Z E M C H 2 0 1 2 I n t e r n a t i o n a l C o n f e r e n c e
260
Figure 10
: 3 p.m., temperature on second floor
Figure 11
: 12 a.m., velocity and temperature on cross section
Chimney effect starts in the Fountain Room and in the central hall (probably the real
"
sollatia
" of the sovereign); this entails that hot air is expelled from the top and the fresh
air is drawn from outside through the openings (Fig.12-13).
The particular shape of these rooms makes them fairly cool (28-29°C), but in the rooms
placed in the two wings of the building, that are less ventilated, the hot air piles up and
stratifies itself, reaching temperatures up to 30°C (Fig.13).
The building shape facilitates the use of the pressure gradient due to the breeze.
Particularly, at 3 p.m., air flow rises into the building, following different paths from east
to west. The air movement involves many different rooms until the maximum value of
1m/s (Fig.14).
In this case the internal temperature does not exceed 30°C, because the breeze has an
initial value of 25°C (Fig.15-16).
