Note: ESA summary data is based on the DOE large plant assessments conducted during 2006 to 2010.

ESA Recommendation ESA Assessment

Type

ESA Opportunity Note IAC ARC Code Implementation Status Source Energy Savings Implemented (MMBtu/yr) Source Energy Savings Percent Implemented (%) Energy Cost Savin

Implemented ($

1.3 ‐ Change Boiler Efficiency Steam Install Feed‐water Economizers 2.2412 Implemented 25,286 5.8% $265,550 

1.3 ‐ Change Boiler Efficiency Steam Boiler currently at 79.3% ‐ to install a continuous trim unit 2.1233 Implemented 17,000 4.5% $136,000 

1.3 ‐ Change Boiler Efficiency Steam The main plant boiler was found to have 77% efficiency. The recommendation is t 2.1212 Implemented 20,000 4.0% $160,000 

1.3 ‐ Change Boiler Efficiency Steam Change Boiler Efficiency (O2 Trim) 2.1233 Implemented 4,987 3.4% $44,000 

1.3 ‐ Change Boiler Efficiency Steam The capability to use number 6‐fuel oil is already installed but is rarely used. Gene 2.1333 Implemented 17,250 3.4% $138,000 

1.3 ‐ Change Boiler Efficiency Steam New Boilers with Economizer, O2 Trim to Reduce Oxygen Content of Flue Gases to 2.1224 Implemented 35,100 3.3% $271,000 1.3 ‐ Change Boiler Efficiency Steam Change Boiler eff. (Burners & Control mods.) 2.1233 Implemented 15,000 2.6% $105,000 

1.3 ‐ Change Boiler Efficiency Steam Change Power Boiler Efficiency ‐ Reduce stack O2 levels by 2% 2.1116 Implemented 94,958 2.4% $245,000 

1.3 ‐ Change Boiler Efficiency Steam Increase boiler efficiency to 79.6% by reduction of excess air from 9.7% to 2%. Th 2.1233 Implemented 3,285 2.1% $27,500 

1.3 ‐ Change Boiler Efficiency Steam Generally, both boilers are in operation because one boiler is not quite large enou 2.6221 Implemented 7,760 1.8% $79,000 

1.3 ‐ Change Boiler Efficiency Steam Improve the quality of the other fuel used in the boiler(s)—No project number 2.1311 Implemented 170,000 1.8% $179,050 

1.3 ‐ Change Boiler Efficiency Steam 2.1233 Implemented 2,628 1.8% $21,471 

1.3 ‐ Change Boiler Efficiency Steam Increase Boiler Efficiency 2.2412 Implemented 11,385 1.7% $98,000 

1.3 ‐ Change Boiler Efficiency Steam Boiler 2 Combustion Air Improvements 2.4323 Implemented 120,000 1.6% $1,200,000 

1.3 ‐ Change Boiler Efficiency Steam Repair and Re‐commission the Economizer Mounted in the Exhaust of the Therma 2.2437 Implemented 19,583 1.5% $235,000 

1.3 ‐ Change Boiler Efficiency Steam Install two combustion air pre‐heaters. 2.121 Implemented 6,144 1.4% $51,000 

1.3 ‐ Change Boiler Efficiency Steam Implement combustion control 2.1213 Implemented 10,870 1.1% $80,000 

1.3 ‐ Change Boiler Efficiency Steam Optimize boiler operation and load management strategy 2.6221 Implemented 68,200 1.1% $498,539 

1.3 ‐ Change Boiler Efficiency Steam Measured excess oxygen was 8.2%. The installation of an oxygen trim system on e 2.1233 Implemented 1,752 1.0% $15,770 

1.3 ‐ Change Boiler Efficiency Steam Install automatic oxygen trim controllers 2.1233 Implemented 17,520 1.0% $177,000 

1.3 ‐ Change Boiler Efficiency Steam All 3 boilers are equipped with stack feedwater economizers. But they are present 2.121 Implemented 6,775 1.0% $58,005 

1.3 ‐ Change Boiler Efficiency Steam 2.1222 Implemented 1,927 1.0% $18,017 

1.3 ‐ Change Boiler Efficiency Steam Change Boiler Efficiency 2.1233 Implemented 14,699 1.0% $162,000 

1.3 ‐ Change Boiler Efficiency Steam Change Boiler Efficiency (Install Economizer on Boiler 3) 2.2441 Implemented 9,536 0.9% $64,550 

1.3 ‐ Change Boiler Efficiency Steam Change Boiler Efficiency – Economizers 2.4232 Implemented 28,851 0.8% $221,000 

1.3 ‐ Change Boiler Efficiency Steam Improve boiler efficiency (reduce EA) 2.1233 Implemented 8,879 0.8% $80,000 

1.3 ‐ Change Boiler Efficiency Steam Boiler tuning. (Pick List #3) 2.1233 Implemented 10,908 0.8% $85,000 

1.3 ‐ Change Boiler Efficiency Steam Combine three boiler operation to two boilers operating at a greater average effic 2.1233 Implemented 4,126 0.7% $42,000 

1.3 ‐ Change Boiler Efficiency Steam The boilers currently maintain the HW heating loop temperature at 270 oF. This p 2.1233 Implemented 20,000 0.7% $199,997 

1.3 ‐ Change Boiler Efficiency Steam Use the least‐efficient of the three boilers less often 2.1211 Implemented 8,640 0.7% $69,000 

1.3 ‐ Change Boiler Efficiency Steam Implement Excess Air (Oxygen) ControlThe Boilers (# 1 ‐ 4) currently do not have 2.122 Implemented 37,250 0.6% $148,900 

1.3 ‐ Change Boiler Efficiency Steam Change Boiler Efficiency (Instrumentation & Controls) 2.1233 Implemented 1,100 0.6% $11,000 

1.3 ‐ Change Boiler Efficiency Steam Change boiler efficiency (Pick List #3): Transfer steam load from 400 psig. boiler to 2.1223 Implemented 18,280 0.6% $133,000 

1.3 ‐ Change Boiler Efficiency Steam Change Boiler Efficiency 2.1233 Implemented 2,496 0.6% $23,000 

1.3 ‐ Change Boiler Efficiency Steam Change Boiler Efficiency ‐ Install Boiler Economizers 2.2412 Implemented 5,151 0.6% $59,780 

1.3 ‐ Change Boiler Efficiency Steam None of the three boilers is equipped with automatic O2 trim. Recent boiler effici 2.121 Implemented 3,504 0.5% $36,000 

1.3 ‐ Change Boiler Efficiency Steam Change boiler efficiency 2.1233 Implemented 38,951 0.5% $109,647 

1.3 ‐ Change Boiler Efficiency Steam Tune boiler controls 2.1233 Implemented 15,552 0.5% $118,000 

1.3 ‐ Change Boiler Efficiency Steam Boiler efficiency – Re‐Calibrate flowmeters & improve control strategy 2.1233 Implemented 4,083 0.4% $49,036 

1.3 ‐ Change Boiler Efficiency Steam Change Boiler Efficiency 2.1233 Implemented 55,188 0.4% $561,000 

1.3 ‐ Change Boiler Efficiency Steam Currently two boilers are in operation, one satisfies the process demand load and 2.1233 Implemented 1,322 0.4% $9,918 

1.3 ‐ Change Boiler Efficiency Steam Tune the boilers especially the Cleaver Brooks boiler. The Superior boilers were ob 2.1233 Implemented 1,112 0.4% $6,000 

1.3 ‐ Change Boiler Efficiency Steam Install New Economizer (four Package Boilers) 2.2412 Implemented 29,419 0.4% $200,000 

1.3 ‐ Change Boiler Efficiency Steam Boiler tuning is necessary maintain proper fuel to air ratios across the operating bo 2.123 Implemented 375 0.3% $3,000 

1.3 ‐ Change Boiler Efficiency Steam Change Boiler Efficiency (CE Boiler Controls) 2.1233 Implemented 20,100 0.3% $151,000 

1.3 ‐ Change Boiler Efficiency Steam Increase Boiler Efficiency to 85% 2.1233 Implemented 2,826 0.3% $24,975 

1.3 ‐ Change Boiler Efficiency Steam Change Boiler Efficiency ‐ Increase combustion air temperature 2.1213 Implemented 2,832 0.3% $15,000 

1.3 ‐ Change Boiler Efficiency Steam Change boiler efficiency (HFB O2 to 2.5%) 2.1233 Implemented 26,992 0.3% $100,114 

1.3 ‐ Change Boiler Efficiency Steam Change Boiler Efficiency – Operating Practice 2.1212 Implemented 14,638 0.3% $146,000 

1.3 ‐ Change Boiler Efficiency Steam Boilers operate more efficiently at lower pressures due to improved heat transfer. 2.1233 Implemented 1,375 0.3% $11,000 
Note: ESA summary data is based on the DOE large plant assessments conducted during 2006 to 2010.

ESA Recommendation ESA Assessment

Type

ESA Opportunity Note IAC ARC Code Implementation Status Source Energy Savings Implemented (MMBtu/yr) Source Energy Savings Percent Implemented (%) Energy Cost Savin

Implemented ($

1.3 ‐ Change Boiler Efficiency Steam Change Boiler Efficiency 2.1233 Implemented 6,572 0.3% $67,000 

1.3 ‐ Change Boiler Efficiency Steam Change Boiler Efficiency – Combustion Controls 2.1233 Implemented 12,709 0.3% $127,000 

1.3 ‐ Change Boiler Efficiency Steam After tuning boiler further improve efficiency by adding parallel combustion contro 2.1233 Implemented 801 0.3% $4,000 

1.3 ‐ Change Boiler Efficiency Steam All four boilers have oxygen trim controls set to maintain approximately 3% excess 2.1232 Implemented 5,520 0.2% $42,600 1.3 ‐ Change Boiler Efficiency Steam Improve the efficiency of boiler #4. 2.1221 Implemented 8,049 0.2% $66,000 

1.3 ‐ Change Boiler Efficiency Steam Based on discussions, it appears that one of the major reasons that two stoker boi 2.1224 Implemented 12,600 0.2% $116,000 

1.3 ‐ Change Boiler Efficiency Steam Combustion air is currently drawn from outside the building. By modifying the duc 2.1213 Implemented 7,059 0.2% $60,000 

1.3 ‐ Change Boiler Efficiency Steam Presently the boilers operate at 20‐25% load with 6.8% of O2 in the flue gases. A n 2.2163 Implemented 1,814 0.2% $13,755 1.3 ‐ Change Boiler Efficiency Steam Replace 250 hp boiler with smaller boiler 2.1223 Implemented 677 0.2% $5,600 

1.3 ‐ Change Boiler Efficiency Steam Change Boiler Efficiency (No. 2 Recovery Boiler) 2.1233 Implemented 15,284 0.2% $103,904 

1.3 ‐ Change Boiler Efficiency Steam Change Boiler Efficiency ‐ O2% Reduction 2.1233 Implemented 6,525 0.2% $49,980 

1.3 ‐ Change Boiler Efficiency Steam Improve combustion efficiency on boilers 2.1233 Implemented 1,314 0.2% $15,279 

1.3 ‐ Change Boiler Efficiency Steam All seven boilers have oxygen trim controls set to maintain approximately 3% exce 2.1233 Implemented 5,000 0.2% $49,996 

1.3 ‐ Change Boiler Efficiency Steam Boiler #2: Improve Combustion Efficiency 2.1233 Implemented 750 0.2% $7,900 

1.3 ‐ Change Boiler Efficiency Steam The economizer piping on the CB350 includes a bypass loop with valving for maint 2.7241 Implemented 580 0.2% $6,000 

1.3 ‐ Change Boiler Efficiency Steam Lower DA tank pressure and temperature to improve effectiveness of the econom 2.2126 Implemented 786 0.1% $8,000 

1.3 ‐ Change Boiler Efficiency Steam Generally, boilers room are warm due to the heat radiated from the boiler shells, t 2.1213 Implemented 1,230 0.1% $10,000 

1.3 ‐ Change Boiler Efficiency Steam Change Boiler Efficiencies on Boiler 8020 2.1233 Implemented 2,522 0.1% $25,014 

1.3 ‐ Change Boiler Efficiency Steam Improve Boiler #1 O2 trim 2.1233 Implemented 1,752 0.1% $19,000 

1.3 ‐ Change Boiler Efficiency Steam All three identical boilers have feedwater economizers that are operating well. Bo 2.1133 Implemented 660 0.1% $6,300 

1.3 ‐ Change Boiler Efficiency Steam The boilers presently operate with a higher level of excess air than is likely necessa 2.1231 Implemented 705 0.1% $6,000 

1.3 ‐ Change Boiler Efficiency Steam Repair boiler refractory 2.1131 Implemented 1,263 0.1% $9,000 

1.3 ‐ Change Boiler Efficiency Steam Burners‐Controls 2.1221 Implemented 813 0.1% $12,000 

1.3 ‐ Change Boiler Efficiency Steam Maintain 3%XO2 with frequent monitoring of stack conditions. 2.121 Implemented 493 0.1% $6,500 

1.3 ‐ Change Boiler Efficiency Steam Change Boiler Efficiency (boiler 5) 2.1233 Implemented 8,271 0.1% $17,122 

1.3 ‐ Change Boiler Efficiency Steam Tune boiler #8 for higher efficiency. (Pick List #3) 2.1233 Implemented 16,294 0.1% $48,000 

1.3 ‐ Change Boiler Efficiency Steam Change Boiler Efficiency (Four Package Boilers) 2.1233 Implemented 5,849 0.1% $39,764 

1.3 ‐ Change Boiler Efficiency Steam Change boiler efficiency (1PB O2 to 2.5%) 2.1233 Implemented 5,859 0.1% $50,198 

1.3 ‐ Change Boiler Efficiency Steam Change boiler efficiency (2PB O2 to 2.5%) 2.1233 Implemented 5,835 0.1% $49,995 

1.3 ‐ Change Boiler Efficiency Steam Boiler Sequencing 3.1191 Implemented 576 0.1% $8,000 

1.3 ‐ Change Boiler Efficiency Steam Change Boiler Efficiency (boiler 3) 2.1233 Implemented 6,979 0.1% $14,446 

1.3 ‐ Change Boiler Efficiency Steam Preheat Combustion Air with High‐Pressure Condensate Implemented 500 0.1% $0 

1.3 ‐ Change Boiler Efficiency Steam Combustion management of boilers 2.2133 Implemented 19,920 0.0% $50,000 

1.3 ‐ Change Boiler Efficiency Steam Improve Boiler Combustion Efficiency – The existing #3 boiler operates continuous 2.1212 Implemented 368 0.0% $3,684 

1.3 ‐ Change Boiler Efficiency Steam Modify boilers to reduce the cost of mixed‐fuel operation for NOx suppression 2.1224 Implemented 0 0.0% $7,885,972