Improving a pavement-watering method on the basis of pavement surface temperature measurements

Hendel, Martin; Colombert, Morgane; Diab, Youssef; Royon, Laurent

doi:10.1016/j.uclim.2014.11.002

Cited by 31 publications

(22 citation statements)

References 13 publications

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“…Temperatures obtained with this experimental setup compare favorably with other laboratory-scale experiments as well as field observations conducted on an asphalt road structure in Paris over the summer of 2013 under similar weather conditions [8], [17], [18], [37]. In the field, for a pavement area receiving only 4.5 hours of direct sunlight per day and daily maximum air temperature of 35°C, pavement temperatures reached up to 55°C at the surface and 45°C 5 cm deep.…”

Section: Discussionsupporting

confidence: 74%

“…Albedo values determined using equation (8) are summarized in Table 5 calculated during the last hour of the day phase during which &'( − R'( is constant for all samples (see Figure 9 and Figure 13). 8and spectral reflectivity measurements with the halogen spectrum in Table 3.…”

Section: Albedomentioning

confidence: 99%

“…Previous work by the authors has focused on the field study of pavement-watering as a climate change adaptation measure for Paris against increasing and intensifying heat waves. Field testing conducted every summer since 2013 has helped determine the cooling effects and water consumption of the method under heat-wave conditions [8]- [11]. These analyses have underlined the important role played by the materials being watered on cooling performance.…”

Section: Introductionmentioning

confidence: 99%

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Which pavement structures are best suited to limiting the UHI effect? A laboratory-scale study of Parisian pavement structures

Hendel

Parison

Grados

et al. 2018

Building and Environment

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Paving materials can negatively impact the urban climate, but knowledge of the thermal and climatic behavior of multilayer urban structures is lacking, particularly under heatwave conditions. To this aim, a laboratory-scale experiment was developed to characterize pavement samples under heatwave conditions. Surface albedo and evapotranspiration are confirmed as the dominant parameters for surface heating. The thermal properties of the underlying layers of pavement structures also impact their behavior and contribution to the urban climate. In particular, the combination of high effusivity and diffusivity of the granite sidewalk structure allow it to exhibit "cool" behavior during the day and "hot" behavior at night despite its relatively high albedo. A solar transmission index is proposed, including both the radiative and the thermal properties of a structure's constitutive layers, to rank structures by their ability to transmit absorbed radiation in depth. Future work with the developed experimental platform will aim to evaluate the performance and optimize the watering method of pavement-watering for different kinds of pavement structures. Keywords: urban heat island; urban paving materials; thermal properties; heat waves Vz downwards conductive heat flux at depth z [W/m²] Subscript/superscript α albedo [-] emissivity [-] n layer n ref/up reflected or upwards z depth [m]

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Section: Discussionsupporting

confidence: 74%

Section: Albedomentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Which pavement structures are best suited to limiting the UHI effect? A laboratory-scale study of Parisian pavement structures

Hendel

Parison

Grados

et al. 2018

Building and Environment

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“…[23]) reveal an average reduction during insolation of 13 C, from 50 C (323 K) to 37 C (310 K). These findings agree well with observations made by Kinouchi and Kanda [1] and Wei and He [6].…”

Section: Resultsmentioning

confidence: 99%

An analysis of pavement heat flux to optimize the water efficiency of a pavement-watering method

Hendel

Colombert

Diab

et al. 2015

Applied Thermal Engineering

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Preprint published in Applied Thermal EngineeringPavement-watering as a technique of cooling dense urban areas and reducing the urban heat island effect has been studied since the 1990's. The method is currently considered as a potential tool for and climate change adaptation against increasing heat wave intensity and frequency. However, although water consumption necessary to implement this technique is an important aspect for decision makers, optimization of possible watering methods has only rarely been conducted. We propose an analysis of pavement heat flux at a depth of 5 cm and solar irradiance measurements to attempt to optimize the watering period, cycle frequency and water consumption rate of a pavement-watering method applied in Paris over the summer of 2013. While fine-tuning of the frequency can be conducted on the basis of pavement heat flux observations, the watering rate requires a heat transfer analysis based on a relation established between pavement heat flux and solar irradiance during pavement insolation. From this, it was found that watering conducted during pavement insolation could be optimized to a frequency of every 30 minutes and water consumption could be reduced by more than 76% while reducing the cooling effect by less than 10%

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“…the temperatures in downtown areas are significantly higher than in the suburbs) and the problem is becoming increasingly serious [63,64]. Heat island brings adverse effects on the urban environment in various aspects, such as an increase of energy demand for cooling, which leads to more air pollutants and greenhouse gas emissions, lowered groundwater quality, and endangerment of urban biodiversity and human health [65,66].…”

Section: Engineering Applications and Challengesmentioning

confidence: 99%

A review of eco-friendly functional road materials

Jian

Huang

Sha

2018

Construction and Building Materials

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Extensive studies on traditional and novel engineering materials and the increasing 8 demands by growing traffic have led to tremendous changes of the function of roads. Roads, as an 9 important part of the human living environment, have evolved from structures that were designed and built for passing vehicles, to ecological assets with significant economic importance. In addition to structural stability and durability, functions such as noise reduction, urban heat island mitigation, de-icing and exhaust gas absorption, are also expected. This study focused on state-of-the-art research on the performance, applications and challenges of six environment-friendly functional road materials, namely the permeable asphalt concrete, noise-reducing pavement materials, low heat-absorbing pavement materials, exhaust gas-decomposing pavement materials, de-icing pavement materials, and energy harvesting pavement materials. With this study, we aim to provide references to the latest relevant literatures of the design and development of environment-friendly functional pavement, and promote innovation in materials science and pavement design principles. For this purpose, this review compiled extensive knowledge in modern road construction and related disciplines, in order to promote the development of modern pavement engineering technologies.

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Improving a pavement-watering method on the basis of pavement surface temperature measurements

Cited by 31 publications

References 13 publications

Which pavement structures are best suited to limiting the UHI effect? A laboratory-scale study of Parisian pavement structures

Which pavement structures are best suited to limiting the UHI effect? A laboratory-scale study of Parisian pavement structures

An analysis of pavement heat flux to optimize the water efficiency of a pavement-watering method

A review of eco-friendly functional road materials

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