Evaluating urban vegetation scenarios to mitigate urban heat island and reduce buildings' energy in dense built-up areas in Cairo

Aboelata, Amir; Sodoudi, Sahar

doi:10.1016/j.buildenv.2019.106407

Cited by 79 publications

(23 citation statements)

References 28 publications

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“…In order to guide farmers to choose the most appropriate transformation measures, it is necessary to simulate the effect for the transformation measures, including renovation of the roof, exterior walls, doors, and windows, and building the sunspace. According to this field research, a typical rural house was selected from the surveyed rural houses as the simulation object, and the temperature of the main room in winter and the heating energy consumption of the rural house were considered as the simulating indicators, and DesignBuilder, which is widely recognized computer simulation software, was applied for simulation [30,[34][35][36]. Specially, it firstly simulated the indoor temperature and energy consumption before the transformation, taken as the control group, and compared these simulating data with the measured data to verify the effectiveness of this model.…”

Section: Simulation Methods Of Temperature In the Main Room And Heatinmentioning

confidence: 99%

Indoor Temperature Improvement and Energy-Saving Renovations in Rural Houses of China’s Cold Region—A Case Study of Shandong Province

et al. 2020

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With the continuous implementation of a plan for reconstruction of “Beautiful Countryside” in China, the rural environment and appearance of rural houses have been significantly improved. However, those houses in cold areas of China have great trouble with indoor temperature and heating-related energy consumption. After investigating the current situation of the layout, building envelope, indoor temperature, and energy consumption of the rural houses renovated by the plan of “Beautiful Countryside” in Shandong Province, this paper puts forward the improvement measures of raising indoor temperature and reducing energy consumption. On this basis, a typical rural house was selected, and DesignBuilder was utilized to simulate the effects before and after the application of different renovation measures for this house. The results show that the main way to raise indoor temperature and reduce energy consumption is to improve the thermal insulation performance of the building envelope, including renovation of the roof, exterior walls, doors and windows, and attached sunspace. In addition, combined with the achievements of “Beautiful Countryside” reconstruction, this paper shall propose specific renovation practices which are suitable for different rural houses. Based on the level of economic development in rural areas, it also puts forward some feasible renovation paths for different rural areas, and further provides references for other areas to carry out relevant work in the future.

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Section: Simulation Methods Of Temperature In the Main Room And Heatinmentioning

confidence: 99%

Indoor Temperature Improvement and Energy-Saving Renovations in Rural Houses of China’s Cold Region—A Case Study of Shandong Province

et al. 2020

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“…A recent work of Abolelata and Sodoudi [75] aimed to reducing energy consumption by mitigating UHI in Cairo through different urban tree coverage scenarios. Comparing the baseline scenario and alternative scenarios (30% trees, 50% trees and 30% trees + 70% grass) revealed 3 K cooler thermal comfort for the 50% trees scenario, but none of the scenarios fulfilled reductions in buildings energy consumption, as the geometrical adjustments didn't took place; the street orientation, the aspect ratio and other geometry parameters play an crucial role and have to be considered.…”

Section: Uhi Mitigationmentioning

confidence: 99%

“…A further step using the same methodology is applied in the work of Ayad et al [111] to study the green and blue infrastructure effects on the energy efficiency in Alexandria in present and under climate change scenarios of the 5 th assessment report of IPCC [112] using the weather shift tool [113]. Eventually, Abolelata and Sodoudi [75,76] used the same methodology to mitigate UHI in Cairo using trees.…”

Section: Assessing Energy Efficiency Through Coupling Envi-met and Dementioning

confidence: 99%

A Review and Insights for Eleven Years of Urban Microclimate Research Towards a New Egyptian ERA of Low Carbon, Comfortable and Energy-Efficient Housing Typologies

et al. 2020

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Since the mid-1970s, urban development in Egypt has sprawled far from the distinguished compact arid built environment, as the court-yarded housing typologies that completed the vernacular picture of desert architecture have been discarded in the early 20th century. This has motivated urban microclimate research in Egypt. The main objective was initially to improve outdoor thermal comfort. Therefore, Egyptian research started with assessing different existing patterns for the sake of climate responsive and sustainable urban design practice characterized with low carbon, thermal comfort and energy efficiency in such a hot arid conditions. That is why the review workflow of this article has followed a design progress workflow that led to solving design complexities with regard to generating housing urban forms on a microclimate basis rather than an article regular review workflow in order to extract the research gaps and conclude insights. After discussing a general framework for generating housing sustainable design identified from the concluded gaps, the main conclusion is a vision and a call to integrate the Urban microclimate-Building passiveness-Renewables design dimensions, UBR, towards the evolution of a new era of energy efficient housing typologies and a 5th generation of Egyptian sustainable cities where the 1st generation of new Egyptian cities started 1970s.

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“…In general, vegetation works similar to a drag force in urban areas, adding pressure and viscous drag to the momentum equation [88][89][90][91]. In addition to deposition, the aerodynamic effect due to urban greenery must be applied in urban planning to minimize episodes of high levels of environmental contamination [92][93][94][95]. Trees serve as a sink for excess CO 2 in the atmosphere during photosynthesis and can sequester approximately 11 kg of carbon per year [96].…”

Section: Effect Of Water Bodiesmentioning

confidence: 99%

Energetics of Urban Canopies: A Meteorological Perspective

Marciotto

Morais

2021

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The urban climatology consists not only of the urban canopy temperature but also of wind regime and boundary layer evolution among other secondary variables. The energetic input and response of urbanized areas is rather different to rural or forest areas. In this paper, we outline the physical characteristics of the urban canopy that make its energy balance depart from that of vegetated areas and change local climatology. Among the several canopy characteristics, we focus on the aspect ratio h/d and its effects. The literature and methods of retrieving meteorological quantities in urban areas are reviewed and a number of physical analyzes from conceptual or numerical models are presented. In particular, the existence of a maximum value for the urban heat island intensity is discussed comprehensively. Changes in the local flow and boundary layer evolution due to urbanization are also discussed. The presence of vegetation and water bodies in urban areas are reviewed. The main conclusions are as follows: for increasing h/d, the urban heat island intensity is likely to attain a peak around h/d≈4 and decrease for h/d>4; the temperature at the pedestrian level follows similar behavior; the urban boundary layer grows slowly, which in combination with low wind, can worsen pollution dispersion.

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Evaluating urban vegetation scenarios to mitigate urban heat island and reduce buildings' energy in dense built-up areas in Cairo

Cited by 79 publications

References 28 publications

Indoor Temperature Improvement and Energy-Saving Renovations in Rural Houses of China’s Cold Region—A Case Study of Shandong Province

Indoor Temperature Improvement and Energy-Saving Renovations in Rural Houses of China’s Cold Region—A Case Study of Shandong Province

A Review and Insights for Eleven Years of Urban Microclimate Research Towards a New Egyptian ERA of Low Carbon, Comfortable and Energy-Efficient Housing Typologies

Energetics of Urban Canopies: A Meteorological Perspective

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