The impact of urban geometry on outdoor thermal comfort in a hot-humid climate

Elraouf, Reem Abd; elmokadem, ashraf; Megahed, Naglaa A.; Eleinen, Osama Abo; Eltarabily, Sara

doi:10.1016/j.buildenv.2022.109632

Cited by 46 publications

(6 citation statements)

References 43 publications

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“…However, we demonstrated that the aspect ratio and openness of a space can affect thermal comfort, making it difficult to change these indicators in an actual retrofit. Trees have a more pronounced effect on the thermal environment [34], especially in the summer, when they can reduce the radiant heat in the environment through shading and enhance the thermal comfort of the environment. There was a lack of trees at both sites.…”

Section: Renewal Of Spaces From a Microclimate Perspective To Improve...mentioning

confidence: 99%

Impact of Microclimate on Perception and Physical Activities in Public Spaces of New Urban Areas in Beijing, China

Han,

Fang,

et al. 2024

Buildings

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The development of new urban areas in Beijing has alleviated overcrowding in old urban centers and has ample public spaces for recreational activities. However, these public spaces are not ideally designed and have not been as successful as expected. Few studies have investigated the ineffective use of these public spaces in terms of microclimatic and thermal comfort factors. Our study investigated microclimatic factors, the subjective assessment of thermal comfort, the intensity of human activities, and the spatial features of public spaces in conjunction with surrounding buildings in a mixed commercial and residential complex in the Fangshan District, Beijing. We used a mixed-methods approach comprising microclimate measurements, questionnaires (n = 150), spatiotemporal behavior mapping, and field measurements. Our results showed that the human perception of the microclimate is related to the exposure duration and other microclimatic factors. The perception of people who spend longer periods outdoors is often inconsistent with objectively measured thermal comfort values. Activity intensity (low, medium, and high) was also related to the duration of time spent outdoors. Microclimatic factors affect the number of people at different activity intensities and the trajectory of the activities. Different spatial features cause different microclimate formations and can directly influence the human subjective assessment of thermal comfort. This study uniquely links the microclimate to human perceptions, physical activities, and spatial features in service of redesigning public spaces. We developed a comprehensive methodology that expands the post-occupancy evaluation and proposes new urban public space designs that consider microclimates. This study also provides a new perspective for promoting physical activity by enhancing the thermal comfort of the environment to achieve physical and mental health goals.

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Section: Renewal Of Spaces From a Microclimate Perspective To Improve...mentioning

confidence: 99%

Impact of Microclimate on Perception and Physical Activities in Public Spaces of New Urban Areas in Beijing, China

Han,

Fang,

et al. 2024

Buildings

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“…A., and Eltarabily, S. (2022). [46] Harbin China Three typical communities were explored, each with a distinct urban density and traffic layout. Three areas were chosen to symbolize the core area's shared roles and layout: the historic low-rise commercial pedestrian strip (the modern high-rise shopping center, and a medium-sized residential neighborhood).…”

Section: Alexandria and Aswan Egyptmentioning

confidence: 99%

A Systematic Review on Human Thermal Comfort and Methodologies for Evaluating Urban Morphology in Outdoor Spaces

Costa,

Wollmann,

Writzl

et al. 2024

Climate

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The exponential growth of urban populations and city infrastructure globally presents distinct patterns, impacting climate change forecasts and urban climates. This study conducts a systematic review of the literature focusing on human thermal comfort (HTC) in outdoor urban environments. The findings indicate a significant surge in studies exploring HTC in open urban spaces in recent decades. While historically centered on Northern Hemisphere cities, there is a recent shift, with discussions extending to various metropolitan contexts in the Southern Hemisphere. Commonly employed urban categorization systems include Sky View Factor (SVF), Height × Width (H/W) ratio, and the emerging Local Climate Zones (LCZs), facilitating the characterization of urban areas and their usage. Various thermal indices, like Physiological Equivalent Temperature (PET), Predicted Mean Vote (PMV), Universal Thermal Climate Index (UTCI), and Standard Effective Temperature (SET), are frequently utilized in evaluating external HTC in metropolitan areas. These indices have undergone validation in the literature, establishing their reliability and applicability.

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“…4,5 The development of a unique technology to improve the energy efficiency and conservation in buildings has been a key concern amongst governments and communities who aim to minimize energy consumption while maintaining thermal comfort in various weather conditions whether the buildings are new or historic. [6][7][8][9][10][11][12][13][14] Moreover, the COVID-19 pandemic's onset has raised the demand for new ways of constructing a more sustainable and safer built environment. 15 Thermal energy storage (TES) is one of the techniques that can help with energy efficiency and conservation.…”

Section: Introductionmentioning

confidence: 99%

A conceptual framework for phase change material integration in building components

Ismail

Megahed

Eltarabily

2023

Indoor and Built Environment

Self Cite

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With the recent dramatic growth of the building sector’s energy consumption to provide thermal comfort to consumers, the constraints of climate change and the scarcity of energy supplies have necessitated a wiser and more effective reduction in the amount consumed. As a result, phase change materials (PCMs) have attracted much interest as latent heat thermal storage systems in recent decades. This paper aims to explain the possibility of using PCMs in buildings by establishing an overall conceptual framework for the processes of selecting and integrating PCMs in building sector applications. Moreover, it leads to a comprehensive matrix that identifies the best and most common type of material for each building’s component, as well as its temperature and thickness properties, its thermal impact, and the most popular integration techniques. The findings show paraffin as the major used type in all building components, while salt hydrate is employed in facades. The most prevalent incorporating technique is macro-encapsulation, which prevails in most building components with its direct effect on cooling and heating applications.

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The impact of urban geometry on outdoor thermal comfort in a hot-humid climate

Cited by 46 publications

References 43 publications

Impact of Microclimate on Perception and Physical Activities in Public Spaces of New Urban Areas in Beijing, China

Impact of Microclimate on Perception and Physical Activities in Public Spaces of New Urban Areas in Beijing, China

A Systematic Review on Human Thermal Comfort and Methodologies for Evaluating Urban Morphology in Outdoor Spaces

A conceptual framework for phase change material integration in building components

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