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| PFR-model× | Pinch-analyse× | |
|---|---|---|
| Fagområde | Anvendt fysik | Anvendt fysik |
| Familie | Process / pipeline | Process / pipeline |
| Oprindelsesår≠ | 1962 | 1978 |
| Ophavsperson≠ | Octave Levenspiel | Bodo Linnhoff, John Flower |
| Type≠ | Mathematical model for plug-flow reactor | Thermal design and optimization method |
| Oprindelig kilde≠ | Levenspiel, O. (1999). Chemical Reaction Engineering (3rd ed.). John Wiley & Sons. ISBN: 978-0-471-25424-9 | Linnhoff, B., & Flower, J. R. (1978). Synthesis of heat exchanger networks: I. Systematic generation of energy optimal networks. AIChE Journal, 24(4), 633-642. DOI ↗ |
| Aliasser | ideal tubular reactor, plug-flow model, PFR | heat integration, pinch point method, process integration |
| Relaterede≠ | 3 | 4 |
| Resumé≠ | The PFR (Plug Flow Reactor) model describes the behavior of a tubular reactor in which fluid elements move through as distinct plugs with no axial mixing. Fluid at the inlet is freshly unreacted; as it travels downstream, reactions progress. This idealized model, formalized by Octave Levenspiel alongside CSTR theory, is the opposite extreme: while CSTRs are fully mixed, PFRs have no axial mixing. In practice, PFRs achieve higher conversion than CSTRs for the same residence time and are widely used in the chemical and petroleum industries. | Pinch analysis is a systematic method for identifying the minimum energy requirements and optimal heat recovery opportunities in chemical processes. Developed by Bodo Linnhoff and John Flower in 1978, it graphically identifies the 'pinch point'—the most constrained part of the process where heating and cooling demands nearly balance. By targeting these bottlenecks, engineers can design energy-efficient heat exchanger networks and reduce operating costs dramatically. |
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