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One-dimensional heat and mass transfer model for Vertical Greenery Systems - VGheat1D

Hoffmann, Karin

FG Ă–kohydrologie & Landschaftsbewertung

Densely populated city quarters lacking green infrastructure increase the urban heat island effect and thermal discomfort outdoors and indoors. Façade greenings (FG) cool buildings and their surroundings through shading, insulation and transpiration, as demonstrated both experimentally and in simulations. FG also reduces the energy consumption for building cooling. Because of complex interrelationships, the performance of FG towards different buildings is not easy to assess. The presented numerical heat-mass transfer model is based on a validated model and transferred to the open source programming language R. It is used to calculate the temperatures on a transect through a Facade Greening and can be applied to describe the energy saving potential of a one-layered FG. Nine different wall compositions representing relevant building types in Berlin, Germany and Ljubljana, Slovenia are included in the data. The buildings represent several functions and a range of wall insulation levels. The introduced model can be used to predict cooling performances and to identify priority zones for FG implementation in cities.