[Bldg-sim] Claiming refrigerated casework savings for a LEED project

[Jim Dirkes]

Dear Forum,
I am modeling a supermarket which has made effort to install refrigerated casework that is more efficient than "normal" in three ways:
*             Casework lighting is LED instead of fluorescent
*             Evaporator fans use ECM motors and are demonstrably more efficient
*             The compressors have higher COP
I did not realize that claiming savings from a "process" load also requires substantiation of the Baseline energy for the process load via comparison to several similar facilities or a published paper.  I wish I knew that months ago!
We have data from three other supermarkets owned by the same company, but these other examples are not identical.  So far, all I can say is that:
a)            Manufacturer literature claims that LEDs used in their casework use ~ 65% less energy than fluorescent lights
b)            ECM fans use about 35% less energy in a manufacturer power comparison table
c)            The COP is better (I do not have detailed data yet)

This strikes me as a fairly weak argument, so I am asking you for suggestions or published data to strengthen the argument.

p.s., My last alternative is to ignore the process energy savings and make it the same for both models.  I think the savings are substantial, however, and would rather find a way to claim them!

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"Attack me ... rather than the path I follow and which I point to anyone who asks me where I think it lies. If I know the way home and am walking along it drunkenly, is it any less the right way because I am staggering side to side?"  Leo Tolstoy

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