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feedwater train arrangement
IV
PatentsALERT
5403569
5402845 RECOVERY PROCESS FOR PUMP SYSTEM
HEAT
Jeffery Harold L; Hickenlooper Harrison T Ft Wayne, IN, UNITED STATES Assigned to Carrier Corporation A process for noting in advance when a change in set point temperature is to occur in one or more zones. A heating stage is prematurely activated and dampers are selectively opened in the one or more zones that are about to experience changes in set point temperature. Activation of a second stage of heating is not permitted unless the zone temperature is lagging the current set point.
PROCESS FOR BOILER FLUE GAS CLEANING BY ABSORPTION, SEPARATION AND LIQUEFACTION Abdelmalek Fawzy UNITED STATES
St Louis, MO, 63146,
Sulfur dioxide in flue gas exhaust stream from fossil fueled boiler, is absorbed by a regenerative organic solvent in a centrifugal gas separator-absorber.
5403153 HOLLOW
COMPOSITE BLADE
TURBINE
Goetze Raymond H Clifton Park, NY, UNITED STATES Assigned to The United States of America as represented by the Secretary of the Air Force The invention provides a woven composite lightweight turbine blade in which, e.g. ceramic or carbon fibers are woven around a foam core in the airfoil section of the blade and around a removable mandrel in the dovetail section of the blade, and braided at the tip and root thereof to define a woven blade pre-form. An infiltrant of e.g. phenolic, carbon or ceramic is added to the woven pre-form, which is then pyrolized to provide a thermally stable matrix in the pre-form and define a composite woven blade therewith. The resulting blade has a cavity in the air foil section between the tip and root sections of the blade and a hollow dovetail section. The dovetail section has reinforcing carbon or ceramic fibers mounted across the resulting passageway through the dovetail, which fibers are cooled by air passing through such dovetail passage such that the dovetail acts as a heat exchanger for the soformed woven composite blade. The so cavitied woven composite blade has the dual advantage of a) being lightweight and b) having the heat exchange passage noted above.
5404724 BOILER FEEDPUMP TURBINE DRIVE/FEEDWATER TRAIN ARRANGEMENT Silvestri George J Winter Park, FL, UNITED STATES Assigned to Westinghouse Electric Corporation An improved cycle arrangement for a steam turbine system in which an auxiliary turbine drives a boiler feedwater pump. The turbine system includes a primary turbine driving an electric power generator. The primary turbine includes a high pressure section and a low pressure section. A boiler supplies steam to drive the primary and auxiliary turbines. A condenser recovers exhaust steam from the LP section and a plurality of feedwater heaters preheats condensate collected at the condenser and pumped back to the boiler. The system extracts steam from the HP turbine section for operating the auxiliary turbine. Extracted steam from the auxiliary turbine is isolated from the primary turbine by coupling the steam to a feedwater heater supplied solely from a corresponding extraction point of the auxiliary turbine. The exhaust steam from the auxiliary turbine is coupled directly to the condenser.
PatentsALERT
5403569
5402845 RECOVERY PROCESS FOR PUMP SYSTEM
HEAT
Jeffery Harold L; Hickenlooper Harrison T Ft Wayne, IN, UNITED STATES Assigned to Carrier Corporation A process for noting in advance when a change in set point temperature is to occur in one or more zones. A heating stage is prematurely activated and dampers are selectively opened in the one or more zones that are about to experience changes in set point temperature. Activation of a second stage of heating is not permitted unless the zone temperature is lagging the current set point.
PROCESS FOR BOILER FLUE GAS CLEANING BY ABSORPTION, SEPARATION AND LIQUEFACTION Abdelmalek Fawzy UNITED STATES
St Louis, MO, 63146,
Sulfur dioxide in flue gas exhaust stream from fossil fueled boiler, is absorbed by a regenerative organic solvent in a centrifugal gas separator-absorber.
5403153 HOLLOW
COMPOSITE BLADE
TURBINE
Goetze Raymond H Clifton Park, NY, UNITED STATES Assigned to The United States of America as represented by the Secretary of the Air Force The invention provides a woven composite lightweight turbine blade in which, e.g. ceramic or carbon fibers are woven around a foam core in the airfoil section of the blade and around a removable mandrel in the dovetail section of the blade, and braided at the tip and root thereof to define a woven blade pre-form. An infiltrant of e.g. phenolic, carbon or ceramic is added to the woven pre-form, which is then pyrolized to provide a thermally stable matrix in the pre-form and define a composite woven blade therewith. The resulting blade has a cavity in the air foil section between the tip and root sections of the blade and a hollow dovetail section. The dovetail section has reinforcing carbon or ceramic fibers mounted across the resulting passageway through the dovetail, which fibers are cooled by air passing through such dovetail passage such that the dovetail acts as a heat exchanger for the soformed woven composite blade. The so cavitied woven composite blade has the dual advantage of a) being lightweight and b) having the heat exchange passage noted above.
5404724 BOILER FEEDPUMP TURBINE DRIVE/FEEDWATER TRAIN ARRANGEMENT Silvestri George J Winter Park, FL, UNITED STATES Assigned to Westinghouse Electric Corporation An improved cycle arrangement for a steam turbine system in which an auxiliary turbine drives a boiler feedwater pump. The turbine system includes a primary turbine driving an electric power generator. The primary turbine includes a high pressure section and a low pressure section. A boiler supplies steam to drive the primary and auxiliary turbines. A condenser recovers exhaust steam from the LP section and a plurality of feedwater heaters preheats condensate collected at the condenser and pumped back to the boiler. The system extracts steam from the HP turbine section for operating the auxiliary turbine. Extracted steam from the auxiliary turbine is isolated from the primary turbine by coupling the steam to a feedwater heater supplied solely from a corresponding extraction point of the auxiliary turbine. The exhaust steam from the auxiliary turbine is coupled directly to the condenser.