[Equest-users] Does PTAC consumes less energy than FCU+DOAs?

[deepika khowal]

the mostly common heating system for PTAC is generally heat pump with
electric backup.when I did modeling for it, the fan energy consumption was
very high.
Regards
Deepika

On Mon, Dec 13, 2010 at 7:40 AM, Bruce Easterbrook <bruce5 at bellnet.ca>wrote:

> On your bottom screen adjust the throttling range, try 2 and 4.  .3 is too
> tight, the system will fight itself.
> Bruce Easterbrook
> Abode Engineering
>
> On 13/12/2010 08:52 AM, zhiren zhou wrote:
>
>   Dear all
>
>        Now I’m doing a LEED-CS energy simulation, part of the project is
> residential type and I use system 1(PTAC), and the proposed is FCU+DOAs. The
> results shows that the baseline is consume less energy.
>
> So the question is: Does PTAC consumes less energy than FCU+DOAs?
>
> Of course I’m not sure whether I has modeled the PTAC correctly. So I put
> some important images below. The cooling source is DX and the heat source is
> hot water loop. The supply fan is 0.0003Kw/CFM, and I keep the EIR default
> of 0.438 which is a low efficiency.
>
> Could anyone tell me the cause or the mistake I’ve made? Thanks a lot!
>
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>                              Yours  Zhiren Zhou
>
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-- 
Deepika Khowal, LEED Green Associate
Energy Engineer, Soladigm Inc.
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