lec21_22 - MIT OpenCourseWare http/ocw.mit.edu 1.020...

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MIT OpenCourseWare http://ocw.mit.edu 1 .020 Ecology II: Engineering for Sustainability Spring 2008 For information about citing these materials or our Terms of Use, visit: http://ocw.mit.edu/terms .
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1.020 Ecology II: Engineering for Sustainability Lectures 08_21 & 08_22 Life Cycle Assessment -- Concrete Production Motivation/Objective Develop a Life Cycle Assessment (LCA) that identifies the resources consumed and waste produced in the manufacture of 1 m 3 of concrete. Approach 1. Identify the product of interest (e.g. concrete), specify relevant processes, draw system boundaries to define scope of the LCA. 2. Define inputs and outputs for the processes included in the LCA. Distinguish economic and environmental variables. Define units for all variables. 3. Construct technology matrix ( A ) and environmental matrix ( B ). Estimate values for matrix elements from LCA data bases (available on-line for a fee). 4. Use MATLAB to solve LCA matrix equations for environmental vector (
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lec21_22 - MIT OpenCourseWare http/ocw.mit.edu 1.020...

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