Fig. 7. — Temperature-Entropy diagram for 500 lb. (abs.). Right-hand portion enlarged to show effect
of more than one interheat

There is nothing to prevent such steam being fed into any type of engine arranged for interheating, provided
the heat is brought to the turbine instead of the steam from the engine being taken back to the boilers. Under
this arrangement it would not be necessary to modify the boiler plant at all, but it would mean the addition
of a producer gas plant to the power station which is a very likely development in the future. Moreover,
it would not be very difficult to modify'' many existing turbines to take interheated steam so that the scheme might be worth going into from a practical point of 68 calories and a specific heat of 0-033.
http://archive.org/stream/proceedings58inst/proceedings58ins...


The steam turbine being provided with a high temperature and high pressure turbine portion, a medium pressure portion into which interheated steam from the high pressure portion is introduced with a high temperature and a medium pressure,
/patents/EP0849434A2?cl=en

inter-heated steam
http://www.doosan.com/skodapower/cz/documents/service/Kakanj...