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Topic: Gas turbine

In the News (Tue 21 May 13)

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	Gas Turbine Engines\|Combustion Turbine
		You may have never heard of Gas turbine engines, but they are used in all kinds of unexpected places.
		Gas turbines are used on ships, locomotives, helicopters, and in tanks.
		Also, turbines have historically been more expensive to produce than piston engines, though this is partly because piston engines have been mass-produced in huge quantities for decades, while small turbines are rarities.
	gas-turbine.freehostia.com (780 words)

	TURBOCHARGER GAS TURBINE - Page 1
		A gas turbine is an engine where fuel is continuously burnt with compressed air to produce a stream of hot, fast moving gas.
		The hot exhaust gas flows from the end of the flame tube past the turbine (red) rotating it as it passes.
		The turbine wheel is also contained in a volute housing but in this case hot exhaust gases from the engine are fed in from the edge of the housing and flow out from the centre of the wheel.
	www.asciimation.co.nz /turbine (2891 words)

	Gas turbine
		Although the gas turbine must be started by some external means (a small external motor or other source, such as another gas turbine), it can be brought up to full-load (peak output) conditions in minutes as contrasted to a steam turbine plant whose start up time is measured in hours.
		The gas turbine exhaust is then used to produce steam in a heat exchanger (called a heat recovery steam generator) to supply a steam turbine whose output provides the means to generate more electricity.
		3): the compressor, the combustor and the turbine.
	www.students.itu.edu.tr /~yildirimo4/ozet.htm (3003 words)

	gas turbine
		A type of turbine in which combusted, pressurized gas is directed against a series of blades connected to a shaft, which forces the shaft to turn to produce mechanical energy.
		Gas turbine development accelerated in the 1930s as a means of propulsion for jet aircraft.
		The gas turbine share of the (world) power generation market has climbed from 20% to 40% of capacity additions over the past 20 years with this technology seeing increased use for base load power generation.
	www.daviddarling.info /encyclopedia/G/AE_gas_turbine.html (425 words)

	Gas turbine at AllExperts
		This is directed over the turbine's blades, spinning the turbine and powering the compressor, and finally is passed through a nozzle, generating additional thrust by accelerating the hot exhaust gases by expansion back to atmospheric pressure.
		Gas turbines are described thermodynamically by the Brayton cycle, in which air is compressed isentropically, combustion occurs at constant pressure, and expansion over the turbine occurs isentropically back to the starting pressure.
		Gas turbines are used in many naval vessels, where they are valued for their high power-to-weight ratio and their ships' resulting acceleration and ability to get underway quickly.
	en.allexperts.com /e/g/ga/gas_turbine.htm (2799 words)

	Gas Turbine
		The Gas turbine when employed in stationary applications, is the basis of a very compact generating set making it the perfect solution for co-generation applications where the gas turbine module and heat recovery equipment need to be integrated in the limited space of existing plants (e.g.
		The gas producer module consists of the compressor with 7 axial and 1 centrifugal stages and is driven by a two-stage axial turbine.
		The power take-off of the turbine is connected to the gearbox via a high speed shaft with membrane type flexible coupling and crowned spline connection to the gear.
	www.usedprocessequipment.com /html/gas_turbine.html (1635 words)

	Steam and Gas Turbines (Site not responding. Last check: 2007-11-07)
		Combustion turbines are also able to burn a wide range of liquid and gaseous fuels from crude oil to natural gas.
		Combustion (gas) turbine development accelerated in the 1930’s as a means of propulsion for jet aircraft.
		The gas turbine share of the (world) power generation market has climbed from 20 % to 40 % of capacity additions over the past 20 years with this technology seeing increased use for base load power generation.
	www.uaf.edu /energyin/webpage/pages/heat_engines/steam_and_gas_turbines.htm (779 words)

	How Gas Turbine Work
		The turbines used in a hydroelectric plant look completely different from a steam turbine because water is so much denser (and slower moving) than steam, but it is the same principle.
		Gas turbine engines are also smaller than their reciprocating counterparts of the same power.
		Gas turbines also tend to use more fuel when they are idling and they prefer a constant load rather than a fluctuating load.
	www.massengineers.com /Documents/howgasturbinework.htm (1232 words)

	18-Gas Turbine Technology Brochure
		Optimum performance and reliability of gas turbines in aeropropulsion, electrical power generation, and compressor or pump drives is achieved by careful balancing of conflicting demands that include low seal leakage without rubs, low weight without excessive vibration, high temperatures with long life, and blades free of vibration over a range of flow and speed conditions.
		Gas turbines are the power source of choice in many applications for mechanical drive of machinery and for electrical power generation.
		This gas turbine combustor facility was developed to study the effects of fuel properties on flame radiation, liner temperature, exhaust smoke, gaseous emissions, cold weather and altitude ignition, and flame stabilization.
	www.swri.org /3pubs/brochure/d04/turbn/turbn.htm (1879 words)

	18-Gas Turbine Technology Brochure
		Optimum performance and reliability of gas turbines in aeropropulsion, electrical power generation, and compressor or pump drives is achieved by careful balancing of conflicting demands that include low seal leakage without rubs, low weight without excessive vibration, high temperatures with long life, and blades free of vibration over a range of flow and speed conditions.
		Gas turbines are the power source of choice in many applications for mechanical drive of machinery and for electrical power generation.
		This gas turbine combustor facility was developed to study the effects of fuel properties on flame radiation, liner temperature, exhaust smoke, gaseous emissions, cold weather and altitude ignition, and flame stabilization.
	www.swri.edu /3pubs/brochure/d04/turbn/turbn.htm (1879 words)

	PowerLabs Turbine!
		Turbine combustion chambers are very intricate designs which involve a deep knowledge of thermodynamics, flame and combustion dynamics, heat transfer, materials science and fuel chemistry.
		In order for the turbine to be safely operated a few key parameters must not be exceeded: due to the self-sustaining nature of induction fed engines, a turbine is perfectly capable of spinning itself to complete destruction when fed enough fuel.
		Turbine tests with nozzle and afterburner: We have welded a 5.5" diameter x 8 inch long pipe with a 3" diameter outlet at the end to serve as a nozzle.
	www.powerlabs.org /turbine.htm (3408 words)

	Gas Turbine - NFCRC Tutorial
		Clean fuels such as natural gas, distillate derived from the refining of petroleum and gas derived from gasification may be used for direct firing in the gas turbine.
		With current state of the art gas turbine technology (in 1997), combined cycles with efficiencies in the neighborhood of 55% on a fuel LHV basis can be achieved and are projected to increase to 60% within next couple of years.
		When gas turbines were first applied in the electric power generation industry some 20 years ago, the majority of the power generated by the gas turbines was for peaking load service.
	www.nfcrc.uci.edu /EnergyTutorial/gasturbine.html (685 words)

	Chrysler turbine engines and cars
		These studies showed that, although the gas turbine engine had strong possibilities of being an ideal automobile engine, neither materials nor techniques had advanced to the point where the cost and time of intensive research would be warranted.
		To qualify initially as a turbine prospect, a candidate must own a car (or, be a member of a household in which a car is owned by the head of the household) and must have a valid driver's license.
		Although the progress of the gas turbine and its advantages are impressive, additional progress in improved component efficiencies (particularly in the compressor) and the future possibility inherent in increased operating temperatures, are extremely promising.
	www.allpar.com /mopar/turbine.html (5102 words)

	The Future of Things (TFOT) - Engine on a Chip — the Dream of the Personal Turbine
		In a gas turbine (also known as combustion-turbine), hot gases produced from the combustion of natural gas in a high-pressure combustion chamber are passed through the turbine, which spins the generator to produce electricity.
		Gas turbines are commonly used to serve the peak loads of the electric utility and have grown in size and complexity over the years.
		A gas turbine, both large and small consists of a compressor, a combustion chamber, and a turbine that is driven by the combustion exhaust and powers the compressor.
	www.tfot.info /content/view/114/58 (3171 words)

	Second law Analysis of Gas Turbines...simple, combined, heat, exchange, recuperated, fuel, cell, solid, oxide, engine, ...
		In general when it is stated that a certain gas turbine had an exergy efficiency of 85% it refers to the percentage of exergic energy in an amount of caloric energy that was consumed using the terms from Fig 1.
		All 6 gas turbines were evaluated with the same formulas, however compressor and turbine efficiencies and pressure losses were altered for all gas turbines to fall in line with the type of engine.
		To model the gas turbine compression process, a piston in a cylinder is used as shown in Fig 5a.
	www.benwiens.com /energy2.html (5528 words)

	Gas Turbine
		The locomotive gas turbine differs from the aircraft jet engine in that the gases it produces are harnessed within the power plant and the resultant power is transmitted electrically to drive the wheels, whereas the aircraft engine provides forward thrust from the reaction of its exhaust stream.
		General Electric's own research in gas turbine development dates from 1904, when gas turbines were operated at both Lynn, Mass., and Schenectady, N.Y. The most significant resplts of the ensuing 45-year period are the G-E turbo - supercharger and G-E aircraft-type gas turbines.
		Before World War II the company bad actively undertaken development of gas turbines for such applications as locomotives, ships, small industrial plants, or central stations, but this was side- tracked during the war.
	www.railpower.com /2support/locomotives.htm (916 words)

	Gas Turbine Propulsion
		Early gas turbine engines worked much like a rocket engine creating a hot exhaust gas which was passed through a nozzle to produce thrust.
		Because gas turbine engines are so important for modern life, we will be providing a lot of information about turbine engines and their operation.
		Turbine engines come in a wide variety of shapes and sizes because of the many different aircraft missions.
	www.grc.nasa.gov /WWW/K-12/airplane/turbine.html (547 words)

	DOE - Fossil Energy: How Turbine Power Plants Work
		Gas flowing through a typical power plant turbine can be as hot as 2300 degrees F, but some of the critical metals in the turbine can withstand temperatures only as hot as 1500 to 1700 degrees F. Therefore, air from the compressor might be used for cooling key turbine components, reducing ultimate thermal efficiency.
		The advanced turbines that emerged from the Department's research program were able to boost turbine inlet temperatures to as high as 2600 degrees F - nearly 300 degrees hotter than in previous turbines, and achieve efficiencies as high as 60 percent.
		With the higher temperatures achieved in the Energy Department's turbine program, future hydrogen and syngas fired gas turbine combined cycle plants are likely to achieve efficiencies of 60 percent or more.
	www.fe.doe.gov /programs/powersystems/turbines/turbines_howitworks.html (571 words)

	Gas Turbine Technology — Turbine Cowboy (Site not responding. Last check: 2007-11-07)
		Cross-bred from aeroderivative technology of the jet engines, first introduced at end of the war, with the tried and true evolution of steam turbine generation, the combusiton (gas) turbine was applied to power generation around 1948.
		First major gas turbine installation of three frame 3 gas turbines that were intercooled, regenerative cycle rated at 5000 KW.
		Gas pipelines emanate primarily from Texas, Louisiana and Oklahoma and then flow northeastward toward Chicago, Detroit, New York and the east coast.
	www.turbinecowboy.com /GTT (463 words)

	Romawa - Gas Turbine
		The possibility of radio-active dust entering the helium circuit and through a leak of one or more pebbles in the gas flow of the gas turbine is always mentioned, however the helium ventilator which was used in Jülich, never showed radio-active contamination.
		In this case the efficiency of the open air cycle gas turbine will be reduced due to the increase of the resistance in the system caused by the IHX.
		In case of the open air cycle the gas turbine needs filtrated air as transport medium to bring the reactor energy from the IHX to the turbines.
	www.romawa.nl /nereus/gasturbine.html (675 words)

	How does a gas turbine work
		However, combustion in a motor car engine is intermittent and the expanding gas produces shaft power through a piston and crank, whereas in a jet engine combustion is continuous and its power results from expanding gas being forced out of the rear of the engine.
		The rotating turbine blades are carried on discs, which are connected by a shaft to the compressor.
		Because the fuel in a gas turbine burns in an excess of air, sufficient oxygen remains in the exhaust to support further combustion, particularly in a turbofan.
	www.gasturbineowners.com /how_does_a_gas_turbine_work.htm (1300 words)

	Gas Turbine Air Filters,Gas Turbine Air Filter Cartridges,Manufacturers
		Gas Turbine Air Filters,Gas Turbine Air Filter Cartridges,Manufacturers
		Gas turbine air intake filter cartridges and Dust collection filters produced by Polymer Papers are most suited for all latest high performance gas turbines which are sometime subjected to extreme dusty and humid conditions.
		Other gas turbine air intake filters include a complete range of Pre and fine static panel type filters in different sized and media as required by the customers.
	www.polymerpapers.com /polyfilgasturbines.htm (270 words)

	New gas-turbine designs push the envelope
		A trio of new gas turbines point the way to more efficient and cleaner power generation for utilities, mechanical drives for industry, and compressors for pipelines and platforms.
		Second, the time needed to install gas turbines is also low, averaging under a year for simple-cycle operation [fuel burned to turn an electrical turbine] and under two years for combined-cycle operation [where exhaust heat is captured to produce additional power].
		Engineers from EGT increased the compressor and high-pressure stages, and added a free power turbine to their proven Tempest gas turbine to create a train shaft engine with a simple-cycle efficiency exceeding 35 percent.
	www.memagazine.org /backissues/august97/features/turbine/turbine.html (2496 words)

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