RE: [EnergyPlus_Support] Updated and New Testing Reports on Energ yPlus Available

[Linda Lawrie <linda@xxxxxxxxxx>]

Note page # 15 (page 48 in PDF) of the Input Output reference document:

Airflow Model

EnergyPlus allows users to model airflow into and through a building using 
either a simplified
infiltration model and user-specified interzone airflows, or the COMIS 
multi-zone airflow
model. COMIS, which stands for "Conjunction of Multi-zone Infiltration 
Specialists", is a
network-based multi-zone airflow model developed by a multinational team in 
the framework
of International Energy Agency's Annex 23 for simulating airflows through 
the building fabric
due to infiltration or natural ventilation, and from zone to zone, as well 
as the interactions of
the HVAC system, ducts, and exhaust hoods and fans. Currently in the COMIS 
modeling,
only the air flows through the building fabric and from zone to zone has 
been implemented,
and not the air flow through the ducts and mechanical systems.

However, EnergyPlus can model air flow through the ducts and mechanical 
systems, as well
as infiltration and multi-zone air flow using the Air Distribution System 
(ADS) model. The
airflow models (SIMPLE or COMIS) described in this section can be used in 
conjunction with
the ADS model, and a description of the impacts of using both models can be 
found in the
section Group -- Air Distribution System.

Field: AirFlowModelValue
This alpha field designates which kind of airflow model will be used during 
the simulation.
The choices are "Simple" or "COMIS". For the Simplified Air Flow Model, the 
allowable inputs
are then Infiltration, Mixing, and Cross Mixing. These are described later 
under "Group
AirFlow". For the COMIS Multi-zone Air Flow Model, the allowable inputs are 
described in
the second part of the AirFlow Group. All of the COMIS-related inputs begin 
with the word
"COMIS".

Simply put, if you choose to use the "COMIS" airflow model, then any and 
all infiltration, mixing and cross-mixing input objects are ignored.


Linda

EnergyPlus WebSite: http://www.energyplus.gov
Owner: EnergyPlus_Support list
Member: EnergyPlus Development Team



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