[Equest-users] Light Shelves

[Demba Ndiaye]

One possibility is to model daylighting as usual and increase the
proportion of your space that benefits from the daylighting as a result
of the deeper light penetration allowed by the shelves.

_____________
Demba Ndiaye

-----Original Message-----
From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Howe,
Timothy
Sent: Thursday, November 20, 2008 5:21 PM
To: Amol Mehta; equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Light Shelves

Not possible as of yet. 

-----Original Message-----
From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Amol
Mehta
Sent: Thursday, November 20, 2008 5:17 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Light Shelves

Hi 

I am trying to model Light Shelves in E-Quest for day lighting. Can you
please help me on this? Thanks


Amol Mehta | Mechanical Engineer | P2S Engineering, Inc.
T 562 497 2999 | F 562 497 2990 | M 858 354 6250 5000 East Spring
Street, 8th Floor, Long Beach, CA  90815 -----Original Message-----
From: equest-users-bounces at lists.onebuilding.org
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equest-users-request at lists.onebuilding.org
Sent: Thursday, November 20, 2008 12:04 PM
To: equest-users at lists.onebuilding.org;
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equest-users at lists.onebuilding.org; equest-users at lists.onebuilding.org
Subject: Equest-users Digest, Vol 8, Issue 22

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Today's Topics:

   1. PIU vs. VAV in eQuest (Matthew Dubrovich)
   2. Re: PIU vs. VAV in eQuest (Kevin Madison)


----------------------------------------------------------------------

Message: 1
Date: Thu, 20 Nov 2008 09:06:50 -0700
From: "Matthew Dubrovich" <mdubrovich at emcengineers.com>
Subject: [Equest-users] PIU vs. VAV in eQuest
To: <equest-users at lists.onebuilding.org>
Message-ID:
	<216F285E03BAC04B9F6E6F17D4C7405E121B6684 at VS6.EXCHPROD.USA.NET>
Content-Type: text/plain; charset="us-ascii"

For those that are on both the BLDG-SIM and this list, I apologize for
the repost...

 

 

Question on PIU vs. VAV systems in eQuest...

 

If a PIU system has only SVAV boxes and all other parameters are
identical, does the PIU act like a VAV in eQuest?  Only changing the
system type in my model seems to have a significant impact on energy
usage and I can't track down why that is.  The difference is significant
enough that with App. G System 7 VAV w/RH, the choice between PIU and
VAV has an effect on the number of points.  Any thoughts would be
appreciated.

 

 

Thanks,

 

Matt

 

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Message: 2
Date: Thu, 20 Nov 2008 09:00:21 -0800
From: Kevin Madison <kevinjm5000 at yahoo.com>
Subject: Re: [Equest-users] PIU vs. VAV in eQuest
To: Matthew Dubrovich <mdubrovich at emcengineers.com>
Cc: equest-users at lists.onebuilding.org
Message-ID: <492597A5.50208 at yahoo.com>
Content-Type: text/plain; charset=windows-1252; format=flowed

Matt -
You may be observing the result of the different default for
"THERMOSTAT-TYPE" for zones served by each system. The default for VAVS
is "REVERSE-ACTION" while it is "PROPORTIONAL" for PIU. Take a look in
the DOE-2 documentation for descriptions of each of these and how this
property affects ZONE terminal unit and SYSTEM operation.
- Kevin

Kevin Madison
Madison Engineering PS
Seattle WA


Matthew Dubrovich wrote:
>
> For those that are on both the BLDG-SIM and this list, I apologize for

> the repost?
>
> Question on PIU vs. VAV systems in eQuest?
>
> If a PIU system has only SVAV boxes and all other parameters are 
> identical, does the PIU act like a VAV in eQuest? Only changing the 
> system type in my model seems to have a significant impact on energy 
> usage and I can?t track down why that is. The difference is 
> significant enough that with App. G System 7 VAV w/RH, the choice 
> between PIU and VAV has an effect on the number of points. Any 
> thoughts would be appreciated.
>
> Thanks,
>
> Matt
>
> ----------------------------------------------------------------------
> --
>
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>   


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