Abstract
Authors performed a field measurement on the thermal balances of two types of green-wall systems. To obtain a complete heat balance by estimating the convective component, a 'SAT meter' was invented and measured its accurate heat balance. The SAT meter is a mock-up consisting of a waterproof board with false leaves so as to measure a on-site convective heat transfer coefficient deduced from a precise thermal balance neglecting latent heat component. By applying the SAT meter, both turbulent sensible and latent heat fluxes of one of the green-wall systems were obtained. Consequently, following remarks have been reached. 1) The relationship between the wind speed and equivalent thermal conductance of the vegetation layer (mass of leaves) has a positive correlation. 2) The evaporation ratio of one of the green-wall systems is estimated to be from 0.1 up to 0.2. Observed data indicates that both daily and seasonal variations seem to be relatively negligible.
