METHOD FOR OPERATING A SOLAR-HEATED WASTE HEAT STEAM GENERATOR, AND SOLAR-THERMAL WASTE HEAT STEAM GENERATOR

摘要

The invention relates to a method for operating a solar-heated waste heat steam generator (1) comprising a number of heating surfaces (2, 4), whereby a target value (formula (II)) for the supply water mass flow (formula (I)) is fed to a device for adjusting the supply water mass flow (formula (I)). The aim of the invention is to further improve the quality of a predictive supply water or mass flow control and to maintain the enthalpy of the flow medium at the evaporator outlet particularly stable especially when load changes occur. To this end, a characteristic correction factor (KT) is taken into consideration during production of the target value (formula (II)) for the supply water mass flow (formula (I)), by means of which thermal storage effects of stored or withdrawn thermal energy into one or several heating surfaces (2, 4) are corrected. The method is particularly suitable for operating a solar-thermal waste heat steam generator (1) in a solar tower power station (129) with indirect evaporation.