An instrument for measuring concentrated solar-radiation: a photo-sensor interfaced with an integrating sphere
✍ Scribed by A Ferriere; B Rivoire
- Publisher
- Elsevier Science
- Year
- 2002
- Tongue
- English
- Weight
- 229 KB
- Volume
- 72
- Category
- Article
- ISSN
- 0038-092X
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✦ Synopsis
The expression of the intensity of light reflected by the internal surface of an integrating sphere with an input power provided by a concentrated solar beam is established using a model of multiple reflection of photons. This intensity appears to be proportional to the input power, and thus makes viable the utilization of a photo-sensor interfaced with an integrating sphere to build a solar fluxmeter. The major parameters of the design of the fluxmeter are then identified, and an optimized design is proposed. An example of a practical instrument is given, and its performance is measured and discussed. The sensitivity of the fluxmeter to the spectral distribution of the solar radiation requires a careful calibration of the gauge in order to achieve a measurement error less than 65% of reading.