Assessment of the dynamic thermal performance of massive buildings

Abstract 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. 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 analysis of the transient behavior of this building permits to highlight the possibility of diversifying the time lag in relation to the wall orientation. A time lag of 12.00–14.00 h can be suggested for the walls due East. 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. 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. 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.

[1]  Maria Kolokotroni,et al.  Summer cooling with night ventilation for office buildings in moderate climates , 1998 .

[2]  Baruch Givoni,et al.  Comfort, climate analysis and building design guidelines , 1992 .

[4]  Francesco Patania,et al.  Thermal performance of ventilated roofs during summer period , 2012 .

[5]  Francis Allard,et al.  Night ventilation for building cooling in summer , 1997 .

[6]  J. Palyvos.  A survey of wind convection coefficient correlations for building envelope energy systems’ modeling , 2008 .

[7]  Niccolò Aste,et al.  The influence of the external walls thermal inertia on the energy performance of well insulated buildings , 2009 .

[8]  Elisabeth Gratia,et al.  How to use natural ventilation to cool narrow office buildings , 2004 .

[9]  Nathan Mendes,et al.  New external convective heat transfer coefficient correlations for isolated low-rise buildings , 2007 .

[10]  Aris Tsangrassoulis,et al.  On the cooling potential of night ventilation techniques in the urban environment , 2005 .

[11]  Dimitrios Bikas,et al.  The effect of south wall's outdoor absorption coefficient on time lag, decrement factor and temperature variations , 2007 .

[12]  H. Asan,et al.  Effects of Wall's thermophysical properties on time lag and decrement factor , 1998 .

[13]  N. Ito,et al.  Field experiment study on the convective heat transfer coefficient on exterior surface of a building , 1972 .

[14]  Luigi Marletta,et al.  A dynamic parameter to describe the thermal response of buildings to radiant heat gains , 2013 .

[15]  Karolos-Nikolaos Kontoleon,et al.  The influence of wall orientation and exterior surface solar absorptivity on time lag and decrement factor in the Greek region , 2008 .

[16]  Constantinos A. Balaras,et al.  The role of thermal mass on the cooling load of buildings. An overview of computational methods , 1996 .

[17]  Baruch Givoni,et al.  Performance and applicability of passive and low-energy cooling systems , 1991 .

[18]  R. Cole,et al.  The convective heat exchange at the external surface of buildings , 1977 .

[19]  Nicola Cardinale,et al.  Energy and microclimatic performance of Mediterranean vernacular buildings: The Sassi district of Matera and the Trulli district of Alberobello , 2013 .

[20]  Baruch Givoni,et al.  Effectiveness of mass and night ventilation in lowering the indoor daytime temperatures. Part I: 1993 experimental periods , 1998 .

[21]  M. M. Vijayalakshmi,et al.  Thermal Behaviour of Building Wall Elements , 2006 .

[22]  Koray Ulgen,et al.  Experimental and theoretical investigation of effects of wall’s thermophysical properties on time lag and decrement factor , 2002 .

[23]  Edna Shaviv,et al.  Thermal mass and night ventilation as passive cooling design strategy , 2001 .

[24]  Gianfranco Rizzo,et al.  Control of indoor environments in heritage buildings: experimental measurements in an old Italian museum and proposal of a methodology , 2005 .

[25]  E. Gratia,et al.  Guidelines for improving natural daytime ventilation in an office building with a double-skin facade , 2007 .

[26]  D. Asimakopoulos.  Passive Cooling of Buildings , 1996 .

[27]  V. Geros,et al.  Experimental evaluation of night ventilation phenomena , 1999 .

[28]  Sebastian Herkel,et al.  Design of passive cooling by night ventilation: evaluation of a parametric model and building simulation with measurements , 2003 .

[29]  O. Douzane,et al.  Incorporation of thermal inertia in the aim of installing a natural nighttime ventilation system in buildings , 1999 .

[30]  H. Asan.  Numerical computation of time lags and decrement factors for different building materials , 2006 .