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7357092 |
Floating combined cycle power plant
A floating combined cycle power plant includes a plurality of watertight bulkheads placed in a hull, having a structure suitable for being moved at sea, to the height of the freeboard deck; a power...
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7159400 |
Rankine cycle apparatus
When a flow of a working medium stagnates in an expander or evaporator of a Rankine cycle apparatus including a closed working medium circulation circuit, a high pressure exceeding an allowable...
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7059132 |
Steam generator feedwater control system for power plant
In the control of feedwater to the steam generator in a power plant comprising one steam generator and a plurality of turbine plants, the water level in the steam generator and the flow rate...
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5771846 |
Method for feed water control in waste heat steam generators
In a method for feed water control in waste heat steam generators, in particular drum boilers with a circulating pump (9) and drum boilers with natural circulation employed in combination power...
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5548957 |
Recovery of power from low level heat sources
A system based on a refrigeration cycle for converting low grade heat into useful work. A plurality of pressure vessels are interconnected with a common high pressure feed manifold and a common low...
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5410883 |
Control system for plant
In a plant for which process control is made, a margin of an operation allowable limit for a process variable is variably established according to situations for each apparatus constituting the...
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5237816 |
Steam generator control systems
Control systems (or controllers) for once through, unfired steam generators (or boilers) which control a single parameter--the feedwater flow to the boiler--in accord with an energy or enthalpy...
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4884408 |
Method of controlling a combustion process yielding water vapor
The production of water vapor is controlled in a plant for combusting fine-grained and dustlike solid fuels together with air in a combustion zone of a heat exchanger in the upper region of the...
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4870823 |
Low load operation of steam turbines
In the operation of a turbine system composed of apparatus (6,12,14,16) for generating steam and a turbine first stage (4) having inlet nozzles connected to be supplied with steam from the steam...
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4825654 |
Steam plant and method of controlling same
The steam plant is operated so that the temperature of the steam entering the water separator is compared with the saturation temperature of the steam in the separator in order to produce a...
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4713209 |
Drain recovery system for condensate feedwater system of nuclear power plant
A drain recovery system for the condensate feedwater system of a nuclear power plant having condensate pumps for boosting the condensate from a condenser, and feedwater heaters for heating the...
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4685072 |
Steam generator on-line efficiency monitor
A system for the automatic and continuous determination of the efficiency of a fossil fuel-fired vapor generator for utilization by an automatic load control (88) to control the distribution of the...
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4653276 |
Automatic control system for thermal power plant
An automatic control system for a thermal power plant comprises a master controller controlling a turbine in response to an externally applied load command signal, and producing a boiler input...
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4601173 |
Heat transfer method and apparatus
A boiler for a heat sensitive working fluid in which there are three systems, first, a stream of hot combustion gas system, second, a heat transfer fluid system and lastly, a heat sensitive working...
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4576007 |
Method and apparatus for controlling an operation of plant
An apparatus for controlling an operation of a turbine plant on a reduction of the load on a turbine operates to compute a saturation pressure corresponding to the temperature in the downcomer pipe...
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4573323 |
Steam generating apparatus and methods
Steam generating apparatus and methods wherein a liquid is recirculated within a boiler by use of a constant speed dynamic feed water pump acting both to feed the boiler and to effect recirculating...
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4437313 |
HRSG Damper control
A method of and apparatus for controlling a steam turbine system for a combined cycle power plant using measured parameters to control the position of dampers regulating heat flow to steam...
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4384457 |
Hot gas engine convertor
A convertor for a hot gas engine whereby such an engine may be more economically operated. The invention comprises an improvement to a standard hot gas engine including at least one combustion...
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4368773 |
Boiler feed pump turbine control system
A boiler feed pump turbine system wherein the feed pump turbine speed is controlled by a signal locally generated by an operator up to a certain minimum speed and thereafter by a signal...
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4319320 |
System and method for adaptive control of process
A system and method for the adaptive control of a process in which a feed forward control signal corresponding to a process demand is calculated according to a predetermined algebraic function,...
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4287430 |
Coordinated control system for an electric power plant
The operation of an electric power plant is controlled by generating a control signal in response to the pressure at the throttle valves, the load demand signal and the megawatt output of the power...
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4283914 |
Solar energy system
Solar collectors are supported for accurate alignment with the sun through all daylight hours, as guided by a tracking system employing a sensor for light level and subordinate sensors for two axis...
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4275447 |
Method of regulation of the water level in boilers or steam generators
Method of regulation of the water level in boilers or steam generators, in which the inlet flow of feedwater is regulated in response to a deviation signal proportional to the difference between...
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4068475 |
Flow control for once-through boiler having integral separators
A once-through boiler is provided with integral separators with which drain valves are associated. Boiler inlet and outlet flows are balanced throughout startup first by drain valve control in...
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4049971 |
Output regulator for a thermal power-producing plant
The regulator having a P-member and an I-member uses a timing means to delay the desired value signal prior to subtraction of the delayed signal from the received actual value signal. The resultant...
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4020637 |
Vehicle steam engine using on-off valves for controlling steam temperature and pressure
In a vehicle steam engine having a steam generating unit, a condenser, fluid pumps for supplying the condensed liquid and fuel to the steam generating unit, a plurality of bypass passages are...
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3942327 |
Control system for external combustion engine
An external combustion engine, such as the vapor cycle engine, produces power by the expansion of a working fluid vapor. A vapor generator vaporizes a suitable working fluid which is fed to an...
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3922859 |
Control system for a power producing unit
A control system for a power producing unit arranged for cycling operation including means for the rapid loading and unloading of the unit and on-line variable pressure operation throughout a...
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3906731 |
Control system for vapor engines
The control system hereof is for external combustion vapor engines. The vapor is superheated, and by the control system is maintained at substantially predetermined pressure and temperature for the...
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3894396 |
Control system for a power producing unit
A control system for a power producing unit comprising a separate control loop for each controlled variable all operated in parallel in accordance with power demand and wherein the operation of...
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3826093 |
REHEAT VAPOR GENERATOR
This invention relates to a method for increasing the super-heated output flow of a reheat type vapor generator by apportioning additional saturated vapor flow between the superheater and...
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3818699 |
FEED AND INJECTION WATER CONTROL FOR STEAM GENERATORS
A steam generator control system including a once through steam generator, a superheater thermostat sensing the temperature of superheater steam in the generator and controlling a fluid injection...
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3802189 |
BOILER-TURBINE CONTROL SYSTEM
A system for providing a demand signal to control the boiler inputs in a boiler-turbine combination operating in a sliding pressure mode with the throttle valve being controlled to maintain the...
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3788068 |
STEAM POWER PLANT, ESPECIALLY WITH A BOILING WATER NUCLEAR REACTOR
Steam power plant includes a feedwater flow path, feed-water receptacle means located in the flow path, and feedwater degassing means also located in the flow path in the vicinity of the feedwater...
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3777485 |
VAPORIZED FLUID POWERED ENGINE
An apparatus and method for converting heat energy to mechanical energy in a closed circuit power unit by alternately expanding and vaporizing and then condensing a working fluid to product a...
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3769795 |
MULTIPRESSURE STEAM SYSTEM FOR UNFIRED COMBINED CYCLE POWERPLANT
An exhaust heat recovery steam generator is utilized exclusively to develop shaft power to drive a load and includes a high pressure evaporator, low pressure evaporator and deaerator evaporator...
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3756023 |
HEAT RECOVERY STEAM GENERATOR EMPLOYING MEANS FOR PREVENTING ECONOMIZER STEAMING
A system for preventing the formation of steam in an economizer coil disposed within a heat recovery steam generator used in a combined gas turbine and steam turbine power plant. This is...
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3388553 |
Control system for a turbogenerator and once-through steam generator plant
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3247671 |
Boiler-turbine control system
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3089308 |
Regulating system for steam power plants with forced-flow boilers
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