Re: [EnergyPlus_Support] water flow rate in primary and secondary loop

["Jim Dirkes jim@xxxxxxxxxxxxxxxxxxxxxxxxxxx [EnergyPlus_Support]" <EnergyPlus_Support@xxxxxxxxxxxxxxx>]

Francesco,

It's common for a primary pump to operate at constant speed whenever the chiller is operating. The pump should be OFF when the chiller is OFF.

The ASHRAE 90.1-specified pump power should be split between primary and secondary pumps (though ASHRAE does not specify the ratio)

On Sat, Aug 25, 2018 at 11:21 AM, fpasserini.tn@xxxxxxxxx [EnergyPlus_Support] <EnergyPlus_Support@xxxxxxxxxxxxxxx> wrote:

 

I am modeling System 7 with primary CHW loop and secondary CHW loop, according to ASHRAE 90.1-2007..

If I see the output, it seems that the primary water pump is always working, even when the secondary pump isnâ??t. Is that fine?

See attached images relative to the primary and to the secondary water flow rate.

Best Regards

Francesco

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James V Dirkes II, CEO / President
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Posted by: Jim Dirkes <jim@xxxxxxxxxxxxxxxxxxxxxxxxxxx>

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