Invention Grant
- Patent Title: Startup method of Francis turbine and Francis turbine
-
Application No.: US17351364Application Date: 2021-06-18
-
Publication No.: US11608809B2Publication Date: 2023-03-21
- Inventor: Masahiko Nakazono , Takero Mukai , Yoshitaka Arihara
- Applicant: KABUSHIKI KAISHA TOSHIBA , TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATION
- Applicant Address: JP Tokyo; JP Kawasaki
- Assignee: KABUSHIKI KAISHA TOSHIBA,TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATION
- Current Assignee: KABUSHIKI KAISHA TOSHIBA,TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATION
- Current Assignee Address: JP Tokyo; JP Kawasaki
- Agency: Foley & Lardner LLP
- Priority: JPJP2020-106298 20200619
- Main IPC: F03B15/00
- IPC: F03B15/00 ; F03B15/08 ; F03B11/00 ; F03B3/18

Abstract:
A startup method of a Francis turbine according to an embodiment includes: a bypass-valve opening step of opening the bypass valve with the inlet valve closed; an inlet-valve opening step of opening the inlet valve after the bypass-valve opening step; and a first rotation-speed increasing step of increasing a rotation speed of the runner by opening the guide vane at an opening that is 50% or more of a maximum opening before a flow velocity of a swirling flow flowing around the runner reaches 90 m/sec.
Public/Granted literature
- US20210396204A1 STARTUP METHOD OF FRANCIS TURBINE AND FRANCIS TURBINE Public/Granted day:2021-12-23
Information query