![]() ![]() Results show that the high thermal inertia mass combined with natural ventilation reduces the indoor temperature during the nocturnal period, however the passive strategies resulted insufficient to obtain thermal comfort conditions during the following daytime hoursic correction. ![]() The thermal comfort in the two offices was evaluated using the PMV and PPD indices. Based on the measurements of several physical parameters, the thermal lag and the decrement factor were calculated for the two ways of building ventilation management. Two different experimental setup were conducted, the first without allowing nocturnal ventilation, while the second with nocturnal ventilation obtained by opening the windows from 8:00 pm to 8:00 am. The researchers have investigated the variation of both walls and indoor air temperatures in two rooms located on the east and west-facing sides. Experimental investigations were carried out on " Caserma Gaetano Abela ", an historical building located in Siracusa (Italy). The aim of this paper is to evaluate the thermal behaviour of a massive building during summer period. The results of both measurements and simulations indicate that high thermal inertia mass combined with natural ventilation prevents phenomena of overheating and ensures good comfort levels in occupied buildings, reducing the needs of cooling systems during summer period. Time lags higher than the values suggested above could be not fully functional, since delaying further the heat transfer from the wall to its inner surface, reduces the useful time for exploiting the cooling effect of the nocturnal ventilation. On the other hand, a time lag of around 8.00 h can be suggested to achieve the same result for the walls due West. A time lag of 12.00–14.00 h can be suggested for the walls due East. The analysis of the transient behavior of this building permits to highlight the possibility of diversifying the time lag in relation to the wall orientation. In particular, an experimental study has been carried out on Villa San Saverio, which is a massive historical building located in Catania (Italy), in order to characterize its thermal performance under dynamic conditions, and to evaluate the potential decrease of the indoor overheating by exploiting natural ventilation and limiting both internal and solar gains. The aim of this paper is the evaluation of the thermal behavior of a massive building under the synergic combination of natural ventilation and thermal inertia. ![]()
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