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Dr. Henrich Vorkauf came up with the first design of a new natural circulation boiler which was then installed into a truck in the year 1944.
In a forced circulation boiler, an extra pump is used to increase the circulation rate as compared to that of a natural circulation boiler.
In a natural circulation boiler the circulation is achieved by the difference in density when the water in the boiler is heated.
It consist of two 300-MW units with Mitsui Babcock Energy designed natural circulation boilers and General Electric generators.
The circulation of water and the water steam mixture takes with the help of an external pump which supplies water at a higher pressure than in a natural circulation boiler.