Environmental pollution caused by burning fossil fuels, global warming, the greenhouse effect, and other factors has changed the approach of science to the use renewable energies. The main objective of this paper is to study the effects of diverse inputs (solar radiation) and collector geometries and also heat transfer of the solar chimney power plants (SCPP) model on the thermal and efficiency of the power plant. To achieve this purpose, an innovative setup of a solar chimney power plant is designed and a series of tests are performed. The setup is designed on a scale of 1/00 of an actual power plant. All tests are carried out in the indoor condition. Therefore, solar emission is simulated by heaters embedded in the floor of the collector. The new design of the collector of the present solar chimney power plants (SCPP) made it feasible for the user to change the canopy slope and the canopy height. It is shown that the canopy slope may influence the underneath airflow velocity and temperature and also changing the canopy geometry from divergent (inlet of the chimney) to convergent or collector-less form, decreases the amount of absorbed energy (usability) by the air inside the collector. In the present study, exergy of flow rate, Nusselt number, and Rayleigh number are calculated in three different geometries of solar chimney. It is shown that for the divergent geometry, increasing the input height improves the exergy value by 48% and 70%. On the other hand, average Nusselt value for divergent geometry is 193% and 780% higher than convergent and collector-less geometry respectively.

由燃烧化石燃料，全球变暖，温室效应和其他因素造成的环境污染已改变了使用可再生能源的科学方法。本文的主要目的是研究各种输入（太阳辐射）和收集器的几何形状以及太阳能烟囱发电厂（SCPP）模型对发电厂的热效率的影响。为了达到这个目的，设计了一种太阳能烟囱发电厂的创新装置，并进行了一系列测试。该设备的设计规模为实际发电厂的1/00。所有测试均在室内条件下进行。因此，可以通过嵌入集热器地板的加热器模拟太阳辐射。当前的太阳能烟囱发电厂（SCPP）的集热器的新设计使用户可以更改顶篷坡度和顶篷高度。结果表明，冠层坡度可能会影响下面的气流速度和温度，并且还会将冠层的几何形状从发散（烟囱入口）变为会聚或无集热形式，从而减少内部空气吸收的能量（可用性）收藏者。在本研究中，在三种不同的太阳烟囱几何形状中计算了流量，努塞尔数和瑞利数的火用。结果表明，对于发散的几何形状，增加输入高度可以将火用值提高48％和70％。另一方面，发散几何的平均Nusselt值分别比收敛和无收集器的几何分别高193％和780％。