The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 15, 2014
Filed:
Sep. 13, 2011
Hiroyuki Kawagishi, Yokohama, JP;
Akihiro Onoda, Yokohama, JP;
Tomohiro Tejima, Yokohama, JP;
Tomohiko Tsukuda, Kawasaki, JP;
Asako Inomata, Yokohama, JP;
Naoki Shibukawa, Saitama, JP;
Hiroyuki Kawagishi, Yokohama, JP;
Akihiro Onoda, Yokohama, JP;
Tomohiro Tejima, Yokohama, JP;
Tomohiko Tsukuda, Kawasaki, JP;
Asako Inomata, Yokohama, JP;
Naoki Shibukawa, Saitama, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
In one embodiment, a calculation method of moisture loss in a steam turbine calculates first a wetness fraction at the inlet and outlet of each of stationary blade cascades and rotor blade cascades. Subsequently, the moisture loss is classified into (1) supersaturation loss, (2) condensation loss, (3) acceleration loss, (4) braking loss, (5) capture loss and (6) pumping loss, and a loss for calculation of the moisture loss is selected from the above losses (1) to (6) according to the wetness fraction of steam at the inlet and outlet of each blade cascade. An amount of each selected loss is calculated, and an amount of moisture loss at each blade cascade is calculated.