stream (take very large dampers to reroute gas stream) and when the heat is not needed the oil...
I have a heat recovery application taking heat out of the exhaust of a turbine (930F) and using the heat in a Rankin cycle to generate power. I need a heat transfer media that can handle the high temperatures in the exhaust stream. My loop between the exhaust heat exchanger and the Rankin...