Analysis of Heat Balance of Isolated Tree and Its Effect on Surrounding Thermal Environment

Abstract

Numerical analysis of heat balance of isolated trees under hot environment was conducted taking into account the detailed leaf orientation distribution. The net radiation was estimated by Ross radiative transfer model and the latent heat transfer was estimated by Jarvis model. Leaf temperature was as the heat balance including sensible heat transfer is satisfied. Analysis is performed to camphor tree in sunny day of August in Osaka. It is resulted that latent heat transfer is predominant compared with sensible heat transfer in day time and sensible heat transfer in night is negative due to the radiative cooling. In comparing with case of randomly oriented foliage or case of zenith aligned foliage, there was no significant difference.