**Androscoggin Power Boilers #1 & #2**
**Given/Assumptions** Generation capacity (MW ) 68 Fuel High Heating Value (Btu/gal) 150,000 Maximum Fuel Consumption Rate (gal/hr) 4.5E+03 Maximum Annual Fuel Consumption (gal) 3.97E+07 Maximum Annual Heat Input (mmBtu) 5.96E+06 Actual annual heat input (mmBtu) 1.87E+06 Number of SNCR Operating Days 365 Uncontrolled NOx Concentration (lb/mmBtu) 0.41 Uncontrolled NOx Emissions (tpy) 383 Required Controlled NOx Concentration (lb/mmBtu) 0.27 ash product (Btu/mmBtu) 7.7E+04 Stored Urea Concentration 50% Injected Urea Concentration 10% Reagent Heat of v aporization Hv (lb/Btu) 900 Reagent Molecular W eight (g/mole) 60.06 SRT 2 Reagent Density (lb/ft3 @ 60F) 71.0 Reagent Specific Volume (gal/ft3) 7.481 NOx Molecular W eight (g/mole) 46.01 Number of Days of Storage for Urea 14 Equipment Life (years) 20 Annual Interest Rate 7% Inflation Since 1998 1.35 Wa ter Consumption Cost ($/gal) 0.0004 Electrical Power Cost ($/kW h) 0.08 $ 50% Urea Solution Cost ($/gal) 1.25 $ Oil Cost ($/mmBtu) 6.71 $ Ash Disposal Cost ($/ton)estimated

company report calculated 680 mmBtu/hr from company report calculated calculated calculated OAQPS Control Cost Manual company report company report calculated OAQPS Control Cost Manual OAQPS Control Cost Manual OAQPS Control Cost Manual OAQPS Control Cost Manual OAQPS Control Cost Manual OAQPS Control Cost Manual OAQPS Control Cost Manual OAQPS Control Cost Manual OAQPS Control Cost Manual OAQPS Control Cost Manual OAQPS Control Cost Manual OAQPS Control Cost Manual CEPCI 2007/CEPCI 1998 OAQPS Control Cost Manual company report company report company report OAQPS Control Cost Manual**Boiler Calculations**



### 1.3 Q B 

### = HVm-dot fuel QB = 150000 Btu/lb * 4533.3333 lb/hr QB = 680 mmB tu/hr



### 1.7 CF Plant 

### = actual m fuel

### /maximum m fuel CFPlant = 1.87E+06 lb/y r / 5.96E+06 CFPlant = 31%



### 1.8 CF SNCR 

### = t SCR



### /365 days CFSCR = 365 days/ 365 days CFSCR = 100%

1.6 

### CF Total 

### = CF Plant 

### x CF SNCR CFTotal = 31% * 100% CFTotal = 31%



### 1.9 η NOx

### = (NOx in

### – NOx out

### ) / NOx in ηNOx = ( 0.41 lb/m mB tu - 0.2665 lb/m mB tu)/ 0.41 ηNOx = 35%

**Uncontrolled NOx emissions (tpy) 383** lb/m mB tu**Reagent Calculations** 

### 1.14 NSR = [2NOxin



### – 0.7] η NOx



### / NOxin NSR = ( 2 * 0.41 + 0.7 ) * # / 0.41 NSR = 1.30



### 1.13 Utilizat io n = η NOx



### /NSR Utilizat io n = 27%



### 1.15 m- dot reagent



### = NOxin

### Q B 

### η NOx



### NSR Mreagent



### /MNOx 

### /SRT m-dotreagent = 0.41 * 680 * 35% * 130% * 60.06 / m-dotreagent = 83 lb/hr



### 1.16 m- dot sol

### = m-dot reagent 

### /C sol m-dotsol = 83 / 0.50 m-dotsol = 165 lb/hr



### 1.17 q sol

### = m-dot vol

### /ρ sol qsol = 165 * 7.481 / 71 qsol = 17 gph



### 2.35 Tank Volume = q sol

### t Tank Volume = 17 * 14 * 24 Tank Volume = 5,851 gal2 / 46.01**Direct Capital Cost**



### 1.19 DC = ($950/mmBtu/hr) * Q B 

### (m mBtu/hr)[(2375/mmBtu/hr)/Q DC = 950 $ * 680 *( 2375 / 680 )^ DC = 1,272,833 $
**Inflation Adjustment =** 1.35

DC = 1,718,325 $

### (m mBtu/hr)[(2375/mmBtu/hr)/Q B 

### (m mBtu/hr] 0.577 

### * (0.66 + 0.85* η NOx

### ) 0.577 *( 0.66 + 0.85 * 35% )**Indirect Capital Costs**

**Total Direct Capital Costs, A** Indirect Installation Costs

General Facilities 0.05 Engineering and Hom e Office Fees 0.10 Process Contingencies 0.05 **Total Indirect Installation Costs, B** 0.20

Project Contingency , C = 0.15 **Total Plant Cost D =**

Preproduction Cost 0.02 Inventory Capital **Total Capital Investment TCI = D+G+H**1,272,833 $

A $63,642 A $127,283 A $63,642 A $254,567 (A+B) $229,110 A+B+C $1,756,510 D $35,130 $7,314 +D+E+F+G+H+I $1,798,955 Cost/kW = $26**Annual Costs**



### 2.45 DAC = Annual Maintenance Cost + Annual Reagent Cost + Annual Electricity Cost + Annual Water Cost + Annual Catalyst Cost 2.46 Annual Maintenance Cost = 0.015 TCI Annual Maintenance Cost = 0.015 * 1,798,955 $ Annual Maintenance Cost = 26,984 $ 

### 1.22 Annual Reagent Cost = q sol 

### Cost reagent

### t op 

### 1.22.a t op

### = CF total 

### 8760hr/yr top = 31% * 8760 

### top = 2748 Annual Reagent Cost = 17 * 1.25 * 2748 Annual Reagent Cost = 59,825 $ 

### 1.24 Annual Electricity Cost = Power (Cost elect

### )t op 

### 1.23 Power = 0.47NOxin



### NSRQ B 

### /9.5 Power = 0.47 * 0.41 * 1.30 * Power = 18 kW Annual Electricity Cost = 18 * 2748 * 0.08 Annual Electricity Cost = 3,935 $ 

### 1.27 Annual Water Cost = qwater 

### Cost water 

### t op 

### 1.25 qwater 

### = m-dot sol

### /ρ water 

### [Curea stored 

### /Curea sol inj 

### -1] qwater = 165 / 8.345 *( 50% / 

### qwater = 79 Annual W ater Cost = 79 * 0.0004 * 2748 Annual W ater Cost = 87 $ 

### 1.31 Annual ΔCoal cost = ΔCoal cost coal

### t op 

### 1.28 ΔCoal(Btu/hr) = Hv(Btu/lb)* m-dot reagent 

### (l b/hr)[1/ Curea ΔCoal(Btu/hr) = 900 * 165 *( 1 / 

### ΔCoal(Btu/hr) = 1,338,772 Annual ΔCoal cost = 1.3 * 6.71 $ * 2748 

### Annual ΔCoal cost = 24,688

$

1.32 Annual ΔAsh cost = ΔAsh cost ash 

### t op 

### 1.30 ΔAsh = ΔCoal ash product/HHV ΔAsh = 1 * 77000 / 2E+05 

### ΔAsh = 1 

### Annual ΔAsh cost = 1 *

- $ * 2748 / 

### Annual ΔAsh cost =

-

$

Total Variable Cost = 88,535

$

Total Direct Annual Cost = 26,984 $ + 88,535 $ Total Direct Annual Cost = 115,519 $

### 1.34 CRF = i(1+i) n 

### /[(1+i) n 

### -1] CRF = 0.07 *( 1 + 0.07 )^ CRF = 0.0944 

### 1.33 IDAC = CRF*TCI Indirect Annual Cost = 0.0944 * 1,798,955 $ Indirect Annual Cost = 169,809 $



### 1.35 Total

Annual Cost = Direct Annual Cost + Indirect Annual Cost Total Annual Cost = 115,519

$ + 169,809 Total Annual Cost = 285,327

$



### 1.36 NOx Removed = NOxin 

### η NOx 

### Q B 

### t op NOx Removed = 0.41 * 35% * 680 * NOx Removed = 134



### 1.37 Cost effectiveness = TAC/NO x 

### removed Cost effectiveness = 2,128

$

Greatest dv improvement = 0.7 SNCR Cost effectiveness ($/dv) = 407,611 $ Cumulative dv improvement = 2.15 SNCR Cost effectiveness ($/dv) = 132,710 $

### DAC = Annual Maintenance Cost + Annual Reagent Cost + Annual Electricity Cost + Annual Water Cost + Annual Catalyst Cost

680 / 9.5

10%

- 1 )



### (l b/hr)[1/ Curea sol inj 

### -1]

10%

- 1 )

200020 /(( 1 + 0.07 )^ 20

- 1 )



### Total Annual Cost = Direct Annual Cost + Indirect Annual Cost

**2748** / 2000Mill High (dv) Class I Area Mill PB #1+#2 Acadia NP 3.7 2.8 Great Gulf W A 2.2 1.7 Lye Brook W A 1.0 Moosehorn W A 1.7 1.3 Presidential Range-Dry River W A 2.9 2.3 Roosevelt Campobello IP 1.6 13.1 8.1

PB #1+#2 High (dv) Class I Area 0.7% S WS SCR SNCR Acadia NP 1.9 1.3 1.1 1.4 Great Gulf W A 1.0 0.8 0.7 Lye Brook W A Moosehorn W A 0.7 0.3 0.6 0.6 Presidential Range-Dry River W A 1.3 0.8 1.0 1.1 Roosevelt Campobello IP 4.9 2.4 3.5 3.8Improvement (dv)

0.7% S WS SCR SNCR 0.9 1.5 1.7 1.4 0.7 0.9 1.0

0.6 1.0 0.7 0.7 1.0 1.5 1.3 1.2

3.2 4.0 4.6 4.3