CIV ENG 11 Chapter Notes - Chapter 2: Bituminous Coal, Ap 42 Compilation Of Air Pollutant Emission Factors, Pacific Gas And Electric Company

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Published on 11 Oct
School
Berkeley
Department
Civil And Environmental Engineering
Course
CIV ENG 11
Professor
1
D
EPARTMENT OF
C
IVIL AND
E
NVIRONMENTAL
E
NGINEERING
U
NIVERSITY OF
C
ALIFORNIA
,
B
ERKELEY
CE11
E
NGINEERED
S
YSTEMS AND
S
USTAINABILITY
,
S
PRING
2020
HOMEWORK 5
DUE FRIDAY, MARCH 20, 2020 (TOTAL: 100 POINTS)
Fuel selection for electricity generation and air pollution (20 points)
1. Uncontrolled emission factors and heating value data for bituminous coal, residual fuel oil and
natural gas burned in utility boilers are given in Table 1. Consider a thermal electric power plant
that generates an average of 400 MW of electricity with an overall efficiency of 38%. Determine
for each fuel the annual uncontrolled mass of each of the pollutants (in units of metric tons per
year) that would be emitted from such a power plant. Please interpret your results. Is our analysis
complete? What else needs to be taken into consideration to assess which fuel is the cleanest? (20
points)
The following will be useful:
Energy (MJ) = Power (MW) * Time (s)
The overall efficiency of the power plant is:
  
 
1 gal = 3.785x10
-3
m
3
Table 1: Uncontrolled emission factors and heating value data
Bituminous coal Residual fuel oil Natural gas
(pulverized, 1.8% S) (no. 6, 2% S)
Heating value: 33.25 MJ/kg
fuel
41809.8 MJ/m
3
41.9 MJ m
-3
Emission factors:
CO
2
2.38 kg/kg
fuel
11.6 kg/gal
fuel
2.2 kg/m
3
PM 31 kg/Mg
fuel
2.9 kg/m
3
16 x 10
-6
kg/m
3
SO
2
35 kg/Mg
fuel
38 kg/m
3
9.6 x 10
-6
kg/m
3
NO 6.9 kg/Mg
fuel
8 kg/m
3
8800
x 10
-6
kg/m
3
Electricity power mix and carbon emissions (32 points)
2. The electricity grid mix varies based on your location. For example, using a kettle to boil water in
California results in more or less carbon dioxide than in Oregon. In this assignment, compare the
emissions associated with electricity in Berkeley (provided by PG&E), in California in general,
and at an unknown location in Oregon. You will find the following references helpful in
completing this assignment:
For Berkeley and for California, the latest data on the electricity (or power, or grid) mix are
from 2018. Refer to the Base Plan!
PG&E (2018), “Where your electricity comes from.”
https://www.pge.com/pge_global/common/pdfs/your-account/your-bill/understand-your-
bill/bill-inserts/2019/1019-Power-Content-Label.pdf, Accessed 3/3/2020 at 5:00pm
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Document Summary

Due friday, march 20, 2020 (total: 100 points) Fuel selection for electricity generation and air pollution (20 points: uncontrolled emission factors and heating value data for bituminous coal, residual fuel oil and natural gas burned in utility boilers are given in table 1. Consider a thermal electric power plant that generates an average of 400 mw of electricity with an overall efficiency of 38%. Determine for each fuel the annual uncontrolled mass of each of the pollutants (in units of metric tons per year) that would be emitted from such a power plant. What else needs to be taken into consideration to assess which fuel is the cleanest? (20 points) Energy (mj) = power (mw) * time (s) The overall efficiency of the power plant is: (cid:1831)(cid:1858)(cid:1858)(cid:1861)(cid:1855)(cid:1861)(cid:1857)(cid:1866)(cid:1855)(cid:1877)(cid:3404) (cid:1831)(cid:1864)(cid:1857)(cid:1855)(cid:1872)(cid:1870)(cid:1861)(cid:1855)(cid:1861)(cid:1872)(cid:1877) (cid:1868)(cid:1870)(cid:1867)(cid:1856)(cid:1873)(cid:1855)(cid:1857)(cid:1856) (cid:1834)(cid:1857)(cid:1853)(cid:1872)(cid:1861)(cid:1866)(cid:1859) (cid:1874)(cid:1853)(cid:1864)(cid:1873)(cid:1857) (cid:3400)(cid:1843)(cid:1873)(cid:1853)(cid:1866)(cid:1872)(cid:1861)(cid:1872)(cid:1877) (cid:1867)(cid:1858) (cid:1858)(cid:1873)(cid:1857)(cid:1864) Table 1: uncontrolled emission factors and heating value data. Electricity power mix and carbon emissions (32 points: the electricity grid mix varies based on your location.

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