Power plants – Pressure fluid source and motor – Pulsator
Patent
1999-11-01
2000-10-10
Wayner, William
Power plants
Pressure fluid source and motor
Pulsator
60661, 417 68, B60T 1320, F04C 1900
Patent
active
061289019
ABSTRACT:
A system for improving the efficiency of a modem power plant for generating electricity with a water-cooled shell and tube steam condenser with an air removal system is disclosed. An air removal system typically includes an air offtake pipe and a two-stage liquid ring vacuum pump. The operating pressure of this type of air removal system under steady state operation attains equilibrium by itself and cannot be changed. This invention adds a pressure control system to lower the operating pressure at the inlet of the vacuum pump of the air removal system so that an optimum minimum pressure is attained to reduce air inventory inside the condenser. This enhances heat transfer and improves power plant efficiency. The pressure control system contains a pressure control device (e.g. miniature condenser), a chiller, and a pump with variable speed. These components are connected in a loop that circulates cold water. Part of the steam in the steam-air mixture from the condenser is condensed while passing through the pressure control device. The pressure control system adjusts the condensation rate in the pressure control device to yield the optimum minimum pressure. The condensation rate is changed by adjusting either the flow rate or the temperature of water leaving the chiller and flowing to the pressure control device, or by adjusting both.
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Kier Philip H.
Wayner William
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