Abstract: A system and method for increasing the responsiveness of a duct fired, combined cycle power generation plant (12) via operating one or more gas turbine engines (14) at a part load condition less than 100 percent load, one or more steam turbine engines (16), and one or more supplemental burners (18) providing additional heat to a heat recovery steam generator (20) upstream from the steam turbine engine (16) is disclosed. The combination of the steam turbine engines (16) and supplemental burners (18) operating together with gas turbine engines (14) at a part load condition enables the system to quickly change output to accommodate changes in output demand of the duct fired, combined cycle power generation plant (12). By operating the one or more gas turbine engines (14) at a part load condition, the gas turbine engines (14) are able to be used to increase net output of the combined cycle power generation plant (12) faster than relying on increasing output via duct firing.

Abstract: A system and method for increasing the responsiveness of a duct fired, combined cycle power generation plant (12) via operating one or more gas turbine engines (14) at a part load condition less than 100 percent load, one or more steam turbine engines (16), and one or more supplemental burners (18) providing additional heat to a heat recovery steam generator (20) upstream from the steam turbine engine (16) is disclosed. The combination of the steam turbine engines (16) and supplemental burners (18) operating together with gas turbine engines (14) at a part load condition enables the system to quickly change output to accommodate changes in output demand of the duct fired, combined cycle power generation plant (12). By operating the one or more gas turbine engines (14) at a part load condition, the gas turbine engines (14) are able to be used to increase net output of the combined cycle power generation plant (12) faster than relying on increasing output via duct firing.

Abstract: An air cooled heat exchanger, such as a combustion turbine intercooler or rotor cooler or an air cooled condenser, utilizes a pressurized gas fluid entraining misting device that evaporatively cools conduits carrying the cooled fluid medium. Evaporative cooling liquid is entrained in the pressurized gas where it is atomized for evaporative cooling of the heat exchanger conduits. In some exemplary embodiments of the invention the misting device is a jet pump or ejector that entrains a supply of non-pressurized cooling liquid. In other exemplary embodiments of the invention the misting device is a misting emitter that entrains a supply of pressurized cooling liquid.

Abstract: A combined cycle plant (10) including: a gas turbine engine (12) having a compressor (14), a combustor and a gas turbine (16); a heat recovery steam generator (20) (HRSG) configured to receive exhaust from the gas turbine engine; a steam turbine (22, 24) configured to receive steam from the HRSG; a supplemental air arrangement (40) configured to generate supplemental heated air (42) when operating and to operate independent of the gas turbine engine; and a kettle boiler (26, 28) configured to use heat from the supplemental heated air to generate steam used in the steam turbine.

Abstract: An air cooled heat exchanger, such as a combustion turbine intercooler or rotor cooler or an air cooled condenser, utilizes a pressurized gas fluid entraining misting device that evaporatively cools conduits carrying the cooled fluid medium. Evaporative cooling liquid is entrained in the pressurized gas where it is atomized for evaporative cooling of the heat exchanger conduits. In some exemplary embodiments of the invention the misting device is a jet pump or ejector that entrains a supply of non-pressurized cooling liquid. In other exemplary embodiments of the invention the misting device is a misting emitter that entrains a supply of pressurized cooling liquid.

Abstract: A combined cycle plant (10), including: a gas turbine engine (16) having a compressor (18), a combustor (20), and a gas turbine (22); and a heat recovery steam generator (HRSG) (36), a steam turbine (38), working fluid heated by the HRSG and effective to turn the steam turbine, and a blowdown heat transfer arrangement (90, 92, 94, 102, and 104) configured to capture heat present in blowdown water drawn from the working fluid and to transfer the heat to fuel (24) used in the combustor.

Abstract: A combined cycle plant (10), including a heat recovery steam generator (HRSG) (36), a working fluid which is heated by the HRSG and effective to operate a steam turbine (38), and a blowdown heat transfer arrangement (90, 92, 94,102, 104) configured to capture heat present in blowdown water drawn from the working fluid and to transfer the heat to injection water (28), a gas turbine engine (16) having a compressor (18), a combustor (20), and a turbine (22), and a water injection arrangement (30) configured to inject the injection water into the combustor

Abstract: A combined cycle plant (10) including: a gas turbine engine (12) having a compressor (14), a combustor and a gas turbine (16); a heat recovery steam generator (20) (HRSG) configured to receive exhaust from the gas turbine engine; a steam turbine (22, 24) configured to receive steam from the HRSG; a supplemental air arrangement (40) configured to generate supplemental heated air (42) when operating and to operate independent of the gas turbine engine; and a kettle boiler (26, 28) configured to use heat from the supplemental heated air to generate steam used in the steam turbine

Abstract: A power generation station (10), including: a combined cycle plant (12) having a gas turbine engine (20); a HRSG (30) configured to receive engine exhaust from the gas turbine engine and to generate steam, and a steam turbine (38, 40) configured to use the steam to develop mechanical energy; an auxiliary boiler (14) configured to generate heat used to create auxiliary steam for use in the combined cycle plant and to generate auxiliary boiler exhaust (52); and an auxiliary boiler exhaust heat transfer arrangement (16) configured to transfer heat present in the auxiliary boiler exhaust to the combined cycle plant.

Abstract: An electrical power system includes a power grid and a plurality of power plants connected to the power grid. A central repository including one or more electrical energy storage devices is connected directly to the power grid. The one or more energy storage devices are configured to be connected to the power plants via the power grid. The central repository is operable to draw a portion of a power output produced by one or more of the power plants via the power grid during a first period, for storage therein. The central repository is operable to discharge power to the power grid during a second period shifted in time from the first period. The discharged power is a function of a grid requirement or a function of a power demand notified by an individual power plant of the electrical system.

Abstract: A steam trap comprises a trap body having an inlet and an outlet each defining inner threads. The trap body further includes a spigot defining external threads. Also provided is a cap defining internal threads for engaging the external threads of the spigot of the trap body. A valve element freely moves inside a trap chamber defined between an inner surface of the cap and the valve seat of the spigot. The cap defines a top surface on which a disc of thermally insulative material is juxtaposed. A cup-shaped cover, which may carry indicia such as manufacturer name and model number, is received over the thermally insulative disc.

Abstract: A display medium including a plurality of electrically photosensitive particles positioned within at least one ambipolar shell to form at least one first composite particle, and a plurality of white particles encapsulated in a plurality of insulating shells to form a plurality of second composite particles. A photoelectrophoretic display and method of photoelectrophoretic imaging are also disclosed.

Abstract: A display medium including a plurality of electrically photosensitive particles positioned within at least one ambipolar shell to form at least one first composite particle, and a plurality of white particles encapsulated in a plurality of insulating shells to form a plurality of second composite particles. A photoelectrophoretic display and method of photoelectrophoretic imaging are also disclosed.

Abstract: Disclosed is a composition comprising a matrix which comprises particles comprising a core resin and a shell resin thereover, wherein at least one of the core resin and the shell resin contains a chelating agent and a spiropyran compound of the formula wherein n is an integer representing the number of repeat —CH2— units and R is —H or —CH═CH2, wherein the shell resin is the continuous phase of the matrix, wherein the spiropyran compound can produce changes in the optical and photoactive properties of the resin containing the spiropyran when irradiated.

Abstract: A process forms images on a substrate, and develops the images with toner. The substrate has a coating of a polymer that enables images of uniform gloss.

Abstract: A process which comprises forming an image on a substrate, and developing the image with toner, and wherein the substrate contains a coating of a polyester and there is enabled images of high uniform gloss.

Abstract: A process which comprises forming an image on a substrate, and developing the image with toner, and wherein the substrate contains a coating of a polyester and there is enabled images of high uniform gloss.

Abstract: Disclosed is a method of creating simulated, photographic-quality prints using transparent polyester substrates such as Mylar.RTM.; polypropylene, and the like. Reverse or wrong reading images are formed on the substrate using a linear or crosslinked low melt polyester toner and mixtures thereof. The reverse or wrong reading images are permanently adhered to the polyester substrate followed by the application of a backing member to the imaged transparent substrate. The backing member is characterized by being opaque and being coated with linear or crosslinked low melt polyester resin system to generate high fidelity, grain free photographic-quality images with reduced curl and improved adhesion due to similar rheological responses of the compatible materials in the toner, imaging substrate and the backing substrate.

Abstract: A photovoltaic cell wherein the photoactive layer comprises a thin layer of metal-free phthalocyanine dispersed in a binder. The electrical output is greatly in excess of that obtained from prior art organic semiconductor photovoltaic cells of the same surface area.

Abstract: A photovoltaic cell having an improved barrier electrode comprising indium or tin. The cell utilizes metal-free phthalocyanine dispersed in an electrically insulated binder as the photoactive layer in contact with an ohmic electrode.