(Solved): 9-48. Because the efficiency of the large-barrel-diameter cyclone in Problem 9-47 is low for fine pa ...

9-47. Calculate the efficiency of romoval of a 250 - pm-diameter particle having a density of $1,250\mathrm{kg}/{\mathrm{m}}^3$ for a cyclone barrel diameter of $1.0\mathrm{m}$. The gas flow rate is $2.80{\mathrm{m}}^2/\mathrm{s}$ and the gas tenetyerature is $25^{\circ }\mathrm{C}$. Answer: $v=14\%$ 9-48. Because the efficiency of the large-tarrel-diameter cyclone in Problem $9-47$ is low for fine particles, a multiclone consisting of 10 barrels has been proposed as an alternative. Each barrel is to be $0.10\mathrm{m}$ in diameter. Calculate the efficiency of the multiclone using the particle and gas data given Problem 9-47.