Land Water and Critical Materials Requirements

Storage requirements are included in both the station and cropland area estimates shown in Table 4. About one wee k of storage at the plant site is assumed. Transfer stations are included in land estimates. Feedstock requirements ar e based on biomass at 19.77 GJ/MT (8,500 Btu/lb), and the capacity factors from Table 2.

As discussed in the Overview of Biomass Technologies, large-scale dedicated feedstock supply systems to suppl y biomass to biomass power plants do not exist in the U.S. today. Because the U.S. DOE has recognized this fact, a large share of its commercial demonstration program directly addresses dedicated feedstock supply. Projects in New York , Iowa, and Minnesota are developing commercial feedstocks of both woody and herbaceous varieties. Feedstoc k development (e.g., hybrid poplar and switchgrass) and resource assessment are also underway at Oak Ridge Nationa l Laboratory.

Furthermore, many examples in the forest products industries (e.g., pulp and paper) and agriculture industries (e.g. , sugar) demonstrate sustainable utilization of biomass residues for power and energy production. In the U.S. an d abroad, numerous examples demonstrate that the agriculture, harvest, transport, and management technologies exis t to support power plants of the proportions discussed in this technology characterization.

Table 4. Resource requirements.

Indicator

Base Year

Name

Units

1996

2000

2005

2010

2020

2030

Plant Size

MW

50

60

100

150

184

184

Land

Plant

ha/MW

0.902

0.902

0.902

0.902

0.902

0.902

ha

45.1

54.1

90.2

135.3

166.0

166.0

Crops

ha/MW

487

401

268

268

164

164

ha

24,350

24,060

26,800

40,200

30,176

30,176

Crop Growth Rate

Mg/ha/yr

11.2

11.2

16.8

16.8

22.4

22.4

Power Plant Water

Mm3/yr

0.808

0.808

1.341

2.012

2.426

2.426

Energy: Biomass

PJ/yr

5.35

5.35

8.90

13.34

13.34

13.34

Feedstocks: Biomass

Tg/yr

0.271

0.271

0.450

0.675

0.675

0.675

Labor

Farm (261 ha/FTE)

FTE

95

95

101

152

114

114

Station

FTE

22

22

22

30

35

35

Note: FTE refers to full-time equivalent.

Note: FTE refers to full-time equivalent.

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