[EnergyPlus_Support] Re: Ventilation sistem without return air

["natasamdj" <natasamdj@xxxxxxxxxxx>]

Hi Elmer,
Before few days I asked you about Heat Recovery in EnergyPlus. I 
understood what you said to me. But still I cannot run the model. I 
have some questions:
1. Should HEAT EXCHANGER:AIR TO AIR:GENERIC be listed in the Inlet 
Air Branch and also in the Exhaust Air Branch? I think that it 
should be, and i set it the the Branch list,but I have gotten in 
error file the answer that it is "Invalid Component Type input".
2. I understood you about that everything in E+ is some kind of 
loop. But how I should deal with exhaust fan? I have supposed to 
have two fans, one for Inlet Air and another one for Exhaust Air.

Thank you in advance

Best wishes

Natasa M.Djuric 
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Elmer Morrissey" 
<elmofuddly@...> wrote:
>
> Hi Natasa
> 
> I ran into this problem a few weeks back... it's quite easy to fix.
> Everything in EnergyPlus is set up in loops. So all you have to do 
is
> set up your air loop to `look' like another typical loop.
> 
> The loop will resemble a situation where the return air is fed
> straight into the supply fans etc. However, you attach an Outside 
Air
> System to the beginning of this loop along with a rotary wheel
> (examples can be found bundled with E+). All you have to do now is
> force the air to not mix by setting the minimum and maximum outside
> air intake in the Outside Air Controller to be the same level. If 
you
> do this, you will get no mixing of the return and fresh air. 
> 
> Note: if you want to bypass the thermal wheel in certain 
conditions,
> this is controlled from the OA controller too. It is well 
documented
> in the input/output reference (something I missed at the time!!!!)
> 
> Hope this helps.
> 
> Kind regards
> 
> -Elmer
> 
> 
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "natasamdj" <natasamdj@>
> wrote:
> >
> > Dear,
> > I am trying to develop the model of ventilation with heat 
recuperation 
> > but without mixing with the return air. I am planning to apply 
the 
> > rotating heat exchanger. My problem is because everywhere in 
Energy 
> > Plus for defining the air path, there are fields for return air. 
The 
> > exhaust air from the zone should be forced through rotating heat 
> > exchanger. I do not want to have air mixing of outside air and 
exhaust 
> > air. But everywhere in Energy Plus there are the fields for 
return 
> > air. I passed through some of examples from new version 1.2.3, 
but I 
> > could not find the example about that.
> > 
> > Please can you give me some advice how to model the ventilation 
> > without air mixing? I will continue to work on it, and maybe I 
will 
> > have some more specific question in future.
> > 
> > Thank you in advance
> > 
> > Natasa M.Djuric
> >
>







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