Abstract:

Sola/coal hybrid power plant integrates solar energy and conventional coal-fired power plant to achieve the scale, industrial application of solar energy. The system reduces the investment of steam turbine and generator, which are necessary in traditional solar thermal power plants, so it has characteristics of lower cost and steady load. Solar energy can act as supplement energy to the thermal system of conventional coal-fired power plant, which can also avoid the unstable and unsafe operation of solar thermal power plant caused by frequently starting and stopping, by relying on the strong heat source of thermal system. Based on the analysis model of the established sola/coal hybrid demonstration power plant, the operation mode of solar field and thermal storage in the demonstration power plant were studied under typical climate and designed condition, as well as the flow distribution characteristics of regulating valve group were quantitatively analyzed, whose results could provide references for real operation rules and optimization in the future.

Key words: solar thermal power, sola/coal hybrid power plant, thermal storage, operation mode