Effect of aging, thickness and color on both the radiative properties of polyethylene films and performance of the nocturnal cooling unit

摘要

This study presents the effects of the changing in color due to aging, thickness and the new color of polyethylene films on the radiative properties. Also, the influences of the radiative properties on the performance of the nocturnal cooling unit used to cool flowing water were studied. The measured data of the transmittance of the polyethylene films having a thickness of 50μm and having changes in its color by 5,30 and 100 days aging and also new film data were used to study its effects on the performance of the cooling unit theoretically.