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FLEXO Magazine : March 2009
PLANTS & PROCESSES Many facilities are already equipped with back-up generation due to the operating requirements of the business. Hospitals, for ex- ample, have back-up generation to ensure constant power regard- less of emergencies or system failures. HVAC UPGRADES In many facilities, HVAC (heating, ventilation and air condition- ing) controls are simple on/off devices which cycle compressor systems based on room temperature. Mechanical systems can suf- fer and be inefficient because of overshooting and undershooting of this type of control. New technologies allow for closer control of the cooling medium and better utilization of the equipment. Upon startup, the cooling fluid at the compressor is at its high- est density-the higher the density, the better the heat transfer and the higher the efficiency of the compressor. Pulse-type con- trol systems allow for the sensing of the control valve position and maintain the higher density without affecting the operation of the compressor. A side benefit of this type of operation is de- mand shaving and better operating points for the mechanical equipment and therefore less maintenance. LIGHTING UPGRADES Depending on the facility, lighting costs can comprise 30 per- cent of the electricity bill. To reduce costs, a company can retrofit or change standard light bulbs to higher-efficiency light bulbs. Lighting technology continues to provide improvements; retrofits that were completed as little as five years ago can benefit from today's upgrades. A complete lighting retrofit can reduce the lighting electricity consumption by up to 50 percent resulting in a substantial reduction in energy expenses. There are initial costs for a full lighting retrofit. Expenses typically range from $1 to $2 per square foot. Often the light- ing designer or retrofitter will help to finance these costs. Total costs and payback periods depend on the size of the facility, local electricity costs ($fkWh), hours of operation, and the types and number of new lighting products installed. Payback periods range from 12 to 36 months in most instances. Benefits of lighting retrofits include cost savings, enhanced room ambiance and comfort, lower air conditioning costs (which also reduce energy costs), and reduced maintenance and replace- ment costs. The newer, high efficiency bulbs have burn lives that can be three times as long as older products. SUMMARY There are many ways companies can reduce and control en- ergy costs in order to be more competitive and environmentally sensitive. Consider the positive effect an energy audit or a light- ing retrofit can have on your profits. The application of effective energy practices can create significant savings to any company whether small or large. . ABOUT THE AUTHOR: Kathy Kiernan is senior vice president for Affiliated Power Purchasers International LLC (APPI), an indepen- dent utility consultingfirm that helps businesses reduce and manage energy expenses. She can be reached at email@example.com. View more at www.appienergy.com. TI[ill JUD V@U @@ W wOIJ@UD@DO 2009 Continuous Improvement Conference April 5-8, 2009 · Lexington, Kentucky PHI NIl NG Featuring Tuesday with Toyota and a Tour of Toyota Motor Manufacturing Kentucky (TMMK) INDUSTRIES OF AMERICA I Advancing Graphic Communications
Sustainable Winter 2009