Re: [EnergyPlus_Support] WLHP System with Boiler/Tower

["Michael J. Witte" <mjwitte@xxxxxxxx>]

Currently, not all equipment types register plant flow requirements for 
autosizing.  Some of these have been fixed, but in general if the water flow 
rate is not autosizeable (as it the case for COIL:WaterToAirHP:*) then the 
plant loop probably does not see that flow rate when autosizing the loop flow.  
Check the autosized plant loop flow rate in the eio output file to see if it 
seems reasonable.  I suspect you will need to use hard sizes for the plant loop 
flow rates.

Mike


On 20 Feb 2008 at 14:20, bkdawe1979 wrote:

> Hi all
> I'm modelling a building with a WLHP system and having some trouble 
> with the following warning, which is fairly typical for all zones. 
> Basically, I'm not sure how the loop temperatures are reaching 
> the levels indicated in the error report since I've set my schedules 
> and plant sizing objects to an appropriate range for this type of 
> system. Also, the cooling tower should be sized highed enough to handle 
> the load. The error doesn't seem to be having a major impact on space 
> temperature so I'm not even sure that it's a concern. Can anybody 
> suggest how I can get rid of this error? Any help would be 
> appreciated.
> 
> Thanks
> Brad
> 
> 
> Warning ** WaterToAir Heat pump:cooling [HEAT PUMP COOLING MODE AHU226] 
> shut off on high pressure > 4000000
> This error occurred 39201 times.  Max=73.049928 SourceSideInletTemp[C]  
> Min=62.835061 SourceSideInletTemp[C]
> 
> 
> 
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> 
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> 
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> 
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> Documentation link and press the "search" button.
> 
> Yahoo! Groups Links
> 
> 
> 
> 


========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support      
EnergyPlus-Support@xxxxxxxx



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