Title of article :
Passive performance of glazed components in heating and cooling of an open-space office under controlled indoor thermal comfort
Author/Authors :
Francesca Cappelletti، نويسنده , , Alessandro Prada، نويسنده , , Piercarlo Romagnoni، نويسنده , , Andrea Gasparella، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2014
Pages :
14
From page :
131
To page :
144
Abstract :
According to the Fangerʹs comfort theory, the individual thermal sensation is mainly connected with the thermal balance of the human body. This balance and the related comfort indicators (the Predicted Mean Vote, PMV, and the correlated Predicted Percentage of Dissatisfied, PPD) depend on four environmental parameters (air temperature, humidity and velocity, and internal envelope mean radiant temperature) and two variables connected with the human being (physical activity and clothing). Differently from the other environmental parameters under the system control, the mean radiant temperature is strongly conditioned by the envelope characteristics, and in particular, by the presence of glazed surfaces whose insulating performance is commonly lower than the one of opaque components. Transparent components also admit solar radiation into the indoor environment, affecting the thermal balance of the building and of the occupants. In this paper, the heating and cooling energy needs of an open-space office with different windowsʹ characteristics have been analyzed under controlled internal comfort conditions. A set of configurations given by different windowsʹ glazing systems, area, disposition and orientation has been simulated, considering the climatic conditions of Paris, Milan and Rome. The passive energy performance of the different glazing solutions has then been compared accounting for the long-term comfort conditions (on seasonal basis). The time distribution of the Predicted Mean Vote (PMV) and the Discomfort Time weighted by the Predicted Percent of Dissatisfied (WDTPPD) are analyzed, including also the effect of the diffuse and beam solar radiation directly reaching the occupants through the windows.
Keywords :
Glazing systems , Energy performance , Indoor thermal comfort , Energy needs
Journal title :
Building and Environment
Serial Year :
2014
Journal title :
Building and Environment
Record number :
1218982
Link To Document :
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