Comparative Life Cycle Assessment of Standard and Green Roofs

Environ. Sci. Technol. 2006, 40, 4312-4316

Comparative Life Cycle Assessment of Standard and commons 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 inquiry Group, Environment Canada at University of Toronto

Life cycle assessment (LCA) is apply to evaluate the benefits, primarily from reduced aptitude consumption, resulting from the addition of a green crownwork to an eight story residential build in Madrid. Building energy use is simulated and a bottom-up LCA is conducted assuming a 50 year mental synthesis life. The key property of a green roof is its embarrassed solar absorptance, which causes lower surface temperature, thereby reducing the groove flux through the roof. Savings in annual energy use atomic number 18 just everyplace 1%, besides summer cooling hinderance is reduced by over 6% and reductions in peak hour cooling load in the upper floors reach 25%. By alternate the common flat roof with a green roof, environmental impacts be reduced by between 1.0 and 5.3%.



Similar reductions baron be achieved by using a white roof with additional insulation for winter, but more substantial reductions are achieved if common use of green roofs leads to reductions in the urban heat island.

Introduction
Green roofs are among several technologies for developing more environmentally sustainable buildings and creating visually attractive urban environments. Recent towering profile green roof projects in North America, for example, hold those for Chicago City Hall, Henry Fords key automobile plant, and the new War 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 full essay, order it on our website: Ordercustompaper.com



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