Paper Conference

Proceedings of Building Simulation 2021: 17th Conference of IBPSA


Heat and moisture transport through a living wall system designated for greywater treatment

Hayder Alsaad, Conrad Voelker
Bauhaus-University Weimar, Germany

Abstract: Living walls can be used as decentralized stand-alone systems to treat greywater locally at the buildings. While this offers multiple environmental advantages, it can have a considerable impact on the hygrothermal performance of the facade. As it is difficult to represent complex entities such as plants in the typical simulation tools used for heat and moisture transport, this study suggests a new approach to tackle this challenge by coupling two tools: ENVI-Met and Delphin. ENVI-Met was used to simulate the impact of the plants to determine the local environmental parameter at the living wall. Delphin, on the other hand, was used to conduct the hygrothermal simulations using the local parameters calculated by ENVI-Met. The results showed that the living wall improved the thermal envelope in both winter and summer, thus improving the building energy demand. Moreover, the living wall did not increase the risk of moisture in and on the surface of the wall.
Keywords: Hygrothermal simulations, Living wall, Coupling, ENVI-Met, Delphin
Pages: 1060 - 1067