论文信息 - Comparative study between parallel and counter flow configurations between air and falling film desiccant in the presence of nanoparticle suspensions

Comparative study between parallel and counter flow configurations between air and falling film desiccant in the presence of nanoparticle suspensions

A comparative numerical study is employed to investigate the heat and mass transfer between air and falling film desiccant in parallel and counter flow configurations. Nanoparticles suspensions are added to the falling film desiccant to study heat and mass transfer enhancements. The numerical results show that the parallel flow channel provides better dehumidification and cooling processes of the air than counter flow configuration for a wide range of pertinent parameters. Low air Reynolds number enhances the dehumidification and cooling rates of the air and high air Reynolds number improves the regeneration rate of the liquid desiccant. An increase in the channel height results in enhancing the dehumidification and cooling processes of air and regeneration rate of liquid desiccant. The dehumidification and cooling rates of air are improved with an increase in the volume fraction of nanoparticles and dispersion factor. Copyright © 2003 John Wiley & Sons, Ltd.

[1] J. Eastman,et al. Measuring Thermal Conductivity of Fluids Containing Oxide Nanoparticles , 1999 .

[2] John R. Howell,et al. Numerical and experimental results for coupled heat and mass transfer between a desiccant film and air in cross-flow , 1994 .

[3] W. Roetzel,et al. Conceptions for heat transfer correlation of nanofluids , 2000 .

[4] William W. Yu,et al. ANOMALOUSLY INCREASED EFFECTIVE THERMAL CONDUCTIVITIES OF ETHYLENE GLYCOL-BASED NANOFLUIDS CONTAINING COPPER NANOPARTICLES , 2001 .

[5] Stephen U. S. Choi. Enhancing thermal conductivity of fluids with nano-particles , 1995 .

[6] H. Brinkman. The Viscosity of Concentrated Suspensions and Solutions , 1952 .

[7] C. Tien,et al. Effects of thermal dispersion on forced convection in fibrous media , 1988 .

[8] O. K. Crosser,et al. Thermal Conductivity of Heterogeneous Two-Component Systems , 1962 .

[9] Wasim Saman,et al. Modelling and performance analysis of a cross-flow type plate heat exchanger for dehumidification/cooling , 2001 .

[10] Y. Xuan,et al. Heat transfer enhancement of nanofluids , 2000 .

[11] Moustafa M. Elsayed,et al. A numerical solution for cooling and dehumidification of air by a falling desiccant film in parallel flow , 1998 .

[12] M. J. Wheeler. Heat and Mass Transfer , 1968, Nature.

[13] Kambiz Vafai,et al. Analysis of dispersion effects and non-thermal equilibrium, non-Darcian, variable porosity incompressible flow through porous media , 1994 .