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| Number | Title | Issue Date |
| 7398652 | System for optimizing a combustion heating process A system for determining performance characteristics of a combustion heating process. The system uses input parameters that are controllable by an operator or control system to determine a set of controllable loss components. The controllable loss components may be ... | 07/15/2008 |
| 7333584 | Nuclear power plant and operation method thereof A nuclear power plant and method of operation for augmenting a second reactor thermal power output in a second operation cycle to a level larger than a first reactor thermal power output in the previous operation cycle. The plant is equipped, for example, with a rea... | 02/19/2008 |
| 7288921 | Method and apparatus for providing economic analysis of power generation and distribution An economic dispatch program optimally allocates load demand specifying real power and reactive power to be generated by a power plant among various power generators in a manner so that each of the power generators are operated within its optimal operating space as ... | 10/30/2007 |
| 7200996 | Startup and control methods for an ORC bottoming plant The invention is a system and method for smoothly starting and controlling an ORC power plant. The system comprises a cascaded closed loop control that accounts for the lack of relationship between pump speed and pressure at startup so as to control pump speed and p... | 04/10/2007 |
| 7165404 | Method for optimizing a large-scale industrial facility, especially a power plant The invention relates to a method for optimizing a large-scale industrial facility, especially a power plant, consisting of m subassemblies (BGj), wherein j=1(1)m) and wherein the following steps are successively carried out: comparing the parameters (KGj) of all su... | 01/23/2007 |
| 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 |
| 7121906 | Method and apparatus for decreasing marine vessel power plant exhaust temperature According to the present invention, a method and apparatus for generating power aboard a marine vessel is provided. The method comprises the steps of: (a) providing a Rankine Cycle device that includes at least one of each of an evaporator, a turbo-generator that in... | 10/17/2006 |
| 7120610 | Technique for effective management of resource consumption In an arrangement for accounting for consumption of a resource, e.g., utilization of a postal service or utilities, a data center (503, 803) periodically communicates with multiple franking systems (100, 505-1, 505-2, 505-n) dispen... | 10/10/2006 |
| 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 |
| 7019412 | Power generation methods and systems A closed loop system for generating mechanical energy at high efficiencies. The system can have a heating source, a superheater, an expander, a receiver, an absorber, a desorber, and regenerator with pumps and controls. The superheater heats a working fluid (a refri... | 03/28/2006 |
| 6959546 | Method and apparatus for energy generation utilizing temperature fluctuation-induced fluid pressure differentials A method and apparatus for producing energy is provided for generating renewable energy. Captive compressed fluid cycles between two coupled containers through a motive power source. The captive compressed fluid flows between the containers in response to a differen... | 11/01/2005 |
| 6952924 | Rankine cycle apparatus Rankine cycle apparatus, having closed working medium circulation circuitry, includes a collection mechanism for collecting a working medium leaked or discharged out of the circulation circuitry. The working medium collected via the collection mechanism is stored in... | 10/11/2005 |
| 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 |
| 5847266 | Recovery boiler leak detection system and method An improvement is disclosed for a boiler leak system that (a) measures fluid input into the recovery boiler system, (b) measures fluid output from the recovery boiler system, and (c) calculates fluid leakage loss based on an average difference between the... | 12/08/1998 |
| 5732664 | Boiler control system Apparati and methods for controlling the distribution of steam to a number of boilers, and for optimizing the performance of a steam boiler. The distribution of steam to the boilers is controlled by a master control system in communication with the boiler... | 03/31/1998 |
| 5559293 | Steam generation system mass and feedwater control system In a steam generator or boiler of the type having a pressure vessel having a zone in which heated water and steam can be separated, an outlet for the flow of pressurized steam and an outlet for the flow of liquid, a riser section in which fluid passes for... | 09/24/1996 |
| 5435138 | Reduction in turbine/boiler thermal stress during bypass operation A method of reducing turbine inlet temperature excursions during sudden load demand reductions on a steam turbine, the turbine being coupled to a controllable source of high pressure, high temperature steam, incorporates throttling of steam within the ste... | 07/25/1995 |
| 5419135 | Space-based power generator A power generation system for use in outer space includes a radiation receiver disposed for receiving energy from solar, stellar or planetary heat radiation. The radiation receiver includes at least two evaporator cells. Each of the evaporator cells has a... | 05/30/1995 |
| 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 |
| 5347466 | Method and apparatus for power plant simulation and optimization A system for simulating and optimizing a powerhouse, designed to furnish electrical power to a process plant, incorporates a plurality of units for simulating operation of the individual components of the powerhouse, and for calculating the cost of operat... | 09/13/1994 |
| 5329771 | Method for securing the lubrication of bearings in a hermetic high-speed machine The present invention is directed to a method for operating a hermetic, small-size power plant in which a primary circulation is conducted in a main line connecting a high-speed machine including at least a turbine and a generator installed on a joint rot... | 07/19/1994 |
| 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 |
| 5201180 | Method and apparatus for monitoring the operating condition of a steam turbine A method for monitoring the operating condition of a steam turbine, to which an adjustable inlet steam quantity can be supplied and from which a variable, partially expanded steam quantity can be extracted, includes initially ascertaining a relative inlet... | 04/13/1993 |
| 5172654 | Microprocessor-based boiler controller A microprocessor-based sequencer for a multiple boiler heating system which allows the plural boilers to operate in a base load mode whereby one or more boilers can be made to operate at their optimum operating points and as the heating demand changes, a ... | 12/22/1992 |
| 4976108 | Turbine efficient valve position computer A method and apparatus for controlling the operation of a steam turbine system, which system includes a source of steam under a controllable pressure, a plurality of governor valves connected between the source and the turbine first stage, each governor v... | 12/11/1990 |
| 4969084 | Superheater spray flow control for variable pressure operation A superheater spray water control system for variable pressure applications produces an output signal representative of expected superheater absorption as a function of measured steam flow, compensates the signal for temperature variations within the supe... | 11/06/1990 |
| 4955200 | Reheater piping and drain cooler system A method and apparatus for improving a steam-to-steam reheat system employing the drain cooler concept in a steam turbine is disclosed. The large and complicated drain receiver of the prior art is eliminated, thereby removing a source of unreliable perfor... | 09/11/1990 |
| 4909037 | Control system for once-through boilers A control for the fuel input to a once-through boiler connected to supply steam through a throttle valve to a turbine-generator so that the rate of energy delivery to the boiler matches the rate of energy demand on the boiler as represented by demand sign... | 03/20/1990 |
| 4887431 | Superheater outlet steam temperature control A method and apparatus for controlling superheater outlet temperature of a steam generator utilizes a feed-forward control signal to control a spray attemperator. The feed-forward control signal is developed as a difference between a selected flow rate fo... | 12/19/1989 |
| 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 |
| 4862692 | Supercritical pressure once-through boiler In order to obviate a short life and an expensive maintenance cost of boiler throttle valves as well as plant loss caused by pressure reduction at the boiler throttle valves in a supercritical pressure once-through boiler a supercritical pressure once-thr... | 09/05/1989 |
| 4860696 | Apparatus for controlling boiler system The output vapor pressure of a boiler system is controlled by selectively starting or stopping a plurality of boiler units (#1 to #4) shiftable between a high combustion state to a low combustion state in accordance with the output vapor pressure of the e... | 08/29/1989 |
| 4843824 | System for converting heat to kinetic energy A system for converting heat to kinetic energy, the system characterized by a fluid driven motor responsive to an introduction of high pressure fluid for driving a selected power train, and a pressure generator for introducing the high pressure fluid to t... | 07/04/1989 |
| 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 |
| 4827429 | Turbine impulse chamber temperature determination method and apparatus A method and apparatus for determining the steam temperature in the impulse chamber at the first stage exit of a multistage high pressure steam turbine utilizes measurement of steam pressure in the impulse chamber and steam pressure and temperature at the... | 05/02/1989 |
| 4777009 | Automatic steam generator feedwater control over full power range A water level control for a steam generator of a pressurized water type of nuclear steam supply system varies the water level demand as a function of power. The control also varies the water feed rate after a reactor trip initially as a function of reacto... | 10/11/1988 |
| 4747748 | Air turbine for preventing formation of ice on air exposed turbine parts An air turbine is provided and includes a stator having a guide wheel for moist air with guide passages placed between guide blade, a rotor having a runner and inner blade passages placed between the runner blades, and an annular intermediate space betwee... | 05/31/1988 |
| 4745757 | Combined heat recovery and make-up water heating system A cogeneration plant is disclosed in which the feedwater from the deaerator heater is placed in heat exchange relation with the makeup water before the makeup water is delivered to the deaerator heater. The amount of heat transferred from the feedwater to... | 05/24/1988 |
| 4745758 | System for economic unit load distribution during process load transition In a plant including a multiplicity of energy conversion units which together supply load upon demand to a given process through a common junction, a system is included to economically optimize the load distribution among the multiple units dynamically du... | 05/24/1988 |
