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[EnergyPlus_Support] AHU Fan Flow rate and Power
- To: EnergyPlus_Support@xxxxxxxxxxxxxxx
- Subject: [EnergyPlus_Support] AHU Fan Flow rate and Power
- From: "greenbuild15" <francois@xxxxxxxxxxxxxxx>
- Date: Tue, 28 Jul 2009 23:05:45 -0000
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- Delivery-date: Tue, 28 Jul 2009 17:05:53 -0600
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Dear all,
I have a problem interpreting simulation output data related to the AHU fan in an HVAC system. (The data is for a relatively large office building)
The output reported by EnergyPlus for "Fan Electric Consumption - AHU Supply Fan" is approx. 700kWh per day.
The reported "AirLoopHVAC Mixed Air Mass Flow Rate" is approx 130 kg/s on average. Using a realistic fan power rating of 2.0 kW/kg/s air flow results in 260kW power.
The HVAC runs for 10 hours per day giving on average (per day) 2600kWh consumption - much more than the 700 kWh reported by EPlus.
I am certain that I am making a fundamental error in interpreting the output, but cannot pinpoint the origin.
Any suggestions would be appreciated !
Best regards,
Francois
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