Year-round Energy Saving Potential for a Stratum Ventilated Subtropical Office

Stratum ventilation has been proposed to cope for elevated indoor temperature recommended by governments in East Asia. TRNSYS is used for computation of the space cooling load and system energy consumption. A typical Hong Kong office is investigated. Compared with mixing ventilation and displacement ventilation, stratum ventilation derives its energy saving potential largely from the following two factors: a reduced ventilation load and increased coefficients of performance (COP) for chillers. The year-round energy saving is found to be substantial at 25% and 44% when compared with displacement ventilation and mixing ventilation respectively.