Numerical simulations and design of solar chimney power plant adopting the fan model was presented in this study. A mathematical model describing fluid flow and heat transfer has been set up for the three regions of solar chimney power plant: collector, chimney and turbine. The Spanish prototype was chosen as an example for numerical simulation that incorporates turbine model, simulation during turbine operation and no load conditions were compared. For this purpose a simulation of 3D solar chimney power plant system with the standard k-ε turbulence model was developed, using CFD Ansys Fluent. Furthermore the effect of turbine operation and the influences of pressure drop across the turbine and solar radiation were investigated and the results revealed that the variation of solar radiation has an evident effect on the flow and heat transfer characteristics. Meanwhile the influence of turbine pressure drop on the collector efficiency was slight, while has a considerable effect on the power output.

提出了采用风机模型的太阳能烟囱发电厂的数值模拟和设计。已经建立了描述太阳能烟囱发电厂的三个区域（集热器，烟囱和涡轮机）的流体流动和传热的数学模型。选择了西班牙原型机作为数值模拟的示例，该模型结合了涡轮机模型，在涡轮机运行期间进行的模拟以及未比较任何负载条件的情况。为此，使用CFD Ansys Fluent开发了具有标准k-ε湍流模型的3D太阳烟囱发电厂系统仿真。此外，研究了涡轮机运行的影响以及涡轮机两端压降和太阳辐射的影响，结果表明，太阳辐射的变化对流动和传热特性具有明显的影响。同时，涡轮压降对收集器效率的影响很小，而对功率输出却有相当大的影响。