Simulation On Airflow Distribution Of Small Micro Space

People spend most time in all kinds of indoor environment, indoor environmental quality directly determines the health condition. Engineering practice shows that when people are in small micro spaces, such as capsule hotels, cars, train compartments, ship rescue capsule, space capsule and aircraft cabin space and other small micro-environment, often feels oppressed, having draft problem and many other air quality situations due to improper ventilation design, installation,and mismanagement.Considering the characteristics of small micro space, study reasonable airflow distribution, including the forms and reasonable distribution of air outlet, indoor temperature and speed, contribute to effectively improve air quality in small micro space, improve energy efficiency.Based on common characteristics of train compartments, capsule hotels and other small micro space, using the indoor zero equation turbulence model, conducted three-dimensional numerical simulation of different airflow outlet programs of top level Jets, observe temperature field and velocity distribution under different air distribution system; Evaluate the air distribution effectiveness, such as uneven coefficient, age of air value and ventilation efficiency, analysis the affection of the outlet layout program,temperature, speed on the airflow. Take capsule hotel as example, when the supply air temperature is 22 ℃, velocity is 1.25 m / s, human thermal comfort is good. For small and micro space, outlet position has little effect on energy utilization coefficient; energy utilization coefficient of different air distribution is close to one.