1. What are the critical parameters for real-time tube monitoring?
Tube metal temperatures at multiple locations. Steam/water flow rates and pressures. Heat flux measurements across tube banks. Vibration frequencies and amplitudes. Water chemistry parameters (pH, oxygen, conductivity).
2. How does distributed temperature sensing (DTS) work?
Fiber optic cables run along tube lengths. Measures temperature via Raman scattering. Provides continuous profile every 1-2 meters. Detects localized hot spots or blockages. Data integrates with control systems.
3. What are the advantages of wireless monitoring systems?
Eliminates costly wiring installations. Enables monitoring in inaccessible areas. Rapid deployment for temporary assessments. Lower maintenance than wired systems. Scalable for plant-wide coverage.
4. How can vibration analysis predict tube issues?
Changes in natural frequencies indicate loosening. Increased amplitudes suggest flow problems. Spectral analysis identifies specific failure modes. Baseline measurements detect deviations. Particularly useful for U-bend sections.
5. What are the challenges in implementing monitoring systems?
Sensor survivability in harsh environments. Data overload from continuous feeds. Calibration and maintenance requirements. Integration with existing control systems. Justifying costs for older units.
