Search found 20 matches

by gebbissimo1
12 Jan 2014 19:29
Forum: Modelling
Topic: Substitution approach yields wrong conclusions maybe?
Replies: 0
Views: 2349

Substitution approach yields wrong conclusions maybe?

Dear all, I am worried that the substitution approach might yield wrong conclusions about the benefit of using recycled material if the reprocessing step has higher impacts than the processing step. You will find a brief pictured explanation at http://energy.m21.cc/files/Recycling.pdf It is possible...
by gebbissimo1
20 Oct 2013 16:35
Forum: Modelling
Topic: Recycling ratio irrelevant (in ecoinvent database)?
Replies: 0
Views: 2859

Recycling ratio irrelevant (in ecoinvent database)?

Dear all, I was investigating today at how the production of a car is modeled in the ecoinvent v3 database, more specifically the recycling of the passenger car.The question is not specific to the ecoinvent database, however. Essentially, the production is modeled as followed: ... -> iron scrap -> s...
by gebbissimo1
17 Apr 2013 10:12
Forum: Other
Topic: tutorial
Replies: 1
Views: 8282

Re: tutorial

Further issues you might encounter / things, which might be of interest to you: # When importing LCIA methods, units are unassigned (v1.2.9) => Please see http://openlca.org/forum/viewtopic.php?f=13&t=38#p18083 # Conversion factors when assigning units (p27 of tutorial) => In principle a line always...
by gebbissimo1
02 Apr 2013 14:46
Forum: Modelling
Topic: big difference (3.6x) between ecoinvent and openLCA results
Replies: 2
Views: 4115

Re: big difference (3.6x) between ecoinvent and openLCA resu

Dear Andreas, I found another small error. I guess it's not a bug in the calculation algorithm, rather in parsing the ecoinvent database: In the process "operation, passenger car, diesel, EURO5 (CH)" the output in openLCA is 1000km, while according to the ecoinvent v22 database it should be 1km. Thi...
by gebbissimo1
02 Apr 2013 14:37
Forum: Modelling
Topic: Error in impact assessment
Replies: 1
Views: 2482

Re: Error in impact assessment

Hi Frida, unfortunately I cannot be of much help, but I doubt that this is a bug in openLCA. Even if there is a bug with a process, I cannot imagine why it would pop up in one product system and not the other one. Thus, I would currently bet that you got one number false. Can't you narrow down the b...
by gebbissimo1
02 Apr 2013 14:27
Forum: Other
Topic: selecting the calculation method (was: Life Cycle Inventory)
Replies: 6
Views: 9319

Re: selecting the calculation method (was: Life Cycle Invent

Hi Romana, glad that you're finding the tutorial useful. Just to make sure: You have imported some LCIA methods, right? Neither openLCA nor the U.S. NREL LCI or ELCD database come with those methods. You can download them from the openLCA website though (see http://openlca.org/forum/viewtopic.php?f=...
by gebbissimo1
12 Mar 2013 13:48
Forum: Databases
Topic: LCIA methods for ELCD?
Replies: 4
Views: 5107

Re: LCIA methods for ELCD?

I'm not at all an expert, but in my impression you have to differentiate a bit between process databases (such as ELCD, NREL, ecoinvent) and LCIA methods. To my understanding... - ILCD vs. ecospold are just formats, maybe comparable to jpg and gif - openLCA can import both formats - the ELCD databas...
by gebbissimo1
12 Mar 2013 13:23
Forum: Result Interpretation
Topic: Negative Results for Resource Use
Replies: 1
Views: 3285

Re: Negative Results for Resource Use

Hi Frida, unfortunately I cannot help you with respect to your problem. However, there's an easy workaround: you can export the calculation results of your product system to excel (see screenshot attached). Then you can plot the bar chart in excel / libreOffice / .... I believe it would just represe...
by gebbissimo1
10 Mar 2013 20:47
Forum: Modelling
Topic: big difference (3.6x) between ecoinvent and openLCA results
Replies: 2
Views: 4115

big difference (3.6x) between ecoinvent and openLCA results

Hello openLCA team, I am not 100% sure, but believe to have found a systematic error in the openLCA LCI and LCIA calculation for some ecoinvent processes (electricity processes): Process: "electricity, high voltage, production GR, at grid" (, whose output is 3.6kWh electricity... amongst others) Pro...
by gebbissimo1
10 Mar 2013 20:18
Forum: Databases
Topic: LCIA methods for ELCD?
Replies: 4
Views: 5107

Re: LCIA methods for ELCD?

Dear Dr Ludwig Gredmaier, === LCIA methods You can download the collection of LCIA methods from the ecoinvent centre here: http://www.openlca.org/download_page#LCIA_methods I believe every major LCIA method is included, IPCC 2007 certainly is. Before the import you will currently have to create a ne...