Solar thermal power plant with memory for a heat carrier medium and method for the operation of the solar-thermal power station in the discharge mode of the memory

摘要

The present invention relates to a solar thermal power plant with at least one heat transfer medium - memory for storing a heat transfer medium, is coupled into the solar energy, and at least one water vapor circulation loop for the generation of steam which is indicated by means of solar energy. In this case, the water vapor circulation loop at least one speisewasservorwärm - device for preheating of the feed water of the water steam circuit of the barrel and at least one water vapor circulation loop - bypass - line for bypassing the speisewasservorwärm - device. The water vapor circulation loop - bypass - line can, as a function of an operation - mode of the heat transfer medium - memory be activated, so that feed water through the water vapor circulation loop - bypass line - can flow. The operating mode of the heat transfer medium - memory is, in particular, a discharge mode (discharge operation) for the removal of heat transfer medium from the heat transfer medium - memory. In addition, a method for operating a solar power station with the following method step: activation of the water vapor - bypass - line as a function of the operation - mode of the heat transfer medium - memory, so that feed water through the water vapor circulation loop - bypass - line flows. With the aid of the water vapor circulation loop - bypass, in the discharge mode the memory storage water temperature is reduced. This increases the temperature difference between the heat source and heat sink and, as a result, the storage capacity of the heat transfer medium - memory.