The theoretical maximum efficiency of a turbine, worked out in the early 20th century by Albert Betz, is 59.3%.Modern turbines get surprisingly close to that, being about 50% efficient.

• 20世纪AlbertBetz计算出涡轮的理论最大效率为59.；3%25，现代涡轮技术已经接近50%25，真是令人惊叹。