Title:
STEAM TURBINE GENERATING DEVICE
Document Type and Number:
Japanese Patent JPS63195303
Kind Code:
A
Abstract:
PURPOSE:To obtain a steam turbine generating device enabling generating facilities to improve thermal efficiency during low load operation by directly coupling an auxiliary low pressure turbine through a clutch to a main shaft side directly coupled with a high pressure turbine, an intermediate pressure turbine, a main low pressure turbine and a generator. CONSTITUTION:During the normal operation of a steam turbine, a clutch 6 engages mutually to couple an auxiliary low pressure turbine 7 to a generator 5. A closing valve 10 therefore opens to supply steam to steam turbines on a main shaft side and auxiliary shaft one, and then the steam turbines drive the generator 5 to generate electric power. When an exhaust loss level, namely shell pressure at a turbine first stage, becomes lower than its fixed value to issue a low load operation command, the closing valve 10 is closed to disengage the clutch 6, stopping the auxiliary low pressure turbine 7. Consequently, the full closing of the closing valve 10 causes the whole steam to advance into a main low pressure turbine 4, and steam flow quantity through the turbine 4 becomes, twofold in comparison with its usual quantity, resulting in sharp reduction in exhaust loss and effective improvement of thermal efficiency.
Inventors:
ODA AKIRA
Application Number:
JP2622187A
Publication Date:
August 12, 1988
Filing Date:
February 09, 1987
Export Citation:
Assignee:
TOSHIBA CORP
International Classes:
F01K7/22; F01D15/10; F01K7/24; (IPC1-7): F01D15/10; F01K7/22; F01K7/24
Attorney, Agent or Firm:
Noriyuki Noriyuki