Gas turbines with free-running power turbines are used primarily as drive systems for widely varying power requirements in power plants and on board ships, locomotives, and motor vehicles. The trainer investigates the behaviour during operation of a system with two independent turbines in a two-shaft arrangement. One turbine (the high-pressure turbine) drives the compressor and the other turbine (the power turbine) supplies the effective power. Changes in power output in the power turbine have no influence on the compressor, which is able to keep running at optimum speed at the best efficiency point. The trainer includes the following components: compressor, tubular combustion chamber and high-pressure turbine; fuel system; starter and ignition system; lubrication system; power turbine; generator; and measuring and control equipment.
Learning objectives-experiments
- Determining the shaft power
- Determining specific fuel consumption
- Recording the characteristics of the power turbine
- Determining the system efficiency
Features
- Simple model of a gas turbine
- Two-shaft arrangement with high-pressure turbine and power turbine
- Display and control panel with illustrative process schematic
- Propane gas as fuel
Specification
- Experiments relating to the function and behaviour during operating of a gas turbine in a two-shaft arrangement
- Operation with power turbine and generator
- Asynchronous motor with frequency converter as generator
- Start-up fan to start the high-pressure turbine
- Conversion of generated electrical energy into heat using four 600w braking resistors
- Effective silencing at intake and exhaust for laboratory operation
- Sensors record all relevant data visualised on displays in the process schematic
Technical data
- Gas generator (compressor and high-pressure turbine)
- Speed range: 60000…125000min-1
- Max. Pressure ratio: 1:2.0
- Max. Mass flow rate (air): 0,115kg/sec
- Max. Fuel consumption: 120g/min
- Power turbine
- Speed range: 10000…40000min-1
- Mechanical power: 0…1,5kw
- Electrical power: 0…1kw
- Sound level at 1m distance: max. 80db(a)
- Temperature exhaust gas: 700°c
- Measuring ranges
- Temperature: 5x 0…180°c / 2x 0…1200°c
- Speed: 0…199.999min-1
- Electric power: 0…1999w
- Air inlet velocity: 0…28m/s
- Fuel mass flow rate: 1,5…10,5kg/h
- Fuel supply pressure: 0…25bar
- Fuel nozzle pressure: 0…4bar
- Combustion chamber pressure loss: 0…20mbar
- High-pressure turbine inlet pressure: 0…2,5bar
- Power turbine inlet pressure: 0…250mbar
- 400v, 50hz, 3 phases
- 400v, 60hz, 3 phases
- 230v, 60hz, 3 phases
