Hi folks,
I am using eQUEST to model electric baseboard heating with ventilation in
a multi-story residential building. I set electric baseboards at the zone
level, and chose packaged single zone (no heating and only baseboard) at
the system level to model the ventilation. The model runs and gives me
zero unmet hours, but the electricity consumption for baseboards is less
than what I am expecting.
The total building load in LS-F report seems to be right, and quite aligns
with my expectation. Now, this load must be met via baseboards that are
installed in the residential units. Also, the baseboards must provide heat
to heat up the constant running fans for the dedicated outdoor air that I
assigned to each zone.
The electricity consumption that I get in BEPS report is only enough to
meet the building load (as reported in LS-F) but not large enough to heat
up the OA. I did a simple hand calculation for one space during Jan, and
the values for electricity consumption in baseboards are off by 40%.
Any thoughts on what I am doing wrong here?
P.S., for the purpose of dedicated outdoor air I set a 24/7 ?ON? schedule
for fans that blow into each unit.
Thanks for your comments
Ali Mo, EIT
Design Engineer
Ali,
If you can share your INP and PD2 files someone can take a look at your
model to get a better idea of what's going on.
Hi Michael
Thanks for the reply. Attached please find the files.
Ali Mo, EIT
Design Engineer
Hi Ali,
As per me the LS-F report is the report which has basic load based
calculation as per the building data. Whereas the BEPS is the building fuel
consumption.
I think you should not be confused with the OA being not heated as it would
cause little or lesser load to the building.
Also the LS-F report has all the components having the heating or cooling
loads like occupancy, wall, roof and glass heat transfer as well as many
more things.
I think that the eQUEST is not that incapable to not to have the
calculation covering the outside air.
I think the room air is being treated as OA + supply air in the normal LS-F
report.
I don't know what sort of calculation you might have have done but the LS-F
report is the basic load based calculation which are dependent on all the
factors causing the heat load.
The BEPS report might cover the water as well as air-side fuel or
electricity consumption in the various end-uses.
*Thanks,*
*Sharad.Kumar*