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Analysis of heat and mass transfer between air and falling film desiccant for different flow configurations in the presense of ultrafine particles

Ali, Ahmad A
http://rave.ohiolink.edu/etdc/view?acc_num=osu1060028115

Abstract Details

2003, Doctor of Philosophy, Ohio State University, Mechanical Engineering.
This work focuses on the enhancement of heat and mass transfer between air and falling desiccant film for different flow channel configurations. Cu-Ultrafine particles are added to the desiccant film to investigate the enhancement in heat and mass transfer between air and desiccant film for dehumidification and cooling processes of the air and regeneration of desiccant film. A detailed comparative study between parallel and counter flow channels is performed using a parametric study to investigate the enhancements in dehumidification, cooling, and regeneration processes in terms of the pertinent parameters. The results reveal that the parallel flow arrangement provides better dehumidification and cooling for the air than the counter flow channel for a wide range of parameters. Next, the inclined parallel and counter flow configurations are investigated using an Alternating Direction Implicit (ADI) and successive over-relaxation methods to discretize the vorticity and stream-function equations, respectively. A parametric study is employed to investigate the inclination angle effects in enhancing the heat and mass transfer in terms of the controlling parameters. It is shown that inclination angle plays a significant role in enhancing the dehumidification, cooling, and regeneration processes. Finally, the enhancements in heat and mass transfer in cross flow channel between air and desiccant film is examined based on a parametric study to investigate the dehumidification and cooling processes of the air in terms of the pertinent controlling parameters. These parameters are air and desiccant Reynolds numbers, dimensions of the channel, volume fraction of Cu-ultrafine particles, and thermal dispersion effects. It is found that an increase in the Cu-volume fraction enhances dehumidification and cooling capabilities and produces more stable Cu-desiccant film.
KAMBIZ VAFAI (Advisor)
FILM DESICCANT; flow channel

Recommended Citations

Citations

  • Ali, A. A. (2003). Analysis of heat and mass transfer between air and falling film desiccant for different flow configurations in the presense of ultrafine particles [Doctoral dissertation, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1060028115

    APA Style (7th edition)

  • Ali, Ahmad. Analysis of heat and mass transfer between air and falling film desiccant for different flow configurations in the presense of ultrafine particles. 2003. Ohio State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1060028115.

    MLA Style (8th edition)

  • Ali, Ahmad. "Analysis of heat and mass transfer between air and falling film desiccant for different flow configurations in the presense of ultrafine particles." Doctoral dissertation, Ohio State University, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=osu1060028115

    Chicago Manual of Style (17th edition)

osu1060028115
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© 2003, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.