Evaluation of the optimal turbine pressure drop ratio for a solar chimney power plant
Evaluation of the optimal turbine pressure drop ratio for a solar chimney power plant
复制标题
太阳能烟囱发电厂最佳涡轮机压降比的评估
DOI：
10.1016/j.enconman.2015.10.076
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发表时间：
2016
影响因子：
10.4
通讯作者：
Wang Yuan
中科院分区：
文献类型：
--
作者：
Guo Penghua;Li Jingyin;Wang Yunfeng;Wang Yuan
采用解析法和三维数值模拟相结合的方法，对太阳能烟囱电站的最佳涡轮压降比进行了研究。结果表明，太阳辐射和环境温度对最佳涡轮压降比有明显的影响，SCPP系统性能的提高导致最佳涡轮压降比的提高。首次对相同面积的圆形集热器和方形集热器进行了不同形状集热器的性能比较。结果表明，幂定律假设也适用于正方形集热器的SCPP系统，正方形集热器与圆形集热器的OPT值相近。利用西班牙样机的模拟结果，得到了太阳辐射和环境温度变量的拟合方程，结果表明，在正常气候条件下，西班牙样机的fopt在0.90-0.94之间。本文提供了一种初步估算装置性能的方法，并为太阳能烟囱水轮机的最佳压降提供了参考数据。
The optimal turbine pressure drop ratiofoptfor a solar chimney power plant (SCPP) is investigated using an analytical approach and 3D numerical simulations. Results indicate that the solar radiation and ambient temperature have obvious influences to the optimal turbine pressure drop ratiofoptand an improved performance of the SCPP system leads to a highfopt. The performance comparison between the cases with different collector shapes, a circular collector and a square collector with the same area, is conducted for the first time. It is found that them-th power law assumption can also be applied to the SCPP system with a square collector; the values offoptfor the cases with a square collector are close to those for the cases with a circular collector. A fitting equation with variables of solar radiation and ambient temperature is obtained using the simulation results of the Spanish prototype; the results reveal that thefoptof the Spanish prototype ranges from 0.90 to 0.94 under normal climate conditions. This paper provides an approach to the preliminary estimation of plant performance, and reference data for an optimal pressure drop through solar chimney turbines.