TY  - JOUR
A1  - Alsaad, Hayder
A1  - Hartmann, Maria
A1  - Voelker, Conrad
T1  - The effect of a living wall system designated for greywater treatment on the hygrothermal performance of the facade
JF  - Energy and Buildings
N2  - Besides their multiple known benefits regarding urban microclimate, living walls can be used as decentralized stand-alone systems to treat greywater locally at the buildings. While this offers numerous environmental advantages, it can have a considerable impact on the hygrothermal performance of the facade as such systems involve bringing large quantities of water onto 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 parameters at the living wall. Delphin, on the other hand, was used to conduct the hygrothermal simulations using the local parameters calculated by ENVI-Met. Four wall constructions were investigated in this study: an uninsulated brick wall, a precast concrete plate, a sandy limestone wall, and a double-shell wall. The results showed that the living wall improved the U-value, the exterior surface temperature, and the heat flux through the wall. Moreover, the living wall did not increase the risk of moisture in the wall during winter and eliminated the risk of condensation.
KW  - Feuchteleitung
KW  - Diffusionswärme
KW  - Heat transport
KW  - Moisture transport
KW  - Living wall
KW  - Delphin
KW  - ENVI-Met
Y1  - 2021
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20240116-65299
UR  - https://www.sciencedirect.com/science/article/pii/S0378778821009956
VL  - 2022
IS  - volume 255, article 111711
ER  - 
TY  - JOUR
A1  - Alsaad, Hayder
A1  - Hartmann, Maria
A1  - Völker, Conrad
T1  - Hygrothermal simulation data of a living wall system for decentralized greywater treatment
JF  - Data in Brief
N2  - This dataset presents the numerical analysis of the heat and moisture transport through a facade equipped with a living wall system designated for greywater treatment. While such greening systems provide many environmental benefits, they involve pumping large quantities of water onto the wall assembly, which can increase the risk of moisture in the wall as well as impaired energetic performance due to increased thermal conductivity with increased moisture content in the building materials. This dataset was acquired through numerical simulation using the coupling of two simulation tools, namely Envi-Met and Delphin. This coupling was used to include the complex role the plants play in shaping the near-wall environmental parameters in the hygrothermal simulations. Four different wall assemblies were investigated, each assembly was assessed twice: with and without the living wall. The presented data include the input and output parameters of the simulations, which were presented in the co-submitted article [1].
KW  - Kupplung
KW  - Feuchteleitung
KW  - Heat transport
KW  - Moisture transport
KW  - Living wall
KW  - Wärmeübertragung
KW  - coupling
KW  - ENVI-Met
KW  - Delphin
KW  - OA-Publikationsfonds2022
Y1  - 2022
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20220106-45483
UR  - https://www.sciencedirect.com/science/article/pii/S2352340921010167?via%3Dihub
VL  - 2022
IS  - volume 40, article 107741
PB  - Elsevier
CY  - Amsterdam
ER  -