A low cost, high flux, large area solar simulator has been designed, built and characterized for the purpose of studying optical melting
and light absorption behavior of molten salts. Seven 1500 W metal halide outdoor stadium lights are used as the light source to simulate
concentrating solar power (CSP) heliostat output. Metal halide bulbs and ballasts are far less costly per-watt than typical xenon arc lamp
solar simulator light sources. They provide a satisfactory match to natural sunlight; although ‘unfiltered’ metal halide lights have irradiance
peaks between 800 and 1000 nm representing an additional 5% of measured energy output as compared to terrestrial solar irradiance
over the same range. With the use of a secondary conical concentrator, output fluxes of approximately 60 kW/m2 (60 suns) peak
and 45 kW/m2 (45 suns) average are achieved across a 38 cm diameter output aperture. Unique to the design of this simulator, the tilt
angle and distance between the output aperture and the ground are adjustable to accommodate test receivers of varying geometry. Use of
off-the-shelf structural, lighting and electrical components keeps the fabrication cost below
A low cost, high flux, large area solar simulator has been designed, built and characterized for the purpose of studying optical meltingand light absorption behavior of molten salts. Seven 1500 W metal halide outdoor stadium lights are used as the light source to simulateconcentrating solar power (CSP) heliostat output. Metal halide bulbs and ballasts are far less costly per-watt than typical xenon arc lampsolar simulator light sources. They provide a satisfactory match to natural sunlight; although ‘unfiltered’ metal halide lights have irradiancepeaks between 800 and 1000 nm representing an additional 5% of measured energy output as compared to terrestrial solar irradianceover the same range. With the use of a secondary conical concentrator, output fluxes of approximately 60 kW/m2 (60 suns) peakand 45 kW/m2 (45 suns) average are achieved across a 38 cm diameter output aperture. Unique to the design of this simulator, the tiltangle and distance between the output aperture and the ground are adjustable to accommodate test receivers of varying geometry. Use ofoff-the-shelf structural, lighting and electrical components keeps the fabrication cost below
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