The destructive time of temperature stratification during human movement and the recovery time after the human movement in the displacement ventilation system

Many factors such as human movement can weaken indoor temperature stratification and lead to the advantages of displacement ventilation (DV) disappearing. Yet investigation for stratified destructive time during recovery after stops are still meagre so far. The concepts dynamic steady-state static proposed compute time( T b ). isothermal surface 295K is engaged explain variation . At last, restoring c ) inquiries in our paper. conclusion follows: Firstly, value reaches a maximum at moving velocity 1m/s, since starts be broken when 1.0m/s. However, values remains about 50s velocities between 2.4m/s 4.0m/s. reason that disappear completely exceeds 2.4m/s. Finally, Tc keeps 250s 1.2m/s 2.0m/s. current study provides new insights into design DV system.