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K. Kiesel, M. Vuckovic, A. Mahdavi:
"The scope and implications of the urban microclimate variance: a case study";
Talk: Clima 2016 - 12th REHVA World Congress, Aalborg, Denmark; 2016-05-22 - 2016-05-25; in: "Clima 2016 - proceedings of the 12th REHVA World Congress", P.K. Heiselberg et al. (ed.); REHVA, (8 Volumes) (2016), ISBN: 87-91606-26-8; Paper ID 339, 9 pages.

Recently, a number of research efforts have been initiated towards a better understanding of the
microclimatic variance in urban areas, due to factors such as urbanization, presence and density of industrial or commercial buildings, green areas, bodies of water, etc. Moreover, the
habitability of cities is subject to change especially with regard to climate change. Both of these aspects may have a decisive effect on the performance of buildings. In this context, the present contribution focuses on assessing the site-specific microclimatic conditions for a number of locations within the city of Vienna, Austria. The selected sites include both high-density urban areas and low-density suburban domains. The results point towards a considerable variance in urban microclimate in Vienna. Additionally, the impact of this location specific weather
information on building performance simulation results is evaluated. For this purpose, a number of buildings was selected and made subject to systematic thermal performance simulations using the above mentioned location specific weather information as boundary conditions. The computed performance indicators are then compared and analyzed across all locations. Moreover, the
results are also compared to performance indicators derived from simulations based on the standardized weather data commonly used for Vienna. Furthermore, this variance has important
ramifications for the simulation-based assessment of the energy performance of buildings. This is especially problematic when conducting simulations using standardized weather data due to the
major misestimations of the thermal performance of buildings.

(no german version available) Recently, a number of research efforts have been initiated towards a better understanding of the
microclimatic variance in urban areas, due to factors such as urbanization, presence and density of industrial or commercial buildings, green areas, bodies of water, etc. Moreover, the
habitability of cities is subject to change especially with regard to climate change. Both of these aspects may have a decisive effect on the performance of buildings. In this context, the present contribution focuses on assessing the site-specific microclimatic conditions for a number of locations within the city of Vienna, Austria. The selected sites include both high-density urban areas and low-density suburban domains. The results point towards a considerable variance in urban microclimate in Vienna. Additionally, the impact of this location specific weather
information on building performance simulation results is evaluated. For this purpose, a number of buildings was selected and made subject to systematic thermal performance simulations using the above mentioned location specific weather information as boundary conditions. The computed performance indicators are then compared and analyzed across all locations. Moreover, the
results are also compared to performance indicators derived from simulations based on the standardized weather data commonly used for Vienna. Furthermore, this variance has important
ramifications for the simulation-based assessment of the energy performance of buildings. This is especially problematic when conducting simulations using standardized weather data due to the
major misestimations of the thermal performance of buildings.

microclimate, weather data, building performance