Re: [EnergyPlus_Support] Crash during switch from heating to cooling!

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

This is crashing in the purchased heating object (serving the radiant systems) 
at a time when there is a very tiny heating load but the mass flow goes to 
zero.  A fix has been made to handle this condition without crashing in the 
next release.  Replacing this with a boiler allows the simulation to complete.

Mike


On 7 Jun 2005, at 8:37, christian1855 wrote:

> Hi Mike, Linda,
> 
> we are trying to simulate a 4 zone building. Each zone has a low 
> temperature radiant system hydronic for heating (winter period) and 
> cooling (summer period) and a baseboard heater electric. There is also 
> an air loop which serves air at 18°C using direct air systems.
> The winter period simulation runs well, but at the same day as the 
> schedules turns off the radiant heating system and turns on the 
> radiant cooling system, E+ (1.2.1) crashes. OK, now it seems clear the 
> cooling part has a problem, but the simulation runs without problems 
> for the cooling period only. So there seems to be a problem with the 
> switch from heating to cooling. Please, can you take a look at this 
> file.
> I will put the idf (4ZoneLowRadSys_V01.zip) in the Problem_Submittals 
> folder. 
> 
> Thanks 
> Christian
> 
> 
> 
> 
> The primary EnergyPlus web site is found at:
> http://www.energyplus.gov
> 
> The group web site is:
> http://groups.yahoo.com/group/EnergyPlus_Support/
> 
> Attachments are not allowed -- please post any files to the appropriate folder
> in the Files area of the Support Web Site.
> 
> Yahoo! Groups Links
> 
> 
> 
> 
> 
> 
> 
> 



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




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