4460 Lecture 10 2011

4460 Lecture 10 2011 - HeatandPowerIntegration...

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  Heat and Power Integration CHEN 4460 – Process Synthesis,  Simulation and Optimization Dr. Mario Richard Eden Department of Chemical Engineering Auburn University Lecture No. 10 – Heat and Power Integration: Network Design November 15, 2011 Contains Material Developed by Dr. Daniel R. Lewin, Technion, Israel
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Lecture 9 – Objectives Compute the pinch temperatures Compute the  Maximum Energy Recovery  (MER)  targets using graphical and/or algebraic methods Design a simple  Heat Exchanger Network  (HEN)  to meet the MER targets Given data on the hot and cold streams of a  process, you should be able to: Last time! Last time!
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Reviewing Simple Example Stream T S ( o C) T T ( o C) H (kW) CP (kW/ o C) H1 180 80 100 1.0 H2 130 40 180 2.0 C1 60 100 160 4.0 C2 30 120 162 1.8 Design  a  network  of  steam  heaters,  water  coolers  and  exchangers  for  the  process streams. Where possible, use  exchangers in preference to utilities. Utilities: Steam  @  150  o C,  CW  @  25 o C 30 ° 120 ° 180 ° 80 ° 130 ° 40 ° 60 ° 100 ° ΔH=162 ΔH=160 ΔH=100 ΔH=180
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Simple Example - Targets 30 ° 120 ° 180 ° 80 ° 40 ° 60 ° ΔH=162 ΔH=60 ΔH=18 130 ° ΔH=100 100 ° Units : 4 Steam : 60 kW Cooling water : 18 kW Are these numbers  optimal??
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H=150 H 180 130 C P = 3 . 0 80 40 H=50 H=80 1 2 T 30 ° 120 ° 180 ° 80 ° 130 ° 40 ° 60 ° 100 ° ΔH=162 ΔH=160 ΔH=100 ΔH=180 T H 180 130 80 40 H=50 H=80 Not to  scale!! Not to  scale!! Reviewing Simple Example
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H=232 T H 120 100 C P = 5 . 8 60 30 H=36 H=54 1 30 ° 120 ° 180 ° 80 ° 130 ° 40 ° 60 ° 100 ° ΔH=162 ΔH=160 ΔH=100 ΔH=180 H=232 T H 120 100 4 0 60 30 H=36 H=54
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4460 Lecture 10 2011 - HeatandPowerIntegration...

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