Flow rate issues with Roots blowers
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I have a Roots blower in use; its normal flow rate is around 200 cubic meters per hour. It’s a variable-frequency blower, and the frequency is adjusted by changing the opening degree of the control valve. The variable-frequency system has not been used yet. Today, the blower’s casing was cooled with water, and after a while the flow rate increased to over 300 cubic meters per hour. I’m not sure why this happens – why does the flow rate increase when the blower is cooled? Please share your thoughts; extra points for that
Is this flow rate in standard cubic feet or in terms of operating conditions? If it’s in standard cubic feet, then cooling the rotor blower’s casing will lower its temperature, which in turn reduces the temperature of the gas in contact with it, making it easier to compress. Once the casing temperature returns to normal, the flow rate will also gradually return to its normal level
Hello! Explanation of 300 cubic meter flow rate: Since the water-cooled Roots blower has a casing, it causes the temperature of the gas inside the blower to drop and its density to increase. Density is directly proportional to pressure, which in turn leads to an increase in the pressure at the blower’s outlet. The ability to overcome pipe resistance increases. Shifting the fan’s operating curve toward a higher flow rate means increasing it from 200 cubic meters to 300 cubic meters! For further inquiries regarding fans, please contact Mr. Gong at 13472709938!
The frequency conversion has not been used, which indicates that the speed remains unchanged; the volumetric flow rate at the inlet of the Roots blower stays constant. After cooling by water, the temperature of the gas drops and its density increases, resulting in a higher standard flow rate.