Effect of pavement materials on surface temperatures in tropical environment

Benrazavi, Rezvan Sadat; Dola, Kamariah; Ujang, Norsidah; Benrazavi, Nour Sadat

doi:10.1016/j.scs.2016.01.011

Cited by 55 publications

(18 citation statements)

References 38 publications

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“…Materials with high reflection rates cause a reduction in the environmental temperature and the various surfaces' temperature via convection [56]. Benrazavi et al [57] investigated the effect of various material types commonly used for floors on the surface temperature in equatorial climates. Some information regarding the materials causing higher reductions in the ambient temperature was provided therein.…”

Section: Albedomentioning

confidence: 99%

Optimal Thermal Characteristics of the Courtyard in the Hot and Arid Climate of Isfahan

2018

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The courtyard is a common and traditional architectural concept in Middle Eastern countries, especially Iran. This study presents practical solutions to arrive at the optimal form and features of a courtyard based on this traditional architecture to cope with the hot and arid climate of Isfahan, Iran. A model using the ENVI-met 3.1 software was used to simulate the courtyard orientation, the height of the wall enclosure, the albedo of the materials and the vegetation level in Isfahan. As the first step of the simulation, different orientations were simulated. Based on the results, the northern courtyard is recommended as the optimum orientation for the remainder of the simulation process. A high wall enclosure is recommended in the second step of simulation to ensure cool temperatures at noon and warmth at night. In the third step, it is advised to use low-albedo material in the courtyards to avoid the extra reflected radiation of used materials on the inhabitants. The final step suggests that more than 50% of the courtyard plan should be covered by greenery to ensure thermal comfort in the courtyards. Based on these suggestions, designers can create more sustainable courtyards that are better suited to the hot and arid climate of Isfahan.

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Section: Albedomentioning

confidence: 99%

Optimal Thermal Characteristics of the Courtyard in the Hot and Arid Climate of Isfahan

2018

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“…The increasing urbanization of the subtropics is producing expanding urban areas with high density and a growing number of tall buildings [1]. The reduction of natural scenery and the proliferation of human-made buildings and pavement are increasing the temperatures of urban environments [2] and the heat storage capacity of buildings and the ground [3], thereby magnifying the urban heat island effect. This effect is a unique phenomenon in terms of temperature distribution and distinguishes urban environments from rural ones in terms of temperature research [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Influence of Weather Factors on Thermal Comfort in Subtropical Urban Environments

2020

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Urbanization has influenced the distribution of heat in urban environments. The mutual influence between weather factors and urban forms created by dense buildings intensify human perception of the deteriorating thermal environment in subtropics. Past studies have used real-world measurements and theoretical simulations to understand the relationship between climate factors and the urban heat island effect. However, few studies have examined how weather factors and urban forms are connected to the thermal environment. To understand the influence of various weather factors on urban thermal environments in various urban forms, this study applied structural equation modeling to assumptions of linear relationships and used quantitative statistical analysis of weather data as well as structural conversion of this data to establish the structural relationships between variables. Our objective was to examine the relationships among urban forms, weather factors, and thermal comfort. Our results indicate that weather factors do indeed exert influence on thermal comfort in urban environments. In addition, the thermal comfort of urban thermal environments varies with location and building density. In hot and humid environments in the subtropics, humidity and wind speed have an even more profound impact on the thermal environment. Apparent temperature can be used to examine differences in thermal comfort and urban forms. This study also proved that an urban wind field can effectively mitigate the urban heat island effect. Ventilation driven by wind and thermal buoyancy can dissipate heat islands and take the heat away from urban areas.

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“…From a large-scale survey involving 1050 respondents, Wong et al identified that majority of the respondents reported respiratory problems (90.2%) followed by heat exhaustion (83.1%) and heat cramps (72.9%) as the health externalities of urban heat in KLMC [17]. Beside a substantial impact on the deterioration of urban quality and liveability, very little studies are dedicated on the UHI mitigation measures in the local context [18,19].…”

Section: Introductionmentioning

confidence: 99%

Spatial characteristics of open park spaces and perceived warmness in a tropical city

Hanif

Fong

Ramakreshnan

et al. 2020

Preprint

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Background: Rapid urbanization in Kuala Lumpur Metropolitan City (KLMC) has resulted in urban heat island (UHI) effect that deteriorated public health of the urban dwellers. In a motive of identifying the heat sources, this study reported the perceived warmness and the characteristics of Open Park Spaces (OPS) that induce the reported warmness of the surrounding environment in Kuala Lumpur Metropolitan City (KLMC), a tropical city of Malaysia.Methods: A cross sectional survey using structured questionnaires is conducted on randomly clustered respondents in selected localities of KLMC from January to May, 2018. Pearson correlation is performed to examine the relationship between perceived characteristics of OPS and perceived warmness of the surrounding environment according to three time slots of a day.Results: The outcomes demonstrated that respondents felt warm during nights (89%) compared to morning (75%) and afternoon (87%). Meanwhile, the existing OPS are reported to be equipped with a mix of biodiversity such as birds, rodents and insects (89%), a mix of natural plants and animal populations (88%), water bodies (88%), variety of plants (86%), well-maintained grass surfaces (80%), ornamental flowers (79%) as well as wooded pasture (78%) in their neighbourhood. As the maximum warming sensation is reported to be felt at nights, especially in the presence of water bodies (r= 0.318, p<0.01) and wooded pasture (r= 0.222, p<0.01) in the vicinity, the integration of heat ameliorators across the existing water bodies and wood pasture deemed essential to reduce the surrounding heat impacts.Conclusion: The findings of this preliminary investigation are useful for urban designers and policy makers to make tacit evidence-based decisions.

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Effect of pavement materials on surface temperatures in tropical environment

Cited by 55 publications

References 38 publications

Optimal Thermal Characteristics of the Courtyard in the Hot and Arid Climate of Isfahan

Optimal Thermal Characteristics of the Courtyard in the Hot and Arid Climate of Isfahan

Influence of Weather Factors on Thermal Comfort in Subtropical Urban Environments

Spatial characteristics of open park spaces and perceived warmness in a tropical city

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