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Contact

Mailing Address:

875 Perimeter Dr. MS2281
Moscow, ID 83844-2281

For fire or life threatening emergencies - call 911 from any phone.

For assistance after business hours contact Campus Security at 208-874-7550.

Phone: 208-885-6246

Email: facilities@uidaho.edu

Steam Production Data

Today’s wood boiler performance at the UI Energy Plant is the result of several years of modifications and improvements to the various systems. 2003 brought a change in the management philosophy to the Energy Plant that employed continuous improvement to all the systems and operations. Highlights of those changes are; acid washing the boiler, implementation of VFDs (Variable Speed drives) on all boiler fans and pumps, decreasing the forced draft fans flow, increasing the condensate return and development of a feedback control automation system. Along with the mechanical changes, the operations have improved by an ongoing skills and knowledge development program for the plant staff. In 2010 the university started to see steam demand decreases due largely to the energy saving ESCO program and its numerous building upgrades. The reductions in energy waste and the increased mechanical and operational efficiencies are reflections of the stewardship standards strived for by the Energy Plant and the Utilities and Engineering Services group on campus.

Along with performance improvements, continuous improvement has included Pollution reduction. Since 2003 there has been a steady reduction in pollution from the Energy Plant. Most of the reductions in emissions have come from the decrease in fuel consumed to meet the load demands on campus. Additionally, adjustments and modifications have resulted in cleaner and more complete combustion. Some say that the most elegant engineering solutions are those that improve performance at the least cost. Since money is also a limited resource, improvements had to yield cost savings in order to be considered.

The following tables quantify these improvements, reductions and savings. The first table lists the emissions of the Energy Plant by year beginning with 2002. Using 2002 as the base comparison year, each year’s reduction has been calculated in percent terms and listed in the right three columns.

Steam Production

Learn about the University of Idaho's unique Energy Plant and how we use biomass to produce 90 percent of the steam required by campus.

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Year Tier I Emission (tons) Reduction of Emission from base 2002 (%)
PM CO2 NOx PM CO2 NOx
2002 35.39 76.84 33.57 0 0 0
2003 30.13 65.41 28.57 14.9 14.9 14.9
2004 27.29 59.24 25.87 22.9 22.9 22.9
2005 29.82 64.75 28.28 15.7 15.7 15.8
2006 26.95 58.51 25.05 23.8 23.9 25.4
2007 30.45 66.11 28.87 14 14 14
2008 28.16 54.36 36.61 20.4 29.3 -9.1
2009 17.31 13.55 20.47 51.1 82.4 39
2010 16.17 12.66 15.64 54.3 83.5 53.4
2011 15.49 12.13 38.52 56.2 84.2 -14.7
2012 14.83 11.61 37.29 58.1 84.9 -11.1
2013 15.48 12.11 37.47 56.3 84.2 -11.6
2014 15.31 11.98 37.37 56.7 84.4 -11.3
2015 14.86 11.63 36.8 58 84.9 -9.6
2016 15.75 12.33 32.52 55.5 84 3.1

As you can see from the table above; the particulate matter emissions (PM) have been reduced by more than half and the carbon emissions have reduced by 84 percent. These are significant reductions that help keep our impacts to environmental quality to a minimum. The next table quantifies the steam production in thousands of pounds of steam per year (KPS/Yr), wood fuel consumed in bone dry tons (BDT) and performance in pounds of steam produced per BDT of fuel (PS/BDT); for each year since 2002. Using 2002 as a base year for comparison, the performance increase is listed along with the changing fuel price and the resulting annual fuel costs. The last column uses 2002 as the base performance year and lists the annual cost savings realized as a direct result of the improvements made.

Year Steam from wood
(KPS/Yr)
Wood Consumed
(BDT)
Performance
(PS/BDT)
Performance increase
(%)
Fuel Price
($/BDT)
Fuel Cost
($)
Savings from improvements
($)
2003a 72,896 10,519.43 6,980 0
2003b 120,158 12,054.85 10,218 46.0
2003 193,054 22,574.28 8,552 22.2 30.59 690,547.2 153,098
2004 227,866 22,081.6 10,319 47.4 30.59 675,476.1 320,298
2005 249,037 21,695.42 11,479 64.0 30.59 663,662.9 424,629
2006 225,047 21,111.86 10,660 52.3 30.59 645,811.8 337,643
2007 254,260 21,391.74 11,886 69.8 39.25 839,625.8 586,047
2008 255,988 20,385.7 12,557 79.4 54.5 1,111,021 882,028
2009 292,937 22,374.54 13,092 87.0 59 1,320,098 1,148,943
2010 262,062 20,929.87 12,521 78.9 62 1,297,652 1,023,469
2011 250,819 19,671.74 12,750 82.1 61 1,199,976 985,732
2012 239,471 18,687.53 12,814 83.1 55 1,027,814 853,745
2013 251,279 19,195.6 13,090 87.0 52 998,171.2 868,476
2014 257,587 19,116.64 13,474 93.0 52 994,065.3 924,921
2015 269,598 19,605.28 13,751 97.0 51 999,869.3 969,973
2016 260,037 18,216.93 14,274 104.5 51 929,063.4 970,920
2017 284,680 20,114.18 14,153 102.8 51 1,025,823 1,054,217
Total $ 11,504,141

As you can see from the above table, the campus steam demands have increased until 2009, receded due to energy saving projects, and continued to increase to today. Additionally; the boiler is now able to make more than twice the amount of steam from the combustion of the same amount of fuel, as compared to 2003. Notice that the fuel price has also changed over time. The price change as well as the changing load and performance result in the fuel cost annually. The last column is the savings in money for each year realized due to the improvements made at the Energy Plant independent of the savings due to the energy saving escrow projects completed on the campus buildings.

This is a truly remarkable example of how improvements can be made to energy systems. In this case the U of I was able to significantly reduce the fuel it consumed while reducing pollution emissions, all while saving money.

Contact

Mailing Address:

875 Perimeter Dr. MS2281
Moscow, ID 83844-2281

For fire or life threatening emergencies - call 911 from any phone.

For assistance after business hours contact Campus Security at 208-874-7550.

Phone: 208-885-6246

Email: facilities@uidaho.edu