Research On Building's Airflow Distribution Of Natural Ventilation And Evaporative Cooling Technology Using In The South Of Xinjiang

This paper made use of evaporative cooling technology to deal with extra-ventricular air and sent it to room in largest cooling load in summer for satisfying human thermal requirement with reasonable cost in summer in the building of Xinjiang, thermal nature ventilation could be used in transition season or existing suitable extra-ventricular temperature, and Trombe wall and solar energy chimney multiplexed system increase natural ventilation rate. This article aimed to research and analyze distribution of temperature field and velocity field.This paper was designed the sprinkling system dealing with extra-ventricular air and obtained indoor air. This section of numerical simulation carried on the numerical simulation software Airpak and established the model of k-εand the Face-to-Face radiation model to research this project. When the grids were built, the grids around the human working region were made more compact so as to describe the temperature field and the velocity field more accurately. Solar radiation value operating in the extra-wall was converted temperature and it could obtain extra-ventricular convert temperature in the last. The paper analyzed ventilation effect in different height between vent and floor and found economic height of solar energy chimney in multiplexed system by simulation in transition season.By analyzing design and the results of numerical simulation it could be found that extra-ventricular air temperature was 24℃, relative humidity was 73% by using evaporative cooling technology disposing outdoor air and this method disposing extra-ventricular air left out reheating and recooling plants and was very economic. When this state of air sent to the room, the lowest temperature was 26.4℃around the working man and workaround's temperature was between 26.8℃and 27.4℃, at the same time, air velocity was about 0.6 m/s, in this room the air could basic satisfy requirement of thermal comfort. However, the temperature was more than 29℃ in the outside workaround and air velocity was very low. When the distance was 1m between bottom of vent and floor the vent the ventilated effect of workaround was better. When height of solar energy chimney was increased natural ventilation rate was also increased In the Trombe wall and solar energy chimney multiplexed system, but height was reached constant value natural ventilation rate wasn't enhance. Economical height of solar energy chimney was 10m in the text.