Project report on the office building ‘SD Worx’. Good thermal summer comfort is achieved by passive cooling of exposed concrete ceilings. Night ventilation air entering the north façade cools the concrete slabs and leaves through a vertical ventilation zone located at the south side. In addition, two concrete tubes serve as an earth-to-air heat exchanger, which cools down the ventilation air on hot summer days.
Good description of a passive cooling concept by use of exposed concrete parts and night ventilation. Measurements of indoor and outdoor temperature during summer 2002 are reported and compared to the results of thermal simulations. The positive effect of concrete on the peak temperature and the phase difference between indoor and outdoor temperature is described.