[TRNSYS-users] How many zones?

[knut.erik.enerstvedt at niva.no]

Paul, 

The easiest way is to use two zones, but if the thernostat is in the hall, 
maybe you should include that zone as well? You can also consider using 
CONTAM or COMIS to calculate air exchange between the zones, although this 
makes it more complicated.

You can have one emitter for each zone. To represent parallell heating 
circuits, just split the total flow from the heat pump using a diverting 
valve component (Hydronics library) into one stream for each emitter and 
then, after the emitters, combine the streams again using a mixing valve 
component and connect it back to the heat pump.

Kind regards,
Knut Erik 



From:
trnsys-users-request at cae.wisc.edu
To:
trnsys-users at cae.wisc.edu
Date:
09/18/2009 02:24 PM
Subject:
TRNSYS-users Digest, Vol 57, Issue 31



----- Message from PAUL COALES <coalespr at btinternet.com> on Fri, 18 Sep 
2009 08:25:48 +0000 (GMT) -----
To:
trnsys-users at cae.wisc.edu
Subject:
[TRNSYS-users] How many zones?

I am modelling a 2-floor domestic property.  The 2 floors are connected by 
an open hall, stairs and landing.  A thermostat is located in the hall.

A single heating system (GSHP) will need to supply heat to both floors 
(under floor heating or low temperature radiators.)

What is the easiest way of modelling this;  I'm thinking:

1) Use 2 zones;  One for upstairs and one for down stairs.
2) Each zone has an emitter.
3) Each emitter is a load on the same heating system.  Is it easy to 
represent parallel heating circuits from a single heat source?  What 
components should I be looking at?

Any comments welcome.
Thanks
Paul





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