Dynamic Performance of a Dehumidification System Using the Absorption-Type Rotary Honeycomb Dehumidifier.

Abstract

A theoretical and experimental investigation is carried out on the dynamic behavior of a dehumidification system used to dry out the wet floor in a beverage factory. The dehumidification system consists of an absorption-type rotary dehumidifier with lithium chloride salt coated on the honeycomb monolith. Experimental runs were carried out in the factory. By coupling a previous dynamic model of the dehumidifier with an evaporation model of the wet concrete floor, good agreement has been obtained between the simulated and experimental results, thus confirming the applicability of the integrated model. To obtain better performance of the integrated dehumidification system, the model is next used to investigate the effects of various system inputs and parameters on its dynamic preformance. The results show that the paired velocities of dehumidified and regeneration outlet airs, and the pre-heating temperature of the regeneration air have more prominent effect on dehumidification efficiency than the other factors. It is possible to both reduce the room relative humidity below 50% and dry out the water on the floor within 12 hours of dehumidification. The most suitable dehumidification conditions among those investigated are: velocity of room air 0.06 m/s, inlet temperature of regenerated hot air 343 K, velocity of regenerated hot air 0.5 m/s, air velocity in dehumidifying section 0.68 m/s and rotational speed of honeycomb 10 rph.