[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[EnergyPlus_Support] Zone Heating Design Supply Air Temperature Difference is not respected
- To: <EnergyPlus_Support@xxxxxxxxxxxxxxx>
- Subject: [EnergyPlus_Support] Zone Heating Design Supply Air Temperature Difference is not respected
- From: <fpasserini.tn@xxxxxxxxx>
- Date: 19 Feb 2014 01:20:57 -0800
- Delivered-to: mailing list EnergyPlus_Support@xxxxxxxxxxxxxxx
- Delivery-date: Wed, 19 Feb 2014 02:21:01 -0700
- Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoogroups.com; s=echoe; t=1392801658; bh=UMoGtJbCcBL1xTYRXONdpDvM/t9SMQFMlqHDAoIBZ2o=; h=Received:Received:X-Yahoo-Newman-Id:X-Sender:X-Apparently-To:X-Received:X-Received:X-Received:X-Received:X-Received:X-Received:X-Received:To:Message-ID:X-Mailer:X-Originating-IP:X-eGroups-Msg-Info:X-Yahoo-Post-IP:From:X-Yahoo-Profile:Sender:MIME-Version:Mailing-List:Delivered-To:List-Id:Precedence:List-Unsubscribe:Date:Subject:Reply-To:X-Yahoo-Newman-Property:Content-Type; b=OqnOZSxo6Jyjp0t/yZRlljggFrjidtEUPrLDj4o9Z08pKcqGS0YCln/wqwbFnF0ytxwAkYraCOEbXBPXuAWHD3/S3wJM7KicYfFMz1gE+w9dWeQk3W0VvdsuWnDHuTARvyl3n6jD8PpQ03CUL8NglzQJVRI8/AWB1KVFP/fiChY=
- Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=echoe; d=yahoogroups.com; b=PST/izQTzQFQ78qP8ZSFNQrftnrlAg6Islt/4LAIANeqpVfrMcEMTIclqGhwSDI4BxuX7SQJQdNRk3CaJGGN96pbPj0/ikTsW+9YHvRRdGAJkJOhqbmqgPp8NgBSn17otRutR7HMNKkQAs9Ru1DT3O6/xZx1VjSsU5x3LqMRnec=;
- Envelope-to: linda@xxxxxxxxxxxxxx
- List-id: <EnergyPlus_Support.yahoogroups.com>
- List-unsubscribe: <mailto:EnergyPlus_Support-unsubscribe@yahoogroups.com>
- Mailing-list: list EnergyPlus_Support@xxxxxxxxxxxxxxx; contact EnergyPlus_Support-owner@xxxxxxxxxxxxxxx
- Reply-to: EnergyPlus_Support@xxxxxxxxxxxxxxx
- Sender: EnergyPlus_Support@xxxxxxxxxxxxxxx
Iâ??m modeling a baseline system according to Annex G of ASHRAE 90.1-2007. Paragraph G3.1.2.8 states that the â??system design supply airflow rates (..) shall be based on a supply-air-to-room-air temperature difference of 11°Câ??. In the case that Iâ??m modeling there is no outdoor air ventilation. I have imposed that statement through the fields â??Zone Cooling Design Supply Air Temperature Differenceâ?? and â??Zone Heating Design Supply Air Temperature Differenceâ?? of the object Sizing:Zone, as you can see in the following picture: <https://imageshack.com/i/nf55zcj>https://imageshack.com/i/nf55zcj
Iâ??m seeing the output graphs for the design day. Here the zone temperature for the winter design day (the setpoint temperature is equal to 20°C during the diurnal hours and itâ??s met): <https://imageshack.com/i/7gb2q5j>https://imageshack.com/i/7gb2q5j
That zone is conditioned by System 6 ? Packaged VAV with Parallel Fan Powered boxes.
The supply air temperature should be equal to 20°C + 11°C = 31 °C. In the following graph the temperature of the â??Outlet Node Nameâ?? of the object AirTerminal:SingleDuct:ParallelPIU:Reheat is plotted. You can see that that temperature is less than 31°C: <https://imageshack.com/i/0k4d2dj>https://imageshack.com/i/0k4d2dj
On the other hand, the supply air temperature is too high during the summer design day.
Can I consider the model autosized correctly according to Appendix G?
__._,_.___
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=31317/stime=1392801657>
<http://groups.yahoo.com/group/EnergyPlus_Support;_ylc=X3oDMTJldmVnOTVnBF9TAzk3MzU5NzE0BGdycElkAzMzODc0ODgEZ3Jwc3BJZAMxNzA1MDA3Mzg5BHNlYwN2dGwEc2xrA3ZnaHAEc3RpbWUDMTM5MjgwMTY1Nw-->Visit Your Group
* <http://groups.yahoo.com/group/EnergyPlus_Support/members;_ylc=X3oDMTJmaTB1am1oBF9TAzk3MzU5NzE0BGdycElkAzMzODc0ODgEZ3Jwc3BJZAMxNzA1MDA3Mzg5BHNlYwN2dGwEc2xrA3ZtYnJzBHN0aW1lAzEzOTI4MDE2NTc-?o=6>New Members 8
<http://groups.yahoo.com/;_ylc=X3oDMTJkZnE4N2R1BF9TAzk3NDc2NTkwBGdycElkAzMzODc0ODgEZ3Jwc3BJZAMxNzA1MDA3Mzg5BHNlYwNmdHIEc2xrA2dmcARzdGltZQMxMzkyODAxNjU3><http://l.yimg.com/ru/static/images/yg/img/email/new_logo/logo-groups-137x15.png>
? <http://info.yahoo.com/privacy/us/yahoo/groups/details.html>Privacy ? <mailto:EnergyPlus_Support-unsubscribe@xxxxxxxxxxxxxxx?subject=Unsubscribe>Unsubscribe ? <http://info.yahoo.com/legal/us/yahoo/utos/terms/>Terms of Use
__,_._,___