ADVERTISEMENTS:
A simple gas turbine plant consists of the following:
1. Turbine.
2. A compressor mounted on the same shaft or coupled to the turbine.
ADVERTISEMENTS:
3. The combustor.
4. Auxiliaries such as starting device, auxiliary lubrication pump, fuel system, oil system and the duct system etc.
A modified plant may have in addition to above an intercooler, a regenerator, a re-heater etc.
The working fluid is compressed in a compressor which is generally rotary, multistage type. Heat energy is added to the compressed fluid in the chamber. This high energy fluid, at high temperature and pressure, then expands in the turbine unit thereby generating power.
ADVERTISEMENTS:
Part of the power generated is consumed in driving the generating compressor and accessories and the rest is utilised in electrical energy. The gas turbines work on open cycle, semi-closed cycle or closed cycle. In order to improve efficiency, compression and expansion of working fluid is carried out in multi-stages.