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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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why biosphere activities may appear in the technosphere matrix?

I was testing how to add a new "activity" to my biosphere3 matrix in brightway, and I got a new column in my technosphere matrix that I was not expecting, (corresponding to the id of my new biosphere node). Is this behaviour the expected one ?. Not…
Nabla
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Importation of method EF 3.0 - trouble with results

I wrote a script to import the characterization factors of the LCIA method EF 3.0 (adapated) on Brightway. I think it works fine as I see the right characterization factors on the Activity Browser (ex for the Climate Change method : but when I run…
pinarda
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nan score for self-created process

I am currently working with self-created processes in Brightway2 and I get nan scores when I try to run LCA. The processes are composed of ecoinvent 3.6 activities. Each ecoinvent activity has a correct score but when running the global process, the…
pinarda
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Brightway2 writing the imported database

I created several excel inventory files using the eco invent exchanges. To run my LCA I successfully imported the database with 0 unlinked exchanges using: imp =…
Luisa Lui
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Retrieve ecoinvent uuid in activity browser / brightway

Is it possible to retrieve the UUID of a ecoinvent activity in activity browser? If not, can i access an LCA instantiated in ab through a brightway jupyter notebook to find this data?
Carlo Prato
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LCI calculations in brightway and access to CFs

I have imported ecoinvent 3.7.1 on a brightway project and i followed a few tutorials to understand brightway set up procedures and usage. I want to use brightway to perform calculations on the inventory data of some processes (in particular i want…
Carlo Prato
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Can't find migration biosphere-2-3-categories

I import an Excel database: imp = bw.ExcelImporter(os.path.join("myfile.xls")) And then apply strategies to it: imp.apply_strategies() But this issue arises: AssertionError: Can't find migration biosphere-2-3-categories I would like to understand…
JeanS
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Error when validating impact assessment method data and issues with regional characterization factors

This question is somewhat related to this one. I am attempting to validate the data for a new impact assessment method, prior to writing the method. The method data contains characterization factors for both global and regional interventions. I…
pbaustert
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how to list all existing presamples campaigns in brigthway project

How can I list all existing presamples campaigns in my brighway2 project? :) I've been checking the documentation but I can't find how to do this.
Nabla
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Error when calling biosphere flows an activity in ecoinvent v.3.5

I happen to face an error when I try to call the biosphere flows of activity. And When I call the technosphere for different activities, it works fine. However, for the biosphere: [in] clinker_bio_exchange = [exc for exc in…
hessam_aj
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Brightway2 Excel Database Import Problem .write_database() ecoinvent

First of all, I am pretty new to bw2 and LCAs in general, so please be understanding. I currently work on a tool which exports the exchanges of an ecoinvent activity to an excel-sheet. Within the excel-sheet, I would like to change amounts and add…
tommrich
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Dealing with activity parameters with duplicate names in Brightway2

Brightway2 allows parameterization at the activity level. These activity-level parameters need to be added to a group via new_activity_parameters or add_to_group. I'm struggling finding the best approach for dealing with the case where (1)…
MPa
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How are multiple inputs of the same activity to a product handled when a database is imported?

For example, multiple inputs of the same "market for tap water, RoW" activity are used as for different purposes during an industrial process. Are the amounts of these inputs automatically summed up under one "market for tap water, RoW" activity,…
Q_T
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Is it possible to prevent modifications in the original Ecoinvent database in Brightway2 ? And impact world/Recipe 2016

Hello I have 2 questions: First: Is there a way of preventing the users to make modifications in the original Ecoinvent database but still allowing changes in the copies or manually added activities ? When modelling LCA processes, often I…
HemantS
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How to export database from brightway with ecosplod format?

What formats are available for exporting the database or project from brightway2? Is it possible to import it to openLCA? Is it possible to export as ecospold?
Mojtaba Sardar
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