Technical Specifications of AFP Heat Exchanger
(Based on TEMA Naming Convention)
The AFP Heat Exchanger is a specialized type of heat exchanger under the TEMA standard, typically referring to a Fully Welded Plate-Shell Heat Exchanger. Its naming convention and core parameters are as follows:
1.TEMA Naming Convention Breakdown
AFP consists of three letters, each representing a key design feature:
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o A: Front Head Type (A = removable flat cover for maintenance access).
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o F: Shell Type (F = special shell design, often used for plate-shell or compact configurations).
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o P: Rear Head Type (P typically denotes an externally packed floating head, but in AFP, it often refers to a welded plate bundle fixed structure).
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o AFP is not a traditional TEMA standard model but an industry-accepted term for fully welded plate-shell exchangers.
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o In strict TEMA standards, the "F" shell type denotes a double-pass shell, but in AFP, "F" emphasizes the compact plate-shell design
示例型号：AES-500-120-6/4-2
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o 500：壳体直径（mm）
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o 120：换热面积（m²）
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o 6/4：管程/壳程设计压力（MPa）
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o 2：管程数（2程）
2. Key Technical Parameters (Plate-Shell Design)
| Parameter | Typical Value/Range | Remarks |
| Design Standard | ASME VIII Div.1 / TEMA / EN 13445 | Requires special certification |
| Heat Transfer Area | 50~5000 m² | Stacked plate design, high compactness |
| Design Pressure (Shell/Plate Side) | 0.6~8.0 Mpa (6~80 bar) | Fully welded structure, high pressure resistance |
| Design Temperature | -50°C to +400°C | High-temperature models up to 600°C (special materials) |
| Plate Material | SS316L / 254SMO / Titanium / Nickel Alloy | Corrosion-resistant, laser-welded thin plates |
| Plate Thickness | 0.4~1.2 mm | Must consider stamping strength |
| Channel Spacing | 3~10 mm | Narrow channels enhance heat transfer |
| Heat Transfer Coefficient | 3000~7000 W/(m²·K) | 3~5× higher than shell-and-tube exchangers |
| Pressure Drop (per side) | ≤50 kPa | Low flow resistance design |
| Connection Standard | ANSI / DIN / GB Flanges | DN100~DN800 |
3. Structural Features
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o Fully Welded Plate Bundle: Plates laser-welded into modules, eliminating gasket leakage risks.
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o Compact Shell: Volume is only 1/5~1/10 of traditional shell-and-tube exchangers.
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o Multi-Pass Design: Plate side configurable as single-pass or multi-pass (2/4 passes).
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o Anti-Fouling: Narrow channels + high turbulence reduce fouling deposition.
4. Typical Applications
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o 石油化工：天然气液化（LNG）、乙烯裂解气冷却
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o 制药/食品：高卫生要求工况（CIP/SIP系统）
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o 电力行业：余热回收（烟气冷凝）
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o 船舶工程：紧凑型中央冷却系统
5. Data Required for Selection
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o 1.Fluid Properties (viscosity, corrosiveness, solid content).
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o 2.Temperature/Pressure Curves (transient conditions require special simulation).
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o 3.Allowable Pressure Drop (affects plate corrugation design).
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o 4.Space Constraints (compactness is a core advantage of AFP).
6. Comparison with Traditional TEMA Exchangers
| Feature | AFP Plate-Shell Exchanger | TEMA AES Floating Head Exchanger |
| Structure | Welded plate bundle + compact shell | Tube bundle + cylindrical shell |
| Heat Transfer Efficiency | Ultra-high (narrow channel turbulence) | Medium-high (depends on baffle design) |
| Pressure Rating | ≤8.0 Mpa | ≤6.4 Mpa |
| Maintainability | Non-removable, requires chemical cleaning | Mechanically cleanable (tube bundle removable) |
| Cost | High (complex materials and welding) | Medium |
Note: AFP exchangers require custom design. Directly consult manufacturers (e.g., Alfa Laval, Vahterus, LANPEC) for specific operational needs.
Manufacturer References:
International: Alfa Laval (Compabloc), Vahterus, Packinox
China: LANPEC, Sinopec Engineering Group.
中文
