Re: [EnergyPlus_Support] Re: Ungodly number of errors

[Fred Buhl <wfbuhl@xxxxxxx>]

Yes, the low temperature could cause the controller message. Typically 
this would be a HW
coil that is cooling or a ChW coil that is heating. It seems the problem 
is in Plant.

Fred Buhl

brianstreby wrote:
> Just a quick follow-up to clarify-
>
> I'm pretty comfortable with the surface warnings in the error file. The 
> errors that concern me include the following:
>
>   ** Warning ** No valid range found for Loop Demand=726610.25 in Load 
> Range Based Operation Scheme=BLR STAGING.
>   ** Severe  ** Controller error for controller = RTU-2 HW COIL VALVE
>   ** Warning ** SimHVAC: Maximum iterations (20) exceeded for all HVAC 
> loops 
>   ** Warning ** Branch flow rates out of bounds in FlowResolver
>
> I checked into the controller error and found nothing wrong with the 
> controller setup. From the Boiler Report, it appears that the hot water 
> temperatures are extremely low (i.e. < 10 deg C), which I suspect could 
> cause a controller issue. Also, I have two boilers in parallel and set 
> a minimum hot water loop flow rate of 80 gpm (2.52 kg/s) and use a load-
> side bypass. From summer month data in the boiler report, it appears 
> that the minimum loop flow was applied to each boiler, rather than the 
> loop as a whole. In other words, I was expecting to see 40 gpm flow 
> through each boiler in the summer but found that it was 80.
>
> Regards,
>
> Brian
>
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "brianstreby" 
> <brianstreby@...> wrote:
>   
>> My simulation is running and I get results, however, my error output 
>> file has an obscene amount of severe errors and warnings (and results 
>> in the output spreadsheet are a bit whacky too). I found diagnosing 
>> errors that occurred during the compiling stage fairly easy, but the 
>> ones that appear during the simulation seem more obscure. I am not 
>> quite sure where to begin... Any advice?
>>
>> I've uploaded my input/output to the .../_Problem_ Submittals/ PSU_WB 
>> directory in .zip format with today's date.
>>
>>     
>
>
>
>
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>
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>  
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>
>
>   


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



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