[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[EnergyPlus_Support] Design coil load is zero for Coil:Heating:Water



I have modeled a building with an unconditioned courtyard and assigned a Variable Air Volume system with reheat. This building also has an unconditioned basement. I have also run this building with Ideal loads air system and determined the peak days for heating and cooling requirement based on the loads. I then sized the air loop and plant loop components for those peak days. For some reason, I am receiving this warning in my runs:

   ** Warning ** The design coil load is zero for Coil:Heating:Water 310E97 REHEAT COIL
   **   ~~~   ** The autosize value for maximum water flow rate is zero
   **   ~~~   ** To change this, input a value for UA, change the heating design day, or lower
   **   ~~~   **   the system heating design supply air temperature

I have realized that a similar question was posted on this warning before so I already followed the recommendations of the support team. Based on these recommendations, I made sure that there is no internal load (lights, equipment and people) in the building during the heating design day that would lower the heating requirement down. I assigned a reasonable infiltration value for each zone using one of the available simple infiltration models of EnergyPlus. I also tried the solutions recommended by the warning above. However, none of these efforts worked and I am still receiving this warning. In addition, when I checked the zone temperatures obtained from a yearly run with the autosized system, I realized that they were definitely not meeting the assigned setpoints. Could you please take a look at the attached file and let me know what might I be missing? What should I change to size the airloop and waterloop reasonably?

Thanks in advance for your help,
Simge Andolsun




------------------------------------

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 currently allowed but be mindful that not everyone has a high speed connection.  Limit attachments to small files.

EnergyPlus Documentation is searchable.  Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.
Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/EnergyPlus_Support/

<*> Your email settings:
    Individual Email | Traditional

<*> To change settings online go to:
    http://groups.yahoo.com/group/EnergyPlus_Support/join
    (Yahoo! ID required)

<*> To change settings via email:
    EnergyPlus_Support-digest@xxxxxxxxxxxxxxx 
    EnergyPlus_Support-fullfeatured@xxxxxxxxxxxxxxx

<*> To unsubscribe from this group, send an email to:
    EnergyPlus_Support-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/