What is the function of the jacket water system in a marine diesel engine?

The jacket water system in a marine diesel engine plays a crucial role in maintaining the engine's temperature within optimal operating limits. It does this by circulating a coolant—typically a mixture of fresh water and antifreeze—around the engine's cylinder walls and other critical components. This process effectively absorbs excess heat generated during combustion and mechanical friction, preventing overheating and allowing the engine to function efficiently.

Maintaining optimal operating temperatures is vital for engine performance, longevity, and safety, as thermal stresses can lead to engine damage or inefficiency. By removing heat from engine components, the jacket water system ensures that the engine operates under ideal conditions, thus enhancing its performance and reliability over time.