Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
I have been doing troubleshooting for a model I´m working and has the same issue. I started building a chilled water loop within the openstudio GUI. So far, within the openstudio GUI, I have not found a solution. My situation analysis is that pump operation (whether if it´s on or off) is dependent of loop demand, and loop demand is not necessarily related to the operation of other cooling or heating equipment within the loop. Even though I have selected intermittent pump operation, undesirable heat is still being built-up within the loop. A pump can still be on when it is not needed because loop demand is related to temperature difference between supply and demand nodes. And loop temperature can continue increasing while maintaining a temperature difference. But, out of openstudio GUI within energyplus are more options to do something about it, and I added an availability manager to stop the loop when it reaches to an undesirable temperature. The object is AvailabilityManager:HighTemperatureTurnOff. Looks like the additional availability manager is helping the simulation to complete with no errors and no major warnings. But still remains the issue about if the intermittent pump operation is working correctly or not within energyplus.
| | 2 | No.2 Revision |
I have been doing troubleshooting for a model I´m working and has the same issue. I started building a chilled water loop within the openstudio GUI. So far, within the openstudio GUI, I have not found a solution. My situation analysis is that pump operation (whether if it´s on or off) is dependent of loop demand, and loop demand is not necessarily related to the operation of other cooling or heating equipment within the loop. Even though I have selected intermittent pump operation, undesirable heat is still being built-up within the loop. A pump can still be on when it is not needed because loop demand is related to temperature difference between supply and demand nodes. And loop temperature can continue increasing increase while maintaining a temperature difference. difference creating an "undesirable loop demand". But, out of openstudio GUI within energyplus are more options to do something about it, and I added an availability manager to stop the loop when it reaches to an undesirable temperature. The object is AvailabilityManager:HighTemperatureTurnOff. Looks like the additional availability manager is helping the simulation to complete with no errors and no major warnings. But still remains the issue about if the intermittent pump operation is working correctly or not within energyplus.
| | 3 | No.3 Revision |
I have been doing troubleshooting for a model I´m working and has the same issue. I started building a chilled water loop within the openstudio GUI. So far, within the openstudio GUI, I have not found a solution. My situation analysis is that pump operation (whether if it´s on or off) is dependent of loop demand, and loop demand is not necessarily related to the operation of other cooling or heating equipment within the loop. Even though I have selected intermittent pump operation, undesirable heat is still being built-up within the loop. A pump can still be on when it is not needed because loop demand is related to temperature difference between supply and demand nodes. And loop temperature can increase while maintaining a temperature difference creating an "undesirable loop demand". But, out
Out of openstudio GUI within energyplus are more options to do something about it, and I added an availability manager to stop the loop when it reaches to an undesirable temperature. The object is AvailabilityManager:HighTemperatureTurnOff. Looks like the additional availability manager is helping AvailabilityManager:HighTemperatureTurnOff.
Another option is to use a measure "Enable Detailed Output for Each Node in a Loop" within OpenStudio in the Reporting/Troubleshooting tab. You can run the simulation to complete in a shorter time period before it fails with no errors and no major warnings. But still remains the issue about if the intermittent pump operation is working correctly or not within energyplus.this measure. Then you can verify the temperature patterns and tendencies for every loop that you want. That way maybe you can figure out better what is the cause of making the simulation fail.
