<div dir="ltr">Do Type56 and TRNBuild refer to the same thing?<br><br><div class="gmail_quote">On Fri, Aug 1, 2008 at 10:35 AM, Timothy McDowell <span dir="ltr"><<a href="mailto:mcdowell@tess-inc.com">mcdowell@tess-inc.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Chaoqin -<br>
<br>
There is not a CAD interface for Type56. TRNBuild is a program that<br>
allows you to define your zones and enter the wall and window areas and<br>
define orientations and adjacencies of the walls, along with defining your<br>
internal gains, infiltration flows, ventialtions flows, etc.<br>
<div class="Ih2E3d"><br>
Regards,<br>
<br>
Tim<br>
<br>
----------------------------------<br>
Timothy McDowell<br>
Executive Vice President<br>
</div><div class="Ih2E3d">Thermal Energy System Specialists, LLC<br>
</div><div class="Ih2E3d">2916 Marketplace Dr, Suite 104<br>
Madison, WI 53719<br>
Phone: 608-274-2577<br>
Fax: 608-278-1475<br>
<br>
----- Original Message -----<br>
From: "Zhai Chaoqin" <<a href="mailto:crithy@gmail.com">crithy@gmail.com</a>><br>
</div><div class="Ih2E3d">Sent: Fri, August 1, 2008 9:04<br>
Subject: Re: [Bldg-sim] "Qualified" energy modeling tools for LEED NC v2.2<br>
<br>
<br>
<br>
</div><div><div></div><div class="Wj3C7c">David,<br>
<br>
I am not familiar with TRNBuild. Does it have a built-in CAD interface<br>
that one can draw a building? Can one define building surfaces by<br>
coordinates? Can one import a 2-D or 3-D CAD drawing? As I recall in<br>
Type56, one needs to pre-calculate the wall and window areas by<br>
orientation for each zone and input the area value into TRNSYS. I am not<br>
sure if this is still the case.<br>
<br>
Thanks,<br>
Chaoqin<br>
<br>
<br>
<br>
On Fri, Aug 1, 2008 at 9:43 AM, David Bradley <<a href="mailto:bradley@tess-inc.com">bradley@tess-inc.com</a>> wrote:<br>
<br>
Chaoqin,<br>
There are three parts to the geometry issue.<br>
<br>
For internal radiation exchange, you are correct that TRNSYS is a<br>
non-geometrical model and that two surfaces do not have any knowledge of<br>
their mutual view factor. Like many of the other building models out<br>
there, TRNSYS uses a star-network in which each surface "radiates" to<br>
the air node and vice versa.<br>
<br>
For external geometry, one defines orientations in the building<br>
processor (TRNBuild) and then defines corresponding surfaces (slope and<br>
azimuth) in the weather data reader. Solar radiation from a particular<br>
weather data reader surface is then linked to the appropriate Type56<br>
inputs for each orientation defined in TRNBuild.<br>
<br>
For external shading (including building self-shading), one places a<br>
series of wingwall and overhang components between the unshaded solar<br>
radiation calculated by the weather data reader and the building, in<br>
effect cutting down on the amount of radiation incident on the building.<br>
It is a flexible methodology but a bit of a cumbersome one. One of the<br>
main pushes in the current development of TRNSYS 17 is a much more<br>
automated methodology for doing building self-shading. The Type56<br>
developers are also working on a true view-factor methodology for<br>
internal radiation exchange within a zone.<br>
<br>
Kind regards,<br>
David<br>
<br>
**************************************<br>
David BRADLEY - Principal<br>
<br>
Thermal Energy System Specialists, LLC<br>
2916 Marketplace Drive - suite 104<br>
Madison, WI 53719<br>
USA<br>
<br>
Ph: +1.608.274.2577<br>
Fx: +1.608.278.1475<br>
<a href="mailto:bradley@tess-inc.com">bradley@tess-inc.com</a><br>
<a href="http://www.tess-inc.com" target="_blank">http://www.tess-inc.com</a><br>
<a href="http://www.trnsys.com" target="_blank">http://www.trnsys.com</a><br>
**************************************<br>
<br>
<br>
<br>
<br>
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