Min Chiller Efficiency

Ciaran McCabe

Director

Passive Dynamics Sustainability Consultants

LEEDuser Basic Member

12 thumbs up

October 5, 2016

I am trying to establish the minimum chillier efficiency we are permitted to use in our PRM model. We have spec'd an air cooled chiller. In terms of understanding the minimum efficiency permitted do we just refer to ASHRAE 90.1 Table 6.8.1C. The baseline chiller in our model will be a water cooled chiller. Are we allowed to use a baseline chiller efficiency that is higher (in terms of COP) than the proposed chiller in our model ? Any feedback here would be great.

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Marcus Sheffer

LEED Fellow

7group / Energy Opportunities

LEEDuser Expert

4454 thumbs up

Wed, 10/05/2016 - 15:02

Yes that sounds like the correct table. Yes you should use the chiller COP for the baseline system even if it is higher than your proposed chiller. You pay a penalty for using a less efficient chiller.