Consulting-Specifying Engineer - February 2009 - (Page 35)

Equipment Lifecycles from the “out of sight” syndrome, and they remain out of mind until they fail to start, shut down due to overheating, or exhibit other performance issues. For some reason businesses often neglect their gensets. Several genset companies’ distributors do a fair number of retrofits to replace units that would still be in service had they received proper preventive maintenance. How does this play into the process of coordinating a new install or retrofit? If you think preventive maintenance may be neglected, suggest that the owner enter into a service agreement with the distributor from the start. Keep in mind that neglect of a genset can result in liability issues in the event of a genset failure. Armed with appreciation for the big picture, engineers can go back and read the installation manual—section by section, page by page, line by line. Remaining mindful of both the overarching concepts and the finer points will result in a troublefree installation and a satisfied customer. Riemann has worked in the power generation industry for 26 years, and spent the majority of his career working with the aftersales organization. Riemann is actively involved with MTU Onsite Energy in all aspects, where he is a regional account manager. Preventive maintenance should be completed at each preventive maintenance interval. Source: MTU Onsite Energy Corp. keeping the exhaust outlet away from fresh air intakes. Exhaust design instructions are worthy of special attention as there are many opportunities for mistakes. Proper feeding Exhaust can be tricky, but there are plenty of opportunities for error on the intake side of the engine. Fuel system problems occur on gaseous gensets when engineers lose sight of two fundamental needs of the engine: volume and pressure. Problems can arise when the fuel supply is some distance from the engine. As with air flow and exhaust, the diameter of the line and the number of bends must be considered. Depending on the proximity of the components and other factors, a diesel fuel system might have three components. There is a main tank, which must be sized for a certain number of hours at full load, depending on the needs of the customer. There may be a day tank to provide a ready supply of fuel at the injector pump. Day tanks are used when the engine pump does not have the necessary lift to draw fuel from the main tank. If the main tank is above the level of the injectors, the day tank is used to remove the fuel head pressure that would otherwise be placed on the engine fuel system components. If there is a day tank, there also will be a fuel oil transfer pump (auxiliary pump) to supply fuel from the main tank to the day tank. Conclusion One final point in installing a genset is the need for an effective preventive maintenance program. Gensets often suffer ©2009 The Metraflex Co. Arterial clot You don’t need this. Instead, install the CRV® Flex™ before the elbow and flow enters your pump with a flat velocity profile. Lower pressure drops. No diffuser needed. Learn more www.metraflex.com 312-738-3800 Input #214 at csemag.com/quickResponse http://www.metraflex.com http://www.metraflex.com http://www.csemag.com/quickResponse

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Consulting-Specifying Engineer - February 2009 Contents Viewpoint News M/E Roundtable Codes & Standards Electrical Modernization: A Tale of Two Hospitals Retrofitting Office Lighting Controls Case Study New Products Equipment Lifecycles Advertiser Index Green Space

Consulting-Specifying Engineer - February 2009

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