A sensible heat wheel is a rotating heat recovery device that transfers temperature between exhaust and supply air streams without transferring moisture. The wheel contains a honeycomb matrix material, typically aluminum or synthetic fiber, that alternately contacts warm exhaust air and cool incoming air as it rotates at 10-15 RPM. This passive recovery method captures 50-80% of available sensible heat energy.
Technical Details
Sensible heat wheels operate through direct contact between air streams and the rotating matrix. The wheel diameter typically ranges from 200 to 1200 mm, with rotation speeds between 10-15 RPM. Pressure drop across the device is generally 25-50 Pa. The matrix material has a heat capacity of 0.8-1.2 kJ/kg°C, enabling rapid temperature transfer without chemical reaction or moisture carryover.
Applications and Practical Significance
These wheels are ideal for facilities requiring humidity control separation, including cleanrooms, laboratories, and manufacturing environments. Installation in commercial HVAC systems reduces heating and cooling loads by 40-60% depending on climate. They are particularly effective in dry climates where humidity separation is critical and in applications where cross-contamination must be eliminated.