摘要:
A system and method for establishing communications in a power plant comprises a power generation system having an interface for establishing wireless communication, at least one power plant auxiliary system having an interface for enabling wireless communication, and a wireless communications link, having at least two redundant wireless communications channels, established between the power generation system and the power plant auxiliary system. The two redundant wireless communications channels may be two redundant wireless radio frequency channels. The communications link may be established utilizing a network communications controller which wirelessly communicates with the power generation system and the power plant auxiliary system. One or more of the power plant auxiliary systems may communicate with the network communications controller through a repeater.
摘要:
A combustion turbine power generating system and method in which the system includes a permanent magnet type AC power generator, a combustion turbine that drives the AC power generator, a first converter enabling conversion between AC current and DC current and having an AC side connected to the AC power generator, a second converter enabling conversion between AC current and DC current and having a DC side connected to a DC output side of the first converter, a capacitor connected between the first and second converters, a generator-speed control unit that controls the first converter and a DC voltage control unit that controls a DC-side voltage of the second converter. The generator-speed control unit controls the first converter on the basis of a number of revolution command value.
摘要:
A combustion turbine power generating system includes an AC power generator, a combustion turbine that drives the AC power generator, a first converter that can make conversion between AC current and DC current and having an AC side connected to the AC power generator, a second converter that can make conversion between AC current and DC current and having a DC side connected to a DC output side of the first converter, a smoothing condenser connected between the first and second converters, a generator-speed control unit that controls the first converter and a DC voltage control unit that controls a DC-side voltage of the second converter, thereby the generator-speed control unit controls the first converter on the basis of the number of revolution command value.
摘要:
A system for recovering and utilizing vapor from a source of vapor has a vapor holder for storing a quantity of vapor from the source of vapor. Also included is a condenser coupled to the vapor holder for receiving and condensing at least partially, vapor from the vapor holder. The system also has an engine and a generator driven by the engine for generating electrical power. The engine has an engine intake coupled to the condenser and an exhaust outlet. This engine is powered at least partially, by output from the condensing apparatus. The system also has a fuel adjustment apparatus and a fuel sensor apparatus. The fuel adjustment apparatus has a control input and is coupled between the engine and the condensing apparatus for adjusting fuel concentration into the engine intake in response to a signal on the control input. The fuel sensor apparatus is coupled to the engine intake (a) for sensing concentration of at least some constituents of vapor at the engine intake, and (b) for applying a signal to the control input of the fuel adjustment apparatus corresponding thereto. The system also includes an exhaust sensor apparatus coupled to the exhaust outlet for providing an exhaust signal signifying concentration of at least some constituents of the exhaust at the exhaust outlet.
摘要:
The invention concerns a device to generate mechanical work with a steam engine that works with a closed circuit and that has a feed water tank, a feed pump, an evaporator to generate steam, the steam engine, and a condenser. The invention is based on the problem of keeping a device of the initially cited kind free of damage from freezing water when the device is not operating and the environmental temperatures are low. To this end, an inert gas in the feed water tank (10) is used to expel the feed water from the other part (36) of the circuit to the feed water tank (10). This is done by switching a valve arrangement. The feed water tank (10) is designed so that it will not be damaged, for example by exploding from freezing water inside. The advantages of the closed circuit are retained. To restart the device, the system is reheated, and the valve arrangement only has to be switched back to the position suitable for normal operation.
摘要:
The present invention permits determination of steady-state off-design performance characteristics of a vehicle, such as a torpedo, powered by a closed cycle thermal propulsion system. The method may be utilized to determine propellant consumption for a torpedo resulting from various off-design kinematic maneuvers. Total run time may be calculated in response to a plurality of torpedo speed changes and/or torpedo configurations of variable torpedo length or torpedo diameter. The present invention may be utilized to define weapon design options for existing or future underwater weapons with mission requirements different from those for which the weapons were originally designed.
摘要:
The present invention relates to a flexible inlet tube for a high and intermediate pressure steam turbine. A reheat steam inlet tube is constructed integrally with a casing. The inlet tube has a double tube portion to form an annular groove. The lower end of the double tube portion has an expanded diameter, and a vertical sliding motion can be accomplished between the expanded diameter portion and a flange fixed to a thermal shield, so that thermal elongation is absorbed. Low-temperature steam flows into the annular groove from an in-casing space through a hole, circulates in the annular groove, and flows out to a steam passage in an intermediate pressure turbine section, by which the interior of the annular groove is cooled, so that a temperature rise of the casing can be prevented.
摘要:
Uninterruptible power supplies are provided that utilize a material to provide a source of thermal energy that may be converted to electrical energy to produce backup electrical power for a load. In some embodiments, a hot tank assembly is utilized to hold a liquid heated to a predetermined temperature. A closed-loop pipe containing, water for example, is immersed in the heated liquid. Upon the loss of primary power, the water flows into the heat exchanger where it is raised above its boiling temperature. The steam is then passed to a heat engine (e.g., a turbine-based system) that converts the heated steam to mechanical energy by causing the heat engine rotor to rotate. A generator is physically coupled to the heat engine so that the rotation of the heat engine rotor drives the generator. The generator produces AC power which is converted to DC and again back to AC before being provided to the load. In other embodiments, a solid mass, such as a block of iron, is heated to a predetermined temperature. The heat from the solid material is then converted to electrical energy for the load.
摘要:
A method to rapidly change a power output level of a steam turbine including the steps of: operating the steam turbine at a continuous power output level including regulating a steam temperature to a constant steam temperature set point; receiving a demand for a rapid change in the power output level of the steam turbine; adjusting the steam temperature set point to a temporary temperature excursion limit selected to achieve the demand for the rapid power change; regulating the steam temperature in the turbine to the temporary temperature excursion limit; operating the turbine at a temporary power output level achieved using the temporary excursion limit; generating power by the turbine using steam regulated to the temporary temperature limit, and changing the temperature used to regulate the turbine after a predetermined period.
摘要:
The thermal load to which a turbine is subjected is kept within an acceptable range by monitoring the change in temperature of the medium that is supplied to the turbine, especially fresh stream, over time. An emergency trip for the supply of fresh steam to the turbine preferably takes place if a maximum temperature gradient is exceeded.