Investigation of heat transfer in a microchannel with same heat capacity rate
In this paper, a new experimental setup was proposed to realize the constant-heat-flux boundary condition based on a counter flow microchannel heat exchanger with the same heat capacity rate of the hot and cold streams. This approach provides a constant fluid temperature gradient along the surfaces....
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2021
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/150797 |
| _version_ | 1826116061588619264 |
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| author | Xu, Bin Wong, Teck Neng Nguyen, Nam-Trung |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Xu, Bin Wong, Teck Neng Nguyen, Nam-Trung |
| author_sort | Xu, Bin |
| collection | NTU |
| description | In this paper, a new experimental setup was proposed to realize the constant-heat-flux boundary condition based on a counter flow microchannel heat exchanger with the same heat capacity rate of the hot and cold streams. This approach provides a constant fluid temperature gradient along the surfaces. An analytical two-dimensional model was developed to describe the heat transfer processes in the hot stream and the cold stream, respectively. In the experiments, DI-water was employed as the working fluid. Laser induced fluorescence (LIF) method was used to measure the fluid temperature field within the microchannel. Different combinations of flow rates were studied to investigate the heat transfer characteristics in the microchannel. The measured mean temperature distribution matched well with the proposed analytical model. A correlation for Nusselt number (Nu) was proposed based on the experimental Reynolds number (Re < 1) and Prandtl number (Pr). |
| first_indexed | 2024-10-01T04:05:15Z |
| format | Journal Article |
| id | ntu-10356/150797 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:05:15Z |
| publishDate | 2021 |
| record_format | dspace |
| spelling | ntu-10356/1507972021-06-02T04:08:41Z Investigation of heat transfer in a microchannel with same heat capacity rate Xu, Bin Wong, Teck Neng Nguyen, Nam-Trung School of Mechanical and Aerospace Engineering Engineering::Mechanical engineering Heat Flux Microchannels In this paper, a new experimental setup was proposed to realize the constant-heat-flux boundary condition based on a counter flow microchannel heat exchanger with the same heat capacity rate of the hot and cold streams. This approach provides a constant fluid temperature gradient along the surfaces. An analytical two-dimensional model was developed to describe the heat transfer processes in the hot stream and the cold stream, respectively. In the experiments, DI-water was employed as the working fluid. Laser induced fluorescence (LIF) method was used to measure the fluid temperature field within the microchannel. Different combinations of flow rates were studied to investigate the heat transfer characteristics in the microchannel. The measured mean temperature distribution matched well with the proposed analytical model. A correlation for Nusselt number (Nu) was proposed based on the experimental Reynolds number (Re < 1) and Prandtl number (Pr). 2021-06-02T04:08:41Z 2021-06-02T04:08:41Z 2019 Journal Article Xu, B., Wong, T. N. & Nguyen, N. (2019). Investigation of heat transfer in a microchannel with same heat capacity rate. Heat and Mass Transfer, 55(3), 899-909. https://dx.doi.org/10.1007/s00231-018-2477-1 0947-7411 0000-0001-6710-5630 https://hdl.handle.net/10356/150797 10.1007/s00231-018-2477-1 2-s2.0-85053449840 3 55 899 909 en Heat and Mass Transfer © 2018 Springer-Verlag GmbH Germany, part of Springer Nature. All rights reserved. |
| spellingShingle | Engineering::Mechanical engineering Heat Flux Microchannels Xu, Bin Wong, Teck Neng Nguyen, Nam-Trung Investigation of heat transfer in a microchannel with same heat capacity rate |
| title | Investigation of heat transfer in a microchannel with same heat capacity rate |
| title_full | Investigation of heat transfer in a microchannel with same heat capacity rate |
| title_fullStr | Investigation of heat transfer in a microchannel with same heat capacity rate |
| title_full_unstemmed | Investigation of heat transfer in a microchannel with same heat capacity rate |
| title_short | Investigation of heat transfer in a microchannel with same heat capacity rate |
| title_sort | investigation of heat transfer in a microchannel with same heat capacity rate |
| topic | Engineering::Mechanical engineering Heat Flux Microchannels |
| url | https://hdl.handle.net/10356/150797 |
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