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The heat exchanger of an adsorption system comprises of an adsorber bed filled with porous granules/particles. Refrigerant vapor enters the adsorption chamber at evaporator pressure and gets adsorbed ...by the bed, releasing heat of adsorption. In the present study a 2-dimensional transient heat and mass transfer modeling is carried out to simulate the adsorption dynamics of ethanol on loosely packed activated carbon (Maxsorb III) bed. The model is first verified with experimental results available in literature and then utilized to observe the effects of activation energy and domain size on adsorption dynamics. The results indicate that for lower values of activation energy, the adsorption dynamics can significantly deviate from that estimated by lumped Linear Driving Force (LDF) equation. Furthermore, domain aspect ratio also plays an important role in adsorption dynamics, which can be attributed to their pressure drop characteristics.show more
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