Role of green coverings in mitigating heat island effects: an analysis of physical models

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Worldwide, governments are introducing several rules and standards in the aim of limitingthe quantity of primary energy for air conditioning of buildings and supporting the use of renewablesource of energy for generating thermal and electric energy to be utilized in buildings such as theEuropean Directive on the Energy Performance of Buildings [1]. Along with these interventions,another important action takes currently place in the building sector, that is the introduction of passivestructural components of the envelope, able to reduce the requirements of energy for air conditioningpurposes. Among these building components, the so-called green roofs are becoming more and moreinteresting for designer and buildings owners. This simple technical solution, in fact, apart itseffectiveness in lowering particularly the summer cooling loads, could make more attractive theshape of each single building and, when adopted on a large extension, of an entire city district,reducing the risks for urban heat island phenomena that represent a severe problem in urban contexts.In this work, a short review of the literature models for computing the energy balance of roofcoverings will be proposed, with particular reference in modelling the heat exchange of a canopy.
Lingua originaleEnglish
Titolo della pubblicazione ospiteAPPLIED MECHANICS AND MATERIALS - Chapter 1: Energy Science and Saving Technology
Numero di pagine6
Stato di pubblicazionePublished - 2013

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