Comparative study on solar absorpance of some coated surfaces [electronic resource].

Includes references.

The effective Absorbance of different surfaces to the total solar radiation flux incident depends mainly on its color. The surface color of buildings, greenhouses, mulchs and absorbing surfaces (solar collectors) affect the amount of absorbed total solar radiation. The surface requires high absorptance for solar radiation when heating is obliged and low Absorbance if heating is not required. To test the absorptance of some coated surfaces an experimental setup to measure the surface temperature is designed and installed at the Thermal laboratory, Mechanical power engineering department, Faculty of Engineering, Mansoura University. Some local paints are used for surface coatings such as blackboard, polish black, white, red, yellow and the natural color of Galvanized iron (G.I.) sheet (gray color). Results have shown graphically that, the plate painted with blackboard paint has the highest temperature and hence the highest absorptance for solar radiation.

Summary in Arabic.

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