Exam Question
(a) What is the significance of an air cooler and why is the scavenge air temperature preferred to be maintained at 40°C? (8)
(b) What are the probable indications of a leaky air cooler as fitted to a two stroke main engine? (8)
Class 4 (4th Engineer)
MEKM
📅 Jul 2024
Reference Answer
### (a) Significance of an Air Cooler and Preferred Scavenge Air Temperature of 40°C
The air cooler, often referred to as a charge air cooler or intercooler, is a critical component in the charge air system of a two-stroke main engine. Its primary function is to cool the hot, compressed air discharged from the turbocharger before it enters the engine's scavenge manifold.
**Significance of an Air Cooler:**
* **Increased Volumetric Efficiency and Power Output:**
The air cooler, often referred to as a charge air cooler or intercooler, is a critical component in the charge air system of a two-stroke main engine. Its primary function is to cool the hot, compressed air discharged from the turbocharger before it enters the engine's scavenge manifold.
**Significance of an Air Cooler:**
* **Increased Volumetric Efficiency and Power Output:**
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