Division 3.1 Fan
United Kingdom
For the fan power the standard values shown in Table 1 shall be used depending on mission profile and technology:
Table 1
Mechanical power demand of the fan
| Fan drive cluster | Fan control | Fan power consumption [W] | ||||
|---|---|---|---|---|---|---|
| Long haul | Regional delivery | Urban delivery | Municipal utility | Construction | ||
| Crankshaft mounted | Electronically controlled visco clutch | 618 | 671 | 516 | 566 | 1 037 |
| Bimetallic controlled visco clutch | 818 | 871 | 676 | 766 | 1 277 | |
| Discrete step clutch | 668 | 721 | 616 | 616 | 1 157 | |
| On/off cluch | 718 | 771 | 666 | 666 | 1 237 | |
| Belt driven or driven via transmission | Electronic controlled visco clutch | 989 | 1 044 | 833 | 933 | 1 478 |
| Bimetallic controlled visco clutch | 1 189 | 1 244 | 993 | 1 133 | 1 718 | |
| Discrete step clutch | 1 039 | 1 094 | 983 | 983 | 1 598 | |
| On/off cluch | 1 089 | 1 144 | 1 033 | 1 033 | 1 678 | |
| Hydraulically driven | Variable displacement pump | 938 | 1 155 | 832 | 917 | 1 872 |
| Constant displacement pump | 1 200 | 1 400 | 1 000 | 1 100 | 2 300 | |
| Electrically driven | Electronically | 700 | 800 | 600 | 600 | 1 400 |
If a new technology within a fan drive cluster (e.g. crankshaft mounted) cannot be found in the list the highest power values within that cluster shall be taken. If a new technology cannot be found in any cluster the values of the worst technology at all shall be taken (hydraulic driven constant displacement pump)