Utilisation of Passive Solar Energy - Renewable Energy: Technology, Economics and Environment - page 121

rate, temperature rises to above 40 °C. However, the maximum temperature in the
adjacent living space only amounts to 30 °C.

June 21

December 21

Heating period:
ventilation flaps,
windows
(manual or
automatic control)

Summer case:
ventilation flaps,
windows
(manual or
automatic control)

Sun
space

Fig. 3.13 Operation principle of a sunspace /3-10/

In multiple family homes, sunspaces often serve as hallways, as room tempera-
ture fluctuations are more easily accepted there than in living spaces. However,
temperature distribution needs to be carefully observed in these high spaces, and
natural air circulation/air currents need to be taken into account. For this purpose
most sunspaces are provided with flaps at the bottom and the top, to let fresh air in
and to evacuate overheated air.

θ ss

θ fl θ ce

θ e

θ i

July 27 July 28

July 29

Fig. 3.14 Temperature flow of a sunspace in summertime (for abbreviations see text; e.g.
/3-11/)