#Openlca no flow for reference in product system how to#
How to cite this: Consequential-LCA (2015). Reference flow and rebound effects for re-used bicycles An example on how to identify the system activities with the aim to model the reference flow for re-used bicycles.Further theory on the rebound effect Ignoring the rebound effect will lead to either under- or over-estimation of the effects of new technologies.For the present assessment, a reference service lifetime (RSL) corresponding to the manufacturer’s conservative assumption of lifetime is used. Further theory on effects on productivity of society When to include effects on the overall productivity of society and the overall societal rate of growth in a consequential LCA? The corresponding reference flow for each product system is presented in Table 5.Further theory on performance of product systems The reference flows must include any difference that involves additional processes in one or more of the analysed product systems.Effects on overall productivity of society.Differences in price and time consumption (rebound effect).Product Reference Flow (kg/m2) Reference Service Life (RSL) Replacement Cycle (ESL/RSL-1) Homogeneous Vinyl Sheet 3.58 10 6.5 3. Reference flows and RSL for the Vinyl Sheet flooring product. Difference in performance of product systems, product lifecycles during the 75-year period over which the product system is modeled is also summarized for the product in Table 5.Important aspects to address in relation to the reference flow for alternatives are: To use, import below packs as JSON-LD into openLCA. Create the flow 'PET Bottle, empty' with the flow type 'product flow' and the reference property. Repeat the same steps as above to create a product system for the respective process. This will open the pop-up window shown in Figure 5 above. Create the flow 'PET Bottle, filled, transported' with the flow type 'product flow' and the reference property 'Number of items'. Figure 5: Creating a product system in openLCA-I alternately: Open a process and select Create product system for the respective process, as shown in Figure 6 below.
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The purpose of the reference flows is to translate the abstract functional unit into specific product flows for each of the compared systems, so that product alternatives are compared on an equivalent basis, reflecting the actual consequences of the potential product substitution or alternatives. The ecoinvent and PSILCA databases from Nexus are already containing data quality systems, here below a collection of schemas to be used for assessing data quality in a product system calculation in openLCA. already modelled in the product system 'PET Bottle Production' of the 'openLCA 1.5 - Basic Modelling' documentation. The reference flow is thus a quantified amount of the product(s), including product parts, necessary for a specific product system to deliver the performance described by the functional unit.įor a composite product, the reference flow will typically be identical to the list of the product parts, multiplied by a factor to scale it to the functional unit. The reference flows are the specific product flows for each of the compared product alternatives.