ENERGY SAVINGS AND EMISSION REDUCTIONS IN INDUSTRIAL BOILERS

Abstract

In this paper energy use of boiler fan motors has been estimated using energy audit data. Energy savings using VSD by modulating fan speed has been estimated as well. Bill savings and associated emission reductions using VSD have been estimated and presented in this paper. It has been found that 139,412MWh, 268,866, 159,328MWh, and 99,580 MWh electrical energy can be saved for 40%, 60%, 80% and 100% motor loadings, respectively for 60% speed reduction. Corresponding bill savings for the aforementioned energy savings have been found to be US$7,318,335, US$14,113,933, US$8,363,812, and US135,911,944 for 40%, 60%, 80% and 100% motor loadings, respectively for 60% speed reduction. Along with energy savings, 69,770,744 kg, 134,558,329 kg, 79,738,065 kg, 49,836,603 kg of CO2 emission can be avoided for the associated energy savings as a result of energy savings using VSD for 40%, 60%, 80% and 100% motor loadings. Morever, 32,503,558 GJ of fossil fuel can be saved for the flue gas temperature reduction as a result of reducing fan motor speed reduction. Flue gas energy savings for oxegen trim system has been estimated and found to be 549,310,130GJ for 16.9% of excess air reduction with payback period less than a day.

Keywords

Dates

  • Submission Date2009-10-14
  • Revision Date2010-03-17
  • Acceptance Date2010-07-20

DOI Reference

10.2298/TSCI091014046S

References

  1. Einstein D, Worrell E, Khrushch M, Steam Systems in Industry: Energy Use and Energy Efficiency Improvement Potentials, Lawrence Berkeley National Laboratory, Available at: www.osti.gov/bridge/servlets/purl/789187-uTGqsP/native/, 6/09/09
  2. Energy information administration (EIA). International energy annual, online, retrieved 3rd January 2009 from www.eia.doe.gov/iea 2007
  3. ERC, How to save energy and money in boilers and furnace systems, Energy Research Centre (ERC), University of Cape Town, South Africa. 2004
  4. Živkovic N. V., Cvetinovi D. B., ERI M D., and Markovi Z. J., numerical analysis of the flue gas-coal particles mixture flow in burner's distribution channels with regulation shutters at the tpp nikola tesla - a1 utility boiler, Thermal Science: 14 (2010), 2, pp. 505-520
  5. Dvornik J, Tireli E, and Dvornik S, Analysis of the performance of the ship steam boilerUsing simulation, Thermal Science: 13 (2009), 4, pp. 11-20
  6. Burdukov A.P., Popov V. I., and Faleev V. A., Study of mechanically activated coal combustion, Thermal Science: 13 (2009), 1, pp. 127-138
  7. Saidur R, Sattar MA, Masjuki HH, Abdesselam H, Shahruan BS, Energy and exergy Analysis in utility and commercial sectors of Malaysia, Energy Policy, 35 (2007), 3 pp. 1956-1966.
  8. Saidur R, Ahmed JU, Masjuki HH, Energy, exergy and economic analysis for industrial boilers for Malaysia, Energy Policy, 38 (2010), 5, pp. 2188-2197.
  9. Mahlia T.M.I, Masjuki H.H., and. Saidur R., Cost benefit analysis of implementing minimum energy efficiency standards for household refrigerator-freezers in Malaysia, Energy policy, 32 (2004), 16, pp. 1819-1824.
  10. Mecrow B.C., and Jack A.G,. Efficiency trends in electric machines and drives, Energy Policy 36 (2008), 4336-4341
  11. www.emeraldenergy.ie/info/boiler-efficiency.htm, 30/08/2009
  12. Saidur R., A review on electrical motors energy use and energy savings, Renewable and Sustainable Energy Reviews, 14 (2010), 3, pp. 877-898.
  13. Carpenter K, Kissock KD'Antonio, M,, Common Excess Air Trends in Industrial Boilers with Single-Point Positioning Control and Strategies to Optimize Efficiency, 2007 ACEEE Summer Study on Energy Efficiency in Industry
  14. Colak. I, Bayindir R., Sefa I., Experimental study on reactive power compensation using a fuzzy logic controlled synchronous motor, Energy Conversion and Management 45 (2004), 15-16, pp. 2371-2391.
  15. Kilicaslan I, Ozdemir E. Energy Economy With a Variable Speed Drive in an Oxygen Trim Controlled Boiler House, Journal of Energy Resources Technology-Transactions of the ASME, 127 (2005), pp. 1-7.
  16. Anon. Ways to Save on Motor Energy Costs, 2008,www.aps.com/main/services/business/WaysToSave/BusWaystoSave_16,(2008) Downloaded on 28/11/2008
  17. Nesbitt L, The impact of industry characteristics on the diffusion of adjustable speed motors across manufacturing industries, MA thesis University of Denver, USA 2008
  18. Yu F.W., and Chan K.T., Environmental performance and economic analysis of all-variable speed chiller systems with load-based speed control, Applied Thermal Engineering 29 (2009), pp. 1721-1729
  19. www.powerqualityanddrives.com/payback_analysis_vfd/,30/08/09
  20. www.energy.ca.gov/process/pubs/vfds.pdf, 30/08/09)
  21. Mahlia TMI, Emissions from electricity generation in Malaysia. Renewable, Energy 27, (2002), pp. 293-300.
  22. Saidur R, Rahim N.A, Masjuki H.H, Mekhilef S, Ping H.W. and Zamaluddin M.F, end use energy analysis in the Malaysian industrial sector, Energy, 34 (2009), 2, pp.153-158.
  23. Saidur R, Energy, economics and environmental analysis for chillers in office buildings, Energy Education Science and Technology Part A: Energy Science and Research, 25 (2010), 1, pp. 1-16.
  24. Audit report, A detailed study on consumer behaviour towards electricity consumption and end uses of electricity in the industrial sector, Tenaga Nasional Berhad, Malaysia 2007
  25. Ozdemir E, Energy conservation opportunities with a variable speed controller in a boiler house, Applied Thermal Engineering 24 (2004), pp. 981-993
  26. Bayindir R., Sagiroglu S.,, Colak I., "An intelligent power factor corrector for power ystem using artificial neural networks" Electric Power Systems Research (2009), pp. 52-160
  27. Jayamaha L. Energy efficient building systems: green strategies for operation and maintenance. McGraw Hill Book Company. 2008
  28. Christina G and Worrell E, Energy Efficiency Improvement and Cost Saving Opportunities for the Vehicle Assembly Industry, 2008, LBNL-50939-Revision.
  29. Lönnberg M, Variable Speed Drives for energy savings in hospitals, World Pumps, November 2007.
  30. Beggs C., Energy Management and Conservation, Elsevier Ltd. 2002
  31. Sonia S, and Rubin E.S.. A centurial history of technological change and learning curves for pulverized coal-fired utility boilers. Energy 32 (2007): pp. 1996-2005.
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