Selection of exhaust fans and calculation of duct resistance
Thread Content
I want to calculate the energy loss of CO in the pipeline, and then select an exhaust fan to be installed at the end of the pipeline. In this pipeline process, exhaust gas at a rate of 500 cubic meters per hour is generated by the preceding equipment; it flows through 5 absorption towers to remove dust and impurities and recover CO. The pipes are made of 325*8 stainless steel; the end of the pipeline is equipped with a fan, while the inlet is a tank with a diameter of 3 meters. The end of the pipeline is 10 meters higher than the inlet. The roughness value is set at 0.3. There are 21 elbows and 15 ball valves in total. The length of the pipeline is 98 meters. The total energy loss calculated is 301 J/KG, which means that 45 W of energy needs to be compensated for each second. Isn’t this too low? The loss seems too small. How should the fan be selected? How can the fan’s power be calculated? 45 W – isn’t even a hand fan sufficient to cover that amount of energy loss?
So is that 162,000 W per hour?
It should be 0.045 kilowatt-hours, right? 162 kilowatts sounds like a lot, but using that much energy in one hour means the amount of electricity used is actually laughable
What size is your pipe? Tell me, I’ll take a look for you