Paper Conference

Proceedings of Building Simulation 2017: 15th Conference of IBPSA

     

Estimating the Untapped Cooling Power of Green Walls as Evaporative Coolers for Buildings

Arta Yazdanseta1, Leslie Norford2
1Harvard Graduate School of Design, Harvard University, Cambridge, MA, USA
2Department of Architecture, Massachusetts Institute of Technology, Cambridge, MA, USA


DOI: https://doi.org/10.26868/25222708.2017.028
Abstract: Limited studies have been conducted on the impact of green walls on the energy performance of buildings. A majority of studies have focused on green walls as shading systems and few studies have considered the free cooling provided by green wall transpiration. In this study we have combined the εNTU and FAO-56 models to estimate the performance of vining green walls as evaporative coolers in six different climates. The proposed model provides a methodology to design and size the system as a function of canopy geometry, plant biophysical traits, and environmental variables. The results show that the plant biophysical traits and the design of the support structure of green walls are crucial factors in produced cooling power. The largest cooling power of 190 W/m2 and the lowest cooling power of 30 W/m2 were estimated for the hot and dry, and cool and dry climates, respectively.
Pages: 116 - 125
Paper:
BS2017_028