We are doing certification for a beverage factory. The factory requires chilled water for process load that is served by 2*1080 kW Evaporatively cooled Screw chillers. The same serves for air conditioning also. My baseline system is system 6 - PVAV. Modeling baseline case for process is confusing since the process load requires 1200 kW of cooling.
1.If two chillers run to meet the process load alone with VAV system serving for HVAC then my energy consumption in baseline goes very high resulting in unreasonable energy savings.
2.We have modeled to one chiller of 1200 kW to meet the process load and system 6 to cater HVAC load in the baseline. Is this good enough.
If not how do I model or kindly suggest related interpretations or sources for the same.
Thanks in advance.
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Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5907 thumbs up
December 4, 2016 - 3:36 pm
Your approach sounds reasonable. You should able to justify the amount of cooling needed for process and the amount needed for space conditioning and be able to demonstrate that the process load has been modeled identically. The modeling output should show the energy use associated with each as a separate line item.