MARC 主機 00000nam  2200289   4500 
001    AAI8707873 
005    20081204140453.5 
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035    (UMI)AAI8707873 
040    UMI|cUMI 
100 1  CHAROENSUPAYA, DHANES 
245 10 EXPERIMENTAL AND ANALYTICAL INVESTIGATIONS OF COMPOSITE 
       DESICCANT STRUCTURES AND LOW HUMIDITY ADSORPTION 
300    327 p 
500    Source: Dissertation Abstracts International, Volume: 47-
       12, Section: B, page: 5024 
502    Thesis (Ph.D.)--Illinois Institute of Technology, 1986 
520    The characteristics of composite desiccant felts, which 
       were manufactured by a new technique developed at the 
       Illinois Institute of Technology, have been investigated. 
       The Thermogravimetric analysis system was rebuilt to 
       accurately determine the equilibrium sorption capacities 
       of the desiccant felts for a wide range of temperatures. 
       An equilibrium isotherm at 20.03(DEGREES)C was also 
       determined using the isothermal humidistat technique 
       developed at the Argonne National Laboratory. The results 
       from both systems are in good agreement. The monolayer 
       capacity, the specific surface area, the heat of 
       adsorption, and the integral heat of wetting of the 
       desiccant felts were determined from the equilibrium data.
       Polynomial equilibrium relation and heat of sorption 
       expressions were developed and used in the performance 
       predictions of the composite desiccant felt 
520    A mathematical model was developed for the transient heat 
       and mass transfer processes in a cooled and adiabatic 
       dehumidifier which considers the gas-side and solid-side 
       resistances for heat and mass transport. The moisture 
       diffusion in the desiccant is expressed by considering 
       both gas phase diffusion and surface diffusion. Solutions 
       were obtained by using an explicit finite-difference 
       scheme. The performance of a desiccant cooling system 
       prototype using the composite felt was predicted. The 
       effects of several parameters including heat and mass 
       transfer Biot numbers on the performance of the cooling 
       system were also theoretically investigated. It was found 
       that there is an optimum COP and cooling capacity. The 
       optimum values of the parameter for the COP and cooling 
       capacity are not necessarily at the same operating point. 
       These optimum values can be achieved by appropriate 
       control of the desiccant sorption time 
520    An experimental setup was constructed to investigate the 
       low humidity adsorption of WR Grace 03 and Mobil Sorbead R
       silica gels. The experiments were conducted for various 
       desiccant arrangements and test conditions 
590    School code: 0091 
590    DDC 
650  4 Engineering, Mechanical 
690    0548 
710 2  Illinois Institute of Technology 
773 0  |tDissertation Abstracts International|g47-12B 
856 40 |uhttp://pqdd.sinica.edu.tw/twdaoapp/servlet/
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