We are using the path for the EA Prerequisite 2 (Minimum Energy Performance),Performance Option 1-Streamlined Path) by modeling purchased cooling from an existing District Cooling Plant. Is there a chance we can pass this Prerequisite if the DCS chiller performances are below the baseline efficiencies?
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Tyler Thumma
7GroupLEEDuser Expert
60 thumbs up
October 4, 2022 - 1:32 pm
Absolutely, as achieving the prerequisite depends on many additional factors besides cooling plant performance (envelope improvements, lighting power reductions, service water heating equipment and potential demand reductions, air-side HVAC measures, etc.). However, if the district cooling plant is less efficient than the Baseline I would consider using ASHRAE 90.1-2016 instead of the streamlined path, since the cooling plant would be modeled as neutral purchased chilled water equally in the Baseline and Proposed models.