Loading (50 kb)...'

(continued) ns (in tons) = (yrly wtd. av. fuel sulfur %) × (AP–42 fact.) × (1-scrb. effic. %/100) × (units conver. fact.) × (yearly fuel burned)

For coal, the yearly fuel burned is in tons/yr and the AP–42 factor (which accounts for the ash retention of sulfur in coal), in lbs SO2 ton coal, is by coal type:



------------------------------------------------------------------------
Coal type AP-42 factor
------------------------------------------------------------------------
Bituminous, anthracite................... 39 lbs/ton
Subbituminous............................ 35
Lignite.................................. 30
------------------------------------------------------------------------


For oil, the yearly fuel burned is in gal/yr. If it is in bbl/yr, convert using 42 gal/bbl oil. The AP–42 factor (which accounts for the oil density), in lbs SO2/thousand gal oil, is by oil type:



------------------------------------------------------------------------
Oil type AP-42 factor
------------------------------------------------------------------------
Distillate (light)................... 142 lbs/1,000 gal
Residual (heavy)..................... 157
------------------------------------------------------------------------


For all fuel, the units conversion factor is 1 ton/2000 lbs.

Appendix D to Part 72—Calculation of Potential Electric Output Capacity
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The potential electrical output capacity is calculated from the maximum design heat input from the boiler by the following equation:


For example:

(1) Assume a boiler with a maximum design heat input capacity of 340 million Btu/hr.

(2) One-third of the maximum design heat input capacity is 113.3 mmBtu/hr. The one-third factor relates to the thermodynamic efficiency of the boiler.

(3) To express this in MWe, the standards conversion of 3413 Btu to 1 kw-hr is used: 113.3×10 6 Btu/hr×1 kw-hr / 3413 Btu×1 MWe / 1000 kw=33.2 MWe

[58 FR 15649, Mar. 23, 1993]