Cooling liquid flow boiling heat transfer in an annular minigap with an enhanced wall
The paper focused on flow boiling heat transfer in an annular minigap. This gap of 1 mm width was created between the metal pipe with an enhanced surface contacting fluid and the external glass pipe positioned along the same axis. The heated element for the HFE-649 flowing in the minigap was a cartr...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2019-01-01
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| Series: | EPJ Web of Conferences |
| Online Access: | https://www.epj-conferences.org/articles/epjconf/pdf/2019/18/epjconf_efm18_02066.pdf |
| _version_ | 1818438651610136576 |
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| author | Piasecka Magdalena Musiał Tomasz Piasecki Artur |
| author_facet | Piasecka Magdalena Musiał Tomasz Piasecki Artur |
| author_sort | Piasecka Magdalena |
| collection | DOAJ |
| description | The paper focused on flow boiling heat transfer in an annular minigap. This gap of 1 mm width was created between the metal pipe with an enhanced surface contacting fluid and the external glass pipe positioned along the same axis. The heated element for the HFE-649 flowing in the minigap was a cartridge heater. Thermocouples were used to measure the temperature of the metal pipe in the contact surface with a fluid. The local values of the heat transfer coefficient for stationary state conditions were calculated using an one-dimensional method in which the multilayer cylindrical wall was assumed to be planar. The results were presented as a function of the heat transfer coefficient along the minigap length and as boiling curves, prepared for selected values of mass flow rate and five types of the enhanced heated surface and a smooth one. Observations indicated that the highest local values of heat transfer coefficient were obtained with using the enhanced surface produced by electromachining process (spark erosion) at the saturated boiling region. The boiling curves generated for two distances from the minigap inlet have similar plots without a drop in the temperature of the heated surface characteristic for nucleation hysteresis. |
| first_indexed | 2024-12-14T17:43:57Z |
| format | Article |
| id | doaj.art-b05a809ecb7641d7b2f9ad3a3320e1c6 |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-12-14T17:43:57Z |
| publishDate | 2019-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-b05a809ecb7641d7b2f9ad3a3320e1c62022-12-21T22:52:47ZengEDP SciencesEPJ Web of Conferences2100-014X2019-01-012130206610.1051/epjconf/201921302066epjconf_efm18_02066Cooling liquid flow boiling heat transfer in an annular minigap with an enhanced wallPiasecka MagdalenaMusiał TomaszPiasecki Artur0Circle of Health TourismThe paper focused on flow boiling heat transfer in an annular minigap. This gap of 1 mm width was created between the metal pipe with an enhanced surface contacting fluid and the external glass pipe positioned along the same axis. The heated element for the HFE-649 flowing in the minigap was a cartridge heater. Thermocouples were used to measure the temperature of the metal pipe in the contact surface with a fluid. The local values of the heat transfer coefficient for stationary state conditions were calculated using an one-dimensional method in which the multilayer cylindrical wall was assumed to be planar. The results were presented as a function of the heat transfer coefficient along the minigap length and as boiling curves, prepared for selected values of mass flow rate and five types of the enhanced heated surface and a smooth one. Observations indicated that the highest local values of heat transfer coefficient were obtained with using the enhanced surface produced by electromachining process (spark erosion) at the saturated boiling region. The boiling curves generated for two distances from the minigap inlet have similar plots without a drop in the temperature of the heated surface characteristic for nucleation hysteresis.https://www.epj-conferences.org/articles/epjconf/pdf/2019/18/epjconf_efm18_02066.pdf |
| spellingShingle | Piasecka Magdalena Musiał Tomasz Piasecki Artur Cooling liquid flow boiling heat transfer in an annular minigap with an enhanced wall EPJ Web of Conferences |
| title | Cooling liquid flow boiling heat transfer in an annular minigap with an enhanced wall |
| title_full | Cooling liquid flow boiling heat transfer in an annular minigap with an enhanced wall |
| title_fullStr | Cooling liquid flow boiling heat transfer in an annular minigap with an enhanced wall |
| title_full_unstemmed | Cooling liquid flow boiling heat transfer in an annular minigap with an enhanced wall |
| title_short | Cooling liquid flow boiling heat transfer in an annular minigap with an enhanced wall |
| title_sort | cooling liquid flow boiling heat transfer in an annular minigap with an enhanced wall |
| url | https://www.epj-conferences.org/articles/epjconf/pdf/2019/18/epjconf_efm18_02066.pdf |
| work_keys_str_mv | AT piaseckamagdalena coolingliquidflowboilingheattransferinanannularminigapwithanenhancedwall AT musiałtomasz coolingliquidflowboilingheattransferinanannularminigapwithanenhancedwall AT piaseckiartur coolingliquidflowboilingheattransferinanannularminigapwithanenhancedwall |