Results 261 to 270 of about 67,496 (315)

Consideration of critical heat flux margin prediction by subcooled or low quality critical heat flux correlations

Nuclear Engineering and Design, 1996
The accurate prediction of the critical heat flux (CHF) margin which is a key design parameter in a variety of cooling and heating systems is of high importance. These margins are, for the low quality region, typically expressed in terms of critical heat flux ratios using the direct substitution method.
Pavel Hejzlar, Neil E. Todreas
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Boiling Heat Transfer and Critical Heat Flux

2016
The phase change transition phenomenon from liquid phase to gas phase is called boiling. Boiling heat transfer is a heat transfer that transfers heat from the heat transfer wall surface to the fluid accompanied with vapor bubbles or vapor slugs under the conditions where wall surface temperature and the fluid temperature adjacent to the wall surface ...
Hajime Akimoto, Yoshinari Anoda, Kazuyuki Takase, Hiroyuki Yoshida, Hidesada Tamai   +4 more
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Nano Fluids and Critical Heat Flux

ASME 2008 First International Conference on Micro/Nanoscale Heat Transfer, Parts A and B, 2008
In recent years nanofluids have been attracting significant attention in the heat transfer research community. These fluids are obtained by suspending nanoparticles having sizes between 1 and 100 nm in regular fluids. It was found by several researchers that the thermal conductivity of these fluids can be significantly increased when compared to the ...
Mihajlo Golubovic, H. D. Madhawa Hettiarachchi, William M. Worek   +2 more
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Critical Heat Flux in Subcooled Flow Boiling

Proceeding of International Heat Transfer Conference 11, 1998
This chapter reports a survey of recent experimental work performed to obtain parametric trends of critical heat flux (CHF) in water-subcooled flow boiling, with special concern for high liquid velocity and subcooling, small-diameter channels, and low-intermediate pressure, together with a review of current modeling analysis.
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Applied Research in Critical Heat Flux

Nuclear Technology, 1992
In this paper critical heat flux (CHF) in boiling water and pressurized water reactors is investigated using a three-pronged approach. First, a physically realistic and mathematically rigorous computational model is developed to describe and simulate the transitions between flow regimes.
Jeffrey T. Dillingham, James H. Stuhmiller   +1 more
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Critical Heat Flux in Flow Boiling

2021
Critical heat flux (CHF) during pool boiling was discussed in Chapter 3. Similar phenomena also occur during forced convection boiling. A sharp deterioration in heat transfer occurs at some point with increasing heat flux or quality. The heat flux at which the deterioration in heat transfer occurs is known as the CHF and the corresponding quality is ...
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Diameter effect on critical heat flux

Nuclear Engineering and Design, 2009
Abstract The critical heat flux look-up table (CHF LUT) is widely used to predict CHF for various applications, including design and safety analysis of nuclear reactors. Using the CHF LUT for round tubes having inside diameters different from the reference 8 mm involves conversion of CHF to 8 mm. Different authors [Becker, K.M., 1965.
A. Tanase, S.C. Cheng, D.C. Groeneveld, J.Q. Shan   +3 more
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Prediction of Critical Heat Flux in Microchannels

2010
An overview of the state-of-the-art of predicting critical heat flux during saturated flow boiling in microchannels is presented. First, a selection of experimental results is described for single channels and for multi-channels in parallel, including non-circular channel shapes.
J. R. Thome, L. Consolini
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On the definition of critical heat flux margin

Nuclear Engineering and Design, 1996
This paper reviews the current definition of critical heat flux (CHF) margins and discusses their differences.
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Critical Heat Flux in Flow Boiling

1990
Abstract In Chapter 16 (see, for example, Fig. 16.2) it was seen that the heat transfer coefficient in flow boiling could fall rapidly and the wall temperature increase rapidly at some point along the heated channel. This phenomenon is known by many names, none of them entirely satisfactory.
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