透平机组对立式太阳能热气流电站运行性能的影响

Effect of turbines on performance of solar chimney power plant with vertical collectors

在立式集热板太阳能热气流发电系统负载情况下,不考虑空气流经透平机组时的阻力损耗及系统的摩擦、泄漏等耗散时,推导了系统的理论输出功率,建立了适用于立式太阳能热气流电站系统的数学模型,采用数值计算的方法得出系统的压力、速度及温度分布云图;根据数值模拟计算结果,分析透平机组前后动能差及热能与机械能之间的转换关系,得出透平机组放置的最佳位置为立式集热板热气流电站系统的顶部靠近出口处。

Under loaded condition of a solar chimney power plant system with vertical collectors,the theoretical output power rate of the system was deduced, without considering the resistance loss of air flowing through the turbine unit and the friction and leakage of the system. The mathematical models that apply to the solar chimney power plant system were established and the distributions of pressure,velocity and temperature of the system were obtained by employing the numerical methods. According to the numerical simulation results,the kinetic energy difference before and after the turbine units and the transformational relationship between heat and mechanical energy were analyzed. It concluded that the best place to locate the turbine unit was the top of the solar chimney power plant with vertical collectors,where near the exit position.