Manuscrito
A critical review of heat and mass transfer in vegeted roof models used in building and urban energy models
Fecha
2018Institución
Resumen
Vegetated or green roofs are sustainable roofing systems that have become increasingly widespread worldwide in recent decades. However, their design requires accurate numerical modeling to fully realize the benefits of this technology at the building and larger scales. For this reason, several heat and mass transfer vegetated roof models have been developed over the last 35 years. This paper provides a critical review of more than 21 heat transfer vegetative roof models developed between 1982 and 2017 that have been used for building energy or urban modeling purposes. More than 55% of the vegetated roof models have been developed and validated using data from warm temperate climate zones. Four of the reviewed models have not been subjected to any simulation process. No model has been validated for semiarid conditions or cold climates or during cold winter conditions, and the most common variable reported for validation (in more than half of the models) is substrate surface temperature. Despite extensive studies of the impacts of vegetative roofs on building energy performance and urban temperature reduction, no studies have validated the model using whole-building energy data or at larger scales.