[EnergyPlus_Support] Residential Fan Performance

["Ian Doebber" <idoebber@xxxxxx>]

I am trying to most accurately model a blow through on/off fan for a furnace/AC system and a draw through on/off fan for a heat pump system.  

1.  First I am wondering whether I should specify a blow through and draw through differently.  

2. Second, I am wondering what to put for its efficiency.  I have 65% for the total efficiency and 90% for the motor efficiency.  I have all the motor inefficiency lost as heat to the air stream but wanted to know what happens to the energy lost due to the fan efficiency.

3.  Third, how should I specify my pressure difference across my fan. I see that Building America specifies that the air handler should consume 0.00055 kW/CFM.  Therefor, would a good practice be to change my pressure difference to meet this figure based upon what ever my CFM is sized to be.

Thanks
Ian Doebber
Graduate Student
Mechanical Engineering
Virginia Tech

[Non-text portions of this message have been removed]



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