(719m) A Simplified Analysis of Temperature Swing Adsorption in Honeycomb Rotor Dehumidifiers
AIChE Annual Meeting
2008
2008 Annual Meeting
Separations Division
Poster Session: Fundamentals and Applications of Adsorption and Ion Exchange
Thursday, November 20, 2008 - 6:00pm to 8:30pm
Honeycomb rotor dehumidifiers have been used widely because of large surface area and rapid thermal response. Mass and temperature transfer behavior for the performance evaluation is rather complicated and a system of simultaneous partial differential equations of 8 variables must be solved under a cyclic initial condition for the complete simulation.
With high efficiency dehumidifiers, however, a relative heat capacity Λ(=ρccc(1-ε)Z/ρgcgUtc) is smaller than unity and a relative adsorption capacity M(=ρcq0*(1-ε)Z/C0Utc) is higher than unity. When the cycle time tc is selected properly under the above condition, each step of adsorption/desorption can be divided into two different time zones, i.e. a transition stage appearing just after switching the step until t/tc The above simplified model is proposed together with a graphical solution method and the result is compared with the more rigorous simulation.
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