Personnel thermal comfort and system energy-saving potential of a newventilation mode based on indoor non-uniform environment creation

In order to solve the thermal discomfort and energy waste problems caused by the inability of existing ventilation and air conditioning systems to achieve on-demand cooling according to the occupied area, this study proposes a new type of ventilation mode, which switches the airflow pattern combinations and cooling supply in real time according to the demand of the occupied area of the personnel, aiming to control specific demand scenarios by using the optimal combination of multiple airflow modes. Numerical simulation methods are used to investigate the thermal comfort of the personnel and the energy-saving potential of the system for the new ventilation mode under the conditions of different occupied areas, and to compare them with those of mixing ventilation mode and stratum ventilation mode. The results show that the new ventilation mode has obvious advantages in air distribution, and better thermal comfort than mixing ventilation mode and stratum ventilation mode, with the largest air diffusion performance index. The new ventilation mode has the lowest coefficient of local cooling capacity utilization and the highest effective utilization rate of cooling capacity, so the cooling capacity required is the smallest and the energy-saving potential is the greatest.