Is it feasible to use an exhaust fan as a blower?
Thread Content
There is an existing flue gas exhaust fan; can it be used as a blower? The premise is that the flow rate and pressure are appropriate.
I haven’t tried it, but I think it should work...
The exhaust fan is originally a blower, so it should work. . .
Theoretically, there’s no problem; the blower in our factory’s incinerator is simply a smaller version of an exhaust fan, and there are also high-power exhaust fans available. If the air volume and pressure are appropriate, it should work fine
Both exhaust fans and blowers are centrifugal fans; they differ only in flow rate, which allows them to be used interchangeably. It is best to use them with variable frequency drives, as this helps save energy
This probably won’t work; flow rate is related to temperature, not to mention the temperature tolerance of the fan. The air supply flow rate is at normal temperature (atmospheric temperature), while the exhaust air flow rate is at the temperature of the flue gas, which is usually above 160 degrees.
For example, for the parameters of the exhaust fan: a pressure of 3000 Pa and a flow rate of 10,000 cubic meters, the corresponding parameters for this exhaust fan would be 3000 Pa * 15,000 cubic meters (under operating conditions of 140 degrees). If the required blower parameters are 3000 Pa at standard conditions and a flow rate of 15,000 cubic feet per second, can it be used as a substitute? My question is regarding the flow rate and pressure under the operating conditions of the exhaust fan; if they are similar to those of the blower, can it then be replaced?
Bro, the blower is used to maintain pressure at the back of the fan, allowing air to flow steadily into the burner. The exhaust fan, on the other hand, ensures pressure at the front of the fan (inside the furnace), creating a negative pressure in the furnace so that smoke does not escape. Moreover, there is a significant difference in pressure at the outlets of the exhaust fan and the blower
Without considering the medium temperature, they can be used interchangeably. It’s just a gadget