Energy Efficiency Opportunities
{"Image DocumentName": "Energy Efficiency Opportunities", "Image ImageDescription": "8. Scaling and Soot Loss Reduction. Every 22oC increase in stack temperature = 1% efficiency loss. 3 mm of soot = 2.5% fuel increase. Thermal Equipment/ Boilers. 9. Reduced Boiler Steam Pressure. In oil and coal-fired boilers, soot buildup on tubes acts as an insulator against heat transfer. Any such deposits should be removed on a regular basis. An estimated 1per cent efficiency loss occurs with every 22oC increase in stack temperature. Therefore, stack temperature should be checked and recorded regularly as an indicator of soot deposits. It is also estimated that 3 mm of soot can cause an increase in fuel consumption by 2.5per cent due to increased flue gas temperatures. Periodic off-line cleaning of radiant furnace surfaces, boiler tube banks, economizers and air heaters may be necessary to remove stubborn deposits. (click once) Reduction of boiler steam pressure is an effective means of reducing fuel consumption by as much as 1 to 2 per cent. Lower steam pressure gives a lower saturated steam temperature and without stack heat recovery, a similar reduction in the temperature of the flue gas is obtained. Steam is generated at pressures normally dictated by the highest pressure and temperature requirements for a particular process. Lower steam pressure. = lower saturated steam temperature. = lower flue gas temperature. Steam generation pressure dictated by process. \u00a9 UNEP 2006.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}