Using the Inverse Method to Estimate the Solar Absorptivity and Emissivity of Wood Exposed to the Outdoor Environment

Wook Kang, Yong-Hun Lee, Chun-Won Kang, Hui-Lan Xu, Junji Matsumura
2011 Journal of the Faculty of Agriculture Kyushu University  
This study used the inverse method to investigate the solar absorptivity and emissivity of wood. The solar absorptivity and emissivity estimates were 0.396 (0.308~0.570) and 0.526 (0.307~0.772), respectively. They were highly dependent on the boundary conditions of convective heat transfer coefficients. Emissivity was much lower than that seen in most previous studies. Absorptivity was closely related to the L*a*b* color system, mainly to whiteness. It increased with increasing density because
more » ... ng density because lightness or whiteness has the highest correlation with density. There was a weak positive correlation between absorptivity and emissivity overall with R 2 =0.223.
doi:10.5109/19542 fatcat:k6hdub7q7rephi6polnchzk5fu