[Bldg-sim] LS-B Report Problems

[Jeff Haberl]

Hello Shana,

The LS-B report in eQuest is a carry-over from the original DOE-2 program when there were separate LOADS, SYSTEMS, PLANT and ECONOMICs input files. Therefore, since this report has a "LS" attribute it is reporting the calculated peak loads for the space "AGL1-1-PROCESS-1", whatever that is. 

Without knowing anything about your building I would suspect that what you are seeing is correct, there are no heating loads for this space, this is why it is reporting none. This can occur when the thermostat is set too low, and/or for other reasons. For example, it appears that you have enormous equipment and process internal loads to the space which are more than likely heating it.

Unfortunately, diagnosing this usually requires a look at the input file to see what's in the space, what's shut-off, and/or what sort of building/process you are trying to simulate. One simple solution is to tinker with the heating setpoint until you see at what point the heating appears. This will give you some idea of what's going on, althought it won't solve the problem.

Also, don't forget that the LS-B is only reporting the loads on the systems, and not the system loads or the plant loads, which requires further diagnostics.

Jeff

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Jeff S. Haberl, Ph.D.,P.E.,FASHRAE,FIBPSA,........jhaberl at tamu.edu
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________________________________________
From: bldg-sim-bounces at lists.onebuilding.org [bldg-sim-bounces at lists.onebuilding.org] on behalf of Shana Scheiber [sscheiber at aeieng.com]
Sent: Friday, January 10, 2014 8:16 AM
To: John Aulbach; bldg-sim at lists.onebuilding.org
Subject: Re: [Bldg-sim] LS-B Report Problems

To clarify,

Here is a screen shot of one of the zones.  Cooling load is calculating, heating load is not calculating.

Any thoughts would be much appreciated.  Thanks!

Shana Scheiber
Sustainable

AEI | Affiliated Engineers
5802 Research Park Boulevard | Madison, WI 53719
P: 608.441.6670 | F: 608.238.2614
sscheiber at aeieng.com  |  www.aeieng.com




-----Original Message-----
From: John Aulbach [mailto:jra_sac at yahoo.com]
Sent: Thursday, January 09, 2014 5:36 PM
To: bldg-sim at lists.onebuilding.org; Shana Scheiber
Subject: Re: [Bldg-sim] LS-B Report Problems

Is it possible you are not scheduling your heating ON with thermostat setting and fan ON?

----------
Sent from AT&T's Wireless network using Yahoo! Mail

------Original Message------
From: Shana Scheiber <sscheiber at aeieng.com>
To: "bldg-sim at lists.onebuilding.org" <bldg-sim at lists.onebuilding.org>
Date: Thursday, January 9, 2014 8:53:23 PM GMT+0000
Subject: [Bldg-sim] LS-B Report Problems

Dear Modelers,

The "LS_B Space Peak Load Components" report in eQuest is giving me unusual results.  The Heating Load components are all zero kBtu/H when there is absolutely heating load.  This is happening in a number of zones; although not all.  Happening on multiple systems as well.

Does anyone have any experience with this report giving unexpected results?  How can I get this report to work for me?

Thank you!
Shana Scheiber  CEM, LEED(r) AP, PE
Sustainable



AEI | AFFILIATED ENGINEERS, INC.
5802 Research Park Boulevard | Madison, WI  53719

P: 608.441.6670 | F: 608.238.2614
sscheiber at aeieng.com<mailto:sscheiber at aeieng.com>  |  www.aeieng.com<http://www.aeieng.com>




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