Abstract
Following development and validation of the SOLENE-microclimat tool, the underlying model was used to compare the impacts of various “greening strategies” on buildings’ summer energy consumption and indoor comfort. This study distinguishes between direct and indirect impacts by successively implementing the test strategies on both the studied building and surrounding ones; it also considers insulated vs. non-insulated buildings. Findings indicate that green walls have a direct effect on indoor comfort throughout the entire building, whereas the effect of green roofs is apparently primarily confined to the upper floor. Moreover, the indirect effect of a green wall is greater, mainly due to the drop in infrared emissions resulting from a lower surface temperature. It has also been proven that the indirect effects of green walls and surrounding lawns can help reduce the loads acting on a non-insulated building.
Highlights
France’s total energy consumption and the share generated by the country’s residential and commercial sectors have stabilized since 2006 at values of 164 Mtoe and 68 Mtoe, respectively.These two sectors account for 43% of all energy consumption and 23% of CO2 emissions
For the European building sector taken as a whole, the air conditioning of occupied spaces has been estimated at 57% of total energy demand and 33% of CO2 generation
The SOLENE-microclimat project was first developed for the purposes of an urban insolation assessment
Summary
France’s total energy consumption and the share generated by the country’s residential and commercial sectors have stabilized since 2006 at values of 164 Mtoe and 68 Mtoe, respectively.These two sectors account for 43% of all energy consumption and 23% of CO2 emissions. France’s total energy consumption and the share generated by the country’s residential and commercial sectors have stabilized since 2006 at values of 164 Mtoe and 68 Mtoe, respectively. The building sector is key to fulfilling the commitment made in 2003 by the French Government to the international community that calls for cutting by 75% the nation’s greenhouse gas emissions by 2050. Speaking, such a reduction is much easier to achieve in new buildings than from retrofitting the large stock of older buildings, as part of a program that would need to be planned over a several-year period. The effectiveness of such solutions, requires extensive knowledge of the correlations existing between climate and the thermal behavior of buildings
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