Thermal benefits of vertical greening in a high-density city: Case study of Hong Kong

Morakinyo, Tobi Eniolu; Lai, Anita; Lau, Kevin Ka-Lun; Ng, Edward

doi:10.1016/j.ufug.2017.11.010

Cited by 98 publications

(41 citation statements)

References 36 publications

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“…The effect of lowering the temperature depends on the geographical location and the season of year or time of day. In some places on Earth, western orientation will bring the most satisfactory results [ 214 ], and depending on the time of day it may be the eastern side [ 213 ]. Exposure to the sun is variable.…”

Section: Resultsmentioning

confidence: 99%

Statistical Review of Quality Parameters of Blue-Green Infrastructure Elements Important in Mitigating the Effect of the Urban Heat Island in the Temperate Climate (C) Zone

Antoszewski

Świerk

Krzyżaniak

2020

IJERPH

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Urban Heat Island (UHI) effect relates to the occurrence of a positive heat balance, compared to suburban and extra-urban areas in a high degree of urbanized cities. It is necessary to develop effective UHI prevention and mitigation strategies, one of which is blue-green infrastructure (BGI). Most research work comparing impact of BGI parameters on UHI mitigation is based on data measured in different climate zones. This makes the implication of nature-based solutions difficult in cities with different climate zones due to the differences in the vegetation time of plants. The aim of our research was to select the most statistically significant quality parameters of BGI elements in terms of preventing UHI. The normative four-step data delimitation procedure in systematic reviews related to UHI literature was used, and temperate climate (C) zone was determined as the UHI crisis area. As a result of delimitation, 173 publications qualified for literature review were obtained (488 rejected). We prepared a detailed literature data analysis and the CVA model—a canonical variation of Fisher’s linear discriminant analysis (LDA). Our research has indicated that the BGI object parameters are essential for UHI mitigation, which are the following: area of water objects and green areas, street greenery leaf size (LAI), green roofs hydration degree, and green walls location. Data obtained from the statistical analysis will be used to create the dynamic BGI modeling algorithm, which is the main goal of the series of articles in the future.

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Section: Resultsmentioning

confidence: 99%

Statistical Review of Quality Parameters of Blue-Green Infrastructure Elements Important in Mitigating the Effect of the Urban Heat Island in the Temperate Climate (C) Zone

Antoszewski

Świerk

Krzyżaniak

2020

IJERPH

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“…However, location, placement, and plant configuration determine their effectiveness in terms of surface and air temperature reduction and energy saving. Meanwhile, a recent study (Morakinyo et al 2017c) has shown how urban morphological characteristics relate to the heat mitigation potential of green wall interventions. In the study, facade greenery of varying façade coverage ratio was implemented in an idealized neighbourhood in Hong Kong with varying urban densities.…”

Section: Performance Of Urban Greenery In Mitigating Urban Heat Islanmentioning

confidence: 99%

“…As very high green facade coverage is unrealistic, implementation for outdoor heat mitigation is somewhat limited to highdensity urban settings with at least 30% average coverage. Even though nearness to pedestrians often ensures more benefits, innovative placement within a podium height of 20 m could augment for high coverage requisite (Morakinyo et al 2017c;. Nonetheless, it is important to mention that significant facade surface temperature reduction is realizable irrespective of urban density.…”

Section: Performance Of Urban Greenery In Mitigating Urban Heat Islanmentioning

confidence: 99%

“…Secondly, the contextualization of GBRTs and practical consideration in urban environments. Prior research has shown that the cooling effect of urban greenery is largely affected by building geometry (Morakinyo et al 2017a(Morakinyo et al , 2017b(Morakinyo et al , 2017c. To optimize thermal benefits, planting strategies should consider the co-existing effect of buildings and urban morphology (Tan et al 2017).…”

Section: Assessment Aspects Related To Mitigating Effect Of Vegetatiomentioning

confidence: 99%

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Progress in Urban Greenery Mitigation Science – Assessment Methodologies Advanced Technologies and Impact on Cities

Santamouris

Ban-Weiss

Osmond

et al. 2018

Journal of Civil Engineering and Management

Self Cite

134

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Urban greenery is a natural solution to cool cities and provide comfort, clean air and significant social, health and economic benefits. This paper aims to present the latest progress on the field of greenery urban mitigation techniques including aspects related to the theoretical and experimental assessment of the greenery cooling potential, the impact on urban vegetation on energy, health and comfort and the acquired knowledge on the best integration of the various types of greenery in the urban frame. Also to present the recent knowledge on the impact of climate change on the cooling performance of urban vegetation and investigate and analyse possible technological solutions to face the impact of high ambient temperatures.

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“…Many measures have been explored and applied to relieve the UHI [9], such as urban greening, ventilation corridors, and thermal insulation material. The area of the building envelope, particularly the facades, is much larger than that of the urban land surface, especially in high-density cities [10,11], which has a large impact on the thermal environment of cities and energy consumption of buildings [12]. Therefore, facade greening is a potential alternative measure for cooling the city and saving building energy consumption [13].…”

Section: Introductionmentioning

confidence: 99%

Cooling and Energy-Saving Performance of Different Green Wall Design: A Simulation Study of a Block

Zheng

Shen

et al. 2019

Energies

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To mitigate the urban heat island (UHI) and release the low carbon potential of green walls, we analyzed the cooling and energy-saving performance of different green wall designs. Envi-met was applied as the main simulation tool, and a pedestrian street named Yuhou Street was selected as the study object. Four designs of walls were summarized and simulated, demonstrating the living wall system (LWS). Super soil had superiority in cooling and energy saving. Outdoor air temperature, indoor air temperature, outside wall surface temperature, and inside wall surface temperature were analyzed. Apart from the outdoor air temperature, the other three temperatures were all significantly affected by the design of green walls. Finally, energy savings in building cavities were determined. The indoor energy saving ratio of the LWS based on super soil reached 19.92%, followed by the LWS based on boxes at 15.37%, and green facades wall at 6.29%. The indoor cooling powers on this typical day showed that the cooling power of the LWS based on super soil was 8267.32 W, followed by the LWS based on boxes at 6381.57 W, and green facades wall at 2610.08 W. The results revealed the difference in cooling and energy-saving performance of different green walls in this typical hot summer area.

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Thermal benefits of vertical greening in a high-density city: Case study of Hong Kong

Cited by 98 publications

References 36 publications

Statistical Review of Quality Parameters of Blue-Green Infrastructure Elements Important in Mitigating the Effect of the Urban Heat Island in the Temperate Climate (C) Zone

Statistical Review of Quality Parameters of Blue-Green Infrastructure Elements Important in Mitigating the Effect of the Urban Heat Island in the Temperate Climate (C) Zone

Progress in Urban Greenery Mitigation Science – Assessment Methodologies Advanced Technologies and Impact on Cities

Cooling and Energy-Saving Performance of Different Green Wall Design: A Simulation Study of a Block

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