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equipment is gasoline-fueled.  Energy requirements for biomass hauling are estimated for a truck, with a fuel economy of 5 mpg, hauling 37,000 lb of biomass over a 50-mile round trip.  The energy requirements per unit of product fuel are based on the process yield considerations in Section 4.2.

Table 4-5:  Energy Input for Biomass Collection

Forest Material

Urban Wood Waste

Energy Input

gal/ton

Btu/lb Biomass

gal/ton

Btu/lb Biomass

Diesel equipment

2.2

120

1.2

70

Gasoline equipment

15

8

Electricity

5 kWh

0.0004b

5 kWh

0.0002b

Diesel transport

37

37

a The split between gasoline and diesel is estimated on a Btu/lb basis from Kreebe.

b kWh/lb

Table 4-6:  Equipment Energy Use for Biomass Production

Energy consumption (Btu/gal)

Product

Yield-1

(lb/gal)

Scenario

Diesel Tractor

Gasoline

Equipment

Diesel

truck

Methanol

15 lb/gal

2

4830

540

555

Methanol

12.2 lb/gal

3

3928

439

451

The California Energy Commission (CEC) and DOE have explored numerous approaches for producing biomass feedstocks.  Two studies included estimates of energy inputs for wood based feedstock in California.

4.1.3  Truck Emissions

39

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