[Bldg-sim] Bldg-sim Digest, Vol 6, Issue 14

Alison Christensen alisonc at pae-engineers.com
Wed May 14 14:57:33 PDT 2008


Nedzib, 
The string below details using TMY3. I didn't get to the third step, but
I will approach again if it is requested.

-----Original Message-----
From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of
bldg-sim-request at lists.onebuilding.org
Sent: Wednesday, May 14, 2008 2:07 PM
To: bldg-sim at lists.onebuilding.org
Subject: Bldg-sim Digest, Vol 6, Issue 14

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Today's Topics:

   1. Re: TMY3 Released with 1020 US Locations (Randy Wilkinson)
   2. Re: eQUEST - percent of hours outside throttling range
      (Kevin Kyte)
   3. Re: eQUEST - percent of hours outside throttling range
      (Vikram Sami)
   4. Re: Spam:Re:  TMY3 Released with 1020 US Locations (James Hess)
   5. Re: TMY3 Released with 1020 US Locations (Tim Johnson)


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

Message: 1
Date: Wed, 14 May 2008 10:21:30 -0700
From: Randy Wilkinson <randy at hvacware.net>
Subject: Re: [Bldg-sim] TMY3 Released with 1020 US Locations
To: bldg-sim at onebuilding.org
Message-ID: <482B1F9A.8030104 at hvacware.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Be aware that what NREL calls TMY2 weather data is true text based TMY2 
weather data per their original definition.  DOE2 (eQuest) uses a binary

version of the TMY2 weather files.  The binary version is about 1/10th 
the file size of the original text based TMY2 file.  You need to use 
another weather processor to convert the true TMY2 into a binary version

(xxxxxx.BIN) for use with eQuest.  You can't just rename the file as it 
sounds like you did.

step 1 - Get the TMY3 weather file for your location
step 2 - Use NREL's TMY3toTMY2 converter to convert it to TMY2
step 3 - Use DOE2 or EnergyPlus weather utilities to convert the text 
based TMY2 weather file to a binary version for use with DOE2 (eQuest)

I think you skipped step 3.

Randy Wilkinson

James Hess wrote:
> Great news on the TMY3 weather data.  We want to start using it in
eQuest.
>
> However, FYI... in order to test the new TMY3 files out, we downloaded
a TMY3
> weather file for Little Rock, AR.  Then we converted the TMY3 file to
TMY2
> (using same name as TMY2 --> LITTLEAR.BIN ), placed it in a new folder
under
> eQuest weather (Weather\TMY3) then tried to use in eQuest and got an
error,
> and the simulation would not run.
>
> Is there any additional information that we need to know in order to
make
> this work?
>
>   


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

Message: 2
Date: Wed, 14 May 2008 13:29:47 -0400
From: "Kevin Kyte" <kkyte at robsonwoese.com>
Subject: Re: [Bldg-sim] eQUEST - percent of hours outside throttling
	range
To: "'Demba Ndiaye'" <demba.ndiaye at setty.com>,	"'Ramana Koti'"
	<ramana.koti at gmail.com>, <bldg-sim at lists.onebuilding.org>
Message-ID: <002601c8b5e8$1d7a17c0$586e4740$@com>
Content-Type: text/plain; charset="us-ascii"

Check all plant and system schedules, make sure they are correct and
agree
with occupancy schedules.

 

Kevin Kyte, LEED AP

RobsonWoese, Inc.

(T) 716-636-1800

(F) 716-636-1856

 <http://robsonwoese.com/index.php> http://robsonwoese.com

 

From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Demba
Ndiaye
Sent: Wednesday, May 14, 2008 1:17 PM
To: Ramana Koti; bldg-sim at lists.onebuilding.org
Subject: Re: [Bldg-sim] eQUEST - percent of hours outside throttling
range

 

Ramana, 

 

You seem to have a problem of loop under-sizing: try to increase the
number
of wells.

 

______________

Demba Ndiaye

  _____  

From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Ramana Koti
Sent: Wednesday, May 14, 2008 12:13 PM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] eQUEST - percent of hours outside throttling range

 

Dear all,

I'm working on the energy model for a school building with 43 zones with
each zone connected to a ground source heat pump. Right now the model is
for
design development but eventually the same model could be used for LEED.

I can't seem to get the percent of hours any system zone outside of
throttling range below 48%. The system sizing ratio of all airside
systems
is currently at 2. As per HVAC design, the depth of ground source loop
is
400 ft and I tried increasing it to 600 ft and that only helps a little.

In the SS-R report, the undercooled hours for different zones are in the
200+ range while the underheated hours are in the range of 200 to 500.
I'm
using the Dodge City, KS weather file.

Also the current annual energy consumption is as low as 18.1 kBtu/ft2, I
know that will change as the % hours outside the throttling range
changes
but still seems very low.

Thanks for your help,
 
RAMANA KOTI Assoc. ASHRAE LEEDR AP 
Sustainable Building Analyst

ELEMENTS division of BNIM architects
106 West 14th Street Suite 200
Kansas City Missouri 64105

d 816.783.1635 f 816.783.1501
bnim.com | elements.bnim.com 

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Message: 3
Date: Wed, 14 May 2008 13:45:39 -0400
From: "Vikram Sami" <VSami at lasarchitect.com>
Subject: Re: [Bldg-sim] eQUEST - percent of hours outside throttling
	range
To: "Ramana Koti" <ramana.koti at gmail.com>,
	<bldg-sim at lists.onebuilding.org>
Message-ID:
	
<55BA83825A482144A8637F9CAA981F76103266A7 at las-mail.lordaecksargent.inter
nal>
	
Content-Type: text/plain; charset="us-ascii"

Ramana,
Check your schedules - make sure you are ramping up (or down) your
temperatures in a reasonable increment. Also - make sure your fans are
allowed to turn on at the appropriate times too. 
 

Vikram Sami, LEED AP 
Direct Phone 404-253-1466 | Direct Fax 404-253-1366 

LORD, AECK & SARGENT ARCHITECTURE
1201 Peachtree Street NE, Suite 300, Atlanta, GA 30361 
Responsive Design * Technological Expertise * Exceptional Service 
www.lordaecksargent.com 

Please don't print this email unless you really have to. 
In the United States, we use enough office paper each year to build a
10-foot high wall that's 6,815 miles long or two and a half times the
distance from New York to Los Angeles. 

~ Wisconsin Department of Natural Resources, "Recycling Facts and
Figures," PUBL CE-163, 2002. 

 

________________________________

From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Ramana Koti
Sent: Wednesday, May 14, 2008 12:13 PM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] eQUEST - percent of hours outside throttling range


Dear all,

I'm working on the energy model for a school building with 43 zones with
each zone connected to a ground source heat pump. Right now the model is
for design development but eventually the same model could be used for
LEED.

I can't seem to get the percent of hours any system zone outside of
throttling range below 48%. The system sizing ratio of all airside
systems is currently at 2. As per HVAC design, the depth of ground
source loop is 400 ft and I tried increasing it to 600 ft and that only
helps a little.

In the SS-R report, the undercooled hours for different zones are in the
200+ range while the underheated hours are in the range of 200 to 500.
I'm using the Dodge City, KS weather file.

Also the current annual energy consumption is as low as 18.1 kBtu/ft2, I
know that will change as the % hours outside the throttling range
changes but still seems very low.

Thanks for your help,
 
RAMANA KOTI Assoc. ASHRAE LEED(r) AP 
Sustainable Building Analyst

ELEMENTS division of BNIM architects
106 West 14th Street Suite 200
Kansas City Missouri 64105

d 816.783.1635 f 816.783.1501
bnim.com | elements.bnim.com 

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Message: 4
Date: Wed, 14 May 2008 13:09:49 -0500
From: "James Hess" <JHess at tmecorp.com>
Subject: Re: [Bldg-sim] Spam:Re:  TMY3 Released with 1020 US Locations
To: "Randy Wilkinson" <randy at hvacware.net>,
<bldg-sim at onebuilding.org>
Message-ID:
	<FA5ADDF4A8F8294482D7D6FE6FF87776028B41D2 at tme-s05.tmecorp.com>
Content-Type: text/plain;	charset="US-ASCII"

Randy,

I very much appreciate that information!

Thank you

Regards,

JAH

James A. Hess, PE, CEM
Energy Engineering Team Leader

5800 Evergreen Drive
Little Rock, AR 72205
Office: (501) 666-6776, x2172
Mobile: (501) 351-4667
www.tmecorp.com

-----Original Message-----
From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Randy
Wilkinson
Sent: Wednesday, May 14, 2008 12:21 PM
To: bldg-sim at onebuilding.org
Subject: Spam:Re: [Bldg-sim] TMY3 Released with 1020 US Locations

Be aware that what NREL calls TMY2 weather data is true text based TMY2 
weather data per their original definition.  DOE2 (eQuest) uses a binary

version of the TMY2 weather files.  The binary version is about 1/10th 
the file size of the original text based TMY2 file.  You need to use 
another weather processor to convert the true TMY2 into a binary version

(xxxxxx.BIN) for use with eQuest.  You can't just rename the file as it 
sounds like you did.

step 1 - Get the TMY3 weather file for your location
step 2 - Use NREL's TMY3toTMY2 converter to convert it to TMY2
step 3 - Use DOE2 or EnergyPlus weather utilities to convert the text 
based TMY2 weather file to a binary version for use with DOE2 (eQuest)

I think you skipped step 3.

Randy Wilkinson

James Hess wrote:
> Great news on the TMY3 weather data.  We want to start using it in
eQuest.
>
> However, FYI... in order to test the new TMY3 files out, we downloaded
a
TMY3
> weather file for Little Rock, AR.  Then we converted the TMY3 file to
TMY2
> (using same name as TMY2 --> LITTLEAR.BIN ), placed it in a new folder
under
> eQuest weather (Weather\TMY3) then tried to use in eQuest and got an
error,
> and the simulation would not run.
>
> Is there any additional information that we need to know in order to
make
> this work?
>
>   
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------------------------------

Message: 5
Date: Wed, 14 May 2008 13:29:25 -0600
From: "Tim Johnson" <timj at ctagroup.com>
Subject: Re: [Bldg-sim] TMY3 Released with 1020 US Locations
To: "Randy Wilkinson" <randy at hvacware.net>,
<bldg-sim at onebuilding.org>
Message-ID: <482AE935020000BB000025D4@ CTA_GWIA.ctagroup.com>
Content-Type: text/plain; charset=US-ASCII

I am attempting to follow these steps, but I can't seem to figure out
how to use the DOE2 unilities.  It looks like it is only DOS based and I
am not familiar with DOS.  Could you walk me through the steps to
convert from .TM2 to .bin using the DOE2 utility?
Thanks,
Tim

>>> Randy Wilkinson <randy at hvacware.net> 05/14/08 11:21 AM >>>
Be aware that what NREL calls TMY2 weather data is true text based TMY2 
weather data per their original definition.  DOE2 (eQuest) uses a binary

version of the TMY2 weather files.  The binary version is about 1/10th 
the file size of the original text based TMY2 file.  You need to use 
another weather processor to convert the true TMY2 into a binary version

(xxxxxx.BIN) for use with eQuest.  You can't just rename the file as it 
sounds like you did.

step 1 - Get the TMY3 weather file for your location
step 2 - Use NREL's TMY3toTMY2 converter to convert it to TMY2
step 3 - Use DOE2 or EnergyPlus weather utilities to convert the text 
based TMY2 weather file to a binary version for use with DOE2 (eQuest)

I think you skipped step 3.

Randy Wilkinson

James Hess wrote:
> Great news on the TMY3 weather data.  We want to start using it in
eQuest.
>
> However, FYI... in order to test the new TMY3 files out, we downloaded
a TMY3
> weather file for Little Rock, AR.  Then we converted the TMY3 file to
TMY2
> (using same name as TMY2 --> LITTLEAR.BIN ), placed it in a new folder
under
> eQuest weather (Weather\TMY3) then tried to use in eQuest and got an
error,
> and the simulation would not run.
>
> Is there any additional information that we need to know in order to
make
> this work?
>
>   
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