Design And Calculation For The Thermal Equipments Of The Generating Subsystem Of Solar-thermal Power Station

With rapid development of our economy, electricity demand is increasing as well. The shortage of traditional energy and its shortcoming such as polluting the environment, make the great importance of the exploration of new energy resources to solve the energy crisis. Solar energy is abundant in China, and utilizing solar energy to generate electricity is one of main ways to using solar energy. It is very practical and important for us to enlarge the scale of using the solar thermal power technology, so as to decrease the demand of coal which is main resource using in our power plant, and promote the revolution of energy.This paper descripts each kind of solar thermal power technology, its principle and foreign application status and China's current research situation. The combination of parabolic trough concentrating solar power system and dish solar energy hot power generating system are introduced in this paper. As the two systems are similar to ordinary solar power plant according to parameters and equipments in the generating subsystem, its designation is based on the simplified solar thermal power plant.The research proposes the whole system of 1MW solar thermal power, and predicts its characteristics and processes in detail. Meanwhile, the economy of the system is analyzed, and the key equipments and basic parameters for power plant are determined through thermodynamic calculation.The study provides vertical straight-tube once-through steam generator, which is more suitable for solar power plant and through the structure calculation, thermodynamic calculation and hydraulic calculation for the steam generator, under the design parameters. The design for the condenser is the under the same way. They can both for the selection of equipments in the next step.The paper also introduces process of selecting devices in water treatment system of condensate treatment and water supply oxygen device, compared with each condensate process, the following process for the once-through steam generator is chosen: condensate→hydrogen pre-cation bed→mixed bed. For Water supply oxygen removal system, the method of deaerating with catalyst hydrogenation is promoted, which is more energy saving and meets the demands.