One-dimensional analysis of compressible flow in solar chimney power plants
One-dimensional analysis of compressible flow in solar chimney power plants
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DOI：
10.1016/j.solener.2016.06.051
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发表时间：
2016-10
期刊：
影响因子：
6.7
通讯作者：
A. Ćoćić;V. Djordjevic
中科院分区：
文献类型：
--
作者：
A. Ćoćić;V. Djordjevic
本文提出了一种计算太阳能烟囱电厂各组成部分（集热器入口、集热器、涡轮机、集热器-烟囱过渡段和烟囱）浮力气流的新理论方法。它包括使用一维流动模型。将集热器和烟囱内的流动视为可压缩，而将集热器入口、涡轮机和集热器到烟囱过渡段的流动视为不可压缩。描述集热器和烟囱内流动的微分方程以及描述工厂其他部分流动的代数方程同时求解。从而得到集热器和烟囱内的基本物理量的分布，如速度、温度、压力和密度。该模型在两个太阳能烟囱电厂进行了测试：著名的Manzanares电厂和Enviromission电厂。所得结果与文献中已知的Manzanares电厂的实测结果以及Enviromission电厂的涡轮功率和涡轮压降预测值吻合较好。此外，对模型方程进行了量纲分析，给出了质量流量、有效涡轮功率、烟囱高度等参数的计算结果。这些结果可以作为太阳能烟囱电厂性能的可靠预测。
A novel theoretical approach for the calculation of the buoyancy driven air flow in all constitutive parts (entrance to collector, collector, turbines, collector-to-chimney transition section and chimney) of a solar chimney power plant is presented in the paper. It consists in the use of one-dimensional model of flow. The flow in the collector and the chimney is considered as compressible, while the flow in entrance to collector, turbines and collector-to-chimney transition section is treated as incompressible. Differential equations that describe the flow in the collector and in the chimney, together with algebraic equations that describe the flow in other parts of the plant are simultaneously solved. As a result, distribution of basic physical quantities, like velocity, temperature, pressure and density, in the collector and the chimney are obtained. The model is tested on two solar chimney power plants: well known Manzanares plant and Enviromission plant. The obtained results are in good agreement with measured results from Manzanares plant known in literature, together with predicted values of turbine power and turbine pressure drop for Enviromission plant. In addition, dimensional analysis of the model equations is performed and the results for mass flow rate, available turbine power, chimney height, etc. are presented. These results can be used as reliable prediction of the performance of solar chimney power plants.