thanks to an exchange with Salvatore Mellino from Naples University we found that the ecoinvent CD-ROM with ecoinvent data contains data sets that are not following the EcoSpold 1 specification and, when imported into openLCA, lead to incorrect results.
For example, the process "steel converter, low-alloyed, at plant" contains four times output group 0:
This contradicts the EcoSpold format specification I believe:
(note the "Products of multioutput processes are classified as allocated by-products (2)." Four reference outputs of a process seem to me to indicate multiple outputs, therefore, the waste should probably be better classified as 2).
In ecoinvent 2.2. and also in exports from SimaPro (version 7.3.3, previous versions may be different) there is only one reference outputgroup 0 per process data set; the same steel process there looks as follows (ecoinvent 2.2 data):
(note that there is only once an outputgroup 0).
Now, when openLCA imports the data set in the ecoinvent 2.1 version, it selects not the steel but a disposal as reference product for this process. This happens because the disposal appears earlier in the process exchanges list. This is of course not wanted. Version 2.2 is imported correctly.
So, as conclusion, DO NOT import ecoinvent 2.1 data in openLCA, but use the 2.2 version instead, available from us or, if you already have an ecoinvent licence, from the ecoinvent centre.
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