Question-and-Answer Resource for the Building Energy Modeling Community
Get started with the Help page
Ask Your Question

Revision history [back]

Don't you have a mechanical engineer on the project responsible to size the data center cooling system?

But yes, you shouldn't have any latent load, so for your coil Total kW = Sensible kW.

Without seeing your idf file (maybe you should share it), I would definitely look at how you defined your internal loads from the server. You probably used an "ElectricEquipment" object, make sure your fraction latent is set to zero there.

ElectricEquipment, , !- Name , !- Zone or ZoneList Name , !- Schedule Name , !- Design Level Calculation Method , !- Design Level {W} , !- Watts per Zone Floor Area {W/m2} , !- Watts per Person {W/person} 0, !- Fraction Latent 1, !- Fraction Radiant 0, !- Fraction Lost ; !- End-Use Subcategory

Don't you have a mechanical engineer on the project responsible to size the data center cooling system?

But yes, you shouldn't have any latent load, so for your coil Total kW = Sensible kW.

Without seeing your idf file (maybe you should share it), I would definitely look at how you defined your internal loads from the server. You probably used an "ElectricEquipment" object, make sure your fraction latent is set to zero there.

ElectricEquipment, , !- Name , !- Zone or ZoneList Name , !- Schedule Name , !- Design Level Calculation Method , !- Design Level {W} , !- Watts per Zone Floor Area {W/m2} , !- Watts per Person {W/person} 0, !- Fraction Latent Latent 1, !- Fraction Radiant 0, !- Fraction Lost ; !- End-Use Subcategory

Don't you have a mechanical engineer on the project responsible to size the data center cooling system?

But yes, you shouldn't have any latent load, so for your coil Total kW = Sensible kW.

Without seeing your idf file (maybe you should share it), I would definitely look at how you defined your internal loads from the server. You probably used an "ElectricEquipment" object, make sure your fraction latent is set to zero there.

ElectricEquipment,

ElectricEquipment, , !- Name , !-

  • Name
  • Zone or ZoneList Name , !- Name
  • Schedule Name , !- Name
  • Design Level Calculation Method , !- Method
  • Design Level {W} , !- {W}
  • Watts per Zone Floor Area {W/m2} , !- {W/m2}
  • Watts per Person {W/person} {W/person}
  • 0, !- Fraction LatentLatent: set to 0
  • 1, !-
  • Fraction Radiant 0, !- Radiant
  • Fraction Lost ; !- Lost
  • End-Use Subcategory