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| Number | Title | Issue Date |
| 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 generating means for generating electricity, and a duct arranged to ... | 04/15/2008 |
| 7260934 | External combustion engine An organic Rankine engine used to power a vehicle is provided with a quick-start system of pumps, electric heaters or pistons to generate a pressure differential across the motor, prior to the engine reaching operating conditions. ... | 08/28/2007 |
| 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 maximum pressure level of the expander or evaporator is produced within ... | 01/09/2007 |
| 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 balance between the steam flow rate and the feedwater flow rate of each tur... | 06/13/2006 |
| 6957540 | Multi-mode complex cycle power plant A power plant (10) including a boiler unit portion (12) and a gas turbine unit portion (14) operable in multiple modes, including operation of the boiler unit portion independent of the gas turbine unit portion. Exhaust gas from the gas turbine ... | 10/25/2005 |
| 6951105 | Electro-water reactor steam powered electric generator system An electro-water reactor steam powered electric generator system includes a steam boiler having water and steam chambers, a water intake pipe and a plurality of steam delivery pipes. An electric resistance heater is mounted under and around the boiler having power l... | 10/04/2005 |
| 6918356 | Method and apparatus for optimizing a steam boiler system A method for controlling a steam boiler or oil heater for maximum fuel efficiency by systematically finding the most fuel-efficient combination of input control values. A characteristic multi-dimensional look-up table is created by temporarily operating the process ... | 07/19/2005 |
| 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 plants, wherein, by a three-component control by means of a s... | 06/30/1998 |
| 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 pressure return manifold, A fluid pressure driven motor i... | 08/27/1996 |
| 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 plant. In addition, allowable upper limits of operation consi... | 05/02/1995 |
| 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 balance between the hot gases supplied to the boiler and the ... | 08/24/1993 |
| 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 combustion zone, a water vapor accumulator, which communicate... | 12/05/1989 |
| 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 generating apparatus (6,12,14,16), the steam generating appa... | 10/03/1989 |
| 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 temperature difference signal for control of a changeover element... | 05/02/1989 |
| 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 condensate from the condensate pumps. The drain recovery syste... | 12/15/1987 |
| 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 system load among a plurality of generators, wherein vari... | 08/04/1987 |
| 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 command signal by correcting the load command signal on the ba... | 03/31/1987 |
| 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 fluid system. The heat transfer fluid is at the interface... | 07/22/1986 |
| 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 by using the detected values representing the conditions ... | 03/18/1986 |
| 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 therein by a jet pump with its jet nozzle in liquid flow ... | 03/04/1986 |
| 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 generating equipment so as to limit thermal stresses, drum level s... | 03/20/1984 |
| 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 chamber and conduits for supplying a mixture of fuel and air t... | 05/24/1983 |
| 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 automatically commanded by a boiler feedwater control system. During ... | 01/18/1983 |
| 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, while a feedback correction signal is calculated on the basis... | 03/09/1982 |
| 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 plant. During the start-up, before the pressure ramp ends... | 09/01/1981 |
| 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 tracking, each of the subordinate sensors having a relati... | 08/18/1981 |
| 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 the real measured water level and a reference level, the pro... | 06/23/1981 |
| 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 response to separator level and then by drain valve control in... | 01/17/1978 |
| 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 signal is then delivered to the I-member. A further P-mem... | 09/20/1977 |
| 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 connected between the input and output sides of each pump. An e... | 05/03/1977 |
| 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 expander. The vaporized working fluid expands and is subsequen... | 03/09/1976 |
