Re:[EnergyPlus_Support] Re: ASHRAE 90.1 - VAV with reheat will overheat zone at very high ODA

[Gloria <bankcommhr@xxxxxxx>]

I don't know either.

Even I don't control the indoor air humidity, the reheat still exist and the reheat consumption is even larger than the heat consumption in winter. (Climate 3A)

I don't know how to explain this.

Jean, any idea?

Gloria

At 2012-10-13 00:40:47,Ooi <ooi_kb3@xxxxxxxxxxx> wrote:

 

Hi,

i do not understand why there has to be a Reheat. i think it wastes energy.

ooi

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Jean marais" <jeannieboef@...> wrote:
>
> Dear group,
> Until now I have used the following interpretation of Appx G.
>
> The supply air temperature to the zone is defined as the "design supply air temperature"..."design" meaning for the design day or worst case. To me this is a maximum, not a constant. Therefore, the reheating coil should try and maintain the room temp, not the outlet coil temp, but the outlet coil temp may not exceed the maximum of the "design supply air temperature". This way you can avoid overheating a room that has very high ODA requirements.
>
> Do you follow?
>
> Regards,
>
> Jean.
>

__._,_.___

Primary EnergyPlus support is found at:
http://energyplus.helpserve.com or send a message to energyplus-support@xxxxxxxx

The primary EnergyPlus web site is found at:
http://www.energyplus.gov

The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/

Attachments are currently allowed but be mindful that not everyone has a high speed connection.  Limit attachments to small files.

EnergyPlus Documentation is searchable.  Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.

Your email settings: Individual Email|Traditional
Change settings via the Web (Yahoo! ID required)
Change settings via email: Switch delivery to Daily Digest | Switch to Fully Featured
Visit Your Group | Yahoo! Groups Terms of Use | Unsubscribe

__,_._,___