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CONTROL FOR HEAT EXCHANGE

CONTROL FOR HEAT EXCHANGE. M. B. JENNINGS CHE 185 FEB 2006. OUTLINE. EXCHANGER DESIGN CONCEPTS GENERAL CONTROL CONFIGURATION SPECIFIC TYPES OF PROCESSES HEAT RECOVERY REACTORS DISTILLATION COLUMNS. SINGLE HEAT EXCHANGERS. SHELL & TUBE EXCHANGERS

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CONTROL FOR HEAT EXCHANGE

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  1. CONTROL FOR HEAT EXCHANGE M. B. JENNINGS CHE 185 FEB 2006

  2. OUTLINE • EXCHANGER DESIGN CONCEPTS • GENERAL CONTROL CONFIGURATION • SPECIFIC TYPES OF PROCESSES • HEAT RECOVERY • REACTORS • DISTILLATION COLUMNS

  3. SINGLE HEAT EXCHANGERS • SHELL & TUBE EXCHANGERS • USED FOR SINGLE PHASE OR TWO PHASE FLOWS • From: http://www.me.wustl.edu/ME/labs/thermal/me372b5.htm

  4. EXCHANGER FLOW PATTERNS • COCURRENT OR COUNTERCURRENT

  5. MULTIPASS EXHANGERS • 1 SHELL- 2 TUBE PASS EXCHANGER • COMBINED COUNTERCURRENT AND COCURRENT FLOW

  6. CORRECTION FACTORS FOR MULTIPASS EXCHANGERS

  7. HEAT EXCHANGE LIMITS • FOR PURE COUNTERCURRENT FLOWS • TEMPERATURE CROSSES ARE NOT POSSIBLE WITH MULTIPASS EXCHANGERS

  8. BASIC CONTROL SCHEMESFOR SINGLE EXCHANGERS -1 FLUID TEMPERING EXCHANGER WITH FEEDBACK CONTROL

  9. BASIC CONTROL SCHEMESFOR SINGLE EXCHANGERS - 2 FLUID TEMPERING EXCHANGER WITH FEEDBACK AND FEEDFORWARD CONTROL

  10. GENERAL BLOCK FLOW DIAGRAM FOR CONTROL LOOP

  11. SPECIFIC BLOCK FLOW DIAGRAM

  12. HEAT RECOVERY SYSTEMS • HEAT RECOVERY FOR A SIMPLE SYSTEM

  13. HEAT RECOVERY WITH FEEDBACK & FEEDFORWARD OPTIONS

  14. REACTOR TEMPERATURE CONTROL WITH JACKET - 1 • FEEDBACK CONTROL BASED ON PRODUCT TEMPERATURE

  15. REACTOR TEMPERATURE CONTROL WITH JACKET - 2 • FEEDFORWARD CONTROL BASED ON JACKET COOLANT INLET TEMPERATURE

  16. REACTOR TEMPERATURE CONTROL - EXTERNAL EXCHANGER

  17. DISTILLATION CONTROL - CONDENSER

  18. DISTILLATION CONTROL - REBOILER

  19. CONCLUSIONS • A FEW TYPES OF CONTROL CONFIGURATIONS CAN BE APPLIED TO A WIDE RANGE OF HEAT EXCHANGE PROCESSES • SPECIFIC TYPES OF UNIT OPERATIONS MAY BE ABLE TO USE MORE COMPLEX HEAT EXCHANGE CONTROL

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