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Re: [EnergyPlus_Support] Need help for simulating sensor faults in E+



Hello Jim,

Thank you so much for your suggestions! You are very helpful.



On Mon, Dec 5, 2016 at 4:36 PM, Jim Dirkes <jim@xxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
Hmmmm... No new ideas. I have used the Fault objects very little, so I cannot help further other than to suggest posting the same question on UnmetHours.com.  There are probably some people there who may be able help.

Another possibility is to submit a ticket to the Help Desk. I suspect that you are one of a very small number of people who are using that object and it may not have been tested fully regarding the Output:Variable.

p.s., I commend you for thoroughly checking results.

On Mon, Dec 5, 2016 at 4:20 PM, Ying Yan <ying.yan@xxxxxxxxx> wrote:
Hello Jim,

Thank you very much for your suggestion.

Now I observed the "System Node Temperature" of the outdoor air node as

Output:Variable,
    Air Loop AHU2 AHU/1 Outdoor Air Inlet,  !- Key Value
    System Node Temperature ,!- Variable Name
    Timestep;                !- Reporting Frequency

However, there is no difference between this output variable and "Site Outdoor Air Drybulb Temperature" which is directly obtained from the weather file.

Do you have any other suggestions?

Thank you.


On Mon, Dec 5, 2016 at 12:08 PM, Jim Dirkes <jim@buildingperformanceteam.com> wrote:
I suspect that the output:Variable you chose is taken directly from the weather file.  I suggest that you try the "System Node Temperature" for the outdoor air node name where the error is applied.

On Mon, Dec 5, 2016 at 11:15 AM, Ying Yan ying.yan@xxxxxxxxx [EnergyPlus_Support] <EnergyPlus_Support@yahoogroups.com> wrote:
 

Dear All,

I simulated offset of outdoor air temperature sensor in "FaultModel:TemperatureSensorOffset:OutdoorAir" as



  FaultModel:TemperatureSensorOffset:OutdoorAir,
    OATFault,                !- Name
    ALWAYS_ON,               !- Availability Schedule Name
    OATSeveritySch,          !- Severity Schedule Name
    Controller:OutdoorAir,   !- Controller Object Type
    VAV_1_OA_Controller,     !- Controller Object Name
    2.0;                     !- Temperature Sensor Offset {deltaC}



where the schedule "OATSeveritySch" is

Schedule:Compact,
    OATSeveritySch,          !- Name
    On/Off,                  !- Schedule Type Limits Name
    Through: 8/19,           !- Field 1
    For: AllDays,            !- Field 2
    Until: 24:00,            !- Field 3
     0,                      !- Field 4
    Through: 8/20,           !- Field 5
    For: AllDays,            !- Field 6
    Until: 24:00,            !- Field 7
     1,                      !- Field 8
    Through: 12/31,          !- Field 9
    For: AllDays,            !- Field 10
    Until: 24:00,            !- Field 11
     0;                      !- Field 12

However, I found that the 

Output:Variable,
    *,                       !- Key Value
    Site Outdoor Air Drybulb Temperature ,  !- Variable Name
    Hourly;                  !- Reporting Frequency


has no change.  In other words, there is no offset in this output variable.

May I know the reason?  Your answer will be very appreciated.

--
Best Regards

Ying Yan

Graduate Student
Electrical & Computer Engineering
School of Engineering
University of Connecticut




--

James V Dirkes II, PE, BEMP, LEED AP
CEO/President
The Building Performance Team Inc.
1631 Acacia Dr, GR, Mi 49504

Direct: 616.450.8653
jim@xxxxxxxxxxxxxxxxxxxxxxxxxxm

Website l  LinkedIn | May 2016 ASHRAE Journal article on energy modeling

All people should seek Truth, and seek it with love's reckless passion. Without that passion, difficulties seem insurmountable and soon erode the search. Society often regards intensity of conviction as dangerous, when it should be cherished so long as it continues to demonstrate love.



--
Best Regards

Ying Yan

Graduate Student
Electrical & Computer Engineering
School of Engineering
University of Connecticut



--

James V Dirkes II, PE, BEMP, LEED AP
CEO/President
The Building Performance Team Inc.
1631 Acacia Dr, GR, Mi 49504

Direct: 616.450.8653
jim@buildingperformanceteam.com

Website l  LinkedIn | May 2016 ASHRAE Journal article on energy modeling

All people should seek Truth, and seek it with love's reckless passion. Without that passion, difficulties seem insurmountable and soon erode the search. Society often regards intensity of conviction as dangerous, when it should be cherished so long as it continues to demonstrate love.



--
Best Regards

Ying Yan

Graduate Student
Electrical & Computer Engineering
School of Engineering
University of Connecticut


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Posted by: Ying Yan <ying.yan@xxxxxxxxx>


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