Re: [TRNSYS-users] Thermal mass in type 56

["Patrick Wilkinson" <patrick.wilkinson@ibece.net>]

Matt,

I am in the same situation where I am using night time radiation cooling
with the unglazed solar plate collector to cooling the slabs in a high
rise residential building. I have modeled the building in other software
and therefore do not want to use TYPE56 for now. The slabs will not be
coupled to the earth. What component would I use to see simulate the
thermal mass slab with would be connected to TYPE559? (TYPE712?,
TYPE653?, TYPE705/6??) 

And what is the main difference between type705a and type 706a? and
input/output files?

Thanks for the help

Patrick Wilkinson, B.Sc. ENG, LEED(r) AP
Advanced Technology Group


14130 Riverside Drive Suite 201
Sherman Oaks, CA 91423
p:   (818) 377-8220 ext. 240
f:    (818) 377-8230


 
 
 
 
 
 
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-----Original Message-----
From: Matt Duffy [mailto:duffy@tess-inc.com] 
Sent: Wednesday, December 17, 2008 5:54 AM
To: Chatchawan Chaichana; trnsys-users@engr.wisc.edu
Subject: Re: [TRNSYS-users] Thermal mass in type 56



Dear Dr. Chatchawan Chaichana,

I recommend using one of Jeff's (TESS) slab models to simulate the heat
transfer between the low temperature room and the ground - assuming that
the concrete slab is coupled to the earth.

Jeff sent a user some diagrams of temperature beneath a slab of a super
market store that also had a low temperature room. You will notice the
low
temperature room in the top, right corner of the diagram.

https://www-old.cae.wisc.edu/pipermail/trnsys-users/2008/003641.html




Best regards,

Matt Duffy
----- Original Message -----
From: "Chatchawan Chaichana" <c.chaichana@gmail.com>
Sent: Tue, December 16, 2008 12:19
Subject:[TRNSYS-users] Thermal mass in type 56


Hi there,
I'm working on a very low temperature storage room project. I'd like to
simulate the energy consumption of the refrigeration system that is used
to
remove heat gain to the room. The refrigeration system will be operated
only
during the night. There is a mass of concrete inside the room acting as
thermal mass. At the end of the night, the concrete temperature  is to
be
-30C. During the day, the refrigeration system is off, leaving the
concrete
slap to supply cooling to the room. Yes, it is another demand side
management.

At the moment, I'm using Type 56 as the storage room with only one zone
(may
create other zones later). I'm wondering how can I model the concrete
slab
inside the room.

Best regards,
Chat

-- 
----------------------------------------------------------------
Asst. Prof. Dr. Chatchawan Chaichana
Department of Mechanical Engineering
Faculty of Engineering
Chiang Mai University, 50200
THAILAND
URL: http://www.thaienergydata.in.th/chatchawan
Tel: +66 5394 2009
Fax: +66 5389 2375
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----- End of original message -----

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