2 Some Types of Heat Exchangers Sensible Heat Cooling and HeatingChange of Phase Boilers and CondensersPartial Condensing or Partial VaporizationWiped Film Units for Viscous Fluids
3 Basic Model 𝑄=𝑈𝐴Δ𝑇 Simple Heater Loop 𝑄=𝑆𝜆=𝐹 𝑐 𝑃 ( 𝑇 2 − 𝑇 1 ) Actual loop on P&IDRiggs & Karim, Chemical and Bio-Process Control, 2006, p. 12
4 Control Loop Options Feedback has some lag time Feedforward based on steady state processPerry, Chemical Engineers Handbook, 7th Ed., p. 8-17
5 Alternate Methods Bypass Control Options Combined Feedback & FeedForwardMarlin, Process Control Designing Processes and Control Systems for Dynamic Performance, 2000, p.784Riggs & Karim, Chemical and Bio-Process Control, 2006 p. 401
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