Research On Buildings Energy Transfer Theory And Experiment

Urbanization is a main index to measure a country’s modernization level. Having theworld’s most population, China’s economy and urbanization is in constant development,however, the rapid development also caused the deterioration of the environment. City isround of high-rise buildings and the changes of underlying surface such as cement makesregenerative ability strengthen, anthropogenic heat increase and atmospheric pollutionmakes the sky inverse radiation increase and water area decrease and a series of problemsmake people care more and more about the city thermal environment. Not only is thewhole city thermal environment, thermal environment of community is also veryimportant, such as buildings internal wind speed dead band and temperature differencesdirectly led to the deterioration of air quality and residents living environment, therebybring adverse effects on human health. In addition, the deterioration of the environment isdirectly led to the increase of the air-conditioning and other refrigeration equipment usagerate, it will lead to vicious spiral of anthropogenic heat increase, and increased the amountof building energy consumption. Therefore, the research on how to improve the people’sliving environment quality and reduce building energy demand, take the road ofsustainable development, is a growing concern. This paper focuses on the followingcontents:First of all, a comprehensive measurement was carried out in Yu Yuan District, theoutdoor microclimate characteristic in the summer was obtained, including the airtemperature, relative humidity, he wind speed and direction, the surface temperature ofunderlying and constructions. And the a comprehensive analysis of the thermal state of theenvironment with the above factors relationship was made.Secondly, the data from measurement were used as the boundary condition ofPHOENICS for the thermal environment simulation. The distribution characteristic of airtemperature field, the wind field and the pressure field was summed up. The difference ofthe calculated and measured values were compared and analyzed so as to determinewhether the approach was available.Thirdly, based on the data from measurement of1#and a south wall of14layers, the change rules was analyzed as long as the study of the indoor temperature change relativeto the external environmental temperature the time delay and intensity attenuationphenomenon, then the actual measured data was compared with the theoretical data andvalue the application of the wall combined with the summer climate in Wuhan city.Finally，a project of designing conditional system of thirty thousand square buildingsis done. By contrasting energy cost and equipment investment of5diverse systems, theanalysis of advantages、disadvantages and the fitness of the systems has been made, whichwill provide a reference for selection of air conditioning system.