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

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Presentation transcript:

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

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

SINGLE HEAT EXCHANGERS SHELL & TUBE EXCHANGERS SHELL & TUBE EXCHANGERS USED FOR SINGLE PHASE OR TWO PHASE FLOWS USED FOR SINGLE PHASE OR TWO PHASE FLOWS From: From:

EXCHANGER FLOW PATTERNS COCURRENT OR COUNTERCURRENT COCURRENT OR COUNTERCURRENT

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

CORRECTION FACTORS FOR MULTIPASS EXCHANGERS

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

BASIC CONTROL SCHEMES FOR SINGLE EXCHANGERS -1 FLUID TEMPERING EXCHANGER WITH FEEDBACK CONTROL

BASIC CONTROL SCHEMES FOR SINGLE EXCHANGERS - 2 FLUID TEMPERING EXCHANGER WITH FEEDBACK AND FEEDFORWARD CONTROL

GENERAL BLOCK FLOW DIAGRAM FOR CONTROL LOOP

SPECIFIC BLOCK FLOW DIAGRAM

HEAT RECOVERY SYSTEMS HEAT RECOVERY FOR A SIMPLE SYSTEM HEAT RECOVERY FOR A SIMPLE SYSTEM

HEAT RECOVERY WITH FEEDBACK & FEEDFORWARD OPTIONS

REACTOR TEMPERATURE CONTROL WITH JACKET - 1 FEEDBACK CONTROL BASED ON PRODUCT TEMPERATURE FEEDBACK CONTROL BASED ON PRODUCT TEMPERATURE

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

REACTOR TEMPERATURE CONTROL - EXTERNAL EXCHANGER

DISTILLATION CONTROL - CONDENSER

DISTILLATION CONTROL - REBOILER

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

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