Table 5

System performance metrics for spatial scale, spatial distribution and technological scenarios

Scenario

Current

Future


Grid scale (km2)

Grid scale (km2)


Metric

Unit

25

50

100

25

50

100


Centralised

Ethanol cost

$2007.lEtOH-1

0.714

0.605

0.579

0.350

0.328

0.328

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km

53

70

114

53

107

97

L:C ratio**

-

0.17

0.29

0.45

0.45

0.86

0.79

No. plants

-

1

2

4

1

1

5

Max. plant***

106 l year-1

109

297

546

742

2970

2620


Corner-Point

Ethanol cost

$2007 lEtOH-1

0.712

0.601

0.578

0.355

0.337

0.346

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km

48

71

102

48

66

82

L:C ratio

-

0.17

0.28

0.46

0.33

0.49

0.75

No. plants

-

1

2

4

1

3

8

Max. plant

106 l year-1

109

297

533

742

1230

2380


*The average unit-biomass transport distance

**The ratio between logistics costs and process capital and operating costs

***Maximum single-plant scale observed within system

Dunnett et al. Biotechnology for Biofuels 2008 1:13   doi:10.1186/1754-6834-1-13

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