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Problems with HVAC System

asked 2015-01-05 07:28:20 -0500

Marcelba gravatar image

updated 2015-01-09 12:35:19 -0500

Hello, at the moment i am writting my Bachelor Thesis about Open studio and Energy Plus. when ever i add an HVAC System to my Modle the Simulation doest work. I dont know how to fix that Problem. I ve read the erro file, but i dont find the Problem Here is the Error file:

Blockquote

Program Version,EnergyPlus-Windows-64 8.1.0.009, YMD=2015.01.05 14:18,IDD_Version 8.1.0.009
   ************* Beginning Zone Sizing Calculations
   ** Warning ** GetHTSurfaceData: Surfaces with interface to Ground found but no "Ground Temperatures" were input.
   **   ~~~   ** Found first in surface=SURFACE 9
   **   ~~~   ** Defaults, constant throughout the year of (18.0) will be used.
   ** Warning ** CheckUsedConstructions: There are 7 nominally unused constructions in input.
   **   ~~~   ** For explicit details on each unused construction, use Output:Diagnostics,DisplayExtraWarnings;
   ** Warning ** SetUpZoneSizingArrays: Requested Sizing for Zone="THERMAL ZONE 1", Zone has no thermostat (ref: ZoneControl:Thermostat, et al)
   ** Warning ** SetUpZoneSizingArrays: Requested Sizing for Zone="THERMAL ZONE 2", Zone has no thermostat (ref: ZoneControl:Thermostat, et al)
   ** Warning ** Calculated design cooling load for zone=THERMAL ZONE 1 is zero.
   **   ~~~   ** Check Sizing:Zone and ZoneControl:Thermostat inputs.
   ** Warning ** Calculated design heating load for zone=THERMAL ZONE 1 is zero.
   **   ~~~   ** Check Sizing:Zone and ZoneControl:Thermostat inputs.
   ** Warning ** Calculated design cooling load for zone=THERMAL ZONE 2 is zero.
   **   ~~~   ** Check Sizing:Zone and ZoneControl:Thermostat inputs.
   ** Warning ** Calculated design heating load for zone=THERMAL ZONE 2 is zero.
   **   ~~~   ** Check Sizing:Zone and ZoneControl:Thermostat inputs.
   ************* Beginning System Sizing Calculations
   ** Warning ** ManageSizing: Calculated Cooling Design Air Flow Rate for System=PACKAGED ROOFTOP AIR CONDITIONER is zero.
   **   ~~~   ** Check Sizing:Zone and ZoneControl:Thermostat inputs.
   ** Warning ** ManageSizing: Calculated Heating Design Air Flow Rate for System=PACKAGED ROOFTOP AIR CONDITIONER is zero.
   **   ~~~   ** Check Sizing:Zone and ZoneControl:Thermostat inputs.
   ** Severe  ** Controller:MechanicalVentilation="CONTROLLER MECHANICAL VENTILATION 2", Design Specification Outdoor Air Object Name blank
   **   ~~~   ** For Zone="THERMAL ZONE 1".
   **   ~~~   ** This field either needs to be filled in in this object or Sizing:Zone object.
   **   ~~~   ** For this run, default values for these fields will be used.
   ** Severe  ** Controller:MechanicalVentilation="CONTROLLER MECHANICAL VENTILATION 2", Design Specification Outdoor Air Object Name blank
   **   ~~~   ** For Zone="THERMAL ZONE 2".
   **   ~~~   ** This field either needs to be filled in in this object or Sizing:Zone object.
   **   ~~~   ** For this run, default values for these fields will be used.
   ** Severe  ** For Controller:OutdoorAir: CONTROLLER OUTDOOR AIR 2
   **   ~~~   **   maximum outdoor air flow rate (10.0000) < minimum outdoor air flow rate (11.0000)
   **   ~~~   **   To set the minimum outside air flow rate use the "Design (minimum) outdoor air flow rate" field in the Sizing:System object
   ** Warning ** Controller:MechanicalVentilation = "CONTROLLER MECHANICAL VENTILATION 2", Zone="THERMAL ZONE 1".
   **   ~~~   ** No "PEOPLE" object has been specified in the idf for this zone, but the ventilation rate is > 0 in this Controller:MechanicalVentilation Object.
   **   ~~~   ** Check ventilation rate in Controller:MechanicalVentilation object.  Simulation will continue.
   ** Warning ** Controller:MechanicalVentilation = "CONTROLLER MECHANICAL VENTILATION 2", Zone="THERMAL ZONE 2".
   **   ~~~   ** No "PEOPLE" object has been specified in the idf for this zone, but the ventilation rate is > 0 in ...
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See the previously answered question.

MatthewSteen gravatar image MatthewSteen  ( 2015-01-05 08:24:16 -0500 )edit

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answered 2015-01-05 09:02:21 -0500

updated 2015-01-05 09:03:01 -0500

maximum outdoor air flow rate (10.0000) < minimum outdoor air flow rate (11.0000)
* ~~~ * To set the minimum outside air flow rate use the "Design (minimum) outdoor air flow rate" field in the Sizing:System object

Bolded line appears to be your error. Your maximum OA flow is specified to be lower than the minimum specified OA flow.

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yes i know i ve already fixed that, but this is not the main Problem

Marcelba gravatar image Marcelba  ( 2015-01-05 09:06:34 -0500 )edit

You've also got no OA objects specified for those two thermal zones... did you add some in, as well as People objects to breath the outdoor air?

Benjamin gravatar image Benjamin  ( 2015-01-05 10:34:22 -0500 )edit
1

answered 2015-01-06 09:13:27 -0500

Check out aparker's checklist https://unmethours.com/question/1566/...

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Asked: 2015-01-05 07:28:20 -0500

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Last updated: Jan 06 '15