Re: [TRNSYS-users] How many zones?

[knut.erik.enerstvedt@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@cae.wisc.edu
To:	trnsys-users@cae.wisc.edu
Date:	09/18/2009 02:24 PM
Subject:	TRNSYS-users Digest, Vol 57, Issue 31

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----- Message from PAUL COALES <coalespr@btinternet.com> on Fri,
18 Sep 2009 08:25:48 +0000 (GMT) -----

To:	trnsys-users@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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