| 摘要 |
A power recovery system using the Rankine power cycle incorporating a two-phase liquid-vapor expander with an electric generator which further consists of a heat sink, a heat source, a working fluid to transport heat and pressure energy, a feed pump and a two-phase liquid-vapor expander for the working fluid mounted together with an electric generator on one rotating shaft, a first heat exchanger to transport heat from the working fluid to the heat sink, a second heat exchanger to transport heat from the heat source to the working fluid. |
| 主权项 |
1. A power recovery system for recovery of part of the required energy input during regasification of LNG using a Rankine power cycle, the power recovery system comprising:
a working fluid; a system containing the working fluid in a closed loop; a pump two-phase liquid-vapor expander generator comprising:
a stationary outer housing portion having one lower inlet, one side inlet, a plurality of side outlets, the lower inlet letting in the liquid-phase working fluid, and the side outlet located at an upper end of the outer housing, letting out expanded two-phase working fluid;an inner feed pump on top of the lower inlet, mounted on a rotating center shaft extending most of the length of the pump two-phase liquid-vapor expander generator, the pump pressurizing the liquid-phase working fluid entering from the lower inlet;an inner induction generator further having a casing, mounted on said rotating center shaft, on top of the pump, the induction generator driven by the rotating center shaft, generating electricity as a result, the pressurized liquid-phase incoming working fluid passing through the casing of the induction generator and flowing out through the side outlet for heating;an inner two-phase hydraulic assembly mounted on said rotating center shaft on top of the induction generator for expanding the heated and pressurized two-phase incoming working fluid from the side inlet, converting angular momentum and internal energy of the heated and pressurized two-phase incoming working fluid into torque, driving the rotating center shaft;a casing containing the entire two-phase hydraulic assembly;a stationery flat circular nozzle ring portion at the bottom of the two-phase hydraulic assembly, the nozzle ring portion further having a center aperture and a plurality of converging nozzles on its rim for generation of high velocity vortex flow of the pressurized and heated two-phase working fluid as it flows through; anda rotating turbine runner portion sitting on top of the aperture of the nozzle ring portion and mounted on and driving the rotating center shaft as the turbine runner portion converting angular momentum of the high velocity vortex flow of the two-phase working fluid into torque; a heat source connected to the pump two-phase liquid-vapor expander generator via the pipe system, the heat source heating the pressurized working fluid into higher vapor content, the heated and pressurized two-phase working fluid then re-entering the pump two-phase liquid-vapor expander generator at the two-phase liquid-vapor expander wherein the heated and pressurized two-phase working fluid expands and drives the rotating center shaft, and subsequently the induction generator, the expanded two-phase working fluid flowing out of the pump two-phase liquid-vapor expander for cooling and condensation; and a heat sink connected to the pump two-phase liquid-vapor expander generator via the pipe system, the heat sink cooling the expanded two-phase working fluid such that the two-phase working fluid is condensed back to the liquid state, the liquid-phase working fluid then re-entering the pump two-phase liquid-vapor expander generator at the feed pump, and repeating the cycle. |
