POWER PLANT

WIPO Patent Application WO/2010/087126

A1

A boiling-water nuclear power plant supplies steam from a nuclear reactor to a high-pressure turbine and a low-pressure turbine.  Water generated by concentrating the steam in a steam condenser is heated by low-pressure and high-pressure feed-water heaters, and is supplied to the nuclear reactor.  The steam discharged from the low-pressure turbine is compressed by a steam compressor (heat pump) before being supplied to and heated in the low-pressure feed-water heater.  The steam extracted from the low-pressure turbine is supplied to the low-pressure feed-water heater.  If the power required for the steam compressor is designated by Q1; the thermal energy supplied from the steam compressor is designated by Q3; the coefficient of performance of the steam compressor is designated by COP (=Q3/Q1); and the thermal efficiency of the boiling-water nuclear power plant is designated by η, the steam compressor is connected to a part of a main steam system and the feed-water heaters so that COP – 1/η > 0 is satisfied.  This power plant can improve the thermal efficiency of the power plant when the output is increased.

HATAMIYA SHIGEO (JP)
NAMBA KOJI (JP)
TAKAHASHI FUMIO (JP)
NISHIDA KOJI (JP)
NAKANO SUSUMU (JP)
SHIBATA TAKANORI (JP)

PCT/JP2010/000248

August 05, 2010

January 19, 2010

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HITACHI LTD (JP)
HATAMIYA SHIGEO (JP)
NAMBA KOJI (JP)
TAKAHASHI FUMIO (JP)
NISHIDA KOJI (JP)
NAKANO SUSUMU (JP)
SHIBATA TAKANORI (JP)

F01K9/00; F01K7/38; F01K7/44; F22D1/32; F25B11/00

JPS5993103A	1984-05-29
JPH01123001U	1989-08-22
JPH0242103A	1990-02-13
JPS57212308A	1982-12-27
JPS54162044A	1979-12-22
JPH01123001A	1989-05-16
JPH0565808A	1993-03-19

POLAIRE I. P. C. (JP)
Polaire Intellectual Property Corporation (JP)

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