Simulation and experimental study of an air tube-cavity solar receiver
Simulation and experimental study of an air tube-cavity solar receiver
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空气管腔太阳能接收器的仿真与实验研究
DOI：
10.1016/j.enconman.2015.07.013
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发表时间：
2015-10
影响因子：
10.4
通讯作者：
Kefa Cen
中科院分区：
文献类型：
--
作者：
Kunzan Qiu;Liang Yan;Mingjiang Ni;Cheng Wang;Gang Xiao;Zhongyang Luo;Kefa Cen
高温空气是一种潜在的热传递流体，可以将能量从集中式太阳能发电输送到燃气轮机。设计并制作了一种底部带有分光器的15圈螺旋管腔接收器。以5个7kW氙弧灯阵列系统为热源，对其性能进行了研究。8个K型热电偶从上到下等间隔放置。实验测得，当上向气流速度从1m~3/h增加到5m~3/h时，出口温度在593°C到546°C之间；当孔径上的平均流量约为120kW/m~2时，向下流动的出口温度在662°C到570°C之间。利用蒙特卡罗射线追踪法和电荷耦合器件(CCD)相机的Lambert测试法对腔体内壁的集中辐射能量分布进行了模拟和评价，得到了螺旋管各圈的实际通量分布。建立了一个完整的模拟模型，并通过实验验证了模型的正确性，其出口温度偏差在下行和上行分别为8.0%和2.5%以内。该模型对不同工况下的热流进行了详细的分析，并指出了提高效率、减少热损失的优化途径。模拟结果表明，在平均流量为300kW/m2的条件下，出口温度在5℃/h时可提高到800℃左右，热效率可从56℃左右提高到%左右；通过将内径从6 mm减小到4 mm，以增加约56 kpa的压降为代价，可以将热效率从56%左右提高到%左右。
High temperature air is a potential candidate as a heat transfer fluid to transport energy from concentrated solar power to gas turbines. A 15-turn helically coiled tube cavity receiver with an optical splitter at the bottom is designed and fabricated. Its performance is investigated with a five 7-kW Xe-arc lamps array system as heat source. Eight K-type thermocouples are placed from top to bottom with an equal interval. The outlet temperature experimentally ranges from 593 °C to 546 °C when the air flow rate increases from 1 m3/h to 5 m3/h for up-flows, while it ranges from 662 °C to 570 °C for down-flows, when the average flux on aperture is around 120 kW/m2. The Monte-Carlo ray-tracing method and the Lambert testing method with a charge-coupled device (CCD) camera are used to simulate and evaluate the concentrating radiation energy distribution on the cavity’s internal walls, and then the actual flux distribution of each turn of the helically coiled tube is obtained. A comprehensive simulation model is proposed and validated by the experimental results, where the outlet temperature deviations are within 8.0% and 2.5% for down and up-flows, respectively. The model provides a detailed analysis of heat flows at different conditions, and indicates optimization ways to improve the efficiency and reduce heat losses. The simulation results show that the outlet temperature can increase up to around 800 °C at 5 m3/h under an average flux of 300 kW/m2, and the thermal efficiency can be improved from around 56% to around 64% by decreasing the inner radius from 6 mm to 4 mm at the expense of increasing pressure drop of around 56 kPa.
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DOI：
10.1016/j.egypro.2014.03.031
发表时间：
2014
期刊：
Energy Procedia
影响因子：
--
作者：
F. Bai;Yunfan Zhang;Xue-Heng Zhang;Fushun Wang;Yupei Wang;Z. Wang
通讯作者：
F. Bai;Yunfan Zhang;Xue-Heng Zhang;Fushun Wang;Yupei Wang;Z. Wang
影响因子：
11.2
作者：
G. Xiao;Kaikai Guo;Zhong-yang Luo;M. Ni;Yanmei Zhang;Cheng Wang
通讯作者：
G. Xiao;Kaikai Guo;Zhong-yang Luo;M. Ni;Yanmei Zhang;Cheng Wang
DOI：
--
发表时间：
2008-03
期刊：
--
影响因子：
--
作者：
L. Amsbeck;R. Buck;P. Heller;Jens Jedamski;R. Uhlig
通讯作者：
L. Amsbeck;R. Buck;P. Heller;Jens Jedamski;R. Uhlig
DOI：
10.1016/j.egypro.2015.03.042
发表时间：
2015-05
期刊：
Energy Procedia
影响因子：
--
作者：
A. D. Río;Román Korzynietz;José Antonio Brioso;M. Gallas;I. Ordóñez;M. Quero;Clemente Diaz
通讯作者：
A. D. Río;Román Korzynietz;José Antonio Brioso;M. Gallas;I. Ordóñez;M. Quero;Clemente Diaz
影响因子：
10.4
作者：
Mario Biencinto;L. González;E. Zarza;L. Díez;Javier Muñoz-Antón
通讯作者：
Mario Biencinto;L. González;E. Zarza;L. Díez;Javier Muñoz-Antón