Evaluating thermal comfort conditions and health responses during an extremely hot summer in Athens

Pantavou, Katerina; Theoharatos, G.; Mavrakis, Anastasios; Santamouris, M.

doi:10.1016/j.buildenv.2010.07.026

Cited by 153 publications

(63 citation statements)

References 28 publications

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“…Adjoining the thermal indices already mentioned, and similarly to Fanger's model [64], Salata, Golasi, et al [81] proposed a logistic relationship between the observed percentages of dissatisfied and the mean thermal sensation votes on the ASHRAE 7-point scale in Mediterranean climates. Given the growing amount of research into the application of thermal assessment methods, there has likewise been a parallel attentiveness to the intrinsic correlations between the different indices themselves (e.g., [73,[82][83][84]). Additional indices were also discussed, particularly in Pantavou, Santamouris, et al [73], which presented an extensive comparative chart of existing indices, their respective formulae, and correlation coefficients.…”

Section: (No) Source Selected Study Outcomesmentioning

confidence: 99%

Approaches to Outdoor Thermal Comfort Thresholds through Public Space Design: A Review

et al. 2018

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Based on the Köppen Geiger (KG) classification system, this review article examines existing studies and projects that have endeavoured to address local outdoor thermal comfort thresholds through Public Space Design (PSD). The review is divided into two sequential stages, whereby (1) overall existing approaches to pedestrian thermal comfort thresholds are reviewed within both quantitative and qualitative spectrums; and (2) the different techniques and measures are reviewed and framed into four Measure Review Frameworks (MRFs), in which each type of PSD measure is presented alongside its respective local scale urban specificities/conditions and their resulting thermal attenuation outcomes. The result of this review article is the assessment of how current practices of PSD within three specific subcategories of the KG 'Temperate' group have addressed microclimatic aggravations such as elevated urban temperatures and Urban Heat Island (UHI) effects. Based upon a bottom-up approach, the interdisciplinary practice of PSD is hence approached as a means to address existing and future thermal risk factors within the urban public realm in an era of potential climate change.

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Section: (No) Source Selected Study Outcomesmentioning

confidence: 99%

Approaches to Outdoor Thermal Comfort Thresholds through Public Space Design: A Review

et al. 2018

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“…While a significant spatial and temporal variation is observed in the UHI intensity, many cities show a magnitude of 5-11 o C by mid-morning [4]. Elevated environmental temperatures in urban areas lead to rise of energy consumption for cooling [5][6][7][8], increase of peak electricity demand [9], degradation of air quality [10][11][12][13], and deterioration of thermal stress on residents [14,15]. In particular, UHI 6 temperature, if not negligible [21,53].…”

Section: Introductionmentioning

confidence: 99%

Environmental impacts of reflective materials: Is high albedo a ‘silver bullet’ for mitigating urban heat island?

Yang

Wang

Kaloush

2015

Renewable and Sustainable Energy Reviews

205

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Studies on urban heat island (UHI) have been more than a century after the phenomenon was first discovered in the early 1800s. UHI emerges as the source of many urban environmental problems and exacerbates the living environment in cities. Under the challenges of increasing urbanization and future climate changes, there is a pressing need for sustainable adaptation/mitigation strategies for UHI effects, one popular option being the use of reflective materials. While it is introduced as one effective method to reduce temperature and energy consumption in cities, its impacts on multi-dimensional environmental sustainability and large-scale non-local effect are inadequately explored. This paper provides a synthetic overview of potential environmental impacts of reflective materials at a variety of scales, ranging from energy load on a single building to regional hydroclimate. The review shows that mitigation potential of reflective materials depends on a portfolio of factors, including building characteristics, urban environment, meteorological and geographical conditions, to name a few.Precaution needs to be exercised by city planners and policy makers for large-scale deployment of reflective materials before their environmental impacts, especially on regional hydroclimates, are better understood. In general, it is recommended that optimal strategy for UHI needs to be determined on a city-by-city basis, rather than adopting a "one-solution-fits-all" strategy.

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“…Several studies found that the increased urban temperatures heavily impact the energy consumption of buildings during the summer period, affect human health [8], deteriorate indoor and outdoor thermal comfort [9,10], raise the concentration of harmful pollutants [11,12] and increase the carbon footprint of urban facilities and utilities [13].…”

Section: Introductionmentioning

confidence: 99%

Experimental Analysis of the Effect of Geometry and Façade Materials on Urban District’s Equivalent Albedo

et al. 2017

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Urban Heat Island (UHI) is influenced by urban form, geometry, and the properties of surfaces. Retroreflective (RR) materials have been proposed as a countermeasure to UHI, thanks to their optical property of reflecting most of the incident solar energy back towards the same direction. In this paper, the effect of RR materials on urban districts was investigated. They were applied on building façades of urban districts with different urban forms and orientations. To this aim, an experimental model resembling urban districts with different geometries was built and RR materials on vertical surfaces were tested and compared to conventional construction materials with similar global reflectance. The trend of the instantaneous albedo was monitored during the day and a new parameter called "equivalent albedo" was used to demonstrate the effectiveness of the RR materials. The comparative analysis shows that the RR façades lead to an increase of the equivalent albedo for all of the investigated urban patterns. For a block pattern, the equivalent albedo increase is equal to 3%, while for canyon patterns it is equal to 7%. Results of energy evaluations show that the energy savings obtainable with the use of RR materials is comparable to the values of anthropogenic heat emissions in residential areas.

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Evaluating thermal comfort conditions and health responses during an extremely hot summer in Athens

Cited by 153 publications

References 28 publications

Approaches to Outdoor Thermal Comfort Thresholds through Public Space Design: A Review

Approaches to Outdoor Thermal Comfort Thresholds through Public Space Design: A Review

Environmental impacts of reflective materials: Is high albedo a ‘silver bullet’ for mitigating urban heat island?

Experimental Analysis of the Effect of Geometry and Façade Materials on Urban District’s Equivalent Albedo

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