Comparison between I.C. Engines and Gas Turbines
| | I.C. Engines | Gas Turbines |
1. | Ignition and lubrication systems is complicated as compared to gas turbines. | Ignition and lubrication systems is simpler as compared to IC. engines. |
2. | Weight per HP developed is greater. | Weight per HP developed is lesser. |
3. | Exhaust gas pollution is more. | Exhaust gas pollution is comparatively less polluting since excess air is used for combustion. |
4. | Thermal efficiency is higher compared to simple gas turbine. | Thermal efficiency is lesser than I.C. engine for simple turbine cycle. |
5. | Fuel cost comparatively costlier fuel required. | Fuel cost comparatively cheaper fuel can be used. |
6. | Work developed per kg of air is lesser. | Work developed per kg of air are more. |
7. | Mechanical efficiency is lower than gas turbine. | Mechanical efficiency is higher than I.C. engine. |
8. | It produces lesser exhaust gases. | It produces exhaust gases five times greater than IC. engines |
9. | Requirement of flywheel is a must. | Requirement of flywheel is not required. |
10. | IC. engine can’t be driven at higher speeds. | Gas turbine can be driven at higher speeds (40.000 rpm). |
11. | Starting is easier. | Starting is difficult. |
12. | Fuel control is comparatively easier. | Fuel control is comparatively difficult due to wide operating speeds. |
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