Installation Manual

Chapter 4 N38143
Page 18
Heat rejection data (cont.)
Engine model 4.4GM 4.4TGM 4.4TWGM 4.4TW2GM 6TG2AM 6TWGM
Heat rejection
Jacket water - Engine Btu/min 2440 2838 3338 TBA 5198 6541
kW 42.9 49.9 58.7 TBA 91.4 115
Aftercooler - Intercooler Btu/min - - 77.3 TBA - 1570
kW - - 13.6 TBA - 27.6
Water ow rate, thermostat fully open
Engine US gals/min 22-40 20-40
Litres/min 150 150 150 150 77-150 77-150
Intercooler US gals/min - - - - - 20
Litres/min - - 102 102 - 91
Max coolant temp
(from grid cooler)
Engine
o
F 140 140 140 140 140 140
o
C 60 60 60 60 60 60
Intercooler
o
F - - 100 100 - 100
o
C - - 38 38 - 38
As a general rule the pressure drop across the grid cooler should be between 14 - 28kPa (2 to 4 psi) this can
be acheived by keeping the water velocity below 0.46m/s (5ft/s).
The above table shows data that will satisfy all world wide operational conditions. However, if the applica-
tion is known to be only operating in areas where the sea water temperature is unlikely to exceed 25
o
C, then
when sizing the grid coolers the maximum coolant temperature returning to the intercooler of 43
o
C could be
used and 75
o
C coolant temperatures returning to the engine circuit.