Long-Range Distributed Solar Irradiance Sensing Using Optical Fibers.

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ID: 95122
2020
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Abstract
Until recently, the amount of solar irradiance reaching the Earth surface was considered to be a steady value over the years. However, there is increasing observational evidence showing that this quantity undergoes substantial variations over time, which need to be addressed in different scenarios ranging from climate change to solar energy applications. With the growing interest in developing solar energy technology with enhanced efficiency and optimized management, the monitoring of solar irradiance at the ground level is now considered to be a fundamental input in the pursuit of that goal. Here, we propose the first fiber-based distributed sensor able of monitoring ground solar irradiance in real time, with meter scale spatial resolutions over distances of several tens of kilometers (up to 100 km). The technique is based on an optical fiber reflectometry technique (CP-ϕOTDR), which enables real time and long-range high-sensitivity bolometric measurements of solar radiance with a single optical fiber cable and a single interrogator unit. The method is explained and analyzed theoretically. A validation of the method is proposed using a solar simulator irradiating standard optical fibers, where we demonstrate the ability to detect and quantify solar irradiance with less than a 0.1 W/m resolution.
Reference Key
magalhes2020longrangesensors Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Magalhães, Regina;Costa, Luis;Martin-Lopez, Sonia;Gonzalez-Herraez, Miguel;Braña, Alejandro F;Martins, Hugo F;
Journal sensors
Year 2020
DOI
E908
URL
Keywords
solar energy distributed sensing optical fiber sensors optical radiation optical time domain reflectometry photothermal effects rayleigh scattering solar irradiance

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