Patent ID: 9518481
Filing Date: 2016-12-13
CPC Classification: F01K,F22B,F22D,Y02E,Y02P

Claim Text:
1. A method for operating a recirculating waste heat steam generator comprising, determining a specified desired value, managing the feedwater mass flow in a pressure stage of the recirculating waste heat steam generator on the basis of the specified desired value in order to control the water level in a drum, wherein the thermal power introduced into an evaporator of the pressure stage is used as an input variable in the determination of the desired value, wherein, in the determination of the thermal power introduced into the evaporator of the pressure stage, a flue gas mass flow and a difference in the specific enthalpy of the flue gas at an inlet and outlet of the evaporator of the pressure stage are used, and wherein, in the determination of the specific enthalpy of the flue gas at the outlet of the evaporator, a saturation temperature of the flow medium is used as an input variable.