X hits on this document

321 views

0 shares

0 downloads

0 comments

26 / 113

to thermal energy incorporates the efficiency of the power conversion process.  For example, if a diesel engine generator set operates with an efficiency of 34.1 percent (HHV), 10,000 Btu are required to produce 1 kWh.

Table 2-6:  Composition of Biomass Materials

PIne

Eucalyptus

Poplar

Component

Wet

Dry

Wet

Dry

Wet

Dry

Moisture

57.06

40.4

5.6

Carbon

23.16

53.93

30.59

51.32

47.05

49.84

Hydrogen

2.68

6.23

3.67

6.16

5.73

6.07

Nitrogen

0.85

1.97

0.7

1.18

0.41

0.43

Sulfur

0.13

0.31

0.08

0.13

0.05

0.05

Ash

1.46

3.41

3.96

6.64

0.47

0.5

Oxygen

14.66

34.15

20.6

34.57

40.69

43.11

Total

100

100

100

100

100

100

HHV (Btu/lb)

3,996

9,306

5,265

8,834

7,421

7,861

Source:  A. D. Little

Both electric power and steam can be inputs and outputs for fuel production processes.  When power or steam are exported from a fuel production facility, energy is displaced from another facility.  Exports of power and steam result in a reduction in energy use and emissions and are counted as a credit in this study.  The quantification of credits is shown in Table 2-7.

Table 2-7:  Energy Credits for Power and Steam

Primary Energy

Location

Energy Displaced (HHV)

Carbon Displaced

1 kWh electricity

Indonesiaa

10,000 Btub

0.31 lb

10,000 Btu steam

Indonesia

12,500 Btub

0.39 lb

1 kWh electricity

California

8,500 Btuc

0.32 lb

a Surrogate for remote location.

b Natural gas.

c Estimated marginal energy from California mix.

15

Document info
Document views321
Page views321
Page last viewedFri Dec 09 23:28:27 UTC 2016
Pages113
Paragraphs4373
Words34174

Comments