This schedule does not override the economizer
operation; it simply establishes the minimum outside air fraction.
Note that, while a minimum outside
air ratio of 0.05 may be sufficent to dilute CO2 at low occupancy
levels, the building may have other internal sources of air pollution, such
as carpet outgassing, that may require that the outdoor levels always be kept
above some minimum. This is particularly true when the building is new, or
when the building has been rennovated.
I suggest you set up an hourly report looking at
total supply airflow and the outside airflow to confirm the program is modeling
as you intended.
----- Original Message -----
Sent: Thursday, March 20, 2003 12:10
PM
Subject: [BLDG-SIM] Simulation of Demand
Controlled Ventilation
In
order to vary the outdoor air with occupany (with CO2 sensors in the return
air that controls the OA dampers), I repeated the occupancy schedule in the MIN-AIR-SCH also. The energy use
went up compared to the same input (which also specified airside economizer)
that did not have MIN-AIR-SCH. I assume the schedule was applied during
the intermediate season also when it should be using 100% OA. In this situation the OA must vary
independently of the supply air which would be based on the cooling load in a VAV system
Varkie.
What does -999 do in the Min-Air-Sch? Doesn't that "vote" on what OSA
is needed, and also yield to the economizer as well?
We tried scheduling the outdoor air fraction in the Systems
component of the DOE2.1E program by using the occupancy schedule in the
Loads component. This would vary the outdoor air
based on occupancy using CO2 sensors in the Return Air. However
the schedule overrode the air-side economizer. Can this problem be
fixed in DOE2.1E?
Varkie Thomas
Hello
group
Does anyone out there have
experience with simulating demand controlled ventilation in DOE2?
I am especially interested in any work that validates the use of such a
model for estimating energy savings from this control scheme. Any
advice or information would be greatly appreciated.
Thanks!
Bob
Bob Ramírez,
P.E.
Senior
Engineer
Bob@xxxxxxx , Bob.Ramirez@xxxxxxxxx
RER
is now Itron!
http://www.RER.com/Consulting
11236 El Camino Real
San Diego, CA 92130 USA
VOICE:858.481.0081X427
FAX:858.481.7550
==================
You received this e-mail because you are subscribed
to the BLDG-SIM@xxxxxxxx mailing list. To unsubscribe
from this mailing list send a blank message to
BLDG-SIM-UNSUBSCRIBE@xxxxxxxx
=====================================================You received this e-mail because you are subscribed
to the BLDG-SIM@xxxxxxxx mailing list. To unsubscribe
from this mailing list send a blank message to
BLDG-SIM-UNSUBSCRIBE@xxxxxxxx
==================
You received this e-mail because you are subscribed
to the BLDG-SIM@xxxxxxxx mailing list. To unsubscribe
from this mailing list send a blank message to
BLDG-SIM-UNSUBSCRIBE@xxxxxxxx
=====================================================You received this e-mail because you are subscribed
to the BLDG-SIM@xxxxxxxx mailing list. To unsubscribe
from this mailing list send a blank message to
BLDG-SIM-UNSUBSCRIBE@xxxxxxxx