Heat Rejection To Coolant - Kubota WG752 E3 Applications Manual

6. HEAT REJECTION TO COOLANT

Specific at net intermittent (SAE J1349)
Model Fuel
Gasoline
WG752
LPG
NOTE
• Heat rejection to cooling water calculating formula
• Ho=Hu·Ne·be·i
Ho : Heat rejection to cooling water
Hu : Fuel lower heating value
Gasoline : 42.7 MJ/kg, 10201 kcal/kg, 18361 BTU/lb
LPG : 47.3 MJ/kg, 11300 kcal/kg, 20339 BTU/lb
NG : 49.5 MJ/kg, 11828 kcal/kg, 21285 BTU/lb
Japanese standard gas
lower heating value : 9699 kcal/m
supply pressure : 0.98 − 2.45 kPa (2.27 − 5.68 oz/inch
Ne : Brake horse power
be : Specific fuel consumption ratio
i : Dispersion ratio to cooling water
Output
kW
Brake horse power HP
PS
g/kWh
g/HPh
Fuel consumption
g/PSh
lb/HPh
MJ/h
Heat rejection to
kcal/h
cooling water
BTU/h
kW
Brake horse power HP
PS
g/kWh
g/HPh
Fuel consumption
g/PSh
lb/HPh
MJ/h
Heat rejection to
kcal/h
cooling water
BTU/h
3
(1090 BTU/ft
Engine Speed (min
2000 2400
11.3 13.8
15.1 18.5
15.3 18.8
325 315
243 235
239 231
0.535 0.517
28.85 32.90
6891 7859
27735 31631
10.7 13.1
14.3 17.6
14.5 17.9
301 296
224 221
221 218
0.495 0.487
28.02 32.51
6694 7766
26944 31255
3
)
2
)
1-8
-1
(rpm))
2800 3200 3600
15.6 16.7 17.1
21 22.4 23
21.3 22.7 23.3
323 343 347
241 256 259
238 252 255
0.531 0.564 0.571
37.03 42.32 45.91
8846 10110 10967
35604 40689 44141
14.9 16 16.4
20 21.5 22
20.3 21.8 22.3
306 322 337
228 240 251
225 237 248
0.502 0.53 0.554
37.12 42.16 47.37
8867 10072 11316
35688 40539 45543