[bldg-sim] ESL web tool [was Green Building Studio discussion]

[Jeff Haberl]

FYI...

The ESL's web tool was developed to be a code-compliant checking tool.
Hence, no thermal mass is simulated (other than the Pre-calculated
weighting factors), since thermal mass is not part of the 2000/2001 IECC
Chapter 4 analysis, which has a fixed thermal mass.

Second, for any IECC or 90.1 analysis, windows must be defined as a
U-value and SHGC, hence this simplified approach was used. This is an
issue I've raised with ICC and ASHRAE, namely that it is impossible to
simulate the IECC or 90.1 with any simulation tool that uses Windows 5
program, since this program cannot be run using Uvalue and SHGC...one
must have a real window.

You are right in saying that this introduces errors. However, if one is
simulating the IECC or 90.1 one must simulate the erroneous tables that
were produced with ASHRAE weighting factors and SC calcs...

We are developing an improved version that will have layered walls,
thermal mass, Windows 5 files, Winklemann's floor model, a duct model,
etc. 

We have several thesis on these problems as well.

Jeff

8=!  8=)  :=)  8=)  ;=)  8=)  8=(  8=)  8=()  8=)  8=|  8=)  :=')  8=)
8=)  8=?

Jeff S. Haberl, Ph.D.,
P.E.............................jhaberl at esl.tamu.edu

Professor......................................................Office
Ph: 979-845-6507

Department of Architecture.......................Lab Ph: 979-845-6065 

Energy Systems Laboratory.......................FAX: 979-862-2457 

Texas A&M University..............................77843-3581

College Station, Texas, USA.......................URL: www-esl.tamu.edu

8=/  8=)  :=)  8=)  ;=)  8=)  8=()  8=)  :=)  8=)  8=!  8=)  8=?  8=)
8=)  8=0 

 


-----Original Message-----
From: bldg-sim at gard.com [mailto:bldg-sim at gard.com] On Behalf Of John F.
Kennedy
Sent: Tuesday, January 03, 2006 5:27 PM
To: bldg-sim at gard.com
Cc: bldg-sim at gard.com
Subject: [bldg-sim] ESL web tool [was Green Building Studio discussion]

Charlie,

Just to be clear, your discussion below is for the ESL web tool not
Green Building Studio. 

John

John F. Kennedy
President & CTO

Green Building Studio, Inc.
www.greenbuildingstudio.com
707.569.7373 v
707.569.7313 f
707.235.1335 c 

-----Original Message-----
From: bldg-sim at gard.com [mailto:bldg-sim at gard.com] On Behalf Of D.
Charlie Curcija
Sent: Tuesday, January 03, 2006 5:12 AM
To: bldg-sim at gard.com
Subject: [bldg-sim] Green Building Studio

This is nice try in terms of web based tool, although I don't
particularly like that the calculations are done as batch runs and
results sent via emails.  Also, windows are specified only through fixed
U-factor and SHGC, which is gross simplification and it introduces
relatively large errors.
Some of the other limitations like inability to specify weight of the
wall and roof construction, simple rectangular shapes only, etc. could
be relatively significant barriers for wider use.

Charlie

P.S.  In some instances, the tool gives an error after I select a
building and fill-in basic info.  I tried from couple of browsers, and I
get the same
behavior:


Server Error in '/GUI' Application.
Access to the path "d:\data\Inetpub\wwwroot\GUI\ASP_Err.log" is denied. 
Description: An unhandled exception occurred during the execution of the
current web request. Please review the stack trace for more information
about the error and where it originated in the code. 

Exception Details: System.UnauthorizedAccessException: Access to the
path "d:\data\Inetpub\wwwroot\GUI\ASP_Err.log" is denied. 

ASP.NET is not authorized to access the requested resource. Consider
granting access rights to the resource to the ASP.NET request identity.
ASP.NET has a base process identity (typically {MACHINE}\ASPNET on IIS 5
or Network Service on IIS 6) that is used if the application is not
impersonating. If the application is impersonating via <identity
impersonate="true"/>, the identity will be the anonymous user (typically
IUSR_MACHINENAME) or the authenticated request user. 

To grant ASP.NET write access to a file, right-click the file in
Explorer, choose "Properties" and select the Security tab. Click "Add"
to add the appropriate user or group. Highlight the ASP.NET account, and
check the boxes for the desired access.

Source Error: 




Line 23: // String error_file_path =
ConfigurationSettings.AppSettings.Get
("ErrorLogFile");
Line 24: string error_file_path = Config.GetConfigValue("WEB",
"ErrorLogFile"); Line 25: StreamWriter sw =
System.IO.File.AppendText(error_file_path);
Line 26: sw.AutoFlush = true ;
Line 27: //write string to file

Source File: d:\data\inetpub\wwwroot\GUI\Home\WebLogger.cs    Line: 25 

Stack Trace: 




[UnauthorizedAccessException: Access to the path
"d:\data\Inetpub\wwwroot\GUI\ASP_Err.log" is denied.]
   System.IO.__Error.WinIOError(Int32 errorCode, String str) +393
   System.IO.FileStream..ctor(String path, FileMode mode, FileAccess
access, FileShare share, Int32 bufferSize, Boolean useAsync, String
msgPath, Boolean
bFromProxy) +888
   System.IO.FileStream..ctor(String path, FileMode mode, FileAccess
access, FileShare share, Int32 bufferSize) +44
   System.IO.StreamWriter.CreateFile(String path, Boolean append) +55
   System.IO.StreamWriter..ctor(String path, Boolean append, Encoding
encoding, Int32 bufferSize) +49
   System.IO.StreamWriter..ctor(String path, Boolean append) +66
   System.IO.File.AppendText(String path) +32
   ECalc.GUI.WebLogger.writeLog(String message) in
d:\data\inetpub\wwwroot\GUI\Home\WebLogger.cs:25
   ECalc.GUI.NavigationMap.GetNextPage(String currentLocationID) in
d:\data\inetpub\wwwroot\GUI\Home\NavigationMap.cs:119
   GUI.Home.UserControl.BasicProInfo.btnSubmit_Click(Object sender,
EventArgs e) in
d:\data\inetpub\wwwroot\gui\home\usercontrol\basicproinfo.ascx.cs:581
   System.EventHandler.Invoke(Object sender, EventArgs e) +0
   System.Web.UI.WebControls.Button.OnClick(EventArgs e) +108
 
System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.Rai
sePo
stBackEvent(String eventArgument) +57
   System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler
sourceControl, String eventArgument) +18
   System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData)
+33
   System.Web.UI.Page.ProcessRequestMain() +1292

-----Original Message-----
From: bldg-sim at gard.com [mailto:bldg-sim at gard.com] On Behalf Of Jeff
Haberl
Sent: Monday, December 26, 2005 10:01 PM
To: bldg-sim at gard.com
Subject: [bldg-sim] Green Building Studio

FYI

The ESL has developed a web-based IECC and 90.1-compliant simulation for
Texas as part of our work for EPA to calc NOx emissions reductions. 

You can visit a beta version at "ecalc.tamu.edu". Documentation on the
iterations needed for an office building can be found in the 6 ICEBO
papers under the "reports" tab of "eslsb5.tamu.edu". 

I look forward to feedback from users. 

Jeff
BB 8=!  8=)  :=)  8=)  ;=)  8=)  8=(  8=)  :=')  8=)  8=)  8=? BB

Jeff S. Haberl, Ph.D.,
P.E.............................jhaberl at esl.tamu.edu

Professor......................................................Office
Ph:
979-845-6507

Department of Architecture.......................Lab Ph: 979-845-6065 

Energy Systems Laboratory.......................FAX: 979-862-2457 

Texas A&M University..............................77843-3581

College Station, Texas, USA.......................URL: www-esl.tamu.edu

BB 8=/  8=)  :=)  8=)  ;=)  8=)  8=()  8=) 8=?  8=)  8=)  8= BB


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