Question

Remember that pressure drop in piping vary as the diameter is changed, assuming the mass flow rate is the same. you found that pressure drop is inversely proportional to diameter to the fifth power. You also know that velocity in the duct/pipe is inversely proportional to area or diameter squared, again for the same mass flow rate. Your water flow analysis is based on achieving a water flow velocity similar to the air velocity (24 ft/s), however the result for the 800 foot long 04 inch diameter pipe was an unreasonably large pressure drop (greater than 1200 psi) and large power consumption which can be reduced with a pipe diameter increase. Using ratios only,find new parameters (velocity, pressure, power, temperature rise) if the pipe diameter is increased from 0.4 inches to 0.6 inches. Comment and discuss.

Answer 1