Microclimate development in open urban spaces: The influence of form and materials

Chatzidimitriou, Angeliki; Yannas, Simos

doi:10.1016/j.enbuild.2015.08.048

Cited by 128 publications

(69 citation statements)

References 25 publications

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“…However, as the human body is non-selective in its absorption of solar energy, the effect of albedo modification on thermal sensation may actually increase thermal stress in warm environments [57]. Regarding this aspect, Chatzidimitriou and Yannas [58] verified that lower surface temperatures, by use of reflective materials, does not compensate for the higher amounts of reflected solar radiation released in the urban environment and directly effecting the thermal comfort of the pedestrian.…”

Section: Introductionmentioning

confidence: 99%

Assessment and Mitigation Strategies to Counteract Overheating in Urban Historical Areas in Rome

Laureti

Martinelli

Battisti

2018

Climate

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Abstract:As urban overheating is increasing, there is a strong public interest towards mitigation strategies to enhance comfortable urban spaces, for their role in supporting urban metabolism and social life. The study presents an assessment of the existing thermal comfort and usage of San Silvestro Square in Rome during the summer, and performs the simulation of cooling strategies scenarios, to understand their mitigation potential for renovation projects. The first stage concerns a field analysis of the thermal and radiative environment on the 1st and 2nd of August 2014, including meteorological measurements and unobtrusive observations, to understand how people experience and respond to extreme microclimate conditions. In the second stage, the research proposes scenario simulations on the same day to examine the influence of cool colored materials, trees and vegetative surfaces on thermal comfort. The thermal comfort assessment was based on Physiologically Equivalent Temperature (PET), whereas microclimatic simulations were conducted with CFD calculations (ENVImet v.4.3.1). The first stage shows a strong relationship between lower PET values and attendance rate, depending on daily shading patterns. The second stage shows a relevant improvement of thermal comfort, with PET values of −12 • C comparing to the no-intervention scenario, associated with a combination of cool materials and trees.

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Section: Introductionmentioning

confidence: 99%

Assessment and Mitigation Strategies to Counteract Overheating in Urban Historical Areas in Rome

Laureti

Martinelli

Battisti

2018

Climate

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“…The ability of trees as elements of microclimate controller depends on the shading performance of solar, longwave radiation and capability to produce latent heat [25,26]. The ability of grass and low vegetation as elements of microclimate controller depends on the condition of groundwater because of the influence of the water surface more dominant than grass and low vegetation surface [8].…”

Section: Open Spacementioning

confidence: 99%

“…The change of surface albedo, emissivity, infrared emissivity and evapotranspiration will affect the thermal environmental quality and microclimate [5]. Thermal environmental quality and microclimate an area are formed due to urban geometry [6,7,8,9], construction materials [8] and urban texture [10]. Urban geometry is element configuration of the area that affects thermal environmental quality in the form street geometry, orientation [11], street axes and building height [6], sky view factor, local and neighborhood scale [9].…”

Section: The Impact Of Urban Physical Development On Thermal Environmmentioning

confidence: 99%

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A Review of Thermal Environmental Quality in Residential Areas in Tropical Cities

Wienty

Triyadi

Wonorahardjo

2018

IOP Conf. Ser.: Earth Environ. Sci.

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“…Microclimatic variations within urban domains are found to affect metropolitan areas at local and global scales, with immediate effects on the health of people living in cities [1][2][3][4][5][6][7]. The extent of these impacts may vary considerably due to global urbanization, different structural morphologies, land cover, materials of the built environment, and the presence and density of industrial or commercial buildings [8][9][10][11][12][13][14][15][16][17][18][19][20][21]. Erell et al [13] discussed the positive consequences of anthropogenic heat flux on external temperature, specifically the consequential outdoor temperature rise during summer.…”

Section: Introductionmentioning

confidence: 99%

The Extent and Implications of the Microclimatic Conditions in the Urban Environment: A Vienna Case Study

2017

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Recent challenges in the realm of urban studies concern better understanding of microclimatic conditions. Changes in urban climate affect cities at local and global scales, with consequences for human health, thermal comfort, building energy use, and anthropogenic emissions. The extent of these impacts may vary due to different morphologies and materials of the built environment. The present contribution summarizes the results of a multi-year effort concerned with the extent and implications of urban heat in Vienna, Austria. For this purpose, high-resolution weather data across six locations are obtained and analyzed. This allowed for an objective assessment of urban-level climatic circumstances across distinct low-density and high-density typologies. Subsequently, a systematic framework was developed for identification of essential properties of the built environment (geometric and material-related) that are hypothesized to influence microclimate variation. Results point to a number of related (positive and negative) correlations with microclimatic tendencies. Additionally, the impact of this location-specific weather data on building performance simulation results is evaluated. The results suggest that buildings' thermal performance is significantly influenced by location-specific microclimatic conditions with variation of mean annual heating load across locations of up to 16.1 kWhm −2 ·a −1 . The use of location-independent weather data sources (e.g., standardized weather files) for building performance estimations can, thus, result in considerable errors.

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Microclimate development in open urban spaces: The influence of form and materials

Cited by 128 publications

References 25 publications

Assessment and Mitigation Strategies to Counteract Overheating in Urban Historical Areas in Rome

Assessment and Mitigation Strategies to Counteract Overheating in Urban Historical Areas in Rome

A Review of Thermal Environmental Quality in Residential Areas in Tropical Cities

The Extent and Implications of the Microclimatic Conditions in the Urban Environment: A Vienna Case Study

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