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Re: [EnergyPlus_Support] Pump: Variable Speed - Rated pump head
You need to know the hydronic pressure that you need to overcome. With a bit of study, you could do a rough spreadsheet calculation and put a safety factor on it. Or use industry standards (see ASHRAE 90.1 App. g) for estimating.
On 07.06.2014, at 19:57, "<mailto:m.aldegheri@xxxxxxxxx>m.aldegheri@xxxxxxxxx [EnergyPlus_Support]" <<mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx>EnergyPlus_Support@xxxxxxxxxxxxxxx> wrote:
>
Maybe it's a banal question but, what does E+ mean with the "Rated pump head"?
> Is it the maximum pressure which the pump can withstand?
> So it has nothing to do with the graph head[Pa]-flow[m3/h]... right? Or better, the "pressure working condition "of the pump must be compatible with the "rated pump head".
> I don't undestand this value for the building I'm modelling. It's a 5 storey residential building and this pump is the only pump which provides the circulation of the heating fluid. The heating system is a radiant floor heating, how should I choose a pump? I don't know the losses of hydraulic load and so the needed head.
>
> Thanks
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