Arabelle Steam Turbines ARABELLE 1700

The unique architecture of the Arabelle turbine results in the steam first expanding in a single flow high pressure (HP) path. Then, after moisture separation and reheat, it expands in a single-flow intermediate pressure (IP) section before going through the four, six, or eight low pressure (LP) flows. Arabelle improves on the previous generation LP exhaust design with fully independent LP cylinders. By connecting the LP inner casing to an end wall rather than the LP outer casing and ultimately the turbine table, the outer casing no longer needs to act as support. This simple but powerful design innovation greatly reduces turbine load on the foundation, caused by vacuum variations or condenser forces while improving the centering of both moving and stationary parts. The entire family of Arabelle turbine blades features a three-dimensional profile engineered with high aerodynamic performance in mind.