Engineered Systems - August 2008 - (Page 64)

G solutions are available through a nationwide network of Vykon Distributors. ActiveLogix Charlotte, NC 704-578-9776 vykonsales@activelogix.com Advanced Power Control, Inc. Newark, DE 302-368-0443 vykonsales@adv-power.com BITS Waukesha, WI 877-334-9333 vykonsales@envsysinc.com Cochrane Supply Madison Heights, MI 248-588-9260 vykonsales@ cochranesupply.com Controlco Automation Distributors Concord, CA 925-602-7728 vykonsales@controlco.com Control Consultants, Inc. Weymouth, MA 781-335-8353 vykonsales@ controlconsultantsinc.com E.C. Smyers Co. Pittsburgh, PA 412-471-3222 vykonsales@smyers.com Industrial Control Distributors Wanamassa, NJ 732-918-9000 vykonsales@icdmail.com Jackson Control Company, Inc. Indianapolis, IN 800-772-9859 vykonsales@jacksoncontrol.com Long Building Technology Englewood, CO 303-975-2100 vykonsales@long.com Minvalco, Inc. Minneapolis, MN 952-920-0131 vykonsales@minvalco.com Temperature Control Systems, Inc. Dallas, TX 214-343-1444 vykonsales@tempconsys.com Universal Supply Group, Inc. Hawthorne, NJ 973-427-3320 vykonsales@usginc.com MEASUREMENT &VERIFICATION GREEN INTELLIGENT BUILDINGS FIGURE 3. Real-time analysis of a chiller. chiller tains 18 months of live data online and the prior 18 months of historic data offline. After that, data can be archived to other media (tape, CD-ROM, etc.). Data post-processing, using such data integrity capabilities such as CAVEE (customer association, validation, editing, and estimation) for sub-metering and directional flow validation for chiller plant analysis, ensures the quality of presented application data. The system’s basic architecture is shown in Figure 1. The system’s graphical representation and data reporting applications are embedded within the highly secure webpages and presentation server to provide specialized data analysis, reporting, and alarming capabilities. Various levels of entry, from any browser, are provided and data retrieval is “push only” to eliminate internal security concerns in even the most sensitive facility. Figure 2 presents examples of a user’s typical screen views, and Figure 3 illustrates real-time analysis capability. Since every data point can be plotted with a user-defined timeline and up to 20 points of comparison, cost can be analyzed next to comfort and performance data. This allows implementation of cost reduction measures without sacrificing environmental and equipment considerations. Figure 4 is an example of a custom-generated report. COMBINING STRATEGIES Because most building/plant operators are primarily concerned with comfort, it is not unusual to have conditions during which the equipment is over-run, setbacks are manually overridden, or operating schedules are extended. And the results from a number of studies have concluded that energy savings of 5% to 15% can be achieved by implementing August 2008 a continuous datalogging system4,5,6. These savings result from operational improvements, using the captured data to apply advanced control strategies, to recognize interactive effects to reduce simultaneous heating and cooling, to maximize free cooling, to optimize chiller operation to building load conditions, to adjust condenser and evaporator temperatures, to perform dynamic system flow analysis, and to allow retro- and continuous commissioning. It seems logical then to combine an advanced monitoring capability with a method for managing the real-time energy costs — while still delivering a healthy, productive, and comfortable environment. This is accomplished by hosting the data in an operations center staffed by experienced engineers, preferably those having one of the following credentials: certified energy engineer (CEE), certified energy manager (CEM), or certified M&V professional (CVMP), and direct plant operating experience with the types of equipment employed. This operations center should have at least one daily shift of first-level call support and logging capability and 24/7 notice capability; should be capable of providing at least 99.5% uptime and availability; and should be capable of fixing and correcting Level 1 problems and Level 2 and 3 dispatching, recommendations, corrections, and follow-up. The host should also be capable of providing back-up power, on- and off-site storage, and data recovery; Internet security and traffic monitoring with physical access security controls; weather-related failure protection/resolution; and regular updates, error recovery, and e-mail notifications in the event that failures occur. Building oversight management, then, is that combination of computer technology Input 57 at www.esmagazine.com/instantproductinfo 64 ESM05074TridLH.indd 1 En gi neer ed S y stem s 4/13/07 10:20:23 AM http://cochranesupply.com http://controlconsultantsinc.com http://WWW.VYKON.COM http://www.esmagazine.com/instantproductinfo

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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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