Question

You've designed a spray paint booth opening 36 inches square (3’x3’), with a face velocity of 125 fpm. You decide to reduce the volume of air exhausted each minute by 50 percent (i.e., 1/2) in order to save energy.  Safety requires that you must retain a minimum face velocity of 100 lfpm.  What is the largest total area of an opening your revised hood will allow (express in square feet)? You must show your work AND the correct answer for credit!

Answer 1

Please refer below image for the solution of given problem data.

Hope the working is explanatory and will be helpful to you.

Don't forget to rate the answer.

*** Please do rate my answer and let me know whether it is helpful to you or not. ***

data page-1. * Given Details in problems size of opening 3x3 Velocity = 125 fom = Volume of Air exhausted per minute, V = size of opening & Velocity 3x3 x 125 V = 1125 cubic foot per minute * In order to save energy, reducing Volume of air exhausted by 50 percent each winter Let the new Volume ₂ be son of V in V = 562.5 cfm = Also minimum Face velocity required is leo fom Let as New size of opening We Калою V= ax Velo uity required minimum vec V. mimimun velocity required -562,5 qatoo a: 5.625 sq.ft a = 2.37' X 2.37 - Answer