Author Topic: ecoinvent v3: Basic Units  (Read 4226 times)

Offline pbeilschmidt

  • Administrator
  • Hero Member
  • *****
  • Posts: 586
    • View Profile
ecoinvent v3: Basic Units
« on: November 01, 2012, 14:41 »
Here is an overview of the basic units used in ecoinvent v3 compared to the basic units used in ecoinvent v2.2.
For details on unit use in ecoinvent v3 see ecoinvent report No 1 Overview and Methodology (Data Quality Guidelines) pp. 69-71, for details on unit use in ecoinvent v2.2 see the previous ("old") ecoinvent report No 1 Overview and Methodology, p. 20 (section 4.6.2) and p. 23 (section 5.3.1).

Consequences of the changes in basic units for the use of old and new datasets in the models can be discussed below.

Basic Units used for Elementary Exchanges
ecoinvent v2.2     ecoinvent v3
kg     kg
kBq     kBq
m3     m3
m3a     renamed m3*year
m2     m2
m2a     renamed: m2*year
MJ     MJ
Nm3     --- > matched to 'm3'

Summary: 5 basic units for elementary exchanges are the same in ecoinvent v2.2 and ecoinvent v3, one has been merged into another existing one, two others have been renamed.

Basic Units used for Intermediate Exchanges
ecoinvent v2.2     ecoinvent v3
kg     kg
ha     --- > matched to 'm2'
m3     m3
Nm3     --- > matched to 'm3'
m     m
ma     renamed: m*year
m2     m2
m2a     renamed: m2*year
MJ     MJ
kWh     kWh
unit     unit
h     renamed: hour
a     renamed: year
---     l
---     kg/l
---     kg/s
---     l/hour
---     MW
tkm     renamed: metric ton*km
pkm     renamed: person*km
vkm     --- > matched to 'm'
LU (livestock unit)     --- > matched to 'unit'
pig place     --- > matched to 'unit'
kg SWU     --- > matched to 'kg'

Summary: 7 basic units for intermediate exchanges are the same in ecoinvent v2.2 and ecoinvent v3, 5 were newly introduced, 6 have been renamed, 6 basic units for intermediate exchanges were abandoned and merged into other existing units.

Please also check the official documentation (Table 9.2 and Table 9.3, p. 70 in Overview and Methodology, ecoinvent report No. 1) regarding the units.
« Last Edit: January 23, 2013, 11:18 by pbeilschmidt »
------------------------
Peter Müller-Beilschmidt
myUmberto Moderator
ifu Hamburg GmbH