An analysis of saturated critical heat flux in micro/mini-channels
(2010) ASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM2010 Collocated with 3rd Joint US-European Fluids Engineering Summer Meeting p.137-146- Abstract
This paper verified the macro-to-micro-scale transitional criterion BoRel 0.5 = 200 proposed by Li and Wu [W. Li, Z. Wu, A general criterion for evaporative heat transfer in micro/minichannels, International Journal of Heat and Mass Transfer 53 (2010) 1967-1976] because data points where BoRel 0.5 ≤ 200 and BoRel
0.5 > 200 show very different trends for the entire database (1,672 data points). For the 859 data points with BoRel
0.5 ≤ 200, the boiling number at CHF decreases greatly with length-to-diameter ratio Lh/dhe when Lh/dhe is small, while Lh/dhe presents negligible effect on the boiling... (More)This paper verified the macro-to-micro-scale transitional criterion BoRel 0.5 = 200 proposed by Li and Wu [W. Li, Z. Wu, A general criterion for evaporative heat transfer in micro/minichannels, International Journal of Heat and Mass Transfer 53 (2010) 1967-1976] because data points where BoRel 0.5 ≤ 200 and BoRel
(Less)
0.5 > 200 show very different trends for the entire database (1,672 data points). For the 859 data points with BoRel
0.5 ≤ 200, the boiling number at CHF decreases greatly with length-to-diameter ratio Lh/dhe when Lh/dhe is small, while Lh/dhe presents negligible effect on the boiling number when Lh/dhe < 150. For the region where L h/dhe ≤ 150 and BoRel
0.5 ≤ 200, a simple saturated CHF correlation was proposed by using the boiling number, length-to-diameter ratio, and exit quality. Heated length and heated equivalent diameter were adopted in the length-to-diameter ratio, considering the actual heat transfer conditions. A combined dimensionless number We mCal
0.8was introduced to correlate the micro/mini-channel database for the region: Lh/dhe > 150 and BoRel
0.5 ≤ 200. The new method can predict the overall micro/mini-channel database accurately on the whole. It can predict almost 95.5% of the non-aqueous data and 93.5% of the water data within the ± 30% error band.
- author
- Wu, Zan LU ; Li, Wei LU and Wang, Zhike
- publishing date
- 2010-12-01
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- Boiling number, Capillary number, Length-to-diameter ratio, Microchannel, Saturated critical heat flux (CHF), Weber number
- host publication
- ASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels Collocated with 3rd Joint US-European Fluids Engineering Summer Meeting, ICNMM2010
- article number
- FEDSM-ICNMM2010-30603
- edition
- PARTS A AND B
- pages
- 10 pages
- conference name
- ASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM2010 Collocated with 3rd Joint US-European Fluids Engineering Summer Meeting
- conference location
- Montreal, QC, Canada
- conference dates
- 2010-08-01 - 2010-08-05
- external identifiers
-
- scopus:84862931832
- ISBN
- 978-0-7918-3880-8
- 9780791854501
- DOI
- 10.1115/FEDSM-ICNMM2010-30603
- language
- English
- LU publication?
- no
- id
- c3b2e7a6-0cb2-41dc-a89a-c478604bbb31
- date added to LUP
- 2018-11-01 09:27:12
- date last changed
- 2024-01-15 05:39:00
@inproceedings{c3b2e7a6-0cb2-41dc-a89a-c478604bbb31, abstract = {{<p>This paper verified the macro-to-micro-scale transitional criterion BoRel 0.5 = 200 proposed by Li and Wu [W. Li, Z. Wu, A general criterion for evaporative heat transfer in micro/minichannels, International Journal of Heat and Mass Transfer 53 (2010) 1967-1976] because data points where BoRel <sup>0.5</sup> ≤ 200 and BoRe<sub>l</sub><br> <sup>0.5</sup> > 200 show very different trends for the entire database (1,672 data points). For the 859 data points with BoRe<sub>l</sub><br> <sup>0.5</sup> ≤ 200, the boiling number at CHF decreases greatly with length-to-diameter ratio Lh/dhe when Lh/dhe is small, while L<sub>h</sub>/d<sub>he</sub> presents negligible effect on the boiling number when L<sub>h</sub>/d<sub>he</sub> < 150. For the region where L <sub>h</sub>/d<sub>he</sub> ≤ 150 and BoRe<sub>l</sub><br> <sup>0.5</sup> ≤ 200, a simple saturated CHF correlation was proposed by using the boiling number, length-to-diameter ratio, and exit quality. Heated length and heated equivalent diameter were adopted in the length-to-diameter ratio, considering the actual heat transfer conditions. A combined dimensionless number We <sub>m</sub>Ca<sub>l</sub><br> <sup>0.8</sup>was introduced to correlate the micro/mini-channel database for the region: L<sub>h</sub>/d<sub>he</sub> > 150 and BoRe<sub>l</sub><br> <sup>0.5</sup> ≤ 200. The new method can predict the overall micro/mini-channel database accurately on the whole. It can predict almost 95.5% of the non-aqueous data and 93.5% of the water data within the ± 30% error band.</p>}}, author = {{Wu, Zan and Li, Wei and Wang, Zhike}}, booktitle = {{ASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels Collocated with 3rd Joint US-European Fluids Engineering Summer Meeting, ICNMM2010}}, isbn = {{978-0-7918-3880-8}}, keywords = {{Boiling number; Capillary number; Length-to-diameter ratio; Microchannel; Saturated critical heat flux (CHF); Weber number}}, language = {{eng}}, month = {{12}}, pages = {{137--146}}, title = {{An analysis of saturated critical heat flux in micro/mini-channels}}, url = {{http://dx.doi.org/10.1115/FEDSM-ICNMM2010-30603}}, doi = {{10.1115/FEDSM-ICNMM2010-30603}}, year = {{2010}}, }