1st-assignment-08

1st-assignment-08 - Bren School of Environmental Science...

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Copyright Centre for Environmental Strategy 2002 Bren School of Environmental Science & Management 1 st Assignment – Industrial Ecology – ESM282 – W08 ________________________________________________ This exercise has been developed at the Centre for Environmental Strategy, University of Surrey, UK for its ENVIRONMENTAL LIFE CYCLE PROGRAMME Exercise 1: Calculation of energy in an LCA a) Drying your hands b) Getting to work The deadline for this assignment is 23 January 2008, 10:00am . Please hand in a hardcopy of your answers before class. You are encouraged to do the exercise and submit your answer in groups of up to 3 students. Only maths required are addition, multiplication and division. Pay special attention to the neces- sary conversion of physical units. All the information you need to solve the problems are given in the exercises or the appendix. In the case of important additional questions please contact Roland Geyer via email (geyer@bren.ucsb.edu). When you have done the exercises you should Feel confident in dealing with different units in quantitative analysis, and be able to convert between them. Understand the distinction between feedstock, process and primary energy. Appreciate the role of different assumptions, and the need for transparency, in undertaking this type of analysis. I hope you enjoy this exercise and look forward to discussing the results with you!
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Centre for Environmental Strategy 2002 This exercise has been developed at the Centre for Environmental Strategy, University of Surrey, UK For its ENVIRONMENTAL LIFE CYCLE PROGRAMME Exercise 1a: Drying your hands Exercise: 1) Identify a suitable functional unit based on service provision. Define the three reference flows and draw flow diagrams of the three product systems. 2) Calculate estimates of energy consumption when you dry your hands in each of the three ways shown above. Consider only those processes for which information is given on the next page. Aggregate and express energy use as total primary energy requirements. 3) Where, do you think, are the largest sources of error in this first order analysis? 2.
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1st-assignment-08 - Bren School of Environmental Science...

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