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ASHRAE 90.1 Navigator - Chilled water loops
Posted: Tue Jun 19, 2012 1:34 pm
by luanaepb
Hello,
I just want to confirm one information related to the chiller water pumps in the chilled water loops.
The Specific pump power that I should enter there is the power consumed by the motor that feeds the pump, divided by the water flow, is this correct?
Regards,
Luana
Re: ASHRAE 90.1 Navigator - Chilled water loops
Posted: Wed Jun 20, 2012 7:47 am
by johannesG
yes, this should be correct. however I'm not completely convinced how the water side is modeled in IES - I regularly estimate higher pump energy consumption than the modeling results.
Re: ASHRAE 90.1 Navigator - Chilled water loops
Posted: Thu Nov 22, 2012 9:57 am
by geshen516
johannesG wrote:yes, this should be correct. however I'm not completely convinced how the water side is modeled in IES - I regularly estimate higher pump energy consumption than the modeling results.
agree
most researcher would think just follow a cubic law will be ok.
In the real case, pump will never follow cubic law and will only incooperate with fluid network. Pity currently no software can simulate fluid hydro and thermal together with plant and room load calc.
However, by manually change the pump curve, we can get a more reasonable prediction.