[Article] Evaluating Urban Heat Island Mitigation Strategies through Coupled UHI and Building Energy Modeling

Urban Heat Island (UHI) mitigation is often discussed through isolated interventions: more trees, cool roofs, reflective pavements, or green infrastructure. But cities do not operate as isolated objects. Buildings, streets, materials, vegetation, mobility systems, and atmospheric conditions continuously interact through coupled energy and climate processes.

That is why one of the most important questions today is no longer simply how to reduce urban temperatures, but how to accurately model the interaction between urban climate and building energy performance at multiple scales.

In our recent review, published in Building and Environment, we examine how coupled Urban Climate Models (UCMs) and Building Energy Models (BEMs) are transforming the way researchers evaluate UHI mitigation strategies and urban resilience.

📌 Citation Bahadori, E., Rezaei, F., He, B. J., Heiranipour, M., & Attia, S. (2025). Evaluating urban heat island mitigation strategies through coupled UHI and building energy modeling. Building and Environment, 280, 113111.

🌍 Why this matters: Most conventional building simulations still rely on standard meteorological datasets that fail to capture real urban microclimates. Yet urban overheating directly alters: • cooling demand • peak electricity loads • outdoor thermal comfort • heat stress exposure • indoor environmental quality • long-term urban resilience. The review shows that ignoring urban microclimate effects can significantly distort building energy predictions and underestimate climate risks in dense cities.

🔬 What this review contributes: The paper systematically reviews more than 100 scientific studies on coupled UHI and building energy modeling approaches.

We compare: ✔ Parametric urban climate models such as UWG, UrbClim, CIM, and CitySim ✔ Explicit microclimate models including ENVI-met, SOLENE-Microclimate, SOLWEIG, and Dragonfly ✔ Coupling strategies between urban climate simulation and building energy simulation ✔ The effectiveness of mitigation strategies across multiple climate zones

📊 Key findings

• Urban greenery consistently shows the strongest mitigation potential across climates.

• Coupled UHI-BEM simulations reveal substantial changes in cooling demand compared to conventional weather files.

• In some studies, urban microclimate effects increased annual cooling energy demand by up to 28.2%.

• Urban morphology, albedo, vegetation density, and street geometry strongly influence local thermal conditions.

• The accuracy of urban energy modeling depends heavily on detailed urban morphology and meteorological data.

🌆 A broader shift in urban research

This work reflects a larger transition happening in building science and urban sustainability research. Cities can no longer be studied only at the building scale. The future of climate-responsive urban design depends on coupling: 👉 urban climate 👉 energy systems 👉 morphology 👉 infrastructure 👉 mobility 👉 vegetation 👉 human thermal comfort. In other words, we must move from isolated building simulations toward integrated urban environmental modeling.

🤝 This work builds on international collaboration across architecture, urban climate science, and building performance research. Special thanks to the author team and collaborators from: 🏛️ Chongqing University 🏛️ Politecnico di Torino 🏛️ University of Liège – Sustainable Building Design Lab

📘 Full article: https://doi.org/10.1016/j.buildenv.2025.113111

📚 Learn more about our research https://www.sbd.uliege.be/

💻 Subscribe to my newsletter https://lnkd.in/diTVT5eq

🅱️ Bilibili b23.tv/bzjL3bn or 🎬 YouTube https://lnkd.in/erHrfkNf

🌐 Explore previous posts and resourceshttps://www.shadyattia.org

🔗 Follow all my professional links, including WeChat 🟩💬 微信https://lnkd.in/eN3xZhhZ

#UrbanHeatIsland #BuildingEnergy #UrbanClimate #SustainableCities #ClimateAdaptation #UrbanModeling #BuildingScience #EnergyModeling #ThermalComfort #Decarbonization #UrbanResilience