Power plants – Motive fluid energized by externally applied heat – Process of power production or system operation
Reexamination Certificate
2000-03-20
2001-05-15
Nguyen, Hoang (Department: 3748)
Power plants
Motive fluid energized by externally applied heat
Process of power production or system operation
C060S670000
Reexamination Certificate
active
06230493
ABSTRACT:
BACKGROUND OF THE INVENTION
FIELD OF THE INVENTION
The invention lies in the field of power generation. The invention relates to a steam power station.
German Published, Non-Prosecuted Patent Application DE 196 42 100 A1, discloses a steam power station. In the publication, the condenser is disposed laterally next to the turbine on the turbine foundation and, therefore, is obviously located inside the power house even though it is not shown in the publication. Locating the condenser inside the power house requires that the power house be widened by several meters, which leads to a corresponding increase in the span and installation height of the power house crane. To reduce cost, the widening is made as small as possible, thus restricting the optimization of the construction of the condenser neck, such optimization helps increase the efficiency of the power plant. When turbine and condenser are disposed on the same foundation, a return flow of the condensate to low-pressure turbines is not ensured and a greater delivery head of the main cooling-water pumps is to be expected. Furthermore, the condensate receiver of the condenser can only be used directly by a special construction for draining the components in the vacuum state. According to the above mentioned publication, the center line of the condenser is disposed above the turbine center line. As such, an unfavorable flow behavior and a higher pressure loss are produced by the exhaust-steam deflection. An additional draining device for the low-pressure turbine casing is necessary, which entails an increase in the overall height of the top part of the low-pressure turbine casing and, thus, a corresponding increase in height of the power house.
SUMMARY OF THE INVENTION
It is accordingly an object of the invention to provide a steam power station that overcomes the hereinafore-mentioned disadvantages of the heretofore-known devices of this general type and that reduces the height and width of the power house and also causes no restriction in the configuration of the condenser neck.
With the foregoing and other objects in view, there is provided, in accordance with the invention, a steam power station including a power house, an annex, a turbogroup disposed in the power house, and a condenser having a condenser neck connected to the turbogroup, and main cooling-water lines including at least one inlet and at least one outlet, the condenser disposed lateral to the turbogroup, and the condenser, the inlet and the outlet disposed in the annex.
The configuration permits a reduction in the overall volume of the power house. The length of the condenser neck, due to the fact that it is disposed in a freely extendable annex, can be freely selected regardless of the height and width of the power house. Thus, an optimum condenser diffuser configuration for improving the efficiency of the steam power station is ensured. A uniform inflow zone is ensured over the entire outflow cross section of the condenser neck. The configuration ensures optimum determination of the diffuser angle &agr;, which influences the flow behavior in the condenser neck. In an optimally configured condenser neck, the steam flow is decelerated to a lower velocity with minimum losses with simultaneous pressure recovery.
In accordance with another feature of the invention, the turbogroup has a turbine center line, the condenser has a center line located below the turbine center line, and the condenser neck has a gradient towards the condenser.
In accordance with a concomitant feature of the invention, the gradient is predetermined.
In order to avoid condensate runback from the condenser to the turbine and unfavorable flow behavior due to exhaust-steam deflection, the condenser neck has a predeterminable gradient in the direction of the condenser, with the center line of the condenser being located below the turbine center line.
Other features that are considered as characteristic for the invention are set forth in the appended claims.
Although the invention is illustrated and described herein as embodied in a steam power station, it is nevertheless not intended to be limited to the details shown because various modifications and structural changes may be made therein without departing from the spirit of the invention and within the scope and range of equivalents of the claims.
REFERENCES:
patent: 3939356 (1976-02-01), Loane
patent: 3953971 (1976-05-01), Parker
patent: 4038821 (1977-08-01), Black
patent: 4464080 (1984-08-01), Gorlov
patent: 196 40 100 A1 (1998-04-01), None
Hauser Ulrich
Zhang Pengcheng
ABB Patent GmbH
Greenberg Laurence A.
Lerner Herbert L.
Nguyen Hoang
Stemer Werner H.
LandOfFree
Steam power station does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Steam power station, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Steam power station will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2556461