Scale-model method for measuring noise reduction in residential buildings by vegetation

Jang, Hyung Suk; Kim, Ho Jun; Jeon, Jin Yong

doi:10.1016/j.buildenv.2014.12.020

Cited by 44 publications

(26 citation statements)

References 29 publications

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“…Many errors or uncertainty may exist and influence the experimental results by using the real trees, such as the different soil moisture level, leaf area humidity, plant evapotranspiration rate, plant albedo and emissivity, and shadow shape, area, and density that were mentioned in Park et al [51]. Third, although existing research has utilized both real and artificial grass in the scale model experiment [52,60,61], none of the research attempts to use artificial trees in the outdoor scale model experiment. This experiment will help to understand the importance of shading and retaining heat radiation from artificial trees in the hot dry desert environment.…”

Section: Experimental Site and Periodmentioning

confidence: 99%

Assessing the Cooling Benefits of Tree Shade by an Outdoor Urban Physical Scale Model at Tempe, AZ

Zhao¹,

Yang²,

Wang³

et al. 2018

Urban Science

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Urban green infrastructure, especially shade trees, offers benefits to the urban residential environment by mitigating direct incoming solar radiation on building facades, particularly in hot settings. Understanding the impact of different tree locations and arrangements around residential properties has the potential to maximize cooling and can ultimately guide urban planners, designers, and homeowners on how to create the most sustainable urban environment. This research measures the cooling effect of tree shade on building facades through an outdoor urban physical scale model. The physical scale model is a simulated neighborhood consisting of an array of concrete cubes to represent houses with identical artificial trees. We tested and compared 10 different tree densities, locations, and arrangement scenarios in the physical scale model. The experimental results show that a single tree located at the southeast of the building can provide up to 2.3 • C hourly cooling benefits to east facade of the building. A two-tree cluster arrangement provides more cooling benefits (up to 6.6 • C hourly cooling benefits to the central facade) when trees are located near the south and southeast sides of the building. The research results confirm the cooling benefits of tree shade and the importance of wisely designing tree locations and arrangements in the built environment.

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Section: Experimental Site and Periodmentioning

confidence: 99%

Assessing the Cooling Benefits of Tree Shade by an Outdoor Urban Physical Scale Model at Tempe, AZ

Zhao¹,

Yang²,

Wang³

et al. 2018

Urban Science

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“…Lee and Kang (2015) verified a measurement study (Picaut et al, 2005) with the ODEON simulation and found that the differences between simulation and measurement were less than 15% in both sound pressure level and RT30. In addition, more studies on sound propagation of streets were based on Odeon (Ismail and Oldham, 2005 ;Jang et al, 2015 ;Kim et al, 2014). Therefore, in this paper, the effects of street space on sound propagation were investigated based on ODEON simulations.…”

Section: Simulation Methodsmentioning

confidence: 99%

“…Onaga and Rindel (2007) examined the effect of the scattering coefficient on the sound propagation in urban streets with a 20 m width and three different heights. Jang et al (2015) assessed the noise reduction effects of vegetated faç ades using a 1:10 street canyon scale model with 10 m height and a 10 m width. Echevarria Sanchez et al (2016) found that the urban canyon shape had an important effect on the road traffic noise levels for directly exposed receivers with a 25.6 m height and a 25 m width.…”

Section: Introductionmentioning

confidence: 99%

Effects of urban street spatial parameters on sound propagation

Hupeng

Kang

Jiang

2017

Environment and Planning B: Urban Analytics and City Science

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Many studies have demonstrated that the effect of urban street spatial shape on sound propagation cannot be ignored. Most previous studies are based on idealised spatial models and but not systematically and comprehensively examine the real and complex street space. This paper takes the actual streets of a high-density city as research objects, select reliable spatial parameters, obtain the acoustic propagation data using computer simulation, identify the sound propagation characteristics, and establish sound propagation models of urban streets. In total, 144 samples have been tested, 13 spatial parameters, including the width information, height information, section information and plan information of streets, have been selected, and three acoustic indices, which include the sound attenuation, reverberation time (RT30) and early decay time (EDT), have been analysed in this paper. The sound propagation in the urban street is consistent with the propagation characteristics of the semi-free sound field, i.e., the sound attenuation is linearly correlated with the logarithm of the sound propagation distance. This linear correlation becomes more pronounced for the greater Plan enclosure degree and more even distribution of faç ades. The trend of sound attenuations decreases with the increasing Cross-sectional enclosure degree, increasing Plan enclosure degree in the Near Zone or decreasing Vehicle lane width. RT30 is primarily distributed between 1.0 s and 3.0 s and tends to be stable when the propagation distance increases. The mean RT30 increases with the increasing Mean faç ade height, Sidewalk width, Cross-sectional enclosure degree in the Near Zone or Standard deviation of Plan enclosure degree in the Near Zone. The typical EDT distribution curve is clearly divided into two areas along the propagation direction. In the first area, the EDT value is notably small and nearly equals zero. With a sudden increase, the EDT maintains at a relatively stable value in the second area (stable area) of 0 to 3.0 s. The mean EDT in the stable area increases with the increasing Vehicle lane width, increasing Cross-sectional enclosure degree or decreasing Standard deviation of Plan enclosure degree in the Near Zone.

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“…Previously, complete testing absorption coefficients of scale model materials were measured in a reverberation chamber [118]. A city street was scaled including those materials with equal absorption performance as real vegetation and buildings.…”

Section: Acoustics For Buildings Using Scale Modelsmentioning

confidence: 99%

“…However, the scope of acoustic scale models are wide spread to cases of scale models research on acoustics of simple rooms [85] or street acoustic analyses [202,116,151,118,216].…”

Section: Acoustics For Buildings Using Scale Modelsmentioning

confidence: 99%

A review on experimental research using scale models for buildings: Application and methodologies

Lirola

Castañeda

Lauret

et al. 2017

Energy and Buildings

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a b s t r a c tA complete review on scale model testing for buildings, considering a wide range of methodologies and new manufacturing techniques, in areas such as statics and dynamics, acoustics, lighting, aerodynamics and thermodynamics for energy efficiency is presented. On the one hand, scale model testing for buildings require different considerations and techniques and are usually focused on one specific physical field contributing to the information scattering. On the other hand, they are sometimes too general, theoretical or unpractical. Although commercial computer simulations are first option among professionals, they necessarily simplify complex phenomena and ignore, among other aspects, size effects and latest findings in fractals. The potential of complementary experiments using new manufactured scale models for buildings is raising, however, it is still missing a practical overview through different physical fields specifically for buildings with these considerations. This review gives a wide perspective and unified scope on uses and possibilities of scale model testing for buildings, from the traditional configurations of Leon Battiste Alberti to new possibilities applying complex physics and new techniques of 3D-modelling.

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Scale-model method for measuring noise reduction in residential buildings by vegetation

Cited by 44 publications

References 29 publications

Assessing the Cooling Benefits of Tree Shade by an Outdoor Urban Physical Scale Model at Tempe, AZ

Assessing the Cooling Benefits of Tree Shade by an Outdoor Urban Physical Scale Model at Tempe, AZ

Effects of urban street spatial parameters on sound propagation

A review on experimental research using scale models for buildings: Application and methodologies

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