HERMETICALLY SEALED TURBO EXPANDER SYSTEM FOR USE IN ORGANIC RANKINE CYCLES AND ORGANIC RANKINE CYCLE PLANT

摘要

Hermetically sealed turbo expander system for use in organic rankine cycles and organic rankine cycle plant The present invention is related to a hermetically sealed turbo expander system (1) for use in organic rankine cycles, comprising a turbo expander (2), a rotatable rotor (3) and a casing (4) which is filled with an organic working medium (5) in a gaseous condition, whereby the turbo expander (2) is arranged around the rotor (3) within the casing (4), at least two bearings (6) for bearing the turbo expander (2) around the rotor (3), with sealed openings (7) in the casing for lines (11, 12) to and from the turbo expander (2), wherein the at least two bearings (6) are liquid lubricated bearings, with at least one sealed supply opening (8) in the casing (4) for guiding one or more supply lines (15) to the at least two bearings (6) and a feedback opening (9) in the casing (4) for guiding a feedback line (16) to the organic rankine cycle. The inventions further relates to an organic rankine cycle plant (30) with such a hermetically sealed turbo expander system (1).