Hi David,
Thanks for the suggestion. I had a look at
the tank models but they don’t seem to quite do what we require. In
particular we are looking at a box type shape that we could apply different
temperatures to the various walls as they would border different spaces. Our
thinking was to model the tank as a room but change the capacitance of the room
to represent a different fluid from air, turn off any infiltration etc so that
it is essentially a sealed box. Then place rooms on each of the sides of the
tanks so that it is completely surrounded. These rooms would then be incident
to the outside and a weather file used to determine the various parameters on
the outer walls. This determines the temperature of these spaces which will
then influence the tank at the centre; we then need to calculate the required
heating / cooling to keep the central tank (room) at a constant temperature.
So really is it possible to change the
properties of the air in a room? I see that it is possible to change the
capacitance? And does this approach sound sensible?
Thanks again,
Aly
From: David Bradley [mailto:bradley@tess-inc.com]
Sent: 20 September 2010 16:24
To: Alasdair Douglas
Cc: trnsys-users@cae.wisc.edu
Subject: Re: [TRNSYS-users]
Changing properties of air in a single room?
Alasdair,
I would recommend using an actual tank model; there are three vertically
cylindrical tank models in the TRNSYS standard library, one of which allows the
volume of liquid in the tank to vary with time. There are horizontally and
vertically cylindrical, spherical, and rectangular models in the TESS Library.
It is a bit harder to deal with open tanks; the best bet there might be to look
at using the Transsolar pool model although it neglects energy loss from the
sides of the pool.
regards,
david
On 9/20/2010 03:50, Alasdair Douglas wrote:
Dear All,
We are looking in to a project for
which we need to model tanks of liquid (probably oil) within a space and
calculate the heating required to keep the oil at a set temperature. Would it
be possible to model this tank as a room? Is there a way that the properties of
the air in a room could be changed to that of oil while any surrounding spaces
would have normal air properties? Or do you think a more simplistic model would
be more appropriate?
Thanks in advance,
Aly
_______________________________________________
TRNSYS-users mailing list
TRNSYS-users@cae.wisc.edu
https://www-old.cae.wisc.edu/mailman/listinfo/trnsys-users
--
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI 53703 USA
P:+1.608.274.2577
F:+1.608.278.1475
bradley@tess-inc.com
http://www.tess-inc.com
http://www.trnsys.com