Re: [EnergyPlus_Support] Pump datasheet info vs EnergyPlus input

["jeannieboef@xxxxxxxxx" <jeannieboef@xxxxxxxxx>]

If I had to guess...it looks like the rated power excludes the efficiencies. Or it's given like this for the electrical engineer, who has do cover a wider range of power draw (during start for example).

Your calcs seem right. P=Vdot x dP / eff.

Mit freundlichen GrüÃ?en- Sent from my iPhone (excuse the brevity)

i. A.

Jean Marais

b.i.g. bechtold

Tel.   +49 30 6706662-23

On 25.02.2014, at 05:13, Patrick Bivona <patrick.bivona@xxxxxxxxx> wrote:

 

Hi,

I'm trying to make sense of the attached pump datasheet and see how the information there relates to input fields for the Pump:ConstantSpeed object.

The Pump:ConstantSpeed object needs:

• rated power consumption (W)
• rated flow rate (m3/s)
• rated head (Pa)
• motor efficiency

Here's information available in the datasheet that seems relevant (there's more in there):

• motor rated power P2: 7.5 kW
• flow rate: 946.9 L/min (0.0158 m3/s)
• head: 20 mAq (196200 Pa)
• pump+motor efficiency at full load: 68.4%
• pump efficiency at full load: 74.4%
• motor efficiency at full load: 90.4% (which is also 68.4% / 74.4%)

Now, here are my observations and questions.