Re: [TRNSYS-users] pump rated power

[Jeff Thornton <thornton@tess-inc.com>]

Emre,

You calculate the rated power in exactly the same way you’d calculate the power for any pump or fan in any application.  

Power = Flow Rate x Pressure Drop / Pump Efficiency

You’ll have to estimate the pressure drop from the pipe length, diameter, pipe type, number of valves, bends etc.  A simple internet search will give you dozens of articles on sizing pumps...

If the pump power isn’t a critical factor you can also use a rule of thumb like Power = 15 Watts/gpm 

Jeff - TESS


> On Oct 19, 2019, at 11:28 AM, Emre Arpaci via TRNSYS-users <trnsys-users@lists.onebuilding.org> wrote:
> 
> 
> Hi trnsys user
> I need to your help to size the pumps.
> when you are working with pumps how do you calculate the rated power.
> For example  I m using a pump for circulation to solar collector to tank.my flowrate is 500 kg/hr  but which value should be for rated power.
> 
> ın shortly ı need to help to size the pumps. How do you do pump sizing with working on trnsys ? 
> 
> I need your messages.
> regards
> 
> Emre Arpaci
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