局所物質移動係数を用いた簡易モデルによるデシカントロータの性能予測

抄録

A simple mathematical model, in which the linear driving force (LDF) was adopted and local values of mass and heat transfer coefficients were considered, was applied to express or predict a dehumidification behavior of an adsorbent desiccant rotor. Penetration theory was also employed to correlate the mass transfer coefficient and the rotor rotation speed. Applicability of this simple model was discussed in terms of the dehumidification performance and the angular distribution of outlet air conditions (humidity and temperature). At first, this simple model gave a good agreement with the experimental results especially in a low regeneration temperature region, although the applicability of the simple model was limited to the region of the rotation speed at which the penetration theory was held. However, the differences of the angular distribution of the process / regeneration outlet air conditions between calculation and experiment tended to be large especially at the angular region of the rotor where the mass and heat transfer occurred drastically. This implied that changes of the process and regeneration air velocities along the air flow direction, which affected the mass and heat transfer coefficients, should be considered in the mathematical model at least.