Research On The Winter Indoor Thermal Stratification And Air Conditioning Heating Load Of A Shopping Mall In Xi'an

Many shopping malls in the winter indoor temperature will appear on the high low phenomenon,especially in a huge atrium mall building,because the chimney effect in the atrium,the airflow in the thermal buoyancy effect gradually under the top to gather,thus the temperature stratification in the low end market phenomenon.Uneven indoor temperature will give people a strong sense of discomfort,which will not only affect the consumer's desire to buy,but also caused a great waste of energy.However,due to the lack of relevant norms and theories,the problem has not been solved wel.A shopping mall in Xi'an city as the research object,in the winter of store temperature,personnel and light intensity were tested and found that the mall in the upper layer temperature is significantly higher,and there are serious temperature stratification.Aiming at the above problems,using Energy Plus software modeling according to the basic situation of the existing building,according to the measured data to calculate the thermal load va lue of each layer under practical conditions,each layer of heat load and design conditions are analyzed,get the general rule of the building heat load changes,through further calculation and analysis the theory,summed up the building load transfer coefficient Ki.The load transfer coefficient Ki,to a certain extent,reflects the distribution of the load in the winter market,we can use the load transfer coefficient Ki,proposed to solve the winter market thermal stratification of specific programs.In all kinds of measures,we choose two kinds of measures to carry on the simulation verification with CFD software.By comparing the model of temperature field and velocity field,we found that the air and exhaust model in the model,the indoor temperature d istribution was even better than the original model,the temperature gradient decreased in variable air temperature gradient model,than the original model decreased by 0.8 degrees Celsius,the variable exhaust temperature model.Gradient than the original model decreased by 0.4 degrees Celsius,two models have a certain effect on the indoor temperature stratification,that we can use the regulation of load transfer coefficient Ki to room temperature.