| Sl. No | Steam Turbine | Gas Turbine |
| 1 | Uses high pressure steam as the working fluid | Uses air or some other gas as the working fluid. |
| 2 | It is a device consisting of only the turbine | Uses high-pressure steam as the working fluid |
| 3 | It is only a component (executes one step of the Rankine cycle) | It is a device consisting of a compressor, combustion chamber, and turbine |
| 4 | Delivers torque as the work output | Delivers torque or thrust as the work output |
| 5 | Efficiency is less | Efficiency is more |
| 6 | Low Operating Temperatures 5500C | High Operating Temperatures 15000C |
| 7 | More space is required (for installing boilers and heat exchangers which are connected externally for heat addition | Less Space required |
| 8 | Water (Steam) (working Fluid will not be available readily every where | It is an engine (that executes the whole Brayton cycle |
SEAFARERS GUIDE TO SEA