Analysis of diffuse irradiance from two parts of sky vault divided by solar meridian using portable spectral sky-scanner

作者：Komar Ladislav^*; Rusnak Anton; Dubnicka Roman

来源：Solar Energy, 2013, 96: 1-9.

DOI：10.1016/j.solener.2013.07.003

• Spectral sky measurements
• Diffuse solar radiation
• Sky scanner
• CIE sky standard

A self-constructed prototype of a portable sky scanner with calibrated spectroradiometer was used for scanning of the sky vault. Methodology widely used in daylight in combination with the spectral measurements in a broader range of the electromagnetic spectrum can improve calculations of incoming diffuse radiation usable in various electricity saving systems like light-transporting devices, building-integrated systems and with some limitations also PV panels. Determining sky radiance gradation and scattering indicatrix function based on CIE standard are applicable to some extent for computations of the immediate diffuse irradiance on the arbitrary inclined surfaces. Various sky conditions were considered with emphasis on different cloud coverage. Disadvantages of CIE sky standard and its applicability in partly cloudy conditions are discussed.

• 出版日期2013-10