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A method to measure total atmospheric long-wave down-welling radiation using a low cost infrared thermometer tilted to the vertical

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  • Castro Aguilar, Jose L.
  • Gentle, Angus R.
  • Smith, Geoff B.
  • Chen, Dong

Abstract

Atmospheric long-wave down-welling radiation is a fundamental element of climate change and of input to thermal simulation. Measuring long-wave radiation is needed to calculate locally total energy flows to the earth's surface and night cooling rates in urban precincts. It is an important parameter for the weather files used by energy building simulation software to calculate the thermal performance of buildings and their energy efficiency. Currently, atmospheric down-welling radiation is usually measured by a pyrgeometer, for radiation beyond 3 μm. This is expensive and bulky. A simple methodology for measurement and calculation, with good accuracy, of average atmospheric long-wave down-welling radiation using a tilted, low-cost infrared thermometer is described. Tilt setting, comparison to data gathered by the pyrgeometer, and comparison of simulation studies with both data sets is described. A link of the magnitude of divergence between instant data pairs and radiant intensity is demonstrated and shown to depend on asymmetry in cloud density.

Suggested Citation

  • Castro Aguilar, Jose L. & Gentle, Angus R. & Smith, Geoff B. & Chen, Dong, 2015. "A method to measure total atmospheric long-wave down-welling radiation using a low cost infrared thermometer tilted to the vertical," Energy, Elsevier, vol. 81(C), pages 233-244.
    • Handle: RePEc:eee:energy:v:81:y:2015:i:c:p:233-244
    DOI: 10.1016/j.energy.2014.12.035
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    Cited by:

    1. Zhao, Bin & Hu, Mingke & Ao, Xianze & Huang, Xiaona & Ren, Xiao & Pei, Gang, 2019. "Conventional photovoltaic panel for nocturnal radiative cooling and preliminary performance analysis," Energy, Elsevier, vol. 175(C), pages 677-686.
    2. Zhang, Hulin & Xie, Yuhang & Li, Xiaomei & Huang, Zhenlong & Zhang, Shangjie & Su, Yuanjie & Wu, Bo & He, Long & Yang, Weiqing & Lin, Yuan, 2016. "Flexible pyroelectric generators for scavenging ambient thermal energy and as self-powered thermosensors," Energy, Elsevier, vol. 101(C), pages 202-210.
    3. Zhao, Bin & Hu, Mingke & Ao, Xianze & Chen, Nuo & Pei, Gang, 2019. "Radiative cooling: A review of fundamentals, materials, applications, and prospects," Applied Energy, Elsevier, vol. 236(C), pages 489-513.

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