Kansai Electric Heat Corp.
Honeycomb Block Heater vs Sheathed Heater Comparison
Overview
The TSK High-Efficiency Honeycomb Block Heater integrates a heating element into a low-pressure-loss honeycomb ceramic structure. This design allows air to pass evenly around both the inner and outer surfaces of the coiled heating wire, ensuring uniform and highly efficient heating.
In contrast, a Sheathed Heater consists of a heating wire (heating element) encased in a metal sheath tube filled with an insulating material, typically magnesium oxide (magnesia).
|
High-Efficiency Honeycomb Block Heater |
Sheathed Heater |
|
|---|---|---|
| Thermal Efficiency | Air flows uniformly through and around the coiled heating wire, allowing nearly 100% of the generated heat to be transferred to the airflow. (P.A.T.) | Uses secondary heating, resulting in lower thermal efficiency and slower temperature rise. At high temperatures, the sheath pipe may deform, causing uneven heater spacing and reduced heat exchange performance. |
| Service Life | The low watt density minimizes stress on the heating element, providing an exceptionally long service life with a significantly reduced risk of wire breakage. | High watt density increases the risk of wire breakage. Not suitable for high-temperature applications. Elevated internal temperatures shorten the heater’s lifespan. |
| Safety | Designed with ample insulation and spacing distances to ensure long-term operational safety. | Insulation quality of the magnesia may degrade over time, leading to short circuits between the heating wire and the metal sheath. Corona discharge or electrical arcing may occur within the insulation material. Insulation performance decreases as the product ages. |
| Ease of Operation | No cooling operation is required. Temperature control is simple and allows for high-precision regulation. | Requires post-operation cooling. Skipping this step can cause failures such as wire breakage. |
Notes for Industrial Use
- TSK's honeycomb heaters are especially suitable for applications requiring stable high-temperature airflow, long service life, and low maintenance.
- Sheathed heaters may still be suitable for lower-temperature or non-continuous heating processes, but require more careful handling and maintenance.