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Questions tagged [brightway]

Use this tag for questions about the Brightway2 life cycle assessment (LCA) software.

Brightway2 is a open source framework for life cycle assessment (LCA). It doesn’t try to replace software like SimaPro or OpenLCA, but rather to offer new possibilities to those who want to break the limits of conventional LCA. So it's not for everyone, and you will need to invest some time learning about Python to use Brightway2. Basically, this is the framework for you if your project lies at the intersection of LCA and your imagination.

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De-aggregating ecoinvent processes in Brightway2

Let's say I want use an ecoinvent process for an automobile, and that the process model includes impacts for producing the car, maintenance, road maintenance, fuel, etc. And let's assume that I want to model the automobile without the fuel, because…
Deborah Sills
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How to make Simapro output datasets compatible with ecoinvent?

I need to link a Simapro output dataset with the ecoinvent database. Unfortunately due to permanent changes between these 2 databases, the code I use (Brightway) is not able to do a correct migration from one database to the other. Has anyone ever…
calimera
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Brightway2 and carculator: LCIA not characterizing CO2 biosphere flows?

I have recently started working with the carculator package with bw2. I have exported LCI from carculator to import into bw2 to conduct independent analyses. However, when calculating LCA scores with the imported data, bw2 seems not to be accounting…
Joris Šimaitis
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LCI data format in BW2

So I want to import my own LCI database to Brightway2, and my process has 3 valuable products. I found this example with co-products: https://github.com/massimopizzol/B4B/blob/main/02.2_Simple_LCA_co_products.py The example shows more or less how it…
Morphinka
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is it possible to extract "Description" of an ecoinvent activity?

I'm trying to automate the extraction of the "Description" of activities from ecoinvent database (e.g., "wood preservation facility construction, dipping/immersion tank | wood preservation facility, dipping/immersion tank"), using brightway2. As…
Q_T
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Unlinked exchanges when importing ecoinvent 3.8 ecospold 2

When I try to import ecoinvent 3.8 in the ecosplod_02 format I get: 19565 datasets 629959 exchanges 1655 unlinked exchanges Type biosphere: 15 unique unlinked exchanges which is a bit odd as it worked with the same files 3 weeks ago. When importing…
Felix
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Moving datasets from brightway2 to openLCA

So, from the brightway2 documentation I see that I can export datasets in Excel files, simaPro CSVs, ecospodld 1&2s, or JSONs (with the bw2 custom structure from what I understand). openLCA allows imports form excel, simaPro CSV, JSON-LD among…
myreich
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Error when running meta-analysis of LCIA methods notebook

I am learning Brightway2 and I have been doing the notebooks from the brightway2 Github repo. So far all notebooks I have done have run smoothly, I am stuck in one concerning Meta-analysis of LCA methods, more specifically when running line…
Mac M Ribo
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How to add new activities to an existing brightway2 database?

I loaded the ecoinvent database as shown below. I would like to calculate the impact of a created activity that takes in cotton fibre and polyester fibre as input and produces a mixed fibre as output. How do I do it? eidb =…
gary_brown
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Overestimated Monte Carlo results in brightway

I am running a Montecarlo simulation on ecoinvent v 3.8 consequential system model and when randomly sampling the activity market for waste paper, sorted' (kilogram, GLO, None) I get very unrealistic and overestimated results. myact =…
Massimo Pizzol
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Variation between MonteCarlo mean score and static LCA score

When I try to apply MonteCarlo calculations, I notice that the mean of the MC results is systematically higher than the static results For instance, with the production of Li-ion cell in China : cell=[i for i in bw.Database('ecoinvent 3.8_APOS') if…
teolavss
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Brightway2 - Importing ecospold1 processes exported from openLCA

I have an ecospold1 dataset extracted from openLCA and I would like to import it into Brightway2. Using the SingleOutputEcospold1Importer should read the ecospold files but apparently something is wrong in the file schema. Given the possible export…
Gustave Coste
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modelling uncertain exchanges in brightway using parameters

I am trying to define uncertain exchanges using parameters with Brightway25. I've created a very simle example following existing ones that looks like this: The database with this single activity imports fine with…
Nabla
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Recalculation of exchanges done twice

When using the function ParameterManager.recalculate() to get the actualised values of all the parameterized exchanges of my database, the functions ActivityParameter.recalculate() and ActivityParameter.recalculate_exchanges() are applied to all the…
pinarda
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CAS-Number available in Brightway2 for chemcial reference products of ecoinvent database?

In Brightway2, you can view the properties of an exchange with exchange.as_dict(). This dictionary contains a lot of information, which are also available on ecoinvent. Unfortunately, I can't find the CAS number as property. Is there a possibility…
Stefan
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