Abstract
Modeling thermal comfort provides quantitative evidence and parameters for effective and efficient urban planning, design, and building construction particularly in a dense and narrow inner city, which has become one of many concerns for sustainable urban development. This paper aims to develop geometric and mathematical models of wind and thermal comfort and use them to examine the impacts of six small-scale renewal strategies on the wind and thermal environment at pedestrian level in Dazhimen neighborhood, Wuhan, which is a typical case study of urban renewal project in a mega-city. The key parameters such as the solar radiation, natural convection, relative humidity, ambient crosswind have been incorporated into the mathematical models by using user-defined-function (UDF) method. Detailed temperature and velocity distributions under different strategies have been compared for the optimization of local renewal strategies. It is concluded that five rules generated from the simulation results can provide guidance for building demolition and reconstruction in a neighborhood and there is no need of large-scale demolition. Particularly, combining the local demolition and city virescence can both improve the air ventilation and decrease the temperature level in the study area.
Highlights
Urban renewal is defined as the process of slum or neighborhood clearance and physical redevelopment at a relatively large scale, considering other socio-economic and cultural elements [1].A neighborhood is a physical and social environment where people interact with each other and share a collective identity [2], sometimes called community
All these growing body of case studies indicate the importance of studying wind and thermal comfort environment related to urban microclimate in the areas of urban planning and design and building construction
The goal of this paper is to analyze the impacts of different renewal strategies on the wind and thermal environments at the level of local community, taking Dazhimen neighborhood in Wuhan inner city as a case study
Summary
Urban renewal is defined as the process of slum or neighborhood clearance and physical redevelopment at a relatively large scale, considering other socio-economic and cultural elements [1].A neighborhood is a physical and social environment where people interact with each other and share a collective identity [2], sometimes called community. Increasing the quality of housing and open spaces and reducing human health risks to community has become main concerns of sustainable urban renewal [3,4]. Personal factors are more concerned with people’s perception of thermal comfort in outdoor environment collected through surveys [22,23]. All these growing body of case studies indicate the importance of studying wind and thermal comfort environment related to urban microclimate in the areas of urban planning and design and building construction
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