NOVELTY - The system has a heat source i.e. cold sea water or steam source, connected to a pump two-phase liquid-vapor expander generator (300) via a pipe system and heating pressurized working fluid i.e. liquefied natural gas, into higher vapor content, where the heated and pressurized fluid is expanded and drives a rotating center shaft (310) and an induction generator. A heat sink is connected to the generator via the pipe system, and cools the working fluid condensed back to a liquid state. The working fluid re-enters the generator at a feed pump, and repeats a rankine power cycle.    USE - Two-phase expansion type power recovery system for facilitating recovery of part of a required energy input during regasification of two-phase working fluid i.e. liquefied natural gas (claimed), using a rankine power cycle in an liquefied natural gas regasification plant e.g. solar thermal power plant, biomass power plant, coal and nuclear power plant.    ADVANTAGE - The system provides efficient and economical power recovery for the regasification plants. The system allows expander work output to be larger than the pump work input and the difference in work to be converted by the generator into electrical energy as power recovery. The system allows losses of a separate pump motor to be eliminated. The system allows small leakages of the working fluid to be within a closed loop and to occur between pump and expander. The system allows leakages of the working fluid to be minimized due to equal pressure on sides of the seal. The system allows an axial thrust to be minimized due to opposing directions of the thrust forces decreasing the bearing friction and increasing bearing life. The generator can tolerate working fluid having high vapor content so as to enable kinetic energy of the high pressure two-phase working fluid to dissipate at an end and top portion in the two-phase hydraulic assembly, thus minimizing physical harm and corrosion to the system.    DETAILED DESCRIPTION - The heat sink is pressurized liquefied natural gas. The feed pump is a cryogenic centrifugal pump. An INDEPENDENT CLAIM is also included for a method for facilitating power recovery using a two-phase fluid Rankine power cycle in an liquefied natural gas regasification plant.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of a two-phase expander generator.    Pump two-phase liquid-vapor expander generator (300)    Rotating center shaft (310)    Non-rotating nozzle ring (402)    Jet exducer (404)    Rotating reaction turbine runner (406)