Training Manual on Energy Efficiency - APO Asian Productivity ...

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<strong>Training</strong> <strong>Manual</strong> on Energy Efficiency for Small and Medium Enterprises Table 5-1 is useful for sizing capacitor banks. Table 5-1 Multipliers to determine capacitor KVAR required for power factor correction This table can be used for selecting capacitor ratings. Based on present Power Factor on Y axis and desirable Power Factor on X axis, this table gives the multiplying factor to be applied to measured kilowatt value, to arrive at the rating in kVAr of the capacitor to be installed. - 54 -
5.5 TIPS FOR ENERGY-EFFICIENT ELECTRICAL LOAD MANAGEMENT • Review the tariff agreement with the utility supplier to meet requirements at optimum cost. • Balance kilowatt loads on three phases of supply. • Schedule plant operations to maintain a high load factor. • Shift loads to off-peak times where possible. • Minimize maximum demand by controlling loads through an automatic demand controller. • Stagger start-up times for equipment with large starting currents to minimize load peaking. • Use standby electric generation equipment for on-peak high load periods. • Correct power factor to well above 0.90 by installing additional capacitors and automatic power factor controllers, avoid motor under-load conditions, and take advantage of PF improvement incentives if any are available. • Ensure that all capacitors are in line and functional, by checking charging current. • Relocate transformers close to main loads. • Set transformer taps to optimum settings. • Disconnect primary power to transformers that do not serve any active loads. • Consider on-site captive generation or cogeneration as a cheaper/efficient alternative. • Export power to grid if there is any surplus in captive generation. • Periodically, calliberate the utility’s electricity meter with your own meter for accuracy. • Shut off unnecessary and idle process equipment, utilities, and office equipment like computers, printers, and copiers at night. - 55 - Electrical Load Management
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The opinions expressed in this publ
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7. ENERGY EFFICIENCY IN PUMPS 64 7.
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LIST OF TABLES 1-1 Gross calorific
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6-1 Induction motor 56 6-2 Boosting
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FOREWORD With the rising costs of e
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Annex S. No. Enconomic Opportunity
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