Le caratteristiche termofisiche del patrimonio edilizio della città di Palermo

Research output: Other contribution

Abstract

[automatically translated] A confined space is an ongoing relationship with the outside bioclimatic context through the building envelope, which is known to place a security feature and filter to external input. A correct optimization of the building climate interface is linked, among other factors, also to the selection of whose carayyeristiche thermophysical materials are such as to facilitate the achievement of the above optimization. In particular, the knowledge of the time delay between the incident wave and the heat emerging inside the confined space, associated with the estimation of the heat flow attenuation factor, is a basic prerequisite for a correct bioclimatic design of the casings. The delay time and the attenuation factor are also two basic characteristics for the determination of the heat storage capacity of the multi-layer walls. And 'altresi known that this ability is able to optimize the use of free contributions modulating over 24 hours, and that the optimum configuration in terms of arrangement and thickness of the layers can facilitate the achievement of the conditions of thermo-hygrometric wellness . It 'well known that the wall structures with high delay time and modest attenuation factor generate good thermo-hygrometric conditions of comfort in the confined spaces in the presence of high external temperatures. In the light of the higher considerations it appears evident the ' importance to have available a repertoire on the thermophysical characteristics of building components, which constitute a prerequisite for the detection of the delay time and attenuation factors. The knowledge of the delay time, understood as a measure of the time lag between the maximum value of the temperature profile Air-Sole and the maximum value of the temperature on the inner surface of the multilayer wall, enables to pursue, in parallel to the casing edlizio project, the following objectives: - Improved well-being thermohygrometric inside the building; - Limitation of heat loss of the building to the outside environment; - Containment and optimization of energy consumption; - Proper use of free solar contributions. These objectives are part of the principles laid down in the new Community provisions, in particular in Directive 2002/91 EC of the European Parliament on the energy performance of buildings (Energy Performance of Buildings Directive, EPBD), published on 4 January 2003. This Directive requires the establishment the methodologies for estimating energy consumption of buildings differentiated state by state, but harmonized within a common framework of guidelines. The Directive is designed to lead to a substantial increase in investment aimed at improving the energy efficiency of buildings and provides a consequent acceleration in the initiation of interventions aimed at energy saving in buildings. Interventions concern the entire building stock, residential and non-residential,
Original languageItalian
Publication statusPublished - 2008

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