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

[CleanTech Analytics]

I think your issue is that Design Builder simple HVAC uses Energy Plus
"ideal loads" HVAC, and that the comparison you are doing requires you to
model an actual HVAC system. Try to use the detailed, or at the least
compact HAVC and see if your problem is solved.

On Tue, Sep 11, 2012 at 6:34 AM, Gupta, Apeksha <GuptaA at bre.co.uk> wrote:

> 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****
>
> Ethos, Kings Road,****
>
> Swansea- SA1 8AS****
>
> *T* +44 1792 630 109* **M *+44 (0) 754 894 3314 *E* Guptaa at bre.co.uk   *W*
> www.bre.co.uk****
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> *MAP:* http://tinyurl.com/brewales****
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