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Streamlined LCA Workshop. Energy as an Indicator of Environmental Performance. “Cumulative Energy Demand (CED) correlates well with most impact categories such as global warming, resource depletion, acidification, eutrophication, tropospheric ozone formation, ozone depletion and human toxicity”
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Energy as an Indicator of Environmental Performance • “Cumulative Energy Demand (CED) correlates well with most impact categories such as global warming, resource depletion, acidification, eutrophication, tropospheric ozone formation, ozone depletion and human toxicity” • Huijbregts et al., Environmental Science & Technology Vol 40 No 3, 2006 (Paper on Website)
The Most Basic Streamlined LCA • Extraction and manufacture • (Mass in kg) X (50MJ/kg) for most commercial products • (Mass in kg) X (200MJ/kg) for heavily aluminium based products • (Mass in kg) X (2000MJ/kg) for heavily electronic based products
The Most Basic Streamlined LCA • Transport • The most significant journey is the transport to the shops • Approx 10MJ per mile / number of items purchased
The Most Basic Streamlined LCA • Use • Electrical : (watts X s X 3) / 1,000,000 • Consumables : (mass in kg) X 50MJ/kg
The Most Basic Streamlined LCA • Disposal • (Mass in kg) X (2MJ/kg)
Extraction & Manufacture Use End of Life Disposal Transportation Life Cycle Stages