Technical Briefs

Operational Performance of the University of Minnesota 45 kWe High-Flux Solar Simulator

[+] Author and Article Information
Jane H. Davidson

e-mail: jhd@me.umn.edu
Department of Mechanical Engineering,
University of Minnesota,
Minneapolis, MN 55455

1Corresponding author.

Contributed by the Solar Energy Division of ASME for publication in the Journal of Solar Energy Engineering. Manuscript received September 17, 2012; final manuscript received January 16, 2013; published online July 2, 2013. Assoc. Editor: Akiba Segal.

J. Sol. Energy Eng 135(4), 044501 (Jul 02, 2013) (4 pages) Paper No: SOL-12-1236; doi: 10.1115/1.4023595 History: Received September 17, 2012; Revised January 16, 2013

The University of Minnesota's high flux simulator delivers radiative power of approximately 9.2 kW over a Ø60 mm circular area located in the focal plane, corresponding to an average flux of 3200 kW m−2, with a peak flux of 7300 kW m−2.

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Grahic Jump Location
Fig. 2

Spectral intensity of a xenon arc lamp output (heavy solid line) shown with the emission spectra of blackbodies at 3975 K and 6000 K (light solid lines) are plotted against the left ordinate. The spectral hemispherical absorptivity of a circular foil heat flux gauge coated with colloidal graphite (dashed line) is plotted against the right ordinate.

Grahic Jump Location
Fig. 1

Photograph and schematic of the seven lamp-reflector radiation units that comprise the University of Minnesota solar simulator: (a) photograph, (b) front view, and (c) cross-section in the center horizontal plane, including the Lambertian target and optics required for flux characterization. Schematic camera placement is not representative of its actual position.

Grahic Jump Location
Fig. 3

Measured performance of all seven radiation units in the focal plane: (a) flux distribution marked to show positions of 60 mm and 100 mm diameter circle in the target plane; (b) cumulative average flux versus target radius is shown on the left ordinate, while cumulative power is shown on the right ordinate




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