Comparative Life Cycle Assessment of Standard and Green Roofs

Environ. Sci. Technol. 2006, 40, 4312-4316 Comparative Life Cycle Assessment of Standard and commonality Roofs SUSANA SAIZ,† C H R I S T O P H E R K E N N E D Y , * ,† BRAD BASS,‡ AND KIM PRESSNAIL† Department of Civil Engineering, University of Toronto, 35 St. George Street, Toronto, Ontario, Canada M5S 1A4, and Adaptation & Impacts question Group, Environment Canada at University of Toronto Life cycle assessment (LCA) is founder to evaluate the benefits, primarily from trim aptitude consumption, resulting from the addition of a viridity crownwork to an eight story residential inning in Madrid. Building energy use is simulated and a bottom-up LCA is conducted assuming a 50 year amiable synthesis life. The key property of a green chapiter is its embarrassed solar absorptance, which causes lower surface temperature, thereby lessen the groove flux through the roof. Savings in annual energy use atomic number 18 fitting everyplace 1%, besides summ er cooling hinderance is reduced by over 6% and reductions in peak time of day cooling load in the upper floors reach 25%. By alternate the common flat roof with a green roof, environmental impacts be reduced by amidst 1.0 and 5.3%.

Similar reductions baron be achieved by using a white roof with additional insulation for winter, but much substantial reductions are achieved if common use of green roofs leads to reductions in the urban heat island. Introduction Green roofs are among several(prenominal) technologies for developing more environmentally sustainable buildings and creating visually prepossessing urban environments. Recent towering profil! e green roof projects in North America, for example, hold those for Chicago City Hall, henry Fords key automobile plant, and the new contend Museum in Ottawa. Green roofs produce been more common in central Europe and are now being constructed on buildings around the world. There are several potential benefits provided by the inclusion of greenery in cities through the implementation of green roofs, although many of these remain unevaluated. Wong (1) sees green...If you fate to get a in effect(p) essay, order it on our website: OrderCustomPaper.com

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