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Open AccessArticle

Validation of UWG and ENVI-Met Models in an Abu Dhabi District, Based on Site Measurements

1
Department of Architectural Engeneering, College of Engineering, UAE University, Al Ain 15551, UAE
2
Fraunhofer Institute for Building Physics IBP, Fraunhoferstr. 10, 83626 Valley, Germany
3
Department of Electrical Engineering and Computer Science, College of Engineering, Khalifa University, Masdar Institute Campus, Abu Dhabi 127788, UAE
4
Massachusetts Institute of Technology, Cambridge, MA 02139, USA
*
Author to whom correspondence should be addressed.
Sustainability 2019, 11(16), 4378; https://doi.org/10.3390/su11164378
Received: 18 June 2019 / Revised: 20 July 2019 / Accepted: 1 August 2019 / Published: 13 August 2019
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Abstract

The city of Abu Dhabi is growing every year in population, urban extent and energy demand. This research focuses on the application of two simulation programs to estimate changes in urban climate associated with continued development in Abu Dhabi: The Urban Weather Generator (UWG) and ENVI-met. Simulation with these two software packages are validated with the site data measured in downtown Abu Dhabi. A comparison analysis (in the different seasons) between the rural data, the simulation output, and the site measurements shows the variations of the UHI in this Middle Eastern city and the potential of the validated tools. The main aims of this study are: (a) to make a seasonal validation of the UWG for the city of Abu Dhabi (referring to urban-rural available data). The tool was previously validated for a year (no seasonal division) for Abu Dhabi, Toulouse, Basel, Singapore, Rome and Barcelona. The simulations are based on the 2016 version of the Urban Weather Generator. The analysis is separated into three main seasons (instead of the full year): winter, spring, summer. (b) To make a seasonal validation and improve the second tool evaluated in this study, ENVI-met 4.0. The software can simulate urban temperature, humidity and wind speed. Guides are proposed for the enhancement of the accuracy of both estimation procedures. Referring to the results, UWG tends to overestimate the canyon temperature during the summer and has a more realistic estimation on the winter season. ENVI-met has better estimations of temperatures during the summer season compared to UWG. Finally, the UWG weather file contributes a more detailed energy model on a mesoscale model. It considers the seasonal effect and shows the impact of the climate on profiling the UHI phenomena. ENVI-met needs improvement in calculating the anthropogenic heat and in calculation of the mean radiant temperature. View Full-Text
Keywords: microclimate; urban weather; UWG software; ENVI-met; site measurements; validation microclimate; urban weather; UWG software; ENVI-met; site measurements; validation
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Bande, L.; Afshari, A.; Al Masri, D.; Jha, M.; Norford, L.; Tsoupos, A.; Marpu, P.; Pasha, Y.; Armstrong, P. Validation of UWG and ENVI-Met Models in an Abu Dhabi District, Based on Site Measurements. Sustainability 2019, 11, 4378.

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