The Influence of Convection Heat Transfers for Vertical Mini-Tubes Using Solvent Carbon Dioxide and Porous Media at Supercritical Pressure
Porous media and solvent CO2 at supercritical pressure were investigated experimentally to study the effect of convection heat transfer in vertical mini-tubes. Mini-tubes diameter (5 and 8 mm) with medium porosity of 0.5 are proposed in experimental investigation. Experimental conditions consisted o...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Unviversity of Technology- Iraq
2021-09-01
|
| Series: | Engineering and Technology Journal |
| Subjects: | |
| Online Access: | https://etj.uotechnology.edu.iq/article_169322_946609612600834796e63a52992482f8.pdf |
| _version_ | 1827366731920703488 |
|---|---|
| author | Bilal Kkihlefa Ameer Jaddoa Ahmed Reja |
| author_facet | Bilal Kkihlefa Ameer Jaddoa Ahmed Reja |
| author_sort | Bilal Kkihlefa |
| collection | DOAJ |
| description | Porous media and solvent CO2 at supercritical pressure were investigated experimentally to study the effect of convection heat transfer in vertical mini-tubes. Mini-tubes diameter (5 and 8 mm) with medium porosity of 0.5 are proposed in experimental investigation. Experimental conditions consisted of bulk fluid, wall temperatures ranged from 33 to 55 oC, and 8 to 10 MPa of pressure. Reynolds number, Mass flow rate, and heat flux were 1750 to 21000, 0.5 to 4.5 Kg/h, and 3.25×104 to 1.1×105 W/m2 respectively. Some chemical additives like Ethanol, Chloroform, Acetone, Dimethyl sulfoxide, and Methanol were considered. A special focus was dedicated to studying the influence of heat flux, inlet temperature, and mass flow rate at measured values of wall and fluid bulk temperatures, and coefficients of local heat transfer for mini-tubes and porous media. A higher effect was noticed on the convection heat transfer by buoyancy and properties of the thermophysical variable of solvent CO2 in mini-tube at vertical position. However, when these results were compared with the controls (empty tube) shoewn dramatically different results. Heat transfer coefficient was bigger about 4 times when using the porous media tube compared with the empty type in the case of using a 5% of acetone solvent. |
| first_indexed | 2024-03-08T08:54:53Z |
| format | Article |
| id | doaj.art-e74a0b10a75a4f14bd5007799311247c |
| institution | Directory Open Access Journal |
| issn | 1681-6900 2412-0758 |
| language | English |
| last_indexed | 2024-03-08T08:54:53Z |
| publishDate | 2021-09-01 |
| publisher | Unviversity of Technology- Iraq |
| record_format | Article |
| series | Engineering and Technology Journal |
| spelling | doaj.art-e74a0b10a75a4f14bd5007799311247c2024-02-01T07:18:27ZengUnviversity of Technology- IraqEngineering and Technology Journal1681-69002412-07582021-09-013991409141910.30684/etj.v39i9.2068169322The Influence of Convection Heat Transfers for Vertical Mini-Tubes Using Solvent Carbon Dioxide and Porous Media at Supercritical PressureBilal Kkihlefa0Ameer Jaddoa1Ahmed Reja2Electromechanical Mechanical Engineering Department, University of Technology, Baghdad, Iraq.Electromechanical Mechanical Engineering Department, University of Technology, Baghdad, Iraq.Electromechanical Mechanical Engineering Department, University of Technology, Baghdad, Iraq.Porous media and solvent CO2 at supercritical pressure were investigated experimentally to study the effect of convection heat transfer in vertical mini-tubes. Mini-tubes diameter (5 and 8 mm) with medium porosity of 0.5 are proposed in experimental investigation. Experimental conditions consisted of bulk fluid, wall temperatures ranged from 33 to 55 oC, and 8 to 10 MPa of pressure. Reynolds number, Mass flow rate, and heat flux were 1750 to 21000, 0.5 to 4.5 Kg/h, and 3.25×104 to 1.1×105 W/m2 respectively. Some chemical additives like Ethanol, Chloroform, Acetone, Dimethyl sulfoxide, and Methanol were considered. A special focus was dedicated to studying the influence of heat flux, inlet temperature, and mass flow rate at measured values of wall and fluid bulk temperatures, and coefficients of local heat transfer for mini-tubes and porous media. A higher effect was noticed on the convection heat transfer by buoyancy and properties of the thermophysical variable of solvent CO2 in mini-tube at vertical position. However, when these results were compared with the controls (empty tube) shoewn dramatically different results. Heat transfer coefficient was bigger about 4 times when using the porous media tube compared with the empty type in the case of using a 5% of acetone solvent.https://etj.uotechnology.edu.iq/article_169322_946609612600834796e63a52992482f8.pdfexperimental studyheat transfervertical mini-tubessolvent co2porous mediasupercritical fluid |
| spellingShingle | Bilal Kkihlefa Ameer Jaddoa Ahmed Reja The Influence of Convection Heat Transfers for Vertical Mini-Tubes Using Solvent Carbon Dioxide and Porous Media at Supercritical Pressure Engineering and Technology Journal experimental study heat transfer vertical mini-tubes solvent co2 porous media supercritical fluid |
| title | The Influence of Convection Heat Transfers for Vertical Mini-Tubes Using Solvent Carbon Dioxide and Porous Media at Supercritical Pressure |
| title_full | The Influence of Convection Heat Transfers for Vertical Mini-Tubes Using Solvent Carbon Dioxide and Porous Media at Supercritical Pressure |
| title_fullStr | The Influence of Convection Heat Transfers for Vertical Mini-Tubes Using Solvent Carbon Dioxide and Porous Media at Supercritical Pressure |
| title_full_unstemmed | The Influence of Convection Heat Transfers for Vertical Mini-Tubes Using Solvent Carbon Dioxide and Porous Media at Supercritical Pressure |
| title_short | The Influence of Convection Heat Transfers for Vertical Mini-Tubes Using Solvent Carbon Dioxide and Porous Media at Supercritical Pressure |
| title_sort | influence of convection heat transfers for vertical mini tubes using solvent carbon dioxide and porous media at supercritical pressure |
| topic | experimental study heat transfer vertical mini-tubes solvent co2 porous media supercritical fluid |
| url | https://etj.uotechnology.edu.iq/article_169322_946609612600834796e63a52992482f8.pdf |
| work_keys_str_mv | AT bilalkkihlefa theinfluenceofconvectionheattransfersforverticalminitubesusingsolventcarbondioxideandporousmediaatsupercriticalpressure AT ameerjaddoa theinfluenceofconvectionheattransfersforverticalminitubesusingsolventcarbondioxideandporousmediaatsupercriticalpressure AT ahmedreja theinfluenceofconvectionheattransfersforverticalminitubesusingsolventcarbondioxideandporousmediaatsupercriticalpressure AT bilalkkihlefa influenceofconvectionheattransfersforverticalminitubesusingsolventcarbondioxideandporousmediaatsupercriticalpressure AT ameerjaddoa influenceofconvectionheattransfersforverticalminitubesusingsolventcarbondioxideandporousmediaatsupercriticalpressure AT ahmedreja influenceofconvectionheattransfersforverticalminitubesusingsolventcarbondioxideandporousmediaatsupercriticalpressure |