The Numerical Simulation For Thermal Environment Under The Impact Of Anthropogenic Heat In Qingxi Town Of Shaoshan City

With the rapid development of urbanization,a lot of energy is consumed by a large number of urban population and the impact on the atmospheric environment caused by the heat caused can’t be ignored. Previously people just use some computer softwares to study the thermal environment within a centain region,however,this paper uses Gambit software to build simplified models for Shaoshan City based on theory of porous media models and urban thermal environment is simulated by the software Fluent. Better analysis and comparison of influence and its degree of different types of anthropogenic heat on thermal environment of winter and summer are accomplished,and different effects on the environment of anthropogenic heat in different seasons have been concluded.Anthropogenic heat is divided into human metabolism heat release,industry heat release, exhaust heat of life(air conditioner heat release)and transportation heat release, and its survey and anthropogenic heat intensity according to the reasonable calculation method are accomplished. Then thermal environment of Shaoshan City under all anthropogenic heat and without any anthropogenic heat,human metabolism heat,industrial exhaust heat,exhaust heat of life and transport heat are simulated by the Fluent software. Details are shown as followings :(1)The method suited for studying regional buildings in this paper is approached based on the basic theory of porous medium;and buildings area is simplified as the porous continuous fluid medium,which is theoretical basic of the porous medium is applied to the establishment of regional models of buildings.(2)Anthropogenic heat is divided into human metabolism heat,living heat,industrial heat and transportation heat,and their intensity are calculated. Thermal environments in winter and summer of Shaoshan city is simulated under different types of anthropogenic heat.The results show that different anthropogenic heat has different degree on the thermal environment of this region. In summer,under the condition of under no-air conditioning heat,without metabolism heat,industrial heat and transport heat,the average temperature is lower than 1.1 6℃、 0.34℃、0.28℃、0.27℃ respectively, which under all anthropogenic heat;and their degrees of effect on atmosphere temperature stick to ground are presented orderly as follows: air conditioner heat,human metabolism heat,industry heat and transportation heat.The corresponding values in winter are-0.6243℃,0.0002℃,0.0002℃,0.00004℃,it can be concluded that their effect degrees are presented orderly as follows:air conditioner heat, human metabolism heat, industry heat and transportation heat combining different temperature distribution area under different circumstances, and the air-conditioning has cooling effect on environment.(3)The analysis results show that the average temperature of Zaoyuan road under no traffic heat is almost as same as that under all human anthropogenic heat,and it is same for Shifu road,Shaoshan middle Road and Welcome Road. Obviously the transport heat mainly has influence on the environment near the road, and the degree of effect has a relationship with other anthropogenic heat intensity and location of the road. The results could provide reference for improving urban thermal environment and relieving the effect of anthropogenic heat due to populations of people.