Paper Conference

Proceedings of eSim 2016: 9th Conference of IBPSA-Canada


Green roof retrofits: combined simulations to assess the outdoor microclimate benefits and the energy savings

Umberto Berardi

Abstract: This paper focuses on the benefits on the local microclimate and the building energy saving resulting from green roof retrofits. The research investigates a case study located in a university campus in Toronto, Canada. After having completed a detailed energy audit of the building, the benefits resulting from the installation of an extensive green roof were assessed. Firstly, a virtual microclimate model allowed to simulate the effects of the green roof over the outdoor microclimate. Then, the building energy model allowed used to compare the energy savings of different green roof design options. Results indicate that increasing the leaf area index would leads to an increased cooling effect up to 0.4˚C during the day at pedestrian level. The green roof retrofit resulted in a building energy demand reduction by 3%, and in significantly improved indoor comfort levels on the floor immediately below the green roof.
Pages: 355 - 362