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RE: [EnergyPlus_Support] Heating coil sensible part-load ratio

Thank you!
 

The Building Performance Team
James V. Dirkes II, P.E., LEED AP
1631 Acacia Drive NW
Grand Rapids, MI 49504
616 450 8653

 

 

  _____  

From: EnergyPlus_Support@xxxxxxxxxxxxxxx
[mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Griffith, Brent
Sent: Friday, March 28, 2008 11:05 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: RE: [EnergyPlus_Support] Heating coil sensible part-load ratio



Look at it the wording this way, it isn't "Sensible Part" Load
Ratio--its Sensible "Part Load Ratio". The part load isn't referring to
sensible versus latent, its referring to what part of this time step the
coil is on. It's a fraction of full load sensible heating. Remember
the simulation often has a time step that is longer than cycling period,
this leads to part load ratios for all sorts of things... 

Not sure why you would be getting the error (or rather I don't imagine
its very helpful to note it is because the numerical solver
SolveRegulaFalsi returned a SolFlag = -1). But the convergence is
pretty close (0.14%), so it sounds safe to ignore. 

________________________________

From: EnergyPlus_Support@ <mailto:EnergyPlus_Support%40yahoogroups.com>
yahoogroups.com
[mailto:EnergyPlus_Support@ <mailto:EnergyPlus_Support%40yahoogroups.com>
yahoogroups.com] On Behalf Of JV Dirkes II
Sent: Friday, March 28, 2008 6:27 PM
To: EnergyPlus_Support@ <mailto:EnergyPlus_Support%40yahoogroups.com>
yahoogroups.com
Subject: [EnergyPlus_Support] Heating coil sensible part-load ratio

Dear EPlus Forum,

I'd like some help understanding the error below. I don't know what a
"sensible part load ratio" refers to for a COIL:GAS:HEATING object
within a Furnace:HeatCool object. It sounds like the sensible heat
ratio for a DX cooling coil, but that makes no sense for heating....

** Warning ** Heating coil control failed to converge for
Furnace:HeatCool:AH_03
** ~~~ ** Iteration limit exceeded in calculating heating
coil sensible part-load ratio.
** ~~~ ** Sensible load to be met by heating coil = 107013.56
(watts), sensible output of heating coil = 107158.23 (watts), and the
simulation continues.

Thanks!

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[Non-text portions of this message have been removed]


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