西部人居环境学刊2025，Vol.40Issue(4)：45-50,6.DOI:10.13791/j.cnki.hsfwest.20241212003
干热地区城市商业街区夏季热舒适影响因素模拟研究
Simulation research on the influence factors of summer thermal comfort in urban commercial streets in dry and hot area:Taking Shihezi City as an example
摘要
Abstract
The outdoor high temperature and arid climate of dry and hot area are significant,and as the main place of urban economic development and citizens'social activities,improving the outdoor thermal comfort of commercial neighborhoods will directly affect citizens'satisfaction with commercial neighborhoods and the commercial value of the neighborhoods.In this study,a commercial block in Shihezi City,a dry and hot area,was selected as the research object,and the outdoor thermal environment of the block were measured and investigated in the summer,and numerical optimization simulation was carried out by using the ENVI-met software in terms of the block shading facilities,water landscape,green plant coverage,etc.,to generate the optimization scheme of the block's thermal comfort,so that the optimization scheme of the block's thermal comfort can provide a reference for the planning and transformation of the urban commercial street area in a hot and dry area and the improvement of the thermal comfort in the summer.The optimization scheme was generated in order to provide a reference for the planning and renovation of urban commercial streets in dry and hot area and the improvement of summer thermal comfort.Given the complex urban environment,commercial districts are often characterized by high building density and extensive hard surfacing,such as asphalt roads and concrete structures,which can lead to significant urban heat island effects.In dry and hot climates,these factors are further exacerbated by the lack of natural water bodies and limited vegetation cover.This study aims to address these challenges by providing practical and sustainable solutions for improving outdoor thermal comfort in such environments.To achieve this goal,the research employed a multi-method approach.Field investigations were conducted during peak summer conditions to collect extensive microclimate data,including air temperature,relative humidity,wind speed,and solar radiation intensity,at multiple locations throughout the commercial district.These measurements provided the foundation for detailed ENVI-met simulations that evaluated various environmental modification strategies.The Universal Thermal Climate Index(UTCI)served as the primary metric for assessing thermal comfort improvements.The study systematically examined three key intervention approaches:enhancement of vegetation coverage,implementation of shading structures,and integration of water features.The research revealed that vegetation plays a crucial role in moderating thermal conditions,with optimal benefits achieved through strategic placement of drought-resistant species that provide adequate shade while minimizing water requirements.Increasing vegetation coverage to approximately 35%-40%demonstrated significant cooling effects,particularly when concentrated in high-activity zones.Shading structures proved most effective when combining permanent architectural elements with adjustable components,allowing for flexibility in response to changing solar angles throughout the day.Water features,while providing valuable evaporative cooling,required careful design to balance their thermal benefits with water conservation needs in the arid environment.The study also identified critical periods when interventions would yield maximum benefits,particularly during early afternoon hours when thermal stress peaks.Spatial optimization models helped identify priority areas for intervention,with gateway plazas,seating areas,and main pedestrian corridors showing particularly strong responses to combined mitigation strategies.The practical implications of this research extend beyond immediate thermal comfort improvements.The proposed strategies demonstrate how careful environmental design can enhance the commercial viability and social functionality of urban spaces in challenging climates.By establishing quantitative relationships between design parameters and thermal comfort outcomes,the study provides a framework for evidence-based decision making in urban development projects.The integration of sustainability principles throughout the proposed solutions ensures that thermal comfort improvements align with broader environmental goals,particularly in water-scarce regions.This research contributes to the growing body of knowledge on climate-responsive urban design,offering specific,actionable strategies for creating more livable commercial spaces in dry-hot climates.Based on the extensive field measurements and advanced computational simulations,the study not only offers valuable guidance for urban planners and designers working in similar climatic conditions but also highlights the nonlinear relationships between intervention intensity and thermal improvement,suggesting optimal thresholds beyond which additional investments yield diminishing returns.Furthermore,this research underscores the importance of considering the interplay between different environmental factors and their cumulative impact on thermal comfort,which is essential for developing holistic and effective urban design strategies in dry and hot regions.关键词
干热地区/商业街区/室外热舒适/室外热环境/优化策略Key words
dry and hot regions/commercial block/outdoor thermal comfort/outdoor thermal environment/optimization strategies分类
建筑与水利引用本文复制引用
苏媛,彭甜甜,李嘉琪..干热地区城市商业街区夏季热舒适影响因素模拟研究[J].西部人居环境学刊,2025,40(4):45-50,6.基金项目
国家自然科学基金面上项目(52278093) （52278093）
