Water turbine like a true turbine. Fausto Veranzio in his book "Machinae Novae" (1595) described a vertical axis mill with a rotor similar to that of a Francis turbine. Johann Segner developed a reactive water turbine (Segner wheel) in the mid-18th century in Kingdom of Hungary. It had a horizontal axis and was a precursor to modern water turbines. It is a very simple machine that is still produced today for use in small hydro sites. Segner worked with Euler on some of the early mathematical theories of turbine design. In the 18th century, a Dr. Robert Barker invented a similar reaction
Westinghouse Combustion Turbine Systems Division is typically adequate energy in the exhaust of the gas turbine to generate enough steam to produce about 50% of the gas turbine power, or, in this case, only 75MW. In this way, the original PACE plant design had built-in steam turbine capacity to enable the water/steam side of the plant to remain essentially the same as the gas turbine power rating evolved through to the 100MW-plus W501D5, when the rating of the plant was 300MW without supplemental firing. The PACE 260 was initially offered with a heat rate of about 8,100 Btu/kWh (42% efficiency) LHV on natural gas fuel.