Forum discussion
EBOM-2009 EAp2: Minimum Energy Efficiency Performance
A central chiller plant supplies chilled water to our project building and several other buildings. In order to generate the Energy Star report, we are required to input the chilled water energy consumption in Btu.
With reference to the following equation, instead of having the Btu meter directly, would having both a temperature sensor and a flow meter installed on the chilled water suffice?
500 x Flow Rate [gal/min] x Delta T [F] = [Btu/h]
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Michael Opitz
Director of SustainabilityIconergy
60 thumbs up
June 23, 2011 - 7:29 pm
Jason:
In principle that would be fine - LEED does not care how your metering is set up, just that you're measuring (and recording) the energy flowing into your building.
My one suggestion is to ensure that the quality of the metering and data logging is good enough. If you're measuring supply & return temperatures and water flows separately, just make sure you're doing it properly and robustly so you'll get accuracy and precision similar to what a dedicated, unified BTU meter would provide.
Mike