[Bldg-sim] Modelling oil-fired systems with different COPs in Designbuilder (Simple HVAC)

Jim Dirkes jim at buildingperformanceteam.com
Tue Sep 11 10:36:16 PDT 2012


He’s using Designbuilder, so don’t worry!

James V Dirkes II, PE, BEMP, LEED AP
www.buildingperformanceteam.com<http://www.buildingperformanceteam.com/>
Energy Analysis, Commissioning & Training Services
1631 Acacia Drive, Grand Rapids, MI 49504 USA
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From: bldg-sim-bounces at lists.onebuilding.org [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of John Aulbach
Sent: Tuesday, September 11, 2012 1:05 PM
To: Gupta, Apeksha; bldg-sim at lists.onebuilding.org
Subject: Re: [Bldg-sim] Modelling oil-fired systems with different COPs in Designbuilder (Simple HVAC)

Please give us your .INP and .PD2 files. How you can run oil in a "simple" HVAC model is beyond me. You cannot be in the Wizard.

John R. Aulbach, PE, CEM
Senior Energy Engineer
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________________________________
From: "Gupta, Apeksha" <GuptaA at bre.co.uk<mailto:GuptaA at bre.co.uk>>
To: "bldg-sim at lists.onebuilding.org<mailto:bldg-sim at lists.onebuilding.org>" <bldg-sim at lists.onebuilding.org<mailto:bldg-sim at lists.onebuilding.org>>
Sent: Tuesday, September 11, 2012 6:34 AM
Subject: [Bldg-sim] Modelling oil-fired systems with different COPs in Designbuilder (Simple HVAC)

Hello All,
I’m trying to compare two oil boilers with different COPs. One is 55% efficient and the other 82% efficient. I’m using the Simple HVAC model, however the results for Zone heating (kWh) do not change for the two boilers. All other parameters of the building remain the same. One would expect the lower efficiency boiler to perform more leading to a higher energy consumption to a higher efficiency boiler. Has anyone come across this in simulations? Can’t understand what I am doing incorrectly.

Regards,
Apeksha

Apeksha Gupta MSc
Renewable Energy KTP Associate
BRE Wales & South West
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