Effects of a Green Space Layout on the Outdoor Thermal Environment at the Neighborhood Level

Bo-ot, L.Ma.; Wang, Yao Hong; Chiang, Che Ming; Lai, Chi Ming

doi:10.3390/en5103723

Cited by 16 publications

(8 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Two methodologies for vegetation modeling can be found. The first is to simulate vegetation into a solid block with a lower surface temperature [45]. This must assume that green vegetation has a lower leaf temperature than the ambient air [46], which might occur without direct solar radiation, and the main heat absorption process is conducted through heat convection as the temperature difference between leaf and air causes a significant heat transfer.…”

Section: Transpiration Heat Absorption and Water Releasementioning

confidence: 99%

The Effects of the Layouts of Vegetation and Wind Flow in an Apartment Housing Complex to Mitigate Outdoor Microclimate Air Temperature

2019

View full text Add to dashboard Cite

Previous studies have demonstrated that vegetation and increased air flow can mitigate air temperature by employing numerical models, satellite remote sensing or Computational Fluid Dynamics simulations. This study aimed to examine how layouts of vegetation space and wind flow affect microclimate air temperature, which directly affects city dwellers’ thermal comfort in summer, in a real apartment housing complex in Seoul, South Korea. To do this, a Reynolds-averaged Navier–Stokes model was utilized, combined with a finite volume method CFD simulation, and which measured transpirational cooling effects of vegetation by comprehensively considering air humidity by transpiration, as well as wind flow of the surroundings, to reflect actual conditions of urban environments. Based on the computational model, nine scenarios including elevated building designs were simulated. The findings of this study are as follows: First, different layouts of vegetation and wind flow clearly affected microclimate air temperature in the housing complex. Second, when the total area of vegetation was the same, it was more effective to reduce air temperature by placing it in small units rather than concentrating it in one place, and placing small vegetation spaces close to buildings was better than locating them between buildings. Third, it was apparent that an elevated space works as a wind path, leading to increasing wind velocity. However, it was revealed that wind flow does not always positively affect hot temperatures.

show abstract

Section: Transpiration Heat Absorption and Water Releasementioning

confidence: 99%

The Effects of the Layouts of Vegetation and Wind Flow in an Apartment Housing Complex to Mitigate Outdoor Microclimate Air Temperature

2019

View full text Add to dashboard Cite

show abstract

“…However, the nighttime temperature of the waterfront space will inevitably be higher in summer, which will enhance the UHI effect [31]. Meanwhile, with the refinement of computer numerical simulation, current research on influencing factors, such as greenery and urban form, is more in-depth [39][40][41]. Greenery is another promising strategy for mitigating thermal stress through the complementary mechanisms of shadowing, evapotranspiration, and air-movement shielding [42,43].…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Mechanisms of Summer Thermal Environment of Waterfront Space in China’s Cold Regions

2022

View full text Add to dashboard Cite

Water is an essential part of the urban ecosystem and plays a vital role in alleviating urban heat island (UHI) problems. The contribution toward UHI mitigation made by bodies of water needs to be ascertained to establish waterfront thermal environment construction standards. In this study, the thermal environment of the waterfront space of Tianjin in the cold regions of China was the research object. Through a survey including 141 valid questionnaires and the field measurement of four typical waterfront spaces in Tianjin, the thermal demand characteristics of recreational use for the waterfront environment and the influence of water on microclimate are discussed, supplemented by results from low-altitude infrared remote sensing technology, which was mainly used to obtain a wider range of infrared thermal images with higher accuracy. To improve the urban heat island effect and the quality of the ecological environment, this paper used outdoor thermal environment simulation software to quantitatively analyze the thermal environmental impact of outdoor public activity spaces around the representative urban body of water and proposes the optimization scheme of the waterfront space’s thermal environment. The results show that, based on the factors of water itself, the most economical water width was 70–80 m, and the cooling effect intensity of water had an essential correlation with the distance between the measured site and the water center. In terms of the environmental factors around the water, when the green lawn of the waterfront space was 12 m and the water shore’s geometric form was S-shaped, this could improve the cooling effect of water significantly. Waterfront activity spaces should focus on thermal comfort on the east and south water shores. It is expected that this study could provide practical implications and useful guidance for the planning and design of urban waterfront space in China’s cold regions.

show abstract

“…(i) innovative strategies for energy conservation coupled with indoor comfort improvement [4]; (ii) advanced procedures for envelope system optimization [5,6] toward zero energy buildings; (iii) elaboration of new high performing renewable energy plants, i.e., PV panels, to optimize the building-plant integrated system performance and environmental impact [7]; (iv) increasingly detailed tools for simulating the thermal-energy performance of buildings and their components with respect to specific climatological contexts [8]; (v) development of the building occupants' awareness and its effect in energy saving [9]; (vi) elaboration of environmental strategies spanning the single-building boundary, for energy optimization of urban inter-building networks at neighborhood level [10][11][12].…”

Section: Research Backgroundmentioning

confidence: 99%

A Building Energy Efficiency Optimization Method by Evaluating the Effective Thermal Zones Occupancy

2012

View full text Add to dashboard Cite

Abstract:Building energy efficiency is strongly linked to the operations and control systems, together with the integrated performance of passive and active systems. In new high quality buildings in particular, where these two latter aspects have been already implemented at the design stage, users' perspective, obtained through post-occupancy assessment, has to be considered to reduce whole energy requirement during service life. This research presents an innovative and low-cost methodology to reduce buildings' energy requirements through post-occupancy assessment and optimization of energy operations using effective users' attitudes and requirements as feedback. As a meaningful example, the proposed method is applied to a multipurpose building located in New York City, NY, USA, where real occupancy conditions are assessed. The effectiveness of the method is tested through dynamic simulations using a numerical model of the case study, calibrated through real monitoring data collected on the building. Results show that, for the chosen case study, the method provides optimized building energy operations which allow a reduction of primary energy requirements for HVAC, lighting, room-electricity, and auxiliary supply by about 21%. This paper shows that the proposed strategy represents an effective way to reduce buildings' energy waste, in particular in those complex and high-efficiency buildings that are not performing as well as expected during the concept-design-commissioning stage, in particular due to the lack of feedback after the building handover. OPEN ACCESSEnergies 2012, 5 5258 Keywords: building energy efficiency; dynamic simulation and validation; post-occupancy evaluation; equipment operations and management

show abstract

Effects of a Green Space Layout on the Outdoor Thermal Environment at the Neighborhood Level

Cited by 16 publications

References 10 publications

The Effects of the Layouts of Vegetation and Wind Flow in an Apartment Housing Complex to Mitigate Outdoor Microclimate Air Temperature

The Effects of the Layouts of Vegetation and Wind Flow in an Apartment Housing Complex to Mitigate Outdoor Microclimate Air Temperature

Assessment of the Mechanisms of Summer Thermal Environment of Waterfront Space in China’s Cold Regions

A Building Energy Efficiency Optimization Method by Evaluating the Effective Thermal Zones Occupancy

Contact Info

Product

Resources

About