Thermal stress reduction in cool roof membranes using phase change materials (PCM)
Pisello, Anna Laura
MetadataShow full item record
A considerable amount of energy is used in the building sector for air conditioning purposes. Additionally, the building sector contributes to the urban heat island (UHI) phenomenon which causes temperature rise in urban areas. Cool roof is an emerging passive cooling technology that can contribute
to reduce the cooling energy use in buildings and to mitigate the UHI effects in the urban area. Cool roofs and reflective coatings, despite of being effective in terms of reducing the cooling thermal loads in buildings and decrease the UHI, can suffer from extreme thermal stress which negatively influences their lifespan and performance. Thermal energy storage (TES) is a promising technology which can be applied together with cool roof technology to decrease the extreme thermal stress due to solar radiation as well as providing thermal inertia to the building. In this study, simulation-based optimization will be used to optimize the PCM melting temperature when integrated into a polyurethane-based cool roof membrane to reduce the thermal stress of the cool roof and also to improve the annual energy performance of the building. The optimization results showed that the application of PCM and cool roof technologies together can reduce the severe thermal stress of the cool roof membrane when the optimization objective is the annual thermal stress of the cool roof. On the other hand, when PCM melting temperature is optimized to reduce the annual energy needs, higher annual energy savings could be achieved with acceptable reductions in the cool roof membrane thermal stress.
Is part ofEnergy and Buildings, 2018, vol. 158, p. 1097-1105
The following license files are associated with this item:
Showing items related by title, author, creator and subject.
Cool Roof Impact on Building Energy Need: The Role of Thermal Insulation with Varying Climate Conditions Piselli, Cristina; Pisello, Anna Laura; Saffari Tabalvandani, Mohammad; Gracia Cuesta, Alvaro de; Cotana, Franco; Cabeza, Luisa F. (MDPI, 2019)Cool roof effectiveness in improving building thermal-energy performance is affected by different variables. In particular, roof insulation level and climate conditions are key parameters influencing cool roofs benefits ...
Optimization of coupled building roof solar reflectance and thermal insulation level for annual energy saving under different climate zones Piselli, Cristina; Pisello, Anna Laura; Gracia Cuesta, Alvaro de; Saffari Tabalvandani, Mohammad; Cotana, Franco; Cabeza, Luisa F. (International Solar Energy Society, 2017)The aim of this work is to assess building energy performance optimization potential of cool roof solutions in different climate conditions worldwide through dynamic thermal-energy simulation and optimization analysis. Moreover, ...
Energy savings due to the use of PCM for relocatable lightweight buildings passive heating and cooling in different weather conditions Marin, Paula; Saffari Tabalvandani, Mohammad; Gracia Cuesta, Alvaro de; Zhu, Xibingyan; Farid, Mohammed M.; Cabeza, Luisa F.; Ushak, Svetlana (Elsevier, 2016)Relocatable, transportable or off-site constructed lightweight buildings typically undergo sharp indoor temperature fluctuations in the heating and cooling seasons due to the lack of sufficient thermal mass in their ...