The microclimate of a high-density city affects building energy consumption and thermal comfort. Despite the practical needs in building design and urban planning to predict conditions inside street canyons, literature is sparse for physics-based models that can support early stage design. Existing tools such as the Computational Fluid Dynamics (CFD) method is computationally expensive and cannot easily be coupled with other simulation models to account for solar heat gains at urban surfaces and anthropogenic heat from traffic and building HVAC systems. This paper describes a zonal model developed to assess airflow and air temperature in street canyons in high-density cities. The model takes into account 3D urban geometries, external wind, buoyancy, convective heat transfers from urban surfaces; it can simulate zonal air temperature, pressure, and airflow patterns by interactively solving mass, pressure and energy balance equations. The model was evaluated using field measurement on a 'mock-up' site consisted of movable concrete bins mimicking buildings and street canyons in high-density cities. Experiments were conducted on 3 alternative street layouts of various height-to-width aspect ratios: moderate (H/W = 1), dense (H/W = 2), and high-density (H/W = 3). Agreements between predicted and measured air temperatures were satisfactory across 3 layouts (RMSE < 0.0041). Temperature differences between simulated and measured results were largely within 1 K. The model can provide a reliable and quick assessment of the impact of street canyons on urban heat island (UHI) in high-density cities. The next step is to couple this model with building energy models.
Building and Environment – Elsevier
Published: Mar 15, 2018
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.
All for just $49/month
Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.
Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.
It’s easy to organize your research with our built-in tools.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera