Cet article rédigé par la Passive House Institut de Darmstadt en 1997 présente l’analyse du cycle de vie des bâtiments ayant des performances énergétiques différentes. En voici un résumé (l’article complet en PDF est téléchargeable ci-dessous).
The cumulative primary energy input (CEI) over a service life of 80 years has been compared for six construction standards (Fig. 1). For poorly insulated buildings (complying to the 1984 German Thermal Insulation Ordinance), the primary energy input for building production (PEI) only amounts to some 5% of the consumption of natural gas and primary energy for house-hold electricity. With the low energy house (LEH standard), the volumes of elec-tricity and natural gas consumption over the service life are brought to similar levels, amounting each to 45% of the total, so that further progress can above all be achieved by the efficient use of electricity (Low E House + electr. Eff.).
Improving to the passive house standard, very good thermal protection reduces the heat requirement to such a low level that a separate heating system is not necessary any longer. The PEI of future passive houses can be even lower than that of conventional new-build houses. Projects with cost-effective passive houses that cut the cumulative energy input by a factor of 4 are close to realisation. The approach to improve the building even more to a self-sufficient houses makes the cumulative energy input higher again than for a passive house, caused by the high primary energy input for production and replacement (R-PEI) of extensive technical systems.
|Life-cycle energy analysis : comparison of low-energy house, passive house, self-sufficient house
Dr. Wolfgang Feist, Passive House Institut, 1997
type : PDF | 321.4 ko | 15.07.2010