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

Re: [EnergyPlus_Support] ASHRAE Compliant Fans and Pumps





Alan,

In regards to your reply,

Does ASHRAE specify any efficiency value for the fans? If yes, could you please direct me to the same.

Thank you.

Regards,
Vinay

On Tue, Jun 29, 2010 at 11:33 AM, Jackson, Alan <ajackson@xxxxxxxxxxxxxxxxx> wrote:
 

You're going to want to adjust your Static Pressure DeltaP. Once you
have your Watts for the Baseline from auto sizing the flow you can use
DeltaP[Pa] = Power[W]*Eff/Flow[m3/s]

Since ASHRAE is telling you Flow and Power you have to solve for static.

Alan Jackson, LEED AP
KlingStubbins



-----Original Message-----
From: EnergyPlus_Support@xxxxxxxxxxxxxxx
[mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of eddiecorwin
Sent: Tuesday, June 29, 2010 11:13 AM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] ASHRAE Compliant Fans and Pumps

I am curious as to how people have gone about modeling ASHRAE compliant
pumps and fans.

The pumps seem relatively strait forward, run the model, see what the
flow is, then enter in a wattage that equates to 22W/GPM. The fans,
however, do not have an input for the rated wattage. The only option I
see is to alter the fan's Motor Efficiency until you get close to the
correct W/CFM.

Are these the same methods people have applied in the past, or is there
a better way to the the correct W/GPM and W/CFM?

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


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




__._,_.___


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.




Your email settings: Individual Email|Traditional
Change settings via the Web (Yahoo! ID required)
Change settings via email: Switch delivery to Daily Digest | Switch to Fully Featured
Visit Your Group | Yahoo! Groups Terms of Use | Unsubscribe

__,_._,___