refrigeration system - water flow rate

denver1000 PE · Sep 2, 2015

Hello - in example 138 in NCEES 2001

I'm wondering where the 500 gpm in the solution formula Q = 500gpm x delta T comes from... any help will be appreciated!

lundy · Sep 2, 2015

It all boils down to units for that 500 number "500 = the “fluid factor” this is based on water as the heat transfer fluid. The fluid factor is obtained by using the weight of a gallon of water (8.33 lbs.) multiplied by the specific heat of the water (1.0) multiplied by 60 (minutes). This comes out to 499.8 when using water."

denver1000 PE · Sep 2, 2015

Thank you Lundy

lundy · Sep 2, 2015

denver1000 said:
Thank you Lundy

No problem!

P-E · Sep 2, 2015

Generically. Q = m dot x cp x delta T

Ramnares P.E. · Sep 2, 2015

This ^^

denver1000 PE · Sep 2, 2015

Thanks.

refrigeration system - water flow rate

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