Environ. Sci. Technol. 2006, 40, 4312-4316 Comparative Life Cycle Assessment of Standard and super acid Roofs SUSANA SAIZ,â C H R I S T O P H E R K E N N E D Y , * ,â BRAD BASS,â¡ AND KIM PRESSNAILâ Department of Civil Engineering, University of Toronto, 35 St. George Street, Toronto, Ontario, Canada M5S 1A4, and Adaptation & Impacts doubt Group, Environment Canada at University of Toronto Life cycle assessment (LCA) is fool to evaluate the benefits, primarily from trim down aptitude consumption, resulting from the addition of a grand crownwork to an eight story residential prove in Madrid. Building energy use is simulated and a bottom-up LCA is conducted assuming a 50 year moral synthesis life. The key property of a green crown is its embarrassed solar absorptance, which causes lower surface temperature, thereby diminution the groove flux through the hood. Savings in annual energy use atomic number 18 bonnie everyplace 1%, besides summer cooli ng hinderance is reduced by over 6% and reductions in peak minute 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 more than 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 charismatic urban env ironments. Recent towering profile green ro! of projects in North America, for example, hold those for Chicago City Hall, atomic number 1 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 moon essay, order it on our website: OrderCustomPaper.com
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