[Equest-users] Appendix G Baseline Systems 1 and 2 efficiency

[Dahlstrom, Aaron]

Bill:

Your procedure sounds very similar to ours.

Beyond the simple automation of a spreadsheet, and dual monitors to copy data from SIM to XLS quickly, we haven't found any quicker ways to skin this cat.

Aaron Dahlstrom , PE, LEED(r) AP
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From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Bishop, Bill
Sent: Tuesday, May 17, 2011 3:43 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Appendix G Baseline Systems 1 and 2 efficiency

Appendix G Baseline Systems 1 (PTAC) and 2 (PTHP) have cooling efficiencies (and for PTHP, heating efficiencies) that vary with cooling capacity per Table 6.8.1D. Since each thermal block is modeled with its own system, you can end up modeling as many as 100 or more systems per project. For LEED projects (or other App. G models), I have been calculating and manually entering values for cooling EIR for every single system, based on capacities reported in the SV-A reports. I factor in the unique fan power (per G3.1.2.9) for each system and remove its contribution from the efficiency, since fan power is included in EER and needs to be separated per G3.1.2.1. Once you enter efficiency for each system, just about any change you make in the model changes the supply flow rate and/or system capacities, which means you need to redo all the efficiency calculations.

Does this method seem correct?
Has anyone figured out a way to automate this process? (And by "automate", I don't mean give it to the intern.)

Thanks,
Bill

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