Class 1 (Chief Engineer) Engineering Management 📅 Apr 2022

Exam Question

(a) What are the engine developments & retrofitting which were adopted by engine manufacturers to enable hassle free slow steaming & ultra-slow steaming of ships?

(b) What are the latest innovations adopted by various engine manufacturer in the field of Main Engine Cylinder lubrication system? Elaborate on the additive technology used in the development of such oils.

Reference Answer

### (a) Engine Developments & Retrofitting for Slow Steaming
To enable efficient and reliable operation at reduced engine loads, known as slow steaming and ultra-slow steaming, engine manufacturers have introduced several key developments and retrofit options. These aim to optimize combustion, reduce fuel consumption, and maintain engine health during prolonged off-design operation.
**1. Turbocharger Cut-Out:**
* **Concept**: On engines equipped with multiple turbochargers (typically three or more), one or more turbochargers are mechanically disengaged during low-load operation (e.g., 20-60% MCR).

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