[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[EnergyPlus_Support] Simple way to account for motor casing heat

Dear Forum,

Life is good!  Big problems are (mostly) solved, so I'm turning my attention to smaller ones.

Has anyone come up with a simple way to add motor casing heat to a zone so that the HVAC system treats it as a heating / coolning load?

For example:
* I have 200kW of pump motors in a mechanical room
* Each motor is 90% efficient
* This means that 20kW (10%) is lost from the motor to the adjoining mechanical room zone
* the entire 220kW will be accounted for by E+ in its energy calculations, but the HVAC system in the mechanical room never "sees" the 20kW and therefore cannot respond properly.

My best solution thus far is to add the 20kW into the zone as "OtherEquipment" or "ElectricEquipment", and then back it out from the electricity totals (so it won't be counted twice).

That's too much effort for a relatively small amount of energy in my opinion!

Better idea, anyone?  (Thanks in advance.)



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

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/