A study of mechanism for the prevention of cold inflow into Chimneys using wire mesh
Cold air inflow has significant effect on a natural draft air cooled heat exchanger (NDACHE) chimney. To study the mechanism for the prevention of cold inflow into NDACHE chimney's, in total seven configuration of experiments were carried out In the prototype models for different heat loads at...
| Main Authors: | , , |
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| Format: | Research Report |
| Language: | English |
| Published: |
Universiti Malaysia Sabah
2013
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| Subjects: | |
| Online Access: | https://eprints.ums.edu.my/id/eprint/22800/1/A%20study%20of%20mechanism%20for%20the%20prevention%20of%20cold%20inflow%20into%20Chimneys%20using%20wire%20mesh.pdf |
| _version_ | 1825713664173277184 |
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| author | Chu, Chi Ming Sivakumar Kumaresan Tham Heng Jin |
| author_facet | Chu, Chi Ming Sivakumar Kumaresan Tham Heng Jin |
| author_sort | Chu, Chi Ming |
| collection | UMS |
| description | Cold air inflow has significant effect on a natural draft air cooled heat exchanger (NDACHE) chimney. To study the mechanism for the prevention of cold inflow into NDACHE chimney's, in total seven configuration of experiments were carried out In the prototype models for different heat loads at approximately 0.7SkW to 1.25kW. The effect of wire mesh screen on the chimney performance had also determined. Temperature and air velocity were measured for the configurations and heat loads. It was found that the top only, Top and Middle and Middle only installations were able to maintain draft velocity to within 3.0% of , the control experiment draft velocity in spite of the resistance of the mesh. It was also found that configurations utilizing mesh at the bottom had experienced a drop is draft velocity by
up to 50% from the control. The smoke flow visualization tests clearly proved that cold air inflow phenomenon exits and can be countered with the installation of wire mesh at the top of the model. In the second phase of the project, the wire mesh of 3 different apertures and two chimney height were tested. Large aperture tended to allow more cold inflow and draft was directly proportional to chimney height. CFD runs were also done for the prototypes to explain the cause of wire mesh serving as repellent of cold inflow. |
| first_indexed | 2024-03-06T03:00:03Z |
| format | Research Report |
| id | ums.eprints-22800 |
| institution | Universiti Malaysia Sabah |
| language | English |
| last_indexed | 2024-03-06T03:00:03Z |
| publishDate | 2013 |
| publisher | Universiti Malaysia Sabah |
| record_format | dspace |
| spelling | ums.eprints-228002019-07-18T13:50:12Z https://eprints.ums.edu.my/id/eprint/22800/ A study of mechanism for the prevention of cold inflow into Chimneys using wire mesh Chu, Chi Ming Sivakumar Kumaresan Tham Heng Jin TA Engineering (General). Civil engineering (General) Cold air inflow has significant effect on a natural draft air cooled heat exchanger (NDACHE) chimney. To study the mechanism for the prevention of cold inflow into NDACHE chimney's, in total seven configuration of experiments were carried out In the prototype models for different heat loads at approximately 0.7SkW to 1.25kW. The effect of wire mesh screen on the chimney performance had also determined. Temperature and air velocity were measured for the configurations and heat loads. It was found that the top only, Top and Middle and Middle only installations were able to maintain draft velocity to within 3.0% of , the control experiment draft velocity in spite of the resistance of the mesh. It was also found that configurations utilizing mesh at the bottom had experienced a drop is draft velocity by up to 50% from the control. The smoke flow visualization tests clearly proved that cold air inflow phenomenon exits and can be countered with the installation of wire mesh at the top of the model. In the second phase of the project, the wire mesh of 3 different apertures and two chimney height were tested. Large aperture tended to allow more cold inflow and draft was directly proportional to chimney height. CFD runs were also done for the prototypes to explain the cause of wire mesh serving as repellent of cold inflow. Universiti Malaysia Sabah 2013 Research Report NonPeerReviewed text en https://eprints.ums.edu.my/id/eprint/22800/1/A%20study%20of%20mechanism%20for%20the%20prevention%20of%20cold%20inflow%20into%20Chimneys%20using%20wire%20mesh.pdf Chu, Chi Ming and Sivakumar Kumaresan and Tham Heng Jin (2013) A study of mechanism for the prevention of cold inflow into Chimneys using wire mesh. (Unpublished) |
| spellingShingle | TA Engineering (General). Civil engineering (General) Chu, Chi Ming Sivakumar Kumaresan Tham Heng Jin A study of mechanism for the prevention of cold inflow into Chimneys using wire mesh |
| title | A study of mechanism for the prevention of cold inflow into Chimneys using wire mesh |
| title_full | A study of mechanism for the prevention of cold inflow into Chimneys using wire mesh |
| title_fullStr | A study of mechanism for the prevention of cold inflow into Chimneys using wire mesh |
| title_full_unstemmed | A study of mechanism for the prevention of cold inflow into Chimneys using wire mesh |
| title_short | A study of mechanism for the prevention of cold inflow into Chimneys using wire mesh |
| title_sort | study of mechanism for the prevention of cold inflow into chimneys using wire mesh |
| topic | TA Engineering (General). Civil engineering (General) |
| url | https://eprints.ums.edu.my/id/eprint/22800/1/A%20study%20of%20mechanism%20for%20the%20prevention%20of%20cold%20inflow%20into%20Chimneys%20using%20wire%20mesh.pdf |
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