[Bldg-sim] Modeling an UPS (UNCLASSIFIED)

Eurek, John S NWO John.S.Eurek at usace.army.mil
Wed Oct 10 11:14:16 PDT 2012

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Look at the efficiency, this should tell you the amount of energy which turns into heat. The ones I've used in models were somewhere between 95 to 97%.  So a 97% efficient 100KVA would be at a nearly constant load of 3KVA.

I think a UPS is just a giant trickle charger on a battery.

-----Original Message-----
From: bldg-sim-bounces at lists.onebuilding.org [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Camilo Velez :::Green Factory:::
Sent: Sunday, September 30, 2012 10:39 PM
To: bldg-sim at lists.onebuilding.org; EnergyPlus_Support at yahoogroups.com
Subject: [Bldg-sim] Modeling an UPS

Hello all

I'm trying to mdel an UPS (Uninterruptible Power System) but I'm not sure of what would be the power that I should model. The capacity of the UPS is 100KVA, but this capacity will be use only when a "emergency" happens, the rest of the time the UPS will be in some kind of "stand by" mode with the battery full charged, so how much it will consume while it is in this mode?

Thank you.

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