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Problems with HVAC System

asked 10 years ago

Marcelba's avatar

updated 10 years ago

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's avatar MatthewSteen  ( 10 years ago )

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answered 10 years ago

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

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answered 10 years ago

updated 10 years ago

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's avatar Marcelba  ( 10 years ago )

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's avatar Benjamin  ( 10 years ago )

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Asked: 10 years ago

Seen: 1,017 times

Last updated: Jan 06 '15