[EnergyPlus_Support] Plant temperatures are getting far too hot [4 Attachments]

["lmblanes@xxxxxxxxx [EnergyPlus_Support]" <EnergyPlus_Support@xxxxxxxxxxxxxxx>]

Hi Modellers

I am having the " Plant temperatures are getting far too hot (...) " error message.

I tried different things, with no success. Find enclosed pictures showing:
- Air loop temperatures. They are stable around 11 to 13 deg. C.
- Pre-Heating Coil and Heating Coil In-Out water temperatures, where there is big difference although there is little to 0 water flow.
- District Heating in-out and Heating / Pre-Heating Coils in-out water flow rate, where there is a huge difference between the the 50kg/s of the plant and the close to 0 Kg/s of the heating coils.

I would appreciate some help on this. Thanks
Luis from Hibernia
-----------------------------------------------

Below the error message.

Program Version,EnergyPlus-Windows-OMP-64 7.2.0.006, YMD=2014.06.25 13:15,IDD_Version 7.2.0.006
   ************* Beginning Zone Sizing Calculations
   ** Warning ** ProcessScheduleInput: Schedule:Constant="SETPOINTMANAGERSCHEDULED_DEFAULT_SUPPLYAIRTEMPSCHEDULE", Blank Schedule Type Limits Name input -- will not be validated.
   ** Warning ** GetSurfaces: Surfaces with interface to Ground found but no "Ground Temperatures" were input.
   **   ~~~   ** Found first in surface=THERMAL ZONE 1-1|BOTTOMSLAB SLAB FOR FLOOR 1(RECTANGLE SHAPE)
   **   ~~~   ** Defaults, constant throughout the year of (18.0) will be used.
   ************* Beginning System Sizing Calculations
   ************* Beginning Plant Sizing Calculations
   ************* Testing Individual Branch Integrity
   ************* All Branches passed integrity testing
   ************* Testing Individual Supply Air Path Integrity
   ************* All Supply Air Paths passed integrity testing
   ************* Testing Individual Return Air Path Integrity
   ************* All Return Air Paths passed integrity testing
   ************* No node connection errors were found.
   ************* Beginning Simulation
   ** Severe  ** Plant temperatures are getting far too hot, check controls and relative loads and capacities
   **   ~~~   **  During Warmup, Environment=ROMA-FIUMICINO ANN HTG 99% CONDNS DB, at Simulation time=01/21 22:52 - 22:56
   **   ~~~   ** PlantLoop Name (SupplySide)= HW LOOP - 1
   **   ~~~   ** PlantLoop Setpoint Temperature=60.0 {C}
   **   ~~~   ** PlantLoop Inlet Node (SupplySide) does not have a Setpoint.
   **   ~~~   ** PlantLoop Inlet Node (DemandSide) does not have a Setpoint.
   **   ~~~   ** PlantLoop Outlet Node (SupplySide) does not have a Setpoint.
   **   ~~~

__._,_.___

View attachments on the web

---

Posted by: lmblanes@xxxxxxxxx

---

Primary EnergyPlus support is found at:
http://energyplus.helpserve.com or send a message to energyplus-support@xxxxxxxx

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.

Visit Your Group

• New Members 19

• Privacy • Unsubscribe • Terms of Use

__,_._,___

Attachment not found:
d:\eudora\attach\DistrictHeating and Heating and preheating Coil_HWflowrate.jpg

Attachment not found:
d:\eudora\attach\airloop_temp.jpg

Attachment not found:
d:\eudora\attach\HeatingCoil_HWtemp.jpg

Attachment not found:
d:\eudora\attach\PreHeatingCoil_HWtemp.jpg