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:
May. 19, 2015
Filed:
Jan. 04, 2012
Shunsuke Mizumi, Hitachinaka, JP;
Koji Ogata, Mito, JP;
Takeshi Kudo, Hitachinaka, JP;
Noriyo Nishijima, Abiko, JP;
Yoshiaki Onda, Mito, JP;
Shunsuke Mizumi, Hitachinaka, JP;
Koji Ogata, Mito, JP;
Takeshi Kudo, Hitachinaka, JP;
Noriyo Nishijima, Abiko, JP;
Yoshiaki Onda, Mito, JP;
Mitsubishi Hitachi Power Systems, Ltd., Kanagawa, JP;
Abstract
An exhaust system for a steam turbine provided with an improved annular flow guide in a high or intermediate turbine. The improved flow guide reduces flow turbulence in an exhaust hood and reduces pressure loss to thereby improve turbine plant efficiency. The shape (vertically symmetric) of a flow guideA according to a conventional technology was modified into the shape (vertically asymmetric) of a flow guidesuch that the length of a downstream flow guide portionis greater than that of a upstream flow guide portion. Numerical analyses were performed to find the optimum flow guide occupation ratio of the conventional technology and the corresponding total pressure loss coefficient. The obtained values were used as reference values. Further, the flow guide occupation ratio of the upstream flow guide portionwas set at 0.4 and the flow guide occupation ratio of the downstream flow guide portionwas set at 0.7; at values where the total pressure loss coefficient becomes lower than the reference value. The rectification effect of the flow guide can thus be enhanced.