Parker GVM Series - Flow Rating According to Glycol Concentration

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18-06-08 PVD3668_GB_GVM_June_2018
3.6.3. Flow rating according to glycol concentration
Use of the graph above - Example
If the motor needs 10 l/min with 0% glycol,
If application needs 20% glycol, the water flow must be 10,6 l/min,
If application needs 40% glycol, the water flow must be 11,8 l/min.
Main formulas
p
C
ndissipatioPower
rateFlow
*
60*_
_



With: Flow rate [l/min]
Power_dissipation [W]
 ° Gradient inlet-outlet [°C]
Cp thermal specific capacity of the water as coolant [J/kg°K]
(Cp depends on the % glycol concentration please see below)
Thermal specific capacity Cp according to % glycol concentration and temperature
We have considered an average temperature of the coolant of 30°C.
Glycol concentration
[%]
Average temperature of the water as
coolant [°C]
Thermal specific capacity of the water
Cp [J/kg°K]
0
30
4100
30
30
3700
40
30
3500
50
30
3300