lca沒(méi)美國(guó)鋼產(chǎn)品的生命周期評(píng)價(jià)(編輯修改稿)
2025-03-07 17:16 本頁(yè)面
【文章內(nèi)容簡(jiǎn)介】 rs of milk packed in glass bottles or packed in carton, instead of 1 glass bottle versus 1 carton171818D r a f tPhase 1: Goal and scope definition (5)? Critical review and other procedural aspects– critical review to ensure the consistency, scientific validity, transparency of the report, etc.– internal review, external review, review by interested parties– procedural embedding of LCA: LCA as a (participatory) process181919D r a f tPhase 2: Inventory analysis (1)? Phase of life cycle assessment involving the pilation and quantification of inputs and outputs, for a given product system throughout its life cycle? Steps:– preparing for data collection– data collection– calculation procedures– allocation and recycling192023D r a f tPhase 2: Inventory analysis (2)? Central position for unit process– smallest portion of a product system for which data are collected? Typical examples:– electricity production by coal bustion– PVC production– use of a passenger car– recycling of aluminum scrap20Phase 2: Inventory analysis (3)? Data collection for unit processes:– flows of intermediate products or waste for treatment– elementary flows from or to the environmentelectricity productionelectricitycoalgenerator fly ashD r a f t21Phase 2: Inventory analysis (4)? Combination of unit processes into a product system? Graphical representation in a flow diagramelectricity productionelectricitycoal generatorfly ashcoal miningequipmentgenerator productionsteelfly ash treatmentgypsumsystem boundaryreference flowproduct systemD r a f t22Phase 2: Inventory analysis (5)D r a f t 23Phase 2: Inventory analysis (6)electricity productionwith cogenerationof heat (CHP)elect
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