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NC-2009 EAc5:Measurement and Verification

Measurement and Verification for two building campus (metering)

Hello. We are currently working on a project for which the LEED boundary includes everything in the campus like a bus maintenance facility and offices, except an office/garage hybrid building next to this one. However there are two chillers and two boilers that serve both buildings. We are having an issue defining how to sub-meter this for the M&V. We will be providing temp sensors and flow sensors connected to a BMS at the AHUs corresponding to the LEED boundary areas. But my main question would be, does the sub-meter have to be assigned per parameter or output of the energy model to be calibrated or does it have to be per energy source? The reason I'm asking is because we have some circuits that are together (lets say some plug loads and some lighting) and pretty difficult to sub-meter by function within the circuit. What type of report is required after calibration. Is there an example? Thanks.

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Tue, 04/01/2014 - 13:47

In order to calibrate an energy model you need to measure energy use by end use. Fuel type can work if there is only one or two end uses associated with it. This does not mean that you need permanently installed submeters in every case. We once did calibration on a small library with no submeters. The measurements were all spot measurements and short term trending meters. For example, in the case where the lighting and plug loads are on the same circuit you could submeter it and then figure out a way to determine the lighting portion (perhaps spot measurements of the power draw of the lighting fixtures attached to that circuit) and subtract that from the total to separate the end uses. Use the lighting data to calibrate the lighting energy use and the plug load data to calibrate the plug load energy use. In order to effectively calibrate an energy model you need to calibrate it by end use on a monthly basis. Effective submetering goes back to designing the layout of the panel boards so this process should start early in design.

Tue, 04/01/2014 - 22:19

Do you know whwere can we find an example of the report to be submitted by the end of the measurement and verification period? Thanks.

Wed, 04/02/2014 - 13:44

Your can find a couple of examples of our M&V reports on our web site at http://www.sevengroup.com/r-project-reports/energy/mv-reports/ You could also try - http://www.evo-world.org/index.php?lang=en

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