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14 Cards in this Set
- Front
- Back
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US Energy use (total and sector level, renewable share) |
About 100 quads total, 40% on buildings, 30% in industry, and 30% in transport. 10% renewables |
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CO2e intensity of energy sources |
Coal>NG>nuclear>hydro |
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Rank freight transportation modes for GHGs |
Airplane>truck>train>ship |
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Name 3 stages of LCA |
1. Goal definition and scope 2. Life cycle inventory assessment 3. Impact Assessment |
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Efficiency of US grid |
30% |
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"Goal" |
Defines the purpose and method of the LCA, including audience, application and objectives. |
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"Scope" |
Define function and functional unit Define system boundaries |
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System Boundary |
Which unit processes and which parts of the life cycle should be included in the study. |
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Life Cycle Inventory |
The quantification of relevant inputs and outputs for a given system throughout its lifecycle. |
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Steps in a Life Cycle Inventory |
1. Detailed flow diagram 2. Data collection plan 3. Collect data 4. Model system and report inventory |
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System Expansion |
Displacement: LCA subtracts alternative process from main process |
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Life Cycle Impact Assessment (LCIA) |
Translate the inventory to meaningful indicators of a product or system's impact on the environment and human health. |
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LCIA Components |
1. Classification: assign inventory results to impact categories. 2. Characterization: model inventory results to an indicator for each category (e.g. equivalency assessment) 3. Valuation (optional) |
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Endpoint vs midpoint impact |
Endpoint: evaluate the damage caused by a pollutant or resource depletion. Midpoint: indicator based on steps in the impact chain prior to endpoint |
