[Equest-users] Unusual QC Errors

[Matutinovic, Luka]

Luke,

 

Thanks for your help.  It turned out to be a problem with the
daylighting.  There's still some QC errors, but the values have
definitely changed, so I'm more confident that the simulation is more or
less free of bugs that would prevent it from running.

 

Luka

 

From: Lukas Hovee [mailto:lhovee at setg.org] 
Sent: Tuesday, March 09, 2010 3:05 PM
To: equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Unusual QC Errors

 

Luka-

The errors that you have attached below are not necessarily related to
the reason your simulation is failing.  The QC reporting mechanism
relies on results generated during the course of a successful
simulation, and the fact that you are unable to a simulation is the
reason for some of the nonsensical numbers in the QC reporting results.
Check the .sim file for information on why the simulation won't run.

-Luke



Lukas Hovee
Madison Engineering, PS
444 NE Ravenna Blvd, Suite 406
Seattle, WA 98115

On 3/9/2010 11:19 AM, Matutinovic, Luka wrote: 

Hello All,

 

My simulation won't run because of unusual errors that I've never seen
before, but that I picked up when looking at the details of the QC
report:

 

Here is a summary of the errors.  If anyone has seen this before and may
have ideas about what's causing it, I'd really appreciate the help.  

 

I haven't attached the .pd2 and .inp file due to file size, but I can
forward them to anyone who's interested in taking a peek.

 

Many thanks,

 

Luka

 

====================================================================

4) Hours of Operation                                        

            Hours of Operation                                

                        Fan vs. Occupancy Hours                      

                                                The average occupancy /
fan operation ratio for the building is -72480000.00 and appears high
(error above 1.75, see PS-E & SS-C reports).

                        Fan vs. Lighting Operating Hours


                                                The average hours of
light operation / fan operation ratio for the building is 0 and appears
low (error below 0.25, see PS-E & SS-C reports).

                        Fan vs. Equipment Operating Hours


                                                The average hours of
plug load operation / fan operation ratio for the building is 0 and
appears low (error below 0.25, see PS-E & SS-C reports).

5) HVAC Equipment Descriptions


            Air-Side Checks                                    

                        CFM/ton of cooling                    

                                                The supply air flow for
system 'E1 Sys1 (PIU) (B)' is 120000.0 cfm/ton and appears high (see
SV-A report).

                        

            User Input Equipment Performance Curves


                        Curve coefficients sum to 1                   

                                                The sum of the
coefficients for the 'ForCurve w Inlet Vanes FPLR' curve is 0.99 and
does not equal 1 (check Curve Inputs for errors).

6) Zone Control and Equipment Sizing


            Primary Equipment Unable to Meet Loads


                        Chillers             

                                                Chillers on Loop:
'Chilled Water Loop' have a total Capacity to Load Ratio of -1.00 and
may be undersized (Error: Ratio <   0.90) 

Total Chiller Capacity on Loop = -2 (Btu/hr)

Peak CHW Loop Load = -1 (Btu/hr)

Chiller: 'Chiller1a (ElCentHerm)' capacity = -1 (Btu/hr)

                                                Chiller: 'Chiller1b
(ElCentHerm)' capacity = -1 (Btu/hr)

                        Boilers              

                                                Boilers on Loop: 'Hot
Water Loop' have a total Capacity to Load Ratio of -0.00 and may be
undersized (Error: Ratio < 0.90) 

Total Boiler Capacity on Loop = -2 (Btu/hr)

Peak HW Loop Load = -1 (Btu/hr)

Boiler: 'Boiler1a (HWNatDrft)' capacity = -1 (Btu/hr)

                                                Boiler: 'Boiler1b
(HWNatDrft)' capacity = -1 (Btu/hr)

            Circulation Loop Overload                                  

                        Circulation Loop Overload                      

7) HVAC Load & Performance Results


            Monthly Pattern of HVAC Loads


                        Heating Coil Loads                     

                                                System 'E1 Sys1 (PIU)
(B)' has a high Summer/Winter heating coil load ratio of 1.0 (error over
0.2, see SS-D report).

                                                

            Primary HVAC Equipment Performance                          

                        Average Chiller COP                  

                                                'Chiller1a (ElCentHerm)'
Average Yearly COP (Total Annual Output/Total Annual Input) = -1.0 and
may be low (Error: Ratio <= 1).

                                                'Chiller1b (ElCentHerm)'
Average Yearly COP (Total Annual Output/Total Annual Input) = -1.0 and
may be low (Error: Ratio <= 1).

                        Average Cooling Tower COP                  

                                                'Open Tower' Average
Yearly COP (Total Annual Output/Total Annual Input) = -1.0 may be low
(Error: Ratio <= 1).

                        

 
 
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