Heat Transfer Characteristics in a Large-Scale Bubble Column Operating in a Semi – Batch Mode
Time-averaged local heat transfer coefficient profiles were studied in a 0.45m bubble column using air-water system. The effect of the superficial gas velocity andaxial locations (Z/D) on the heat transfer coefficient and its radial (r/R) profiles wereinvestigated in bubble column. Significant diffe...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Unviversity of Technology- Iraq
2010-01-01
|
| Series: | Engineering and Technology Journal |
| Subjects: | |
| Online Access: | https://etj.uotechnology.edu.iq/article_26979_b0f4870b875ccd7cd888c8e45ab1a6e5.pdf |
| _version_ | 1827358297169068032 |
|---|---|
| author | Rahman Sh. Abdulmohsin Balasim A. Abid |
| author_facet | Rahman Sh. Abdulmohsin Balasim A. Abid |
| author_sort | Rahman Sh. Abdulmohsin |
| collection | DOAJ |
| description | Time-averaged local heat transfer coefficient profiles were studied in a 0.45m bubble column using air-water system. The effect of the superficial gas velocity andaxial locations (Z/D) on the heat transfer coefficient and its radial (r/R) profiles wereinvestigated in bubble column. Significant differences were observed between heattransfer coefficients in the axial directions viz. in the bulk flow region (Z/D=4.8)higher than in the distributor region (Z/D=0.28) by 14% -22% for increasing thesuperficial gas velocity from 0.05-0.45 m/s. The heat transfer coefficients increasewith superficial gas velocities and the values in the center of the column were 9–13%greater than those near the wall region .The characteristics of bulk flow region arelarge variation in radial direction and little in axial direction for the values of heattransfer coefficients. |
| first_indexed | 2024-03-08T06:08:42Z |
| format | Article |
| id | doaj.art-9059606123f3472a9060ddb491ea953d |
| institution | Directory Open Access Journal |
| issn | 1681-6900 2412-0758 |
| language | English |
| last_indexed | 2024-03-08T06:08:42Z |
| publishDate | 2010-01-01 |
| publisher | Unviversity of Technology- Iraq |
| record_format | Article |
| series | Engineering and Technology Journal |
| spelling | doaj.art-9059606123f3472a9060ddb491ea953d2024-02-04T17:44:23ZengUnviversity of Technology- IraqEngineering and Technology Journal1681-69002412-07582010-01-0128356257810.30684/etj.28.3.1426979Heat Transfer Characteristics in a Large-Scale Bubble Column Operating in a Semi – Batch ModeRahman Sh. AbdulmohsinBalasim A. AbidTime-averaged local heat transfer coefficient profiles were studied in a 0.45m bubble column using air-water system. The effect of the superficial gas velocity andaxial locations (Z/D) on the heat transfer coefficient and its radial (r/R) profiles wereinvestigated in bubble column. Significant differences were observed between heattransfer coefficients in the axial directions viz. in the bulk flow region (Z/D=4.8)higher than in the distributor region (Z/D=0.28) by 14% -22% for increasing thesuperficial gas velocity from 0.05-0.45 m/s. The heat transfer coefficients increasewith superficial gas velocities and the values in the center of the column were 9–13%greater than those near the wall region .The characteristics of bulk flow region arelarge variation in radial direction and little in axial direction for the values of heattransfer coefficients.https://etj.uotechnology.edu.iq/article_26979_b0f4870b875ccd7cd888c8e45ab1a6e5.pdfbubble columnslargescaleheat transfer coefficientaxial locationradial profile |
| spellingShingle | Rahman Sh. Abdulmohsin Balasim A. Abid Heat Transfer Characteristics in a Large-Scale Bubble Column Operating in a Semi – Batch Mode Engineering and Technology Journal bubble columns large scale heat transfer coefficient axial location radial profile |
| title | Heat Transfer Characteristics in a Large-Scale Bubble Column Operating in a Semi – Batch Mode |
| title_full | Heat Transfer Characteristics in a Large-Scale Bubble Column Operating in a Semi – Batch Mode |
| title_fullStr | Heat Transfer Characteristics in a Large-Scale Bubble Column Operating in a Semi – Batch Mode |
| title_full_unstemmed | Heat Transfer Characteristics in a Large-Scale Bubble Column Operating in a Semi – Batch Mode |
| title_short | Heat Transfer Characteristics in a Large-Scale Bubble Column Operating in a Semi – Batch Mode |
| title_sort | heat transfer characteristics in a large scale bubble column operating in a semi batch mode |
| topic | bubble columns large scale heat transfer coefficient axial location radial profile |
| url | https://etj.uotechnology.edu.iq/article_26979_b0f4870b875ccd7cd888c8e45ab1a6e5.pdf |
| work_keys_str_mv | AT rahmanshabdulmohsin heattransfercharacteristicsinalargescalebubblecolumnoperatinginasemibatchmode AT balasimaabid heattransfercharacteristicsinalargescalebubblecolumnoperatinginasemibatchmode |