[EnergyPlus_Support] Re: Ventilation sistem without return air

["Elmer Morrissey" <elmofuddly@xxxxxxxxx>]

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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