High pressure feed

Under high pressure feed initiating under high is pressure stagnant water vapor into the turbine of the power plant understood.

Until 1928 the problem existed that conventional power plants had a very low level of efficiency (around 17%). 700 grams of hard coal had to be used for one kilowatt hour of electricity. That made the electricity too expensive. In the power plants customary at the time, the boiler had a pressure of 20 bar.

In 1928, however, Fritz Marguerre built the first system in Europe at the Mannheim power station , in which the steam was fed into the turbine at 100 bar pressure and the resulting temperature increase to 475 degrees Celsius .

This high-pressure feed led to a significant improvement in efficiency and a reduction in electricity generation costs of over 20%.

Today a kilowatt hour is generated with less than 300 grams.