Double fluid power recovery system and process therefor

Abstract From the Canadian patent

A method and apparatus for power recovery from thermal input. A turbine is disclosed as employing two rotors for two gas cycles one using, a high boiling point fluid and the other using a low boiling point fluid such as steam and butane, respectively. Separation of the fluids is accomplished through mutual collection and selective withdrawal from accumulator tanks. Seals are also disclosed which employ both air and the higher boiling point fluid as a means for preventing the contamination of bearing lubricants by the low boiling point fluids.