MARK SYKES / SCIENCE PHOTO LIBRARY MARK SYKES / SCIENCE PHOTO LIBRARY
De Laval steam turbine. Diagram of a cross-section through the steam turbine invented by the Swedish engineer Gustaf de Laval (1845-1913). De Laval built his first steam turbine in 1887. Here, the steam drives a turbine (centre) which rotates to generate electricity. Various valves are seen that allow excess steam to escape from the system. Steam turbines use steam to directly turn the blades of a turbine, as opposed to driving pistons in a steam engine.
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