Net ZEB Case Studies - Modeling, Design, and Optimization of Net-Zero Energy Buildings - page 423

Fig. 7.55 Ventilation flow rate and temperature profiles of the 1SS2
thermal zone (100 CFM equals to 47 l/s; 1SS2 slab is the ceiling slab of
thermal zone 1SS2)
As shown in Figure 7.56 , the room temperatures were relatively stable
regardless of the outdoor conditions. The room temperature is allowed to
drop slightly after 6 P.M., and is regulated back to the normal room heating
setpoint after 6 A.M. The other operation strategy for space conditioning
using the hydronic radiant ceiling slab was described earlier in Section
7.4.2.4. A relatively higher slab temperature is required for the north
thermal zone to bring the room temperature back up to its setpoint in the
early morning (6 A.M.) after the nighttime set-back in winter.