Re: [TRNSYS-users] Two stories with a Type 56 or Type 660

["Matt Duffy" <duffy@tess-inc.com>]

Lucas,

Type 56 is essentially non-geometric; it is just concerned with how you
define your walls. Like you said, you define the ceiling - floor
adjacenct, but remember to define the front-back accordingly in the zone.
You define the convective heat transfer coefficients in the wall
typemanager which should take care of the summer issue. Simply define the
floor-ceiling materials as you would with a wall.  Last, you can define a
very small adjacent wall(apprx. 1 m^2 and 0.1 m thick) between the zones,
and define a bi-directional air coupling rate(make sure to do for both
zones).  As a rule of thumb, my colleague does a rate of 5 ACH per the
smaller room. You could also use the CONTAM program to determine the air
coupling rate.

Best regards,

Matt Duffy


----- Original Message -----
From: "Lucas Witmer" <ltw110@psu.edu>
Sent: Thu, July 17, 2008 14:17
Subject:[TRNSYS-users] Two stories with a Type 56 or Type 660


Hi,

I
am trying to model a multizone building that has two stories.  I am
more comfortable using a Type 56, but recently found that I can
probably do a simplified version using a Type 660.  However, I am not
sure how to model a second story accurately with either of them.

I understand that the ceiling/floor between the two stories is simply
an adjacent, horizontal wall between the two zones, but what should I
do to get heat to flow upward through the building as it would in a
normal house (upstairs hotter in summer).

Also, is there a specific library material that should be used for the
boundary between the upstairs and downstairs, assuming standard
construction?
Finally,
if I want two zones but no dividing wall between the zones, how would I
do that.  In the wall type manager there is a layer that I can use
called SILENCE.  does that mean "nothing" or something else?


Thanks,<mailto:ltw110@psu.edu>

Lucas Witmer

M.S. Candidate Energy &amp; Mineral Engineering
216 Hosler Building
University Park, PA 16802
650.796.6814
ltw110@psu.edu







----- End of original message -----