[EnergyPlus_Support] RE: Re: Football Stadium Modeling

IF (ODA_T < 4), the equipment comes on when outdoor temperature falls below 4 degC.

---In EnergyPlus_Support@xxxxxxxxxxxxxxx, <energyplus_support@xxxxxxxxxxxxxxx> wrote:

Many thanks for your help, but please, can you make the EMS input a little more clearer, I haven't used EMS before. This would be very kind of you.
Thank you very much.

Best regards,
Hisham

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, <jeannieboef@...> wrote:
>
> I wrote a short ems to do this for freeze protection trace heating on piping... you can adjust it for pitch heating.
>
>
> !!!External equipment
> Exterior:FuelEquipment,
> PipeFrostProtection,
> Electricity,
> FrostFreeSch,
> 5850, !26 W/m @ 225 m =
> PipeFrostProtection;
> Schedule:Compact,
> FrostFreeSch, !- Name
> Any Number, !- Schedule Type Limits Name
> Through: 12/31, !- Field 1
> For: AllDays, !- Field 2
> Until: 24:00,0; !- Field 3
> !!!!!FROST FREE EMS!!!!!!!!!!!!!!!!!!!!!
> !ODA dry-bulb temperature sensor
> EnergyManagementSystem:Sensor,
> ODA_T, ! Sensor Name...reporting schedule properties
> Environment, ! Output:Variable or Output:Meter Index Key Name Zone/Sys Thermostat Cooling Setpoint Output:Variable,*,Zone/Sys Thermostat Cooling Setpoint,hourly; !- Zone Average [C]
> Site Outdoor Air Drybulb Temperature; ! Output:Variable or Output:Meter Name
> EnergyManagementSystem:Actuator,
> FrostFreeOn, !- Name
> FrostFreeSch, !- Actuated Component Unique Name...in this case !-EnergyManagementSystem:Actuator Available,COOLING SP SCH,Schedule:Compact,Schedule Value,[ ]
> Schedule:Compact, !- Actuated Component Type
> Schedule Value ; !- Actuated Component Control Type
> !***Program Calling Proceedure***
> EnergyManagementSystem:ProgramCallingManager,
> FrostFreeCM, ! Name
> AfterPredictorAfterHVACManagers, ! EnergyPlus Model Calling Point
> FrostFree; ! Program 1 Name
> !
> !***Main Program***
> !******************
> EnergyManagementSystem:Program,
> FrostFree, ! Program 1 Name
> !
> IF (ODA_T < 4),
> SET FrostFreeOn = 1,
> ELSE,
> SET FrostFreeOn = Null,
> ENDIF;
>
>
>
>
> ---In EnergyPlus_Support@xxxxxxxxxxxxxxx, <energyplus_support@xxxxxxxxxxxxxxx> wrote:
>
> Dear all,
> I have a project for a football stadium which has underground heating for the playing pitch area. The stadium is open to the outdoors. The question is: Can such stadium pitch heating be modeled in EnergyPlus? if yes, how? and also how to account for the impact on outdoor environment factors effects (like wind or rain) caused by seating and exterior walls (which are shaped as displaced high columns around seating with open spaces between them), also there is the open structure above that resembles the roof.
>
>
> Please, see the stadium image refered by this link:
> http://img198.imageshack.us/img198/6113/y3dz.jpg http://img198.imageshack.us/img198/6113/y3dz.jpg
>
>
> Thank you very much.
>
>
> Hisham.
>