[New Paper] Sensitivity analysis and weather condition effects on hygrothermal performance of green roof models

The root purpose of green roof technology invention is to delay the rainwater/runoff to prevent the overflow of the sewage system. The purpose of green roofs is to reduce cooling or improve thermal comfort. Therefore, this study conducted a sensitivity analysis and assessed the effects of long-term weather conditions on green roof models, including recycled and artificial materials. Different weather data scenarios for the 21st century were supposed and applied to the validated green roof models to measure its water retention capacity. The research aims to answer the following two questions:

✅ 1-What is the influence of using artificial and recycled materials on green roof performance under the temperate climate of Liege city till the end of the 21st century?

✅ 2-To what extent is green roofs’ thermal resistance sensitive to parameters of drainage and substrate layers, including artificial and recycled components?

To answer those questions, the hygrothermal performance of drainage and substrate layers, including different coarse artificial and recycled components, was assessed. Moreover, analytical methods were used to evaluate green roofs’ thermal resistance sensitivity to the configuration (thickness) and physical characteristics of drainage and substrate layers made with artificial and recycled components.

The entire parameter change demonstrated that the scatter of thermal conductivity, density, and thickness effectively influenced the water retention and dispersion of heat flux for the green roof layers. Also, the scatter of density was more effective in heat flux dispersion for the substrate layer than the drainage layer.

Citation: Kazemi, M., Rahif, R., Courard, L., & Attia, S. (2023). Sensitivity analysis and weather condition effects on hygrothermal performance of green roof models characterized by recycled and artificial materials’ properties. Building and Environment, 237, 110327.

📣 Read and share the 📄 article. The paper is available in Open Access format: https://lnkd.in/eCmq6wdU

This study was conducted under the leadership of Mostafa Kazemi and in collaboration with Ramin Rahif, Luc Courard and Shady Attia. This research was funded through the University of Liege and ARC grant for Concerted Research Actions, financed by the French Community of Belgium, Wallonia-Brussels Federation (CityRoof project: Analogous green roofs for urban ecosystem services (2020–2023).

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