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Maritime Forum

TOPIC: Supercharging and Turbocharging

Supercharging and Turbocharging 24 Mar 2017 07:42 #4756

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(a) Explain the meaning of term Supercharging and state how it is achieved.

(b) Explain the meaning of term Turbocharging and state how it is achieved.

(c) How would you ascertain if the following components become fouled:
1. Charge Air Inter coolers
2. Air take suction filters
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Supercharging and Turbocharging 07 Jun 2017 23:31 #4841

a) Supercharging means, increasing the density of the air which is inhaled by the engine. This means more air is taken by the engine and thus more fuel can be burnt inside it, thus producing more power.

Supercharging can be achieved by putting a separate air compressor which could be electric motor driven or engine driven or it could be driven by any other primemover, which in most cases happen to be Turbine driven which runs by the kinetic energy of the Engine's exhaust gases and is called Turbocharger.

b) Turbo Charging means charging the compressed gas to the engine by an Exhaust gas turbine driven centrifugal compressor called Turbocharger.

c) 1.Fouling of the Air cooler:- Difference in the Temperature of cooling water inlet and outlet of the Air cooler, will reduce indicating the fouling of the Air-cooler.

2. Fouling of air intake filters This will indicated by the fouling of the differential pressure manometer fitted across the Air intake filters of the turbocharger.
It will also be indicated by decrease in the scavenge pressure at any particular RPM of the ME and increase in the Exhaust temperatures.
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