Cooling of high pressure air with ambient air as cooling medium

The problem

In a gas turbine the so called buffer air is compressed and heated in several steps. An engine working at excessively high gas temperatures can be subject to engine failure due to damaged lubrication or gaskets. For marine turbine applications titanium heat exchangers with salt water as cooling medium are normally used. This is not only expensive but also risky. A salt water leakage to the turbine can, in the worst case destroy the whole turbine.

The solution – AirCross with air as cooling medium eliminates the risk and costs less than a third

Ulstein Turbine / Rolls Royce, Marine Division was selected to deliver two turbines type G01-KF11 to the most spectacularly luxurious yacht ever built. Due to AirCross´s exceptionally large heat transfer surface Rolls Royce choose AirCross 21-80/C complete with housing and cooling fan. The buffer air in each turbine is cooled in one heat exchanger with ambient air. The two heat exchangers are working perfectly. Not only is the high performance, low cost and low weight appreciated, but also the simplicity.