TEAM X Steady State Data Analysis Distillation Column By: Dr. Jim Henry 7 Oct 2003

Objectives Energy Equation Analysis Steady-state analysis

Distillation Column

Heat IN

Distillation Column Heat IN Heat Loss, reboiler

Distillation Column Heat IN Heat Loss, reboiler Vacuum insulated, NO Heat loss

Distillation Column Heat IN Heat Loss, reboiler Heat Loss, feed area Vacuum insulated, NO Heat loss

Distillation Column Heat IN Heat Loss, reboiler Heat Loss, feed area Vacuum insulated, NO Heat loss Vacuum insulated, NO Heat loss

Distillation Column Heat IN Heat Loss, reboiler Heat Loss, feed area Heat Loss, reflux area Vacuum insulated, NO Heat loss Vacuum insulated, NO Heat loss

Distillation Column Heat IN Heat Loss, reboiler Heat Loss, feed area Heat Loss, reflux area Heat out, condenser Vacuum insulated, NO Heat loss Vacuum insulated, NO Heat loss

Some Data

Power readings taken to be correct

Energy Equation Data Q in is measured Now we can determine Q loss

Some Data Reboiler, at 75 o C has heat loss Trays 12 & higher, insulated and cool, have no heat loss. So Q in = Q loss 200 W = U A  T

Heat Loss A = 2*  *r*l + 2*  *r 2 Surface Area (A) = 0.44 m 2 found by measuring Reboiler Measure T boiler and T room (23 o C) Determine U… the heat transfer coefficient

Heat Loss A = 2*  *r*l + 2*  *r 2 Surface Area (A) = 0.44 m 2 found by measuring Reboiler Measure T boiler and T room (23 o C) Determine U… the heat transfer coefficient 200 W = U* 0.44 *(75-23)

Some Calcs So Q in = Q loss 200 W = U* 0.44 *52 = U *22.9 U = 400/22.9 = 17 W/m 2 o C

Some Data

Reboiler, at 75 o C has heat loss Trays 12 & higher, insulated and cool, have no heat loss. So same as before

Some Data Zoom In

Some Data

Reboiler, at 85 o C has heat loss Feed area, at 68 o C has heat loss Trays higher, insulated, have no heat loss. So Q in = Q loss 400 W = U B A B  T B + U F A F  T F

Some Calcs So Q in = Q loss 400 W = U *0.44 *62 + U *.1 *45 = U 31.7 U = 400/31.7 = 13 W/m 2 o C

Conclusions U in the range W/m 2 o C

Conclusions U in the range W/m 2 o C Power readings taken to be correct