| Sumario: | The first objective of this paper is to evaluate the solar flux in Cedar City, Utah, by conducting radiation heat transfer experiments with aluminum and steel sheets. Results are then utilized to calculate the thermal absorptivity of the two metals. The thermal absorptivities are compared with published values. The solar flux values calculated using the aluminum and steel sheets are within 4.23% and 4.48% of the values reported by a solar field approximately 10 miles west of the Southern Utah University Engineering Building. From these solar flux values, the thermal absorptivity of each material was determined using explicit numerical methods in MATLAB. The calculated absorptivity of each material fell within the published values.
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