MIT2_500s09_hw03 - MIT OpenCourseWare

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: MIT OpenCourseWare 2.500 Desalination and Water Purification Spring 2009 For information about citing these materials or our Terms of Use, visit: . MASSACHUSETTS INSTITUTE OF TECHNOLOGY DEPARTMENT OF MECHANICAL ENGINEERING 2.500 Desalination and Water Purification Homework Set #3 Due 9 April 2009 Problem 1: Electrodialysis A total of 325 m 3 /day of an aqueous solution of 3,000 ppm of NaCl is to be desalinated to 400 ppm by electrodialysis, with a 40% conversion of this solution to potable water. The system used has four stages in series; all liquid travels from one stage to the next. Each stage has three parallel stacks with 150 cell pairs in each stack. The fractional desalination (or c out /c in ) will be the same for each stage. The expected current eciency is = 90%. The applied voltage for the first stage is 220 Vdc. Each cell pair has an area of 1,160 cm 2 . Calculate the current density i in mA/cm 2 , the current I in A, and the power...
View Full Document

This note was uploaded on 02/27/2012 for the course MECHANICAL 2.500 taught by Professor Miriambalaban during the Spring '09 term at MIT.

Page1 / 3

MIT2_500s09_hw03 - MIT OpenCourseWare

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online