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Today's Topics:
1. airchange between zones (Alex moreno)
2. Re: airchange between zones (David BRADLEY)
---------- Forwarded message ----------
From: Alex moreno <alamoreno19@hotmail.com>
To: trnsys_users <trnsys-users@lists.onebuilding.org>
Cc:
Bcc:
Date: Wed, 24 Jan 2018 14:22:02 +0000
Subject: [TRNSYS-users] airchange between zones
Hi
I have a doubt when i modeling a single family building with two floors,
how i can connect the airchange between of two zones (first floor and
second floor)
another doubt is:
Firstly i simulated the two floors us one zones, but now i simulate the
buildign us two zones, the results of heating differ 2% respec of one
zone building and differ cooling 10%, it is normally?
regards
Alex
---------- Forwarded message ----------
From: David BRADLEY <d.bradley@tess-inc.com>
To: "TRNSYS users mailing list at OneBuilding.org" <trnsys-users@lists.onebuilding.org>
Cc: Alex moreno <alamoreno19@hotmail.com>
Bcc:
Date: Wed, 24 Jan 2018 16:49:40 -0600
Subject: Re: [TRNSYS-users] airchange between zones
Alex,
When you define an ADJACENT wall (or floor/ceiling) between two zones you have the ability to define a coupling air flow rate from each to the other. You can set the flow rate as a constant, as a scheduled value, or as an input. Type56 leaves it to you to determine how much air flows back and forth between the zones.
The most correct way of determining the quantity of airflow is to use an airflow modeling tool such as TRNFlow or Type97/CONTAM.
It is hard to answer your second question. The answer depends on what metrics you are looking at. For instance, I would be surprised to see the loads of the building change by 10% based on 1 zone or 2. However, if you are looking at consumption of energy by an HVAC system then it is possible, especially if you are using a single thermostat to control the system.
kind regards,
David
On 01/24/2018 08:22, Alex moreno via TRNSYS-users wrote:
Hi
I have a doubt when i modeling a single family building with two floors,
how i can connect the airchange between of two zones (first floor and
second floor)
another doubt is:
Firstly i simulated the two floors us one zones, but now i simulate the
buildign us two zones, the results of heating differ 2% respec of one
zone building and differ cooling 10%, it is normally?
regards
Alex
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--
***************************
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
d.bradley@tess-inc.com
http://www.tess-inc.com
http://www.trnsys.com
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