|•Temperature gradient (no sharp stratification)
|• It is known that the temperature gradient is non linear and dependent
on supply airflow rate as well as supply air temperature.
|• However, it can be represented with two linear temperature
distributions without loss of any generality across the stratification level.
|• It should be kept under 2~3K/m as a requirement.
|• Pollutant gradient (usually sharp
|• This is considered as one of most advantageous aspects of
displacement ventilation, However, this is the case where pollution source ic
coincident with heat source.
|• It is reported that moisture follows the similar trend with
pollutant. (by Halton).