Quote:
Originally Posted by Christ
Turbochargers are /pressure/ engines, not heat engines. If the water evaporates while crossing the face of the turbine, the steam expansion rate creates a higher pressure differential across its face, thus increasing the power by which it can be driven. The heat is completely circumstantial to this process.
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The turbocharger, like all turbines, are mass flow engines. Heat and pressure do work to move a mass of working fluid through the turbine producing power. Think of the turbines in a hydroelectric dam.