Engineered Systems - August 2008 - (Page 72)

EfficiencyIncentives (Continued from page 20). Full-load Motor Efficiency (%) Horsepower Energy Efficient Motor 89.5 92.4 93.0 94.5 95.0 NEMA Premium Efficiency Motor 91.7 93.6 94.5 95.4 96.2 Annual Savings from Use of a NEMA Premium Motor Annual Energy Savings, kWh 1,200 1,553 3,820 4,470 11,755 Dollar Savings $/year $60 78 191 223 588 10 25 50 100 200 Note: Based on purchase of a 1,800 rpm totally enclosed fan cooled motor with 8,000 hrs/yr of operation, 75% load, and an electrical rate of $0.05/kWh. TABLE 1. Annual savings from specifying NEMA Premium motors. (Table courtesy of the DOE.) from standalone motor rebate programs to a more comprehensive mix of program approaches such as adjustable-speed drives and motor management services.” It also cites an increased number of offered measures; in some cases, they are bundled under one umbrella program. The CEE reports that many of its member utilities are seeking to work collaboratively with vendors, and that program administrators are placing greater emphasis on both customer and vendor education. The Motors Decisions Matter website at www.motorsmatter.org, features a report prepared by the CEE titled “Premium Efficiency Motors and Adjustable Speed Drives in the US and Canada, May 2007.” This document features dozens of energy-efficiency programs that promote premium-efficiency motors, motor management, motor systems optimization, and/or ASDs in both industrial and commercial facilities. The report also includes a helpful appendix containing an overview of program types and related terminology. There, the reader will find explanations of prescriptive, new construction, custom, and standard performance contract programs as well as insights into technical and financial assistance, and education and awareness initiatives. DRIVING TOWARD SAVINGS In some situations, adding an ASD is a more sensible solution than just replacing the motor with a more efficient model. Drives are generally suggested for motor and load systems that deliver rated output less than 40% of the time, or where the average output is less than 60% of the rated output. In addition to saving energy, drives can offer greater control over motor speed, which can prolong motor life and reduce maintenance costs. Drives can also increase productivity by empowering more precise control of process operations, which can result in higher product quality. In certain applications, the installation of drives can enable load-shedding strategies that can benefit from demand-response programs, which are playing an increasingly important role in maintaining grid reliability in the face of steadily growing electricity demand. The Database of State Incentives for Renewables & Efficiency (DSIRE) website at www.dsire.org is one of many sources to consult when seeking financial incentives for energy-efficient motors and drives. DSIRE is an ongoing project of the North Carolina Solar Cen72 En gi neer ed Sy stem s August 2008 Some ASD rograms Some ASD programs go even g even furth further and require that any the and requi her equir h t any y exi ting th ottling existing throttling device isti is g hr tlin hrot vice i (e g nlet van bypass damper (e.g., inlet vane, bypass damper, l ane ypas damper, or throttling valve) be removed or permanently disabled before the drive incentive is paid. ter and the Interstate Renewable Energy Council (IREC) funded by the DOE. As its name suggests, the database includes both renewable and energy-efficiency incentives and can be searched by state, eligible sector, implementing sector, incentive type, or technology. Finding one or more potential funding options on DSIRE or any other website is just the first step — it’s also important to do the necessary homework to make sure the proposed upgrade will actually qualify for an incentive. In the case of ASDs, for example, programs typically limit incentive eligibility to certain horsepower motors, minimum operating hours, and/or minimum estimated energy savings per year. Some programs go even further and require that any existing throttling device (e.g., inlet vane, bypass damper, or throttling valve) be removed or permanently disabled before the drive incentive is paid. Whether a facility contains thousands of motors or just a handful, it pays to stay up-to-date on ways to improve motor-system efficiency and any incentives that might be available to help you do so. ES Bringing the perspective that comes with more than 20 years in commercial real estate and 15 years in energy efficiency, Jewell, founder and president of RealWinWin is a national expert of the role of energy-efficiency economics in commercial real estate. Reach him at mjewell@realwinwin.com. http://www.motorsmatter.org http://www.dsire.org

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Engineered Systems - August 2008 Contents Editor's Note Back2Basics HVAC Challenge Case In Point Commissioning Building Automation Efficiency Incentives HVACR Designer Tips Glass Box to Grand Casino Looking Radiant In Green Mechanical Products Sourcebook Q&A: Dehumidification In Schools Building Oversight Management: M&V And More Products Classifieds Advertiser Index Tomorrow's Environment

Engineered Systems - August 2008

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