🔄 Rotary Regenerator Sizer (Ljungström APH)
Size boiler rotary air preheaters (Ljungström APH): thermal effectiveness, matrix heat capacity ratio Cr*, preheated air temp, and sulfuric acid dew point limit.
⚡ Fortran 90 Engine
Double Precision (IEEE 754)
✓ ISO / ASME Validated
📊 Solver Telemetry
● ACTIVE
👁️ Consultations
15
⚡ Calculs faits
13
💾 Téléchargements
364
📦 Code Fortran
4.1 KB
📅 Mise en service
Jun 2026
⏱️ Latence
< 1 ms
🔄 Rotating Ljungström Wheel & Counterflow Matrix Sectors
Real-time visual simulation: Flue gas heating left sector, cold combustion air absorbing heat on right sector📝 Configuration & Presets
Ljungström Regenerator Formulation:
• Matrix Capacity: Cr = Mmat · cmat · (N/60) [W/K]
• Capacity Ratio: Cr* = Cr / Cmin
• Kays & London Effectiveness: εreg = εcf · [ 1 − 1 / (9 · (Cr*)1.93) ]
• Heat Recovery: Q̇ = Cair · (Ta,out − Ta,in) [MWth].
• Matrix Capacity: Cr = Mmat · cmat · (N/60) [W/K]
• Capacity Ratio: Cr* = Cr / Cmin
• Kays & London Effectiveness: εreg = εcf · [ 1 − 1 / (9 · (Cr*)1.93) ]
• Heat Recovery: Q̇ = Cair · (Ta,out − Ta,in) [MWth].
📊 Performance Results
Configure inputs and click Compute to view results.
📘 Calculation Methodology & Rotary Regenerator Standards
Ljungström Rotary Wheel Mechanism
A slowly rotating corrugated steel matrix transfers thermal energy periodically between the hot flue gas exhaust and cold incoming combustion air, saving millions of dollars in annual boiler fuel.
Sulfuric Acid Dew Point Constraint
In sulfur-bearing fuels (coal, heavy fuel oil), sulfur trioxide ($SO_3$) combines with moisture to form sulfuric acid ($H_2SO_4$) mist if flue gas drops below $130 - 145^\circ\text{C}$.
Key Engineering Assumptions
- Modified Kays & London $\epsilon-NTU-C_r^*$ rotary heat exchanger formulation.
- Soot blowing and radial/circumferential air-to-gas leakage seal allowances.
- Widely used on thermal power plants, cement kilns, and refinery process heaters.