[Bldg-sim] Resfen HVAC type

Carol Gardner cmg750 at gmail.com
Thu Apr 8 17:27:47 PDT 2010


Alex,

With the caveat that I am not a programmer or a developer and with some
trepidation I will say I think I know where you should go at least. The
first part is a programming language, see above, but the last part looks
like DOE2 BDL. It is probably from DOE2.1e since it's from LBNL. So going
way back in the memory banks and scrolling down, down, and further down
there is something labeled:

##if #[Vintage[] eqs New ]
   FHIR=1.3550   CEIR=.3703
##elseif #[Vintage[] eqs Exist ]
   FHIR=1.5015   CEIR=.41667


I'm pretty sure that FHIR is what you want and if my memory serves, a big
if, it represents 1/eff so the first one, age New, would be 79.7%, and the
second one, age Exist, would be 66%. Since this kind of makes sense, I might
be right! If I'm not, hopefully someone who knows more will correct me.

Maybe you can verify this by changing it. I've never used RESFEN myself.

Let me know what happens.

Carol

On Thu, Apr 8, 2010 at 3:46 PM, Alex Krickx <akrickx at seriousmaterials.com>wrote:

>  Hello all,
>
>
>
> I have a question about RESFEN that I’m hoping this list can help me get my
> head around. RESFEN is developed and maintained by LBNL and I believe runs
> off the DOE2 engine. The software is simple to use because of its limited
> inputs, however I want to change one of those restricted inputs.
>
>
>
> I’m trying to change the boiler performance which I *think *I can do by
> editing the building description file (which RESFEN labels as a .d2 file).
> I’ve attached the file and saved it in a .txt format for all to see.
>
>
>
> My question is: Can someone proficient in the DOE2 language help me
> decipher where and how to edit the efficiency of the boiler in the attached
> file? I don’t know the part load, just that the boiler in question operates
> at 60% efficiency. If this is to broad a question please let me know and I
> will attempt to clarify.
>
>
>
> Thanks in advance!
>
> Alex Krickx
>
>
>
>
>
> Alex Krickx
>
> Building Energy Specialist
>
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