| Webster's Online Dictionary |
| Expressions | Domain | Definition | |
| Fan efficiency | Mining | The ratio obtained by dividing useful power output by power input. This is expressed as a percentage. Fan efficiency is understood to mean that air power is calculated from volume flowing and total pressure, on the assumption that the air does not change in volume. The velocity head, present in the air leaving the evase, is considered as a loss. The power input is that supplied to the fan shaft and thus includes the loss in the fan bearings but excludes all losses in the drive. (references) | |
| Overall fan efficiency | Mining | The ratio of the horsepower in the air to the horsepower absorbed by the driving motor of the fan. (references) | |
Source: compiled by the editor from various references; see credits. | Top | ||
