Exam Question
List the precautions in use of charge air cooler, with a sketch briefly explain the construction part of charge air cooler and on-board maintenance to maintain efficiency (16)
Class 4 (4th Engineer)
MEKM
📅 Jul 2022
Reference Answer
### Function of a Charge Air Cooler
The primary function of a charge air cooler (or intercooler) in a marine diesel engine is to reduce the temperature of the compressed air delivered by the turbocharger before it enters the engine's cylinders. This cooling process achieves the following:
* **Increased Air Density**: Cooling the air increases its density ($$\rho = \frac{P}{RT}$$). This allows a greater mass of oxygen to be packed into the same cylinder volume.
* **Improved Power Output**: A greater mass of oxygen enables more fuel to be burnt efficiently during combustion, resulting in a higher power output for a given engine size.
The primary function of a charge air cooler (or intercooler) in a marine diesel engine is to reduce the temperature of the compressed air delivered by the turbocharger before it enters the engine's cylinders. This cooling process achieves the following:
* **Increased Air Density**: Cooling the air increases its density ($$\rho = \frac{P}{RT}$$). This allows a greater mass of oxygen to be packed into the same cylinder volume.
* **Improved Power Output**: A greater mass of oxygen enables more fuel to be burnt efficiently during combustion, resulting in a higher power output for a given engine size.
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