Relationship between Plate Thickness and Heat Storage Capacity of Combined Regenerator
Briefly introduces the relationship between plate thickness and heat storage capacity of combined regenerator.
Relationship between Plate Thickness and Heat Storage Capacity of Combined Regenerator
Plate thickness is a key parameter affecting heat storage capacity, thermal response speed, and pressure drop. Choosing the right thickness requires finding a balance between heat storage capacity and efficiency.
The Impact of Thickness on Performance
Thickness | Heat Storage Capacity | Thermal Response Speed | Pressure Drop | Strength | Thermal Shock Resistance |
Thin (≤0.3mm) | Low | Fast | Low | Low | Good |
Medium (0.3-0.6mm) | Moderate | Good | Moderate | Moderate | Good |
Thick (≥0.6mm) | High | Slow | High | High | Poor |
Key Trade-offs
Heat storage capacity is positively correlated with thickness, but increasing thickness leads to a decrease in the number of plates and a reduction in specific surface area, ultimately decreasing the actual usable heat storage.
Thermal response speed is inversely proportional to thickness; thin plates heat up and cool down quickly, resulting in high heat utilization; thick plates have high thermal inertia, trapping heat internally and failing to release it promptly.
Excessively thin (<0.3mm) plates lack strength and are easily damaged; excessively thick (>0.6mm) plates concentrate thermal stress, reducing thermal shock resistance.
Recommended Thickness
Cordierite: 0.3-0.5mm is recommended, balancing heat storage, response, and thermal shock resistance; Corundum-Mullite: 0.4-0.6mm (higher strength); Silicon carbide: 0.3-0.5mm (good thermal conductivity).
Selection Recommendations
Different Operating Conditions | Recommended Thickness |
RTO Quick Switching (<60s) | 0.3-0.4mm |
RTO Regular Switching (60-120s) | 0.4-0.5mm |
Regenerative Thermal Oven (Long Cycle) | 0.5-0.6mm |
Containing Dust/Adhesives | 0.4-0.6mm |
Frequent Start-Stops | ≤0.4mm |
Summary
The relationship between plate thickness and heat storage capacity can be summarized as follows: there is an optimal range (0.3-0.6mm); too thin and it is prone to breakage, too thick and efficiency decreases. Selection should be based on a comprehensive consideration of the commutation cycle, operating conditions, and material properties. The thickness should be designed in conjunction with the commutation cycle to match the thermal response speed and switching frequency in order to achieve optimal efficiency.