[Equest-users] -nan Error

[Brett Fero]

Omer,

I believe this may be occurring because eQuest is trying to use equipment performance curves beyond their valid limits.  Check for warnings in your sim file.

Brett Fero, P.E., LEED AP
Syracuse, NY 13212

-----Original Message-----
From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of omoltay at mimtarch.com
Sent: Tuesday, February 09, 2010 8:03 AM
To: Bishop, Bill; equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] -nan Error

Well, sorry to skip from problem to problem, being under time pressure
makes you dizzy :)

Actually, I thought I had solved the "capacity" warning by adding thermal
storage. Indeed, the warnings disappeared after the addition of a thermal
storage that charges and discharges from the two-pipe primary loop. But
now, I get these -nan's in the reports.

I will definitely let you know when I solve it. Nobody here knows what
even -nan stands for? (not available something??)

Thanks,



> Hmm. Okay. Well, let us know if you figure it out. I've never modeled
> thermal storage. Is the thermal storage added to your two-pipe secondary
> loops(s)? If so, maybe that causes the "capacity" warning.
>
>
> -----Original Message-----
> From: omoltay at mimtarch.com [mailto:omoltay at mimtarch.com]
> Sent: Tuesday, February 09, 2010 7:53 AM
> To: Bishop, Bill
> Subject: RE: [Equest-users] -nan Error
>
> Hi Bill,
>
> No I don't think that is the problem. I can easily bring it under 10% with
> minor changes. The -nans are there when there is boiler tank modeled as
> thermal storage, and they go away when I remove the boiler tank from the
> model.
>
> Thanks again,
>
>
>> Hmm. I have no idea. Maybe it will go away if you get your model to run
>> with fewer "outside of throttling range" hours. Did you have <10% before
>> you added thermal storage?
>>
>> ________________________________
>>
>> From: Ömer Moltay [mailto:omoltay at mimtarch.com]
>> Sent: Tuesday, February 09, 2010 7:57 AM
>> To: Bishop, Bill; equest-users at lists.onebuilding.org
>> Subject: Re: [Equest-users] -nan Error
>>
>> Hi Bill,
>>
>> Please find it attached. Thank you.
>>
>> Ömer Moltay, LEED AP
>> Mimta Ltd.
>> Hekimsuyu Cad. 559. Sk. No:39
>> 34255 Kucukkoy Istanbul Turkey
>> Tel: 90-212-617-2296
>> Fax: 90-212-617-2297
>> www.mimtarch.com
>>
>> Sürdürülebilir Binalar Blog
>> http://surdurulebilirbina.blogspot.com
>>
>> Green Building in Turkey on LinkedIn
>> http://www.linkedin.com/groups?gid=2278249
>>      ----- Original Message -----
>>      From: Bishop, Bill <mailto:wbishop at pathfinder-ea.com>
>>      To: Ömer Moltay <mailto:omoltay at mimtarch.com>
>>      Sent: Tuesday, February 09, 2010 2:48 PM
>>      Subject: RE: [Equest-users] -nan Error
>>
>>      Ömer,
>>      Can you post a screen shot or attach a copy of the BEPS report so we
>> know
>> what you are looking at?
>>      Thanks,
>>      Bill
>>
>>      William Bishop, EIT, LEED® AP | Pathfinder Engineers & Architects LLP
>>      Mechanical Engineer
>>
>>      134 South Fitzhugh Street
>>      Rochester, NY 14608
>>      T: (585) 325-6004 Ext. 114
>>      F: (585) 325-6005
>>      wbishop at pathfinder-ea.com
>>      www.pathfinder-ea.com
>>      P Please strive to live sustainably.
>>
>> ________________________________
>>
>>      From: equest-users-bounces at lists.onebuilding.org
>> [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Ömer
>> Moltay
>>      Sent: Tuesday, February 09, 2010 7:45 AM
>>      To: equest-users at lists.onebuilding.org
>>      Subject: [Equest-users] -nan Error
>>
>>      Hello once again,
>>
>>      What is the meaning of the "-nan" in the BEPS report? I started
>> receiving
>> these in certain columns after adding thermal storage to my model.
>>
>>      Thank you,
>>
>>      Ömer Moltay, LEED AP
>>      Mimta Ltd.
>>      Hekimsuyu Cad. 559. Sk. No:39
>>      34255 Kucukkoy Istanbul Turkey
>>      Tel: 90-212-617-2296
>>      Fax: 90-212-617-2297
>>      www.mimtarch.com
>>
>>      Sürdürülebilir Binalar Blog
>>      http://surdurulebilirbina.blogspot.com
>>
>>      Green Building in Turkey on LinkedIn
>>      http://www.linkedin.com/groups?gid=2278249
>>
>
>
>


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