Cooling parameters of hybrid air conditioning system and dynamic responses of rooms to parameter change

Conducts CFD simulation on an office with the hybrid air conditioning system of chilled ceiling panel and displacement ventilation, and reveals the influences on indoor thermal comfort of such cooling parameters as the rate, temperature and relative humidity of supply air flow, the surface temperature of chilled ceiling panel and the area ratio of chilled ceiling panel to ceiling by means of range analysis and variance analysis methods. Simulates the dynamic responses of room air to the change in supply air flow rate, which has the largest effect on PMV, and analyses the change of the air temperature and relative humidity in the occupied zone and non-occupied zone with time. The results show that the time that the indoor air reaches steady state again is longer so the VAV control method is not applicable, and that the possibility of dew occurring on the chilled ceiling panel is very less.