<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type">
<title></title>
</head>
<body bgcolor="#ffffff" text="#000000">
Xavier,<br>
<blockquote
cite="mid57128.194.177.198.220.1124801989.squirrel@194.177.198.220"
type="cite">
<pre wrap="">I understand the ideas. I am quite new to trnsys and it seems to be quite
tedious
</pre>
</blockquote>
shading has become more and more of a problem in TRNSYS - the
developers are working on a much more streamlined, long term solution
that will simplify and automate the input.<br>
<blockquote
cite="mid57128.194.177.198.220.1124801989.squirrel@194.177.198.220"
type="cite">
<pre wrap="">1- I should create a new wall = my window with the given new orientation.
Sabina, Do you write this directly in the bld-file?
</pre>
</blockquote>
The most reliable method is to define a new ORIENTATION in Prebid (or
TRNBuild for TRNSYS 16 users), to define your window in the zone as an
"Additional Window" and <i>not</i> as a new wall that is the same area
as the window that you want to add.
<blockquote
cite="mid57128.194.177.198.220.1124801989.squirrel@194.177.198.220"
type="cite">
<pre wrap="">2- in Prebid, for the description of a window, there is an option called:
«external shad. factor»
where it is possible to get an input! But I do not find it again in my
input list in IISIBAT.
I do not find any doc about this kind of input.
</pre>
</blockquote>
the one disadvantage of this method is that Prebid and TRNBuild treat
both beam and diffuse radiation equally when it comes to external and
internal shading factors. Thus if you put a shading factor of 0.5, both
incident beam and diffuse radiation will be cut in half. The advantage
of the previous method (defining a new orientation) is that Type34 and
Type68 treat beam and diffuse radiation seperately - beam radiation
might be completely blocked while diffuse radiation is cut down by the
appropriate amount. <br>
<br>
To answer your specific question about not finding the input in
IISiBat, what you need to do is click on the little blue button next to
the External Shading Factor field. You then have three options for
defining the shading: setting a constant value, creating a new INPUT,
or designating a SCHEDULE. You'll want to select "Input" and then give
this new input a name such as "EXTSHD." Once you have regenerated your
Type56 files (*.trn, *.bld, *.bui, and *.inf) the list of inputs in the
*.inf file will include your newly defined input (EXTSHD). Switch to
IISiBat, right click on the Type56 icon and select "update building
variable list." IISiBat will then reread the *.inf file and include the
newly created INPUT.<br>
<br>
Kind regards,<br>
David<br>
<br>
<pre class="moz-signature" cols="72">--
**
David BRADLEY
Solar Energy Laboratory
University of Wisconsin - Madison
1500 Engineering Drive
Madison, WI 53706
United States
Ph: +1 608 263 1589
Fax: +1 608 262 8464
Email: <a class="moz-txt-link-abbreviated" href="mailto:dbradley@engr.wisc.edu">dbradley@engr.wisc.edu</a></pre>
</body>
</html>