Showing papers on "Ram air turbine published in 2002"

Solar power enhanced combustion turbine power plants and methods

Abstract: Combustion turbine power plants and methods of operating the same are provided in which air is cooled using solar energy and supplied to an air inlet of the power plant to support combustion. Also, combustion turbine power plants and methods of operating the same are provided in which steam is produced using solar energy and injected into a turbine of the power plant.

Micro volume actuator for an air turbine starter

Abstract: An air turbine starter system and air turbine starter valve that has a microvolume actuator to prevent the connected butterfly valve from opening too quickly. Air turbine starter valves can in some circumstances freeze shut, but may be opened by normal actuator operation. Such operation may open the valve too quickly due to stored potential energy. A sharp pressure transient may be inflicted upon the connected air turbine starter which can cause damage. The microvolume actuator air turbine starter system set forth herein allows generation of sufficient force to break ice and move the valve while minimizing stored potential energy that could open the valve too quickly.

Integrated air turbine driven system for providing aircraft environmental control

Abstract: The present invention relates to an integrated air turbine driving system for providing aircraft environmental control. The system has at least one air driven turbine for providing power to an aircraft mounted accessory drive and for providing heated air to an aircraft anti-ice system. The system further has a subsystem for supplying cooled pressurized air to a flight deck and/or cabin and to aircraft avionics. Still further, the subsystem provides cooling air to other aircraft components such as a generator and/or an aircraft mounted accessory drive.

Ram air turbine with high power density generator and self-contained fluid cooling loop

Abstract: A ram air turbine system (10) provides liquid cooling of its generator (14) by employing a closed loop liquid cooling line originating from a pump (20) in the gearbox (16) of the system. In the preferred embodiment the pump may be a pitot pump to which gearbox lubricating oil may be channeled along a trough (28) that is located in the gearbox. At least a portion of the trough is immersed in the oil which travels along the trough toward the pump in response to turbine shaft rotation. The oil is directed into a cooling jacket which is integral to the generator and then to a heat exchanger (18) exposed to airflow. The oil is then returned to the gearbox.

Air turbine for combustion engine

Abstract: An air turbine apparatus for use with a combustion engine either as a muffler or as an air intake device is comprised of a housing defining an expansion chamber and an airfoil positioned within the housing The airfoil includes a central aperture extending longitudinally therethrough that is in fluid communication with both the inlet and the outlet of the housing The airfoil is configured to allow gases flowing through the inlet to flow between the outer edge of the airfoil and the housing and through the aperture of the airfoil In addition, the air traveling through the housing is caused to spin as it travels through the housing This rotational flow increased the rate of flow of gases through the air turbine device A chop core is provided between the airfoil and the outlet of the housing to encourage turbulent flow of gases without restricting flow to produce a muffling effect and thus a dampening of noise from the combustion engine

Integrated system for providing aircraft environmental control

Abstract: The present invention relates to an integrated enviromental control system for an aircraft. The system uses bleed air from a propulsion engine to drive an air turbine which provides power to at least one aircraft component such as an aircraft mounted accessory drive. The system uses the bleed air exiting the air turbine as an air source for the cabin and/or flight deck enviromental control system.

Method for operating a turbine

Abstract: A method of operating a turbine arranged in a compressed air energy storage power generation plant comprises an open-loop control of an air mass flow applied within a lower turbine speed range and a closed-loop control of the turbine speed within a higher turbine speed range. The open-loop control comprises the control of the air mass flow by means of air inlet valves and a free development of the turbine speed. The closed-loop control comprises the control of the turbine speed by means of a speed controller, which is acted upon by a speed limiting value determined according to the current air mass flow and a windage calculation. The speed controller activates a static frequency converter in the case that the turbine speed reaches values that are critical with respect to turbine windage or rotor dynamics.

Jet fuel and air system for starting auxiliary power unit

Abstract: A system for starting an APU, including an air control valve assembly located in the air flow passageway extending between a source of pressurized air and a turbine power modulator. The system further includes a fuel control valve assembly located in the fuel flow passageway extending between a source of jet fuel and the turbine power modulator. Upon energizing the air control and fuel control valves, a mixture of compressed air and jet fuel entering the turbine power module is ignited, creating a flow steam of hot gases for driving a gas turbine to power the APU.

Vapor compression cycle environmental control system

Abstract: The present invention relates to a vapor compression cycle environmental control system for use on aircraft. The system includes an environmental control subsystem which supplies pressurized ram air at a desired temperature to the aircraft's flight deck and/or cabin. The environmental control subsystem uses a vapor compression cycle subsystem to provide the ram air at the desired temperature. The system further includes an air turbine driven by engine bleed air to provide power to an aircraft mounted accessory drive and to provide heated air to an anti-ice system. The aircraft mounted accessory drive provides power to an air compressor which forms part of the environmental control subsystem and to a working fluid compressor which forms part of the vapor compression cycle subsystem.

Heating device and method for deployable ram air turbine

Abstract: The heating apparatus and method for the nose fairing of a rotating blade assembly has an electrical generator connected to a heating element attached to the interior of the forward end of the nose fairing. The electrical generator has a rotor with conductor windings attached to the aft end of the rotating blade assembly hub housing. The stator of the electrical generator is attached opposite the rotor on the support structure for the hub housing with stator magnets spaced from and opposite the rotor windings. When the hub housing is rotated by for example airflow through the blades of the rotating blade assembly the rotor moves relative to the stator thereby creating an induced current in the windings. This converts the rotational energy to electrical energy to power the heater to heat the nose fairing to inhibit the formation of ice thereon.

Performance Analysis of Evaporative Biomass Air Turbine Cycle With Gasification for Topping Combustion

Abstract: This paper investigates the performance of a new power cycle, a so called evaporative biomass air turbine (EvGT-BAT) cycle with gasification for topping combustion. The process integrates an externally fired gas turbine (EFGT), an evaporative gas turbine (EvGT), and biomass gasification. Through such integration, the system may provide the potential for adapting features from different advanced solid-fuel-based power generation technologies, e.g., externally fired gas turbine, integrated gasification combined cycle (IGCC), and fluidized bed combustion, thus improving the system performance and reducing the technical difficulties. In the paper, the features of the EvGT-BAT cycle have been addressed. The thermal efficiencies for different integrations of the gasification for topping combustion and the heat recovery have been analyzed. By drying the biomass feedstock, the thermal efficiency of the EvGT-BAT cycle can be increased by more than three percentage points. The impact of the outlet air temperature of the high-temperature heat exchanger has also been studied in the present system. Finally, the size of the gasifier for topping combustion has been compared with the one in IGCC, which illustrates that the gasifier of the studied system can be much smaller compared to IGCC. The results of the study will be useful for the future engineering development of advanced solid fuel power generation technologies.

High energy particle arrestor for air turbine starters

Abstract: One or more particle arrestor rings are mounted in a curved radial flow portion of a gas turbine annular flow passage. The arrestor rings block line of sight paths between the turbine wheel and the annular flow passage outlet. Thus, the arrestor rings substantially inhibit relatively high energy particles from exiting the gas turbine housing, thus substantially inhibiting collateral domage to surrounding equipment and structure.

Development of a Highly Loaded Rotor Blade for Steam Turbines

Abstract: In order to improve steam turbine internal efficiency, a new highly loaded rotor blade for the high and intermediate pressure (HIP) stages, has been developed. The blade configuration is expressed by a 5th-order Bezier curve and an interactive technique is adopted in combination with a 2-D turbulent blade-to-blade flow analysis. The inverse method is adopted to modify the blade shape by optimizing the blade aerodynamic loading distribution near the root section which should decrease not only profile loss, but also endwall loss. Three-dimensional stage flow analysis and air turbine tests are carried out to verify the stage performance of the new blade. It is found that the new blade has improved blade performance near the root and the midspan; in particular, higher blade performance near the midspan contributes to an improvement in stage efficiency by about 0.3% at the design point. Consequently, it is verified that the new rotor blade is effective to improve steam turbine internal efficiency and to lower manufacturing cost by reducing the blade number by 15%.

Method and apparatus for charging electric vehicles

Abstract: A battery charger for an electric vehicle is provided. The battery charger includes an air scoop to receive a flow of air. A turbine then receives the flow of air from the air scoop during vehicular operation. The flow of air causes the turbine to rotate. A generator coupled to the turbine generates electricity when the turbine rotates. The electricity generated by the generator charges a battery coupled to the generator.

High efficiency gas turbine power generator

Abstract: A gas turbine power generator with ultra high efficiency, the generator being an assembly of electric motor-generator machines and counter rotating turbine configurations used in combination with a combustor having cogeneration of steam for combined cycle operation of select turbine configurations.

Muffler for suction system exhaust air used with an automatic cutting machine

Abstract: A noise reduction system for significantly reducing the noise generated by an air turbine used to create suction for automatic cutting tables. The system employs one or more baffles mounted within a closed main housing including noise reduction foam and an exhaust housing lined with noise reduction foam mounted around the baffle exhaust. The direction of the exhaust air is changed 180 degrees and is utilized for cooling the air turbine and electric motor.

Power generation apparatus

Abstract: A power generation apparatus (100) includes a gas turbine (106) and generator (136). The generator (136) is cooled by bleeding air from a main compressor (108) of the gas turbine and through a heat exchanger (102) and secondary turbine (134). The secondary turbine (134) drives a secondary compressor (142) which compresses natural gas fuel to be delivered to a combustor (110) of the gas turbine.

Gas turbine and air turbine installation and method of operating a power station installation, in particular a gas turbine and air turbine installation

Abstract: A gas turbine and air turbine installation includes a gas turbine to which, downstream of its exhaust gas end, the primary side of a heat exchanger for heating air is connected. In this arrangement, the heat exchanger includes an air turbine connected downstream of its secondary side. By this, a gas turbine and air turbine combined process can be realized which, compared with a pure gas turbine process, is associated with an increase in efficiency and power. The installation concept can be employed particularly advantageously in areas short of water where a conventional gas/steam installation or a steam power installation can hardly be realized because of the requirement for water. Further, a method of operating a power station installation involves waste heat in the exhaust gas of a gas turbine being used to do work to drive an air turbine.

Vacuum cleaning tool with rotating brush roller

Abstract: A vacuum cleaning tool of a vacuum cleaning device has a housing with a turbine chamber and a working chamber. The housing has a suction slot extending transversely in the vacuum cleaning tool. A suction airflow generated by the vacuum cleaning device enters the working chamber via the suction slot. First and second flow connections between the working and turbine chambers allow the suction airflow to enter the turbine chamber. An air turbine in the turbine chamber is rotatably driven by the suction airflow and drives a cleaning tool in the working chamber. The housing has an outlet opening allowing the suction airflow to exit the turbine chamber. The first and second flow connections are located on opposite sides of an imaginary plane defined by the axis of rotation of the air turbine and a center of the outlet opening. The cross-section of one of the flow connections is adjustable.

Wind power plant with vertical axis turbine

Abstract: The present invention relates to a wind-power unit comprising a wind turbine and an electric generator connected to the wind turbine. The stator of the generator has a winding comprising a high-voltage cable comprising a core of conducting material, a first layer of semiconducting material surrounding the core. An insulating layer of solid material surrounds the first layer, and the insulating layer is surrounded by a second layer of semiconducting material. In accordance with the invention the wind turbine is provided with a plurality of turbine blades running substantially vertically and connected to a turbine shaft running substantially vertically, and the generator is arranged at the lower end of the turbine shaft. The invention also relates to a wind-power plant, the use of a wind-power unit and a method of generating electric power.

Fuel cell compound gas turbine system

Abstract: PROBLEM TO BE SOLVED: To increase a design freedom of a fuel cell compound gas turbine system. SOLUTION: A gas turbine 10 comprises a compressor 2, a combustor 4, and a turbine 6. A part of compressed air generated by the compressor 2 is extracted from an intermediate compression stage 2a and sent to a fuel cell 20 by a pipe 40. The remaining compressed air is sent to the combustor 4 as combustion air, and thereat fuel such as natural gas, kerosene, and heavy light oil is supplied and burnt and generates high temperature and high pressure combustion gas. This combustion gas is injected to the turbine 6 to turns this. A generator 30 is connected to a turbine shaft 8 constituting the turbine 6, and by the revolution of the turbine 6, the generator 30 is driven and electric power is generated. The combustion gas after driving the turbine 6 is discharged to the outside of the gas turbine 10 as exhaust gas. COPYRIGHT: (C)2004,JPO

Air Turbine With Staggered Blad Es For Wave Power Conversion

Abstract: In a self-rectifying air turbine for wave energy conversion, it is reported that the rotor encountered different maximum velocities between the inhalation and exhalation processes of the oscillating water column. This paper describes the development of an efficient turbine suitable for such actual asymmetric flow conditions. The air turbine with staggered blades has been presented and investigated experimentally by model testing under steady flow conditions. The running and starting characteristics under pseudo-sinusoidal oscillating flow conditions were then clarified by using a quasi-steady analysis. As a result, it is found that the air turbine with staggered blades is superior to the Wells turbine, and a suitable choice of design factor has been suggested for the preset angle of the rotor.

Built-in hydraulic wave power float

Abstract: A built-in hydraulic wave power float is provided. The structure comprises a float main body, a center pipe, a bobber, a built-in oil cylinder, a piston, a driving oil pipe, a hydraulic motor, a generator, a storage battery, etc. With the energy acquisition and transfer conversion system in the bobber-piston-oil cylinder-hydraulic motor-generator-storage battery mode formed by the hydraulic motor, the generator and the storage battery which are arranged in the float main body as well as the bobber, the built-in oil cylinder, the piston and other components arranged in the center pipe, compared with the prior air turbine wave power float, the utility model is good in waterproof performance, low in failure rate, easy to start and high in energy transfer as well as conversion efficiency.

Portable air heater and electric power generator with compressor/turbine unit

Abstract: Apparatus with compressor/turbine unit for providing clean hot air and/or electric power. In the combustion cycle, combustible is burned in a combustor. The hot exhaust gases provide heat to a process air cycle via a heat exchanger. Remaining thermal energy can be discharged by an 'air-atmospheric air heat exchanger'. In the process air cycle, cold air flows through a compressor, is heated via the above mentioned heat exchanger and after this expands in a turbine. Turbine and compressor are coupled together on a single shaft. The remaining pressure of the air stream propels an air motor that drives a fan and a generator unit to produce electric energy. The fan mixes hot process air and cold secondary air and provides the mixed air to any place where it is used. Instead of the fan an ejector can be used.

Wind-turbine power plant

Abstract: wind-power engineering. SUBSTANCE: power plant has wind speed accelerator, air turbine, and dc generator with electromotive force regulator; novelty is that wind speed accelerator, double-stage air turbine, and dc generator with emf regulator are connected in series. EFFECT: enhanced efficiency and emf stability at wind speed and load variations. 6 cl, 8 dwg

Performance of air turbine using self-pitch-controlled blades for wave energy conversion

Abstract: SYNOPSIS This work investigated an air turbine with self-pitch-controlled blades operating in the airflow generated by an oscillating water column taking real air flows to the turbine into account in order to determine turbine performance and identify the optimum blade pitch angle setting. Experimental investigations were performed by model testing of a rotor with fixed blades under steady flow conditions. Then, the running and starting characteristics under sinusoidally oscillating flow conditions were obtained by a computer simulation using a quasi-steady analysis. As a result, the performances of the air turbine using self-pitch-controlled blades under real sea conditions were clarified, and a suitable choice of design factor has been suggested for the setting angle of the rotor.

Characteristic evaluation of the flowmeter using the Wells turbine for measurement of respiration

Abstract: A new turbine flowmeter for measurement of respiration using a bi-directional air turbine, the Wells turbine, which is suitable for wave energy conversion is proposed Characteristics of the turbine flowmeter have been experimentally evaluated using a test equipment simulating respiration From the results the following conclusions were obtained: Using this turbine flowmeter, the measurement of the period and the respiratory rate of respiration is possible The possibility of univocally obtaining a flow rate of an unsteady flow from the value of an angular velocity and acceleration of the turbine's rotation was shown by using the characteristic curve made beforehand