THERMAL BRIDGES HYGROTHERMAL PERFORMANCE IN BUILDING ENVELOPES SUBMITTED TO ENERGY REHABILITATION

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-21-6 / ISSN 1314-2704, June 19-25, 2014, Book 6, Vol. 2, 409-416 pp

ABSTRACT
The necessity of adopting a responsible attitude when using resources is rendered in all areas concerning energy through specific regulations derived from the general expressions of the principles of sustainable development. Buildings hold a major position in resource consumption, and if for the construction stage the materials investment is foreknowledged, the expense in controlling the indoor climate over a building’s life cycle is for certain indefinable. For each type of building envelope, minimum insulation levels are required in national building codes, with a scope extent from new projects to the existing stock that undergoes processes for thermal improvement. This paper reviews several alternatives in hygrothermal upgrading of enclosure elements with reinforced concrete structural walls or frames, in order to lay out good building practice for minimizing thermal bridges effects. By performing numerical simulations of heat and mass transfer in specific constructive details, for Jassy typical climate, comparisons between hygrothermal performance of mineral wool and renewable natural materials are drawn.

Keywords: sustainable development, energy performance, heat and mass transfer,
thermal bridges, numerical simulation.