Overview
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ABSTRACT
Thermal Regulation 2012 (RT 2012) is a French regulation intended to limit the financial and environmental impact of energy consumption in new buildings by enforcing a number of constraints. Among these, several typical values of energy efficiency will be limiting. The calculation of these values is the subject of a regulatory method called Th-BCE. This paper explains the overall calculation method to help give relevant professionals a better understand of it so they can enforce the regulations more effectively. More specific steps are detailed in another paper.
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Read the articleAUTHORS
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Bruno SLAMA: Manager of BBS Slama - Alumnus of the École Normale Supérieure de Saint-Cloud. Doctorate in Mathematics.
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Stéphane ROBIN: BBS Slama - Mathematics and Modeling Engineer – Polytech (Clermont-Ferrand)
INTRODUCTION
Successive French thermal regulations, from RT 88 to the current RT 2012, have seen a steady increase in the energy consumption requirements for new buildings. This increase in requirements is naturally accompanied by an increase in the complexity of the calculations needed to assess them.
The sheer scale of the calculations, and the resulting multiplication of parameters and input data, make it difficult to take an intuitive, or even physical, approach to improving energy efficiency in the regulatory sense. This is why a good understanding of the intricacies of the calculations carried out can pave the way for further optimization of the regulatory study.
The aim is for everyone involved in the building design and construction process to find the information they need to understand the "spirit" and particularities of the method. This will enable them to deal more effectively with tricky points and reduce bottlenecks.
The aim of this article is to explain the calculation method in its entirety, as well as general concepts such as taking the building environment into account. Other specific aspects are covered in a more detailed article
All the information presented is based on an in-depth study of the regulatory texts (decrees, orders), their appendices detailing the calculation methods, and certain standards cited in the texts themselves. A reconstruction of the primary modeling (RC method) of the simulation used has also helped to clarify the foundations of the method.
At the end of the article, readers will find a glossary summarizing the usual abbreviations used.
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KEYWORDS
regulation | energy performance | RT2012 | environment | energy performance
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The 2012 Thermal Regulations calculation method
Bibliography
Regulations
Décret n° 2010-1269 du 26 octobre 2010 relatif aux caractéristiques thermiques et à la performance énergétique des constructions – JO n° 0250 du 27 octobre 2010, page 19250, texte n° 2 – NOR : DEVU1020041D.
Arrêté du 26 octobre 2010 relatif aux caractéristiques thermiques et aux exigences de performance énergétique des bâtiments nouveaux et des...
Websites
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Energy savings in buildings (Ademe, and Ministère de l'Écologie, du Développement Durable et de l'Énergie). Information on all regulatory measures to improve the energy performance of buildings.
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French Ministry of Ecology, Sustainable Development...
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