Correction Factors For Glycol - Carrier 42 SERIES Application Data

CORRECTION FACTORS FOR GLYCOL

(Equivalent water flow method for all 42 Series Models)
This method allows you to calculate cooling and heating performance without adjusting capacities for glycol
concentration.
After completing the standard selection procedure including water flow rates, use the correction multiplier shown below
to determine new (equivalent) flow rates required for the specified glycol concentration.
EXAMPLE:
COOLING PERFORMANCE REQUIRES 3.0 gpm of 100% WATER.
What flow rate of 30% glycol by voume will be required to match the cooling performance? Referring to the
chart above, you will note that the cooling flow rate multiplier for 30% glycol is 1.14.
100% WATER (3.0 gpm) x 1.14 = 3.42 gpm of 30% GLYCOL (EQUIVALENT FLOW RATE)
What will the new pressure drop be for 3.42 gpm of 30% glycol? Referring to the chart above, you will note
that the cooling pressure drop multiplier for 30% glycol is 1.27.
(A) Obtain pressure drop for 3.42 gpm of 100% water.
(B) Multiply (A) times 1.27 to obtain pressure drop for 3.42 gpm of 30% glycol.
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