High precision (1 part in 10) reflectivity measurement for the study of reflective materials used in solar collectors |
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| Authors: | Y T Chen B H Lim C S Lim K K Chong B K Tan |
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| Affiliation: | Institute of Energy and Environment, Malaysia University of Science and Technology, Kelana Square, No. 17, Jalan SS7/26, Kelana Jaya, 47301 Petaling Jaya, Selangor, Malaysia |
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| Abstract: | A new method of reflectivity measurement for the study of reflective materials in solar energy technology is reported in this paper. The method employs a fast rotating reference mirror and certain geometry configuration to alternatively deliver the light via a sample mirror or by passing it to a photo detector. It has been proved to reach a precision of 10−4. With a good repeatability of the method, outdoor exposure tests of sample mirrors have been carried out in a relatively short period (1 month) and significant specular reflectance losses due to an aging process have been observed. |
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| Keywords: | High precision reflectivity measurement Solar reflectors Weather aging Reflectance Solar reflective materials Durability test |
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