The WARTSILA L20C2 auxiliary engine is a robust medium-speed diesel engine designed for heavy-duty, continuous-duty operation. During operation, friction and mechanical loads generate significant heat within the lubrication system.

A cargo vessel operating a WARTSILA L20C2 auxiliary engine experienced rising oil temperatures due to an aged, fouled oil cooler. Efficiency dropped, and the engine risked overheating during peak loads.

Solution

A new shell-and-tube lube oil cooler was engineered with:

CuNi 90/10 tube bundle

Reinforced tube sheets

Larger heat transfer area for tropical-climate operation

Improved baffle design for better oil flow distribution

Outcome

Oil temperature dropped from 83°C to a stable 68°C

Reduced engine vibration and smoother performance

Extended oil change intervals

Improved engine reliability and fuel efficiency

Conclusion

A dedicated lube oil cooler for the WARTSILA L20C2 auxiliary engine is crucial for ensuring dependable performance, extending engine life, and maintaining safe operating temperatures in demanding marine and industrial environments.