Power plants – Motive fluid energized by externally applied heat – Heating motive fluid by nuclear energy
Patent
1979-12-05
1982-06-22
Cangialosa, Sal
Power plants
Motive fluid energized by externally applied heat
Heating motive fluid by nuclear energy
376317, G21C 700
Patent
active
043361056
ABSTRACT:
Apparatus utilizing steam from first, second and third extraction points of a steam turbine in a nuclear power plant steam system as heating steam in at least two feedwater heater units for maintaining the final feedwater temperature above a predetermined temperature value is disclosed. More specifically, when the plant loading is determined above a predetermined first level, the apparatus provides heating steam from the first extraction point to a final feedwater heater unit in the feedwater return path of the steam system and also provides heating steam, which is at a lower pressure than that from the first extraction point, from the second extraction point to another feedwater heater unit which preheats the feedwater prior to entering the final feedwater heater unit. At times, when the plant loading falls below the first level, heating steam, which is at a higher pressure than that of the first extraction point, is provided to the final feedwater unit from the third extraction point and a portion of the steam from the first extraction point is redirected as heating steam for the another feedwater heater unit. Moreover, at times, when the plant loading falls below a second predetermined level, which is lower than the first level, the heating steam from the third extraction point provided to the final feedwater heater unit is increased in pressure preferably by an ejector or jet pump device utilizing motive steam from a high pressure source, and in addition, a portion of the steam from the third extraction point is redirected to the another feedwater heater unit.
REFERENCES:
patent: 3575807 (1971-04-01), Ripley
patent: 4000037 (1976-12-01), Nusbaum et al.
patent: 4050418 (1977-09-01), Watanabe
patent: 4061533 (1977-12-01), Durrant
patent: 4104117 (1978-08-01), Parziale et al.
Cangialosa Sal
Westinghouse Electric Corp.
Zitelli W. E.
LandOfFree
Nuclear power plant steam system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Nuclear power plant steam system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nuclear power plant steam system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-651703