Energy Consumption Characteristics And Conservation Strategies For High Education Buildings

University campus building energy consumption is high in China,especially the buildings in which air conditioning system uses the cold water bought from the district cooling system.Energy saving situation is grim and the related theory research is little.This paper takes a typical university in the Guangzhou Higher Education Mega Center for example and studies the energy consumption characteristics and conservation strategies.This paper analyzes the campus buildings’ electricity,cold water and total energy consumption per floor area data and gets the energy consumption level of each kind of energy.The author also calculates the energy consumption benchmark using inter quartiles rating and Cluster rating,according to buildings’ electricity,cold water and total energy consumption data.The boxplot,the Quartiles,the percentage distribution,the cumulative percentage distribution for electricity,cold water and total energy consumption are all derived.Comparison of two methods are done.The campus building are divided into the high,medium and low energy consumption building according to the benchmark.The energy consumption of large atrium building is the highest.Taking the large building with atrium as model,the author studies the appropriate atrium form and the effect of thermal performance parameters on atrium building energy consumption,including the correlation between average envelope window-wall ration,atrium skylight ration,average index of thermal inertia,average coefficient of heat transfer and cooling load of building and atrium.The influence of each factor is analyzed.The author also simulates and calculates the natural ventilation atrium.The effect of atrium skylight ration,window-wall ration,open window ration on natural ventilation are studied and the optimum proposals are given.Achieving low energy consumption and maintaining proper day-lighting environment are challenges for large atrium building.Aerogel glazing system has recently been considered to have great potential in energy-saving applications for architectural glass due to its special light transmission and thermal insulation properties.In this paper,the application of aerogel glazing in large atrium building is studied.Eight aerogel glazing samples are prepared by filling four aerogel particles with different diameters into hollow glass,and each of them has two thicknesses of 5mm and 7.5 mm respectively.The thermal and optical parameters are measured.The effect of skylight glazing shading coefficient Sc on indoor lighting and thermal environment are analyzed.The result indicates that the replacement of the skylight with aerogel glazing is more effective than the replacement of outside windows.The envelope heat gain is reduced by 31% with the replacement of Single Glazing from aerogel glazing HA on skylight,while indoor illumination level still meets the requirement.The natural ventilation of terraced classroom is obstructed and the air-conditioning takes more time.In the end of this paper,the cooling load,the natural ventilation and the lighting of terraced classroom are analyzed.The proper window-wall ration of 40~50%,open window ratio of 50% and the external shading coefficient of 0.6 are derived.After the above parameter optimization the air-conditioning operating time can be reduced by 40~50%.The seven factors,which affect energy consumption,including average heat transfer coefficient of external wall and window,solar heat gain coefficient of external window,the window-wall ration,indoor occupants,air-conditioning operation hours,temperature difference between inside and outside are studied by path coefficient method.Direct path and indirect path of each factor are calculated and the liner regression equation are also determined.The Research is of great significance and very practical to promote energy saving work in campus building in China.