Article ID: 25-05AD
The objective of this study is to clarify the temperature and humidity distribution in the desiccant rotor. Thus we focused on the small sensors for “Internet of Things”. In the previous study, we created a measuring system to install the small sensor unit inside the desiccant rotor, continuous measurement inside the rotating material become possible. First part of this report, we confirm the correcting method for sensor response delay when temperature and humidity input were changed was examined. And so, the results of the test, the response delay showed the same characteristics regardless of the differences in air temperature and humidity. The correction equations for the temperature and humidity were obtained. Second part of this report, adsorption/desorption measuring test to visualize inside the rotors was conducted. Two kinds of desiccant rotors with small sensors were created to compare the performance. The small sensors were buried at several points from surface to another side of rotor. Fig. A-1 shows temperature and humidity distribution in the circumferential direction of desiccant rotor. At a regeneration temperature of 55°C, the dehumidification amount decreases with a peak at a rotation angle of 0.3, while the regeneration amount decreases with a peak at a rotation angle of 0.7. Fig. A-2 shows the variation in dehumidification amount along the rotor thickness direction. The dehumidification amount was calculated by averaging the sensor measurements inside the rotor. For Rotor A, 75% of dehumidification was completed at thickness of 100 mm, whereas Rotor B achieved only 56 % of dehumidification. A few dehumidification was shown between 100 – 200 mm thickness of rotor A. Therefore, reducing the rotor thickness should be considered.
