[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

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




Sounds perfect (and consistent with normal design practice and physics)



James V Dirkes II, PE, BEMP, LEED AP
<http://www.buildingperformanceteam.com/>www.buildingperformanceteam.com
Energy Analysis, Commissioning & Training Services
1631 Acacia Drive, Grand Rapids, MI 49504 USA
616 450 8653



From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Jean marais
Sent: Friday, October 12, 2012 3:07 AM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] ASHRAE 90.1 - VAV with reheat will overheat zone at very high ODA





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,
__._,_.___

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

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

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


<http://geo.yahoo.com/serv?s=97476590/grpId=3387488/grpspId=1705007389/msgId=27140/stime=1350029484>

Your email settings: Individual Email|Traditional
<http://groups.yahoo.com/group/EnergyPlus_Support/join;_ylc=X3oDMTJmdDc5dm45BF9TAzk3NDc2NTkwBGdycElkAzMzODc0ODgEZ3Jwc3BJZAMxNzA1MDA3Mzg5BHNlYwNmdHIEc2xrA3N0bmdzBHN0aW1lAzEzNTAwMjk0ODQ->Change settings via the Web (Yahoo! ID required)
Change settings via email: <mailto:EnergyPlus_Support-digest@xxxxxxxxxxxxxxx?subject=Email Delivery: Digest>Switch delivery to Daily Digest | Switch to Fully Featured
<http://groups.yahoo.com/group/EnergyPlus_Support;_ylc=X3oDMTJkdG91aG0xBF9TAzk3NDc2NTkwBGdycElkAzMzODc0ODgEZ3Jwc3BJZAMxNzA1MDA3Mzg5BHNlYwNmdHIEc2xrA2hwZgRzdGltZQMxMzUwMDI5NDg0>Visit Your Group  | <http://docs.yahoo.com/info/terms/> Yahoo! Groups Terms of Use  | <mailto:EnergyPlus_Support-unsubscribe@xxxxxxxxxxxxxxx?subject=Unsubscribe> Unsubscribe

__,_._,___