Thermal performance of curved-slope solar collector

Thermal performance of curved-slope solar collector
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曲面太阳能集热器的热性能

DOI:
10.1016/j.ijheatmasstransfer.2019.119295
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发表时间:
2020-04
影响因子:
5.2
通讯作者:
Zhou Xinping
Zhou Xinping
中科院分区:
工程技术2区
文献类型:
--
作者:
Zhou Xinping

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倾斜太阳能集热器(SSC)由于其温室效应和烟囱效应驱动上升气流,比水平太阳能集热器更有效。为了提高太阳能烟囱发电的性能,建议在自然山坡上建造大型太阳能烟囱。然而,天然山坡的表面往往不是平坦的,甚至不是直线上升的,而是弯曲的。本文以两段式太阳能集热器为研究对象,对两段式太阳能集热器的集热性能进行了研究,并与直线上升式太阳能集热器的集热性能进行了比较。结果表明,太阳能集热器达到最大年总辐射强度的最佳倾角略低于当地纬度,最大年总辐射强度远高于水平和垂直集热器。此外,从低点到高点,线性上升的斜坡(LRS)是最好的构建太阳能集热器相比,所有潜在的两段斜坡。此外,在潜在的两段斜坡中,两个更接近的斜坡角度的斜坡更好。结论适用于多段边坡和曲线边坡。本文为今后SSC的选址和设计奠定了坚实的基础。
Sloped solar collector (SSC) is more efficient than horizontal solar collector due to its greenhouse effect and chimney effect driving the updraft. Large-scale SSC is proposed to be constructed on natural mountain slope to enhance the performance of solar chimney power generation. However, the surfaces of the natural mountain slopes always are not flat or even linearly rising but curving. In this paper, the thermal performance of curved-slope solar collector is studied based on two-segment slopes and compared with that of the linearly-rising-slope SSC. Results show that the optimal slope angle (OSA) of an SSC for reaching the maximum annual total solar radiation (ATSR) intensity is a little lower than the local latitude, and the maximum ATSR intensity is far higher than those on horizontal and vertical solar collectors. Furthermore, from a low point to a high point, the linearly rising slope (LRS) is the best for constructing solar collector compared to all the potential two-segment slopes. Furthermore, among the potential two-segment slopes, the slope of two closer slope angles is better. The conclusions are suitable for multi-segment slopes and curved slopes. This paper lays a solid foundation for location selection and design of SSC in future.
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