The Heller–Forgó System, or Indirect Dry Cooling System
The system is named after Heller and Forgó László, the active collaborator in the industrial implementation of the system.
The Heller–Forgó system solved an important problem at power stations by utilizing cooling water more efficiently. The main point of their invention was to condense the vacuum steam using an injection of cool water. The still-warm water enters into the fine-gilled heat exchanger, cools down and becomes usable again for when the cycle is repeated. The system is known and used all over the world.