Evaluation of Cooling Effects of High-Albedo Paints by Data Analysis and Numerical Simulation of Surface Heat Budget

Abstract

In order to evaluate surface-cooling effects of high-albedo paints, we analysed the surface heat budget of concrete blocks coated with high-albedo paints by observational data and numerical model. The analytic results based on observational data showed, for example, that the downward sensible heat flux from air to white-painted blocks appeared in the daytime. To validate these results, we developed a one-dimensional surface heat-budget and heat-conduction model. From the results of numerical simulations, characteristics of surface temperature and heat budget were well represented by the model.