Experimental study of critical heat flux in flow boiling under subatmospheric pressure in a vertical square channel
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Other documents of the author: Colgan, Nathan; Bottini, Joseph L.; Martinez Cuenca, Raul; Brooks, Caleb S.
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comunitat-uji-handle2:10234/7035
comunitat-uji-handle3:10234/8617
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https://doi.org/10.1016/j.ijheatmasstransfer.2018.10.082 |
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Title
Experimental study of critical heat flux in flow boiling under subatmospheric pressure in a vertical square channelDate
2019-03Publisher
ElsevierBibliographic citation
COLGAN, Nathan, et al. Experimental study of critical heat flux in flow boiling under subatmospheric pressure in a vertical square channel. International Journal of Heat and Mass Transfer, 2019, 130: 514-522.Type
info:eu-repo/semantics/articlePublisher version
https://www.sciencedirect.com/science/article/pii/S0017931018339590Version
info:eu-repo/semantics/publishedVersionSubject
Abstract
Critical Heat Flux (CHF) is the maximal limit of heat flux in two-phase nucleate boiling heat transfer; therefore, an understanding of CHF under a wide range of conditions is important for safe system operation. In ... [+]
Critical Heat Flux (CHF) is the maximal limit of heat flux in two-phase nucleate boiling heat transfer; therefore, an understanding of CHF under a wide range of conditions is important for safe system operation. In this work, CHF experiments are conducted over a range of subatmospheric system pressures in a vertical square channel that is heated on one side. The experimental conditions cover a pressure range of 20 kPa to 108 kPa, a mass flux range of 45–190 kg/m2-s, and an inlet subcooling range of 0–14 K. Heat flux is gradually increased until an excursion of the wall temperature occurs, indicating CHF. For the experimental conditions considered, CHF increases with rising system pressure, mass flux, and inlet subcooling, although the effects of mass flux and inlet subcooling are weak. A new correlation for CHF is developed and found to predict the data with an average error of ±15.6%. [-]
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