Forum for ecoinvent Version 3

Here you find all boards with the latest posts of the Forum for ecoinvent v3

Written on 23.01.2017 by luciavalsasina see context

Dear Joana, 

 

The dataset was already present in version 2 of the database. To know more about the dataset you can access version 2 report 11 III "Paper and Board". You can read here how to access version 2 reports, if you never accessed ecoinvent online before pelase read here. In the report you will read, what is also reported in the comment for the exchange, that the value is an estimation based on lime kiln, for specifics see page 268 of the report. 

 

Best regards,
Lucia Valsasina, Data Analyst, ecoinvent

Written on 20.01.2017 by luciavalsasina see context

Dear Bachelier, 

 

we have contacted our experts who are reviewing the casting activities for both aluminium and steel. You are correct in saying that the values for aluminium are too high (probably by a factor of ~5 as you already pointed out). At the moment this is all the information I have but we will post the answer as soon as we receive the correction for the data. The issue is now also part of the section on known issues for version 3.3 on our website.

 

Thank you for your patience. 

 

Best regards,
Lucia Valsasina, Data Analyst, ecoinvent

Written on 20.01.2017 by Joana see context

Correction: I didn't mean why the emission is there, but rather why it is that value. I guess it relates to the yield of magnesia, and I'd like to know the source of the data.

Written on 20.01.2017 by Joana see context

Hello all,

The Magnesium oxide dataset has an emission of 0.909 kg CO2, fossil / kg MgO. Could this be due to the extrapolation from iron ore with lime beneficiation, on which the MgO process is based? Or what in the MgO production process warrants this emission?

Thanks,

 

Joana

 

Written on 19.01.2017 by luciavalsasina see context

Topic:
dry ice

Dear Lucia, 

 

I believe we do not have exactly what you are looking for but I believe you are able to model it given the products available in ecoinvent. I would recommend you to look into the ecoinvent report "ecoinvent 3 report_Refrigerated Transport.pdf", which you can download accessing ecoinvent online (ecoQuery, report section), if you never accessed before read here. This source might be helpful. 

 

Best regards,
Lucia Valsasina, Data Analyst, ecoinvent

Written on 16.01.2017 by studenthsn05 see context

Topic:
dry ice

Hello,

I need a material dry ice for chilled transportation of frozen food in styrofoam boxes. Is there any material available in ecoinvent for dry ice? I couldn't find anything yet..

Many thanks in advance.

Kind regards

Written on 12.01.2017 by marion.sie see context

Topic:
Hard coal ash

Dear ecoinvent people,

Could you please provide some pieces of answer to my message above?

In particular is blast furnace slag considered as a by-product and hard coal ash as a waste in the ecoinvent database? If yes, why?

Thank you very much for your answer.

Marion

Written on 11.01.2017 by luciavalsasina see context

Dear Mohammad,

 

I am afraid I do not have answer to your question. Both software support ecoinvent and they are both valuable tools to conduct LCAs. I would recommend you contact both software providers and discuss with them in order to assess which one better meets your needs. 

 

Best regards,
Lucia Valsasina, Data Analyst, ecoinvent

Written on 11.01.2017 by luciavalsasina see context

Dear Johann,

 

You can access ecoinvent online, if you never accessed before read here. Here you can look for the activities of your concern and see all the relevant documentation and flows in the undefined (i.e. before linking and allocation) and in the three system models form. Here you can also download the PDF documentation.

 

For more information on markets, I would like to refer you to the explanation of market activities on our website.

 

For it to be clearer for your study, you can for example download the PDF documentation for the GLO market for copper and consult the list of activities contributing to it. There you will see the mix of countries including Europe, which feed into the market. You can therefore use, for example, the GLO market for copper but use European activities for the assembly of the product. 

 

Auxilliary and energy inputs are datasets that include the materials, energy and emissions related to the use of a machine (see the comment for the included activities in the datasets of your interest). In terms of the appropriateness of using datasets referring to other products, such as capacitors, we cannot really help you and you would need to refer to literature and experts in the field. In the end the modelling choices are a user’s responsibility.

 

To know more on how to use services related to working of metals, please refer to the previous answer of my colleague Emilia on the topic. 

 

Best regards,
Lucia Valsasina, Data Analyst, ecoinvent

Written on 11.01.2017 by luciavalsasina see context

Dear Anna, 

 

To change this assumption you have to rely on the information about the average load factor, which can be found in the general comment for the relevant dataset. To change the load factor you have to make your own assumptions starting from the GVW for the truck, as emissions depends on it. I suggest you read the answer given on the forum on this subject by my colleague Guillaume, useful answer 1 and 2

 

Freight transport includes empty trips; from the "Data quality guidelines" page 22: "The transport datasets have names beginning with "transport, ...". The freight transport products describe the transport services in metric ton-kilometres with average load factors that include the average share of empty return trips".

 

Best regards,
Lucia Valsasina, Data Analyst, ecoinvent

Written on 09.01.2017 by JoDr see context

Dear Ecoinvent community,

 

I am trying to build a process for the production of an electric contactor from Romania. The main materials and chosen Ecoinvent activities are:

 

  • copper (Origin unknown) à market for copper [GLO]

  • steel (Origin unknown) à market for steel, low-alloyed, hot rolled [GLO]

  • silver (Origin unknown) à market for silver [GLO]

  • glass fibre/plastic (Origin unknown) à market for glass fibre reinforced plastic, polyamide, injection moulded [GLO]

  • electronic components (Origin unknown) à “market for printed wiring board, surface mounted, unspecified, Pb free [GLO]”

 

As the information about the different materials origin is not available I chose market activities in the first place. However I am still unsure whether this is a good idea, because I do know that the production processes of the contactor are realized in Europe/Romania. I know this does not mean, that the materials themselves are from Europe, but some of them surely are. I would be very grateful for any suggestions to overcome my concerns.

 

Furthermore I want to implement an activity for “energy and auxilliary inputs” for the production process of the contactor. I also don’t have information’s about production steps and energy input. Does it make sense to choose one of the “energy and auxilliary inputs” of other electronic components like inductors or capacitors? Should I use the activity “Metal working, average for metal product manufacturing” for the metal materials?

Thank you in advance.

Best regards

Johann