Two-Phase Flow and Heat Transfer during Steam Condensation in a Converging Microchannel with Different Convergence Angles
The present study experimentally investigates the effect of convergence angle of microchannel on two-phase flow and heat transfer during steam condensation. Three condensation regimes, from the inlet to the outlet, are identified: mist/annular flow, injection flow, and slug-bubbly flow. Flow pattern...
| 主要な著者: | , , |
|---|---|
| フォーマット: | 論文 |
| 言語: | English |
| 出版事項: |
SAGE Publishing
2013-01-01
|
| シリーズ: | Advances in Mechanical Engineering |
| オンライン･アクセス: | https://doi.org/10.1155/2013/372898 |
| _version_ | 1829102228622802944 |
|---|---|
| author | Ben-Ran Fu T. H. Chang Chin Pan |
| author_facet | Ben-Ran Fu T. H. Chang Chin Pan |
| author_sort | Ben-Ran Fu |
| collection | DOAJ |
| description | The present study experimentally investigates the effect of convergence angle of microchannel on two-phase flow and heat transfer during steam condensation. Three condensation regimes, from the inlet to the outlet, are identified: mist/annular flow, injection flow, and slug-bubbly flow. Flow pattern maps are constructed using superficial vapor and liquid velocities as the coordinates, wherein relatively distinct boundaries between the flow patterns can be identified. The experimental results show that the condensation heat flux increases with an increase in the convergence angle and/or the steam mass flux at a given coolant flow ratebut decreases with an increase in the coolant flow rate at a given steam mass flux. The results further demonstrate that the local condensation heat transfer coefficient in the mist/annular flow region is much higher than that in other condensation regimes. Moreover, the local condensation heat transfer coefficient in the mist/annular flow and injection flow region decreases with an increase in the convergence angle. |
| first_indexed | 2024-12-10T22:56:32Z |
| format | Article |
| id | doaj.art-60d0ca3480fb47b4b1de4e44a25e96d9 |
| institution | Directory Open Access Journal |
| issn | 1687-8132 |
| language | English |
| last_indexed | 2024-12-10T22:56:32Z |
| publishDate | 2013-01-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Advances in Mechanical Engineering |
| spelling | doaj.art-60d0ca3480fb47b4b1de4e44a25e96d92022-12-22T01:30:16ZengSAGE PublishingAdvances in Mechanical Engineering1687-81322013-01-01510.1155/2013/37289810.1155_2013/372898Two-Phase Flow and Heat Transfer during Steam Condensation in a Converging Microchannel with Different Convergence AnglesBen-Ran Fu0T. H. Chang1Chin Pan2 Green Energy and Environment Research Laboratories, Industrial Technology Research Institute, Hsinchu 31040, Taiwan Department of Engineering and System Science, National Tsing Hua University, Hsinchu 30013, Taiwan Low Carbon Energy Research Center, National Tsing Hua University, Hsinchu 30013, TaiwanThe present study experimentally investigates the effect of convergence angle of microchannel on two-phase flow and heat transfer during steam condensation. Three condensation regimes, from the inlet to the outlet, are identified: mist/annular flow, injection flow, and slug-bubbly flow. Flow pattern maps are constructed using superficial vapor and liquid velocities as the coordinates, wherein relatively distinct boundaries between the flow patterns can be identified. The experimental results show that the condensation heat flux increases with an increase in the convergence angle and/or the steam mass flux at a given coolant flow ratebut decreases with an increase in the coolant flow rate at a given steam mass flux. The results further demonstrate that the local condensation heat transfer coefficient in the mist/annular flow region is much higher than that in other condensation regimes. Moreover, the local condensation heat transfer coefficient in the mist/annular flow and injection flow region decreases with an increase in the convergence angle.https://doi.org/10.1155/2013/372898 |
| spellingShingle | Ben-Ran Fu T. H. Chang Chin Pan Two-Phase Flow and Heat Transfer during Steam Condensation in a Converging Microchannel with Different Convergence Angles Advances in Mechanical Engineering |
| title | Two-Phase Flow and Heat Transfer during Steam Condensation in a Converging Microchannel with Different Convergence Angles |
| title_full | Two-Phase Flow and Heat Transfer during Steam Condensation in a Converging Microchannel with Different Convergence Angles |
| title_fullStr | Two-Phase Flow and Heat Transfer during Steam Condensation in a Converging Microchannel with Different Convergence Angles |
| title_full_unstemmed | Two-Phase Flow and Heat Transfer during Steam Condensation in a Converging Microchannel with Different Convergence Angles |
| title_short | Two-Phase Flow and Heat Transfer during Steam Condensation in a Converging Microchannel with Different Convergence Angles |
| title_sort | two phase flow and heat transfer during steam condensation in a converging microchannel with different convergence angles |
| url | https://doi.org/10.1155/2013/372898 |
| work_keys_str_mv | AT benranfu twophaseflowandheattransferduringsteamcondensationinaconvergingmicrochannelwithdifferentconvergenceangles AT thchang twophaseflowandheattransferduringsteamcondensationinaconvergingmicrochannelwithdifferentconvergenceangles AT chinpan twophaseflowandheattransferduringsteamcondensationinaconvergingmicrochannelwithdifferentconvergenceangles |