Tag: Study type: Screening LCA
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G-17 Differences in background data system boundaries
Aspect G-17 Differences in background data system boundaries Description Currently, practitioners have to deal with various different data sources, such as public or commercial LCI databases, EPDs, literature, etc. All these data have been calculated by applying different rules, and so special attention has to be paid to assessing the consistency of these different sources.…
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G- 18 Allocation case for cement-based materials
Aspect G- 18 Allocation case for cement-based materials Description Increasing numbers of building products are being made of secondary raw materials (SRM), or of generated waste that can be recycled throughout their life cycle. On the one hand, recycling eliminates the need to use virgin raw materials. On the other hand, the new commercial interest…
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G-18 (Buildings) / G-16 (Products) Allocation
Aspect G-18 (Buildings) / G-16 (Products) Allocation Description Normally, LCA studies should focus only on a single product at a time. However, systems under assessment often produce more than one product. The same problem arises when different waste flows are treated collectively in the same process (e.g. incineration). In these situations, the allocation problem arises:…
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G-19 Allocation examples for wooden products
Aspect G-19 Allocation examples for wooden products Description Increasing numbers of building products are being made of secondary raw materials (SRM), or of generated waste that can be recycled throughout their life cycle. On the one hand, recycling eliminates the need to use virgin raw materials. On the other hand, the new commercial interest in…
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G-19 Allocation case: production of renewable energy on-site
Aspect G-19 Allocation case: production of renewable energy on-site Description The production of on-site renewable energy can occur at different time of the day, month and year, and may or may not meet on-site needs. Renewable energy may be consumed on site, or may be exported to the electricity grid or to a heating network,…
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G-20 Define reference building
Aspect G-20 Define reference building Description The whole-life performance of nearly all building products can be assessed only in the context of a specific building. Is it possible to set a reference building for this comparison? related study objective ☒ stand-alone LCA ☒ comparative assertion related study phase ☒ ☐ ☐ ☐ ☐ goal and…
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G-20 (Buildings) / G-17 (Products) Allocation case: reuse, recycling and recovery
Aspect G-20 (Buildings) / G-17 (Products) Allocation case: reuse, recycling and recovery Description When the lifespan of a product ends, it can be reused, recycled, or used for recovery in another product system. These recovery operations entail a benefit for the system that yielded them. How to allocate these benefits to the system under study,…
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G-24 Collecting foreground and background data for product LCA
Aspect G-24 Collecting foreground and background data for product LCA Description Different data need to be collected for a product LCA study. The most important data collection is usually the production stage especially for highly complex manufacturing processes. The data can be based on industry or companies involved in the project else on secondary sources…
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G-21 Background databases in LCA studies
Aspect G-21 Background databases in LCA studies Description According to the ILCD Handbook, the background system comprises those processes that are not under the direct control or decisive influence of the producer of the good. For attributional modelling these are typically processes for both the upstream and downstream parts of the entire life cycle of…
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G-22 (Buildings) / G-23 (Products) Data quality
Aspect G-22 (Buildings) / G-23 (Products) Data quality Description Generally speaking, the data quality in LCA refers to the relevance of generic or specific LCA data in accordance with the goal and scope of the study. Depending on the background data sources (literature, industry data), and the boundaries and context of the study (e.g. for…