Pan, L;
Wei, S;
Lai, PY;
Chu, LM;
(2020)
Effect of plant traits and substrate moisture on the thermal performance of different plant species in vertical greenery systems.
Building and Environment
, 175
, Article 106815. 10.1016/j.buildenv.2020.106815.
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Abstract
This study evaluated the effects of plant traits and substrate moisture on the thermal performance of four herbs and four shrubs, which are the most commonly used species in vertical greenery systems (VGSs), in humid subtropical Hong Kong over a one-year period. The canopy temperature reduction on sunny days was significantly correlated with canopy coverage and leaf area index (LAI), but not with daily evapotranspiration (ET). This indicated that the shading effect of VGSs, which is related to canopy coverage and LAI, was more prominent than ET cooling. The lack of significant correlation between substrate moisture, ET and canopy temperature indicated that substrate moisture and ET did not significantly enhance the canopy cooling of VGSs. Substrate moisture notably cooled the substrate on sunny days, and warmed the substrate on rainy days, which significantly affected substrate thermal behavior, but had less effect on canopy air temperature. The use of VGSs with eight common plant species on building envelopes reduced steady-state heat conduction by 18.7–39.8%, with Ficus elastica (rubber fig) causing the greatest canopy cooling.
| Type: | Article |
|---|---|
| Title: | Effect of plant traits and substrate moisture on the thermal performance of different plant species in vertical greenery systems |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.buildenv.2020.106815 |
| Publisher version: | https://doi.org/10.1016/j.buildenv.2020.106815 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions. |
| Keywords: | vertical greenery systems, plant characteristic, substrate moisture, thermal performance, cooling effect |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of the Built Environment UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of the Built Environment > The Bartlett Sch of Const and Proj Mgt |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10093967 |
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