This study aimed to quantitatively evaluate the effects of wall greening systems in mitigating the thermal environment by measuring the evapotranspiration systems from wall panels on which Eurnomymus fortunei was planted, and calculating the latent heat flux from the evapotranspiration measurements.
1) The wall greening panel reduced daily maximum surface temperature from 8.3℃ to 9.1℃ in daytime. from 1.1℃ to 4.2℃ in nighttime, compared to red brick wall surface temperature.
2) The evapotranspiration from the panels, which used coconut particles as the growing media, was about 6.0kg/㎡ (6.0mm), the transpiration from the plants was about 1.7kg/㎡(1.7mm), accounting for 29% Of the evapotranspiration.
3) The net radiation of greening panel was 5.11MJ/㎡(daily total), 315.0W/㎡(peak). The net radiation of red brick wall was 6.08MJ/㎡(daily total), 373.8W/㎡(peak).
4) The latent heat flux by the Eurnomymus fortunei transpiration was 4.22MJ/㎡(daily total), 304.0W/㎡ (peak). That was about 29%, 50% of the growth media value.
These results show that the latent heat consumption of evapotranspiration at greening system to prevent increase sensible heat and cooling load. As a result, it is confirmed that wall greening has the mitigating effects of heat island by evapotranspiration.