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:
Jan. 19, 2010
Shigeo Hatamiya, Hitachi, JP;
Koji Namba, Mito, JP;
Fumio Takahashi, Hitachi, JP;
Koji Nishida, Hitachiota, JP;
Susumu Nakano, Hitachi, JP;
Takanori Shibata, Hitachinaka, JP;
Shigeo Hatamiya, Hitachi, JP;
Koji Namba, Mito, JP;
Fumio Takahashi, Hitachi, JP;
Koji Nishida, Hitachiota, JP;
Susumu Nakano, Hitachi, JP;
Takanori Shibata, Hitachinaka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A boiling water nuclear power plant supplies steam from a reactor to high-pressure and low-pressure turbines. Feed water generated by condensing steam in a condenser is heated by low-pressure and high-pressure feed water heaters and supplied to the reactor. The steam discharged from the low-pressure turbine is compressed by a steam compressor and supplied to one of the low-pressure feed water heaters to heat feed water. The steam extracted from the low-pressure turbine is supplied to the low-pressure feed water heater. When power required for the steam compressor is Q, heat energy supplied from the steam compressor is Q, a coefficient of performance of the steam compressor is COP (=Q/Q), and a thermal efficiency of the boiling water nuclear power plant is η, the steam compression apparatus is connected to a position in a main steam system and to the feed water heater so as to satisfy COP−1/η>0.