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write short notes on Power Turbine Generators
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The extremely slow steaming of ships has become the mainstream on the back of the recent energy-saving trend. Turbochargers
(superchargers) for marine diesel engines are driven only by exhaust gas energy.
Thus the industry has developed different turbo Systems for a large turbocharger for marine diesel engines and verified high energy saving
advantages in the low-load operating range of the engine.
a). Power Turbine Generators:
- It consists of an exhaust gas turbine installed in the exhaust gas bypass line on ME and a generator that converts power from turbine rotor
shaft into electricity onboard a ship.
- The increasing efficiency of Modern turbos means that there is a portion of unused exhaust gas energy available. The turbo-compound
system power turbine & generator (TCS-PTG) makes use of that excess exhaust gas energy.
- The power turbine is inserted into the exhaust gas system parallel to the Turbocharger. Here it drives an electric generator via a reduction
gearbox from the main engine power
- The TC performance and main engine output are not affected by the use pf PTG which can extract up to 5% of additional power from the ME
Exh Gas.
- Typically be larger as the power turbine unit typical is arranged several meters away from the ME in the E/R.
- The power turbine, its reduction gear and generator are placed on a common bedplate.
- The engine exhaust gas bypass valve will be closed at engine power lower than 40% MCR and the power turbine generator will be shut
down.
- Control v/v’s and fast-acting emergency valves for emergency shutdowns are installed in the exhaust system to ensure reliable, safe
operation
- Payback period is as short as 2-3 years
- this system leads to less funning hours of the DG hence saving in maintenance costs and reductions in emissionsLast edited by deepak; 12-20-2017, 12:41 PM. -
connector module is on rear of panel - so you cannot really glue them down (Renogy connector is on face of panel)Comment
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