[Equest-users] maximum humidity limit
askhanol at asu.edu
Thu Jan 10 18:34:14 PST 2013
Thank you all for your inputs.
Yes, the latent load in the building is very law plus we are not
bringing much OA in the building.
The cooling bypass factor is defaulted but still no change in numbers.
I was not expecting the cooling coil to take care of all the latent
load in the building.
On Thu, Jan 10, 2013 at 2:18 PM, Zheng Ling
<zling at williamsengineering.com> wrote:
> Hi Dave, I feel you go too far. I think the cooling coil will deal with any latent load if it exists and not very big. Setting bigger RH range will not change Energy consumption. Let me know your idea.
> ZHENG LING, P.Eng.
> Williams Engineering Canada Inc.
> 10010-100 Street, Edmonton, AB, T5J 0N3
> T: 780.409.3185 F: 780.425.1520 W: williamsengineering.com
> Engage. Innovate. Inspire.
> Please consider the environment before printing this email.
> Email Transmission Policy
> -----Original Message-----
> From: David Griffin [mailto:dgriffin at etcgrp.com]
> Sent: Wednesday, January 09, 2013 2:29 PM
> To: 'Amruta Khanolkar'; equest-users at lists.onebuilding.org
> Subject: Re: [Equest-users] maximum humidity limit
> I'm glad to hear you are still modeling in eQuest. I hope everything else is going well.
> To address your question, there are several things to consider.
> 1) If your building is not 100% OA, you may want to check your user input latent loads since this humidity will show up in your return air stream.
> 2) Are you modeling your outside air correctly?
> 3) If your building is 100% outside air, your climate may not be humid enough to merit dehumidification.
> 4) I doubt it is this, but make sure your cooling coil bypass factor is defaulted.
> 5) Lastly, consider viewing the following reports to get a better understanding of how your model is dealing with humidity on a system level.
> I hope this helps.
> David Griffin
> Energy Analyst
> ETC Group, LLC
> 801.278.1927 ext. 128
> Cell 480.235.0899
> Fax 801.486.0668
> dgriffin at etcgrp.com
> 1997 South 1100 East, Suite 201, Salt Lake City, UT 84106-4471 - www.etcgrp.com
> CONFIDENTIALITY NOTICE This e-mail transmission, and any documents, files or previous e-mail messages attached to it may contain confidential information that is legally privileged. If you are not the intended recipient or the person responsible for delivering it to the intended recipient, you are hereby notified that any disclosure, copying, distribution or use of any of the information contained in or attached to this transmission is strictly prohibited. If you have received this transmission in error, please immediately notify us by telephone at (801) 278-1927 and destroy the original transmission and its attachments without reading them. Thank you.
> -----Original Message-----
> From: Amruta Khanolkar [mailto:askhanol at asu.edu]
> Sent: Wednesday, January 09, 2013 1:23 PM
> To: equest-users at lists.onebuilding.org
> Subject: [Equest-users] maximum humidity limit
> Hi all,
> I am working on a preservation facility project in eQuest. Because of the specific type of the building, keeping temperature and humidity constant all throughout the year is of high importance. This project also has desiccant system for dehumidification. Due to eQuest's capacity I have modeled the entire building except the desiccant system in eQuest. So right now the dehumidification load is on the cooling coil. The maximum and minimum humidity levels are 45% and 35% respectively. I just wanted to remove the maximum humidity limit (no
> dehumidification) and increase it to 80% or 90% just to study the dehumidification load on the cooling coil. I was expecting the cooling energy consumption to go down compared to the original consumption after I remove/increase the max humidity limit but surprisingly my numbers don't change at all. Am I missing something here?
More information about the Equest-users