A gas turbine is a rotary machine, consists of three main components - a compressor, a combustion chamber and a turbine. The air after being compressed into the compressor is heated, and then the heated air is expanded in a turbine resulting in work output, a substantial part, about two-thirds, of which is used to drive the compressor. The rest, about one-third, is available as useful work output.
A gas turbine extracts energy from a flow of hot gas produced by combustion of gas or fuel oil in a stream of compressed air. It has an upstream air compressor (radial or axial flow) mechanically coupled to a downstream turbine and a combustion chamber in between. "Gas turbine" may also refer to just the turbine element.
Energy is released when compressed air is mixed with fuel and ignited in the combustor. The resulting gases are directed over the turbine's blades, spinning the turbine, and mechanically powering the compressor. Finally, the gases are passed through a nozzle, generating additional thrust by accelerating the hot exhaust gases by expansion back to atmospheric pressure.
Energy is extracted in the form of shaft power, compressed air and thrust, in any combination.
Industrial or Aero derivative
Gas turbines are traditionally divided into two categories: Industrial and Aero Derivative Where Industrial Gas turbines are used for heavy duty such as power plants using journal bearings and heavy construction. Aero derivative comes as the name indicates from light weight air traffic constructions, using rolling element bearings. Aero derivative gas turbines will typically be used in offshore industry where light weight is of importance.
Advantages of gas turbine engines
Very high power-to-weight ratio, compared to reciprocating engines;
Smaller than most reciprocating engines of the same power rating.
Moves in one direction only, with far less vibration than a reciprocating engine.
Low operating pressures.
High operation speeds.
Low lubricating oil cost and consumption.
Vericor produces two models of gas turbines: VPS, for stationary applications -
VPS Series Gensets for Cogeneration & Power Generation
Greater power, higher efficiency and availability are key issues for power generation markets. With more than 15 million hours of proven performance, the cornerstones of Vericor's VPS Series packages are the compact, rugged, and reliable ASE Series aero-derivative gas turbines. Vericor's aero-derivative based solutions have high power density making them ideal for putting maximum power in a relatively small package. They also can be continuously started and stopped, enabling users to easily meet varying power requirements without compromising performance. In addition, they can operate on natural gas, distillate and oil, as well as various waste gases and bio-fuels.
Vericor's VPS Series packages offer the smallest footprint and lowest installed weight in their power class and can easily be integrated into your existing power plant. Veroicor's packages are factory-tested prior to shipment—Vericor delivers a generator set that is ready for rapid installation, easy commissioning and reliable operation. Vericor's highly integrated packages house the gas turbine, generator and auxiliary systems reducing field labor and overall project costs.
Finally, Vericor's turnkey solution provides customers with a single source for engineering, construction, installation, start-up and full maintenance programs. OnSitePower Solutions remove all the worry because you'll acquire a custom-tailored cogeneration facility ready to produce power and thermal energy.
Vericor handles all the upfront work including:
Complete engineering design, procurement and construction services.
All services necessary to bring the power plant on-line in a timely manner.
Assistance arranging financing.
Assistance with environmental and air permitting.