拉伸变焦线性菲涅尔聚光器集热特性研究

Shen Liang, Xinglong Ma*, Qian He, Yi Tang, Hongfei Zheng

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

摘要

The linear Fresnel lens is expected to be widely used in solar concentration fields because of its high optical efficiency and lightweight. However, the focal length of a linear Fresnel lens will become shorter when light tilt incidence occurs, resulting in short daily working hours and low energy collection efficiency of the Fresnel lens, which hinders its large-scale applications. In this regard, this paper presents a linear Fresnel lens made of transparent elastic material, whose focal length can be adjusted by tensile deformation. During light tilt incidence, the shape of prisms of the Fresnel lens is changed by mechanical stretching to adjust the angle of refraction of light to compensate for the change in focal length. The mechanical and optical joint simulations are carried out to study the concentrating behavior of the linear Fresnel Lens during tensile deformation. An exemplary linear Fresnel lens with an aperture width of 200 mm and focal length of 360 mm was designed and experimental studied. The test results indicate that the method of tensile deformation causing zoom can effectively increase the daily working hours of the linear Fresnel lens by more than 2 h. Additionally, the all-day experimental results indicate that the effective daily working hours of the linear Fresnel lens is 6.5 h, during which the average heat collection efficiency exceeds 0.6.

投稿的翻译标题Study on Heat Collection Characteristics of Linear Fresnel Lens Solar Concentrator in Tensile Deformation Causing Zoom
源语言繁体中文
页(从-至)942-948
页数7
期刊Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics
45
4
出版状态已出版 - 4月 2024

关键词

  • focal length change
  • linear Fresnel lens
  • solar concentration
  • stretch zoom
  • tilt incidence

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