作者 CHAROENSUPAYA, DHANES
書名 EXPERIMENTAL AND ANALYTICAL INVESTIGATIONS OF COMPOSITE DESICCANT STRUCTURES AND LOW HUMIDITY ADSORPTION
說明 327 p
附註 Source: Dissertation Abstracts International, Volume: 47-12, Section: B, page: 5024
Thesis (Ph.D.)--Illinois Institute of Technology, 1986
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
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
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
School code: 0091
DDC
Host Item Dissertation Abstracts International 47-12B
主題 Engineering, Mechanical
0548
Alt Author Illinois Institute of Technology