ANALYSIS OF A RING-SHAPED SENSOR FOR USE IN PACKED-BED HEAT-TRANSFER STUDIES

A new type of ring-shaped temperature sensor for packed-bed heat trans fer studies is presented. This ring-shaped sensor is easy-to-build and allows one to filter the experimental angular temperature fluctuation s. This device is more effective for beds of small tube-to-particle di ameter ratio. The proposed device is able to eliminate the effect of t he angular position on temperature measurements in packed beds. This s ensor property is confirmed both experimentally and theoretically. For demonstration purpose, packed beds of six different materials were st udied. Effective thermal radial parameters obtained using the ring-sha ped sensors have shown trends similar to published packed-bed heat tra nsfer data.