Re: [EnergyPlus_Support] poll item (Ensure Air Mass Conservation in a Zone)

[Michael J Witte <mjwitte@xxxxxxxx>]

This is mentioned in the ZoneMixing documentation:
"In EnergyPlus, the ZoneMixing syntax is intended to allow simplified treatment of air
exchange between zones. Note that this statement only affects the energy balance of the
“receiving” zone and that this statement will not produce any effect on the “source” zone.
Mixing statements can be complementary and include multiple zones, but the balancing of
flows between zones is left to the user’s discretion."

On 7/19/2012 5:31 PM, Griffith, Brent wrote:

Hi Ery,

 

The main issue is that so-called simple airflows are not necessarily balanced with HVAC flows.  It is complicated to explain, but for example a user could input a set of ZoneMixing objects that don’t balance out with the air handler.

 

From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Ery Djunaedy
Sent: Thursday, July 19, 2012 3:19 PM
To: EnergyPlus MAILIST
Subject: [EnergyPlus_Support] poll item (Ensure Air Mass Conservation in a Zone)

 

 

All,

In the latest poll, there is one intriguing item for me:
Ensure Air Mass Conservation in a Zone (all airflows including HVAC,
exhaust, zone mixing, infiltration, etc.)

Does this mean that at the current state of development, EnergyPlus does
not ensure air mass conservation in a zone? I do not know what the poll
item means, I guess. Can someone elaborate on this? Which part of the
manuals I should read that indicate there is potentially a violation of
mass conservation in a zone?

Thanks,

Ery

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