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Published byJeffery Emery Modified over 9 years ago
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FUNDED BY THE EUROPEAN COMMISSION S ustainable and C leaner Production in the Manufacturing I ndustries of Pak istan SCI-Pak Mar 2009- Feb 2012
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Lack in knowledge (energy wastages and energy saving potential) Untrained and uneducated human resources Old, inefficient, discarded machines Lack in monitoring aptitude Inefficient in resource consumption (water, chemicals, energy) Improper maintenance and upkeep
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Fuel (Natural Gas) Electricity Water Steam
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More than 30% Reduction in Energy bills 70% 30%
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Reuse of cooling water (compressor, pumps, therm oil heaters, chillers, singeing, jets, kiers) (Savings-Rs. 50,000-100,000/year) Payback 6 to 12 months
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Minimize by increasing temperature
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Fixed O2 Analyzer Portable Stack gas Analyzers Savings 5-10% boiler fuel savings (1% excess oxygen reduction in stack gas saves approximately 1% fuel)
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1 ft 2 heating surface area = 3 kg steam/hr
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Savings-Rs. 100,000/year-leak control Payback 2 months
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Savings-Rs. 4,000-5,000/year-m Payback 6 months
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RO plant for water treatment Water Softening Plant 1 mm thick scale in boiler increases 3 % fuel consumption
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Recovery of heat from hot wastewater (Savings-Rs. 900,000-1,000,000/year) payback 6 months (Also De-scale properly)
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Recovery of heat from exhaust gases of steam boiler, therm oil heaters, generators (Savings-Rs. 1,800,000-2,000,000/year) Payback 6 months
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Every 22 °C reduction in stack gases will increase efficiency of heater by 1% Install Economizer to recover heat from thermal heater stack gases
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Pay Back Less than one year
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Pay back 6-8 months
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Pay Back 7-10 months
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Type, alignment, placement Investment Nominal for repairing Rs. 5,000-20,000 for trap replacement Savings 40,000-50,000 per year per steam trap Pay back 3 months
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Characteristics (FT, IB, TD) Condensate dischargeContinuous Intermittent Energy conservationExcellent Poor Corrosion resistantExcellent Resistance to wearsExcellent Poor Ability to vent airExcellentPoor Handling of startup air loadExcellentFairPoor Operation against back pressureExcellent Poor Performance against light loadExcellent Poor Response to slug of condensateImmediate Delayed Ability to purge systemFairExcellent Failure conditionCloseOpen Dirt handlingPoorExcellentPoor Handling to flash steamPoorFairPoor Resistance to hydraulic shocksPoorExcellent Resistance to freezing damage PoorGood Comparative Physical SizeLarge Small
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Pay Back within one year
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Countercurrent washing sequence (bleaching, mercerization, dyeing etc.) (Savings-Rs. 800,000-1,000,000/year-machine) Payback 1 months
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Reuse of steam condensate as boiler feed water (Savings-Rs. 500,000-600,000/year) Payback 8 months
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Replace T12(40W) Tube Lights with T8(36W) (electronic Chock) Pay Back 5 ~6 Months
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Replace Class III Motors with Class I Motors Payback is 1 ~2 years
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Leakage monitoring and control Immediate Pay back Pressure Optimization Variable Speed Drive (VSD) Pay back 1 year Use cool dry air at suction o 5 o C reduction in suction air temp-1% reduction in power Replacement of piston compressor with screw compressor Small diameter hose for cleaning
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