| 摘要 |
A single-fluid two-phase turbine expander (14) is employed in a compression-expansion refrigeration system. The turbine expander (14) has its rotor mechanically coupled to the drive train of the associated refrigeration compressor (11), which can be a high-speed centrifugal compressor or a geared screw compressor. The turbine (14) is a straight-forward design, with a rotor disk (27) having peripheral vanes (31), and a nozzle block (29) that houses the disk (27) and contains a group of nozzles (30) that are directed at the vanes (31). The nozzles (30) each have an inlet orifice plate (33) and a converging/diverging internal geometry (34) that permits supersonic discharge. The vanes (31) are shaped for impulse reaction and have a sharp exit bend to prevent further flashing of the two-phase mixture in the rotor. |
