[EnergyPlus_Support] Re: Sizing according to ASHRAE 90.1

["FrancescoP" <direzionecontraria@xxxxxxxx>]

This discussion was very useful, but now I have a two questions regarding fans. 

1. ASHRAE 90.1-2007 provides a method to calculate the "Fan motor Efficiency". As I'm modelling a VAV system with reheat, I'm using the object Fan:VariableVolume that has two fields relative to efficiency: "Fan efficiency" and "Motor efficiency".
Is the "Fan motor Efficiency" of ASHRAE equal to "Motor efficiency" of
EnergyPlus? And about the "Fan efficiency" of EnergyPlus?
Or is the "Fan motor Efficiency" of ASHRAE equal to product of "Motor
efficiency" of EnergyPlus and "Fan efficiency" of EnergyPlus?

2. Is calculating the field "pressure rise" as Power*efficiency/massflow 
at the design conditions a good solution?

Best Regards




------------------------------------

Primary EnergyPlus support is found at:
http://energyplus.helpserve.com or send a message to energyplus-support@xxxxxxxx

The primary EnergyPlus web site is found at:
http://www.energyplus.gov

The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/

Attachments are currently allowed but be mindful that not everyone has a high speed connection.  Limit attachments to small files.

EnergyPlus Documentation is searchable.  Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.
Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/EnergyPlus_Support/

<*> Your email settings:
    Individual Email | Traditional

<*> To change settings online go to:
    http://groups.yahoo.com/group/EnergyPlus_Support/join
    (Yahoo! ID required)

<*> To change settings via email:
    EnergyPlus_Support-digest@xxxxxxxxxxxxxxx 
    EnergyPlus_Support-fullfeatured@xxxxxxxxxxxxxxx

<*> To unsubscribe from this group, send an email to:
    EnergyPlus_Support-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/