MW级太阳能热气流电站传热和流动特性研究

基于Schlaich提出的太阳能热气流电站的概念以及集热棚的温室效应、烟囱抽力机制和蓄热层的蓄热原理，研究MW级太阳能热气流电站的性能特点．对集热棚、烟囱内空气的传热和流动过程进行理论分析和数值模拟，并分析了烟囱的抽力和系统做功能力，通过求取热气流的温度场、流场和压力场，分析了涡轮机负荷对烟囱抽力以及系统的做功能力的影响，最后，根据中国太阳能分布特点，分析了太阳能热气流电站发电技术在中国西北地区实施的前景，为太阳能热气流电站的设计和应用提供了理论依据。

Simulation of characteristic of heat transfer and flow for MW-graded solar chimney power plant

The concept of solar chimney power plant presented by Schlaich, the greenhouse effect of the collector, the principle of draft formed by the chimney and the principle of energy storage were considered to evaluate the characteristic of MW-graded solar chimney power plant. The process of heat transfer and flow in the collector and the chimney were studied by using numerical method. The draft caused by the temperature difference between the bottom of the chimney and the ambient and the power output of the system were discussed. Based on the numerical simulation for the distribution temperature, velocity and pressure in the solar chimney power plant, the influences of pressure drop across the turbine on the draft and the power output of the system were analyzed. The feasibility of building such a solar chimney power plant in the west of China was discussed, presenting a guidance to design a large-scale solar chimnev power plant