Boiling heat transfer enhancement in subsurface horizontal and vertical tunnels

Pastuszko, Robert

doi:10.1016/j.expthermflusci.2008.04.012

Cited by 30 publications

(19 citation statements)

References 9 publications

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“…1). The measurement stand for external visualization is a modified set-up described in [6]. The design of the module with rectangular glass vessel made it possible to observe the vapor bubble growth and bubble shape, to determine the size of the departing bubbles, and to determine the frequency at which vapor bubbles are generated at vertical tunnel outlets.…”

Section: Experimental Set-upmentioning

confidence: 99%

Boiling visualization on vertical fins with tunnel-pore structures

Pastuszko

Kaniowski

2012

EPJ Web of Conferences

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Section: Experimental Set-upmentioning

confidence: 99%

Boiling visualization on vertical fins with tunnel-pore structures

Pastuszko

Kaniowski

2012

EPJ Web of Conferences

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“…The investigated tunnel surfaces were designed to allow the separation of the liquid suction sites (pores in vertical tunnel) from growing bubbles at tunnel outlet [5]. …”

Section: Ts Surfacesmentioning

confidence: 99%

“…The measurement data for the three types of working fluid used in the studies were taken from [5,6,7,8].…”

Section: Introduction Amentioning

confidence: 99%

Hysteresis of boiling for different tunnel-pore surfaces

Pastuszko

Piasecka

2015

EPJ Web of Conferences

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Abstract. Analysis of boiling hysteresis on structured surfaces covered with perforated foil is proposed. Hysteresis is an adverse phenomenon, preventing high heat flux systems from thermal stabilization, characterized by a boiling curve variation at an increase and decrease of heat flux density. Experimental data were discussed for three kinds of enhanced surfaces: tunnel structures (TS), narrow tunnel structures (NTS) and mini-fins covered with the copper wire net (NTS-L). The experiments were carried out with water, R-123 and FC-72 at atmospheric pressure. A detailed analysis of the measurement results identified several cases of type I, II and III for TS, NTS and NTS-L surfaces.

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“…A model was developed to predict the heat transfer coefficient of individual tube in a multi-tube row and the bundle heat transfer coefficient. Da Silva et al [7] presented an experimental investigation of nucleate boiling on a vertical array of horizontal plain tubes. A general correlation for the prediction of the nucleate boiling heat transfer coefficient on a vertical array of horizontal tubes under flooded conditions was proposed.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of sub-cooled boiling flow with fouling deposited inside channels

Liu

Zhang²,

Lü

et al. 2016

Applied Thermal Engineering

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Abstract:In this article, a numerical simulation has been performed to investigate the sub-cooled boiling flow in axisymmetric channels using the two-phase particle model. The equivalent diameter of the channel is 4.38 mm with 365.7 cm in length. The fouling deposited layer is filled with The Nusselt number in the fouling region without fouling deposited could be 50 times higher than that with fouling layer. The heat transfer performance of the channel with thickness of 0.225 mm fouling deposit layer is 5 times larger than that with thickness of 1.55 mm fouling deposit layer. It is also found that the inlet velocity has significant impact on the boiling and total pressure drops along the channel. Keywords

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Boiling heat transfer enhancement in subsurface horizontal and vertical tunnels

Cited by 30 publications

References 9 publications

Boiling visualization on vertical fins with tunnel-pore structures

Boiling visualization on vertical fins with tunnel-pore structures

Hysteresis of boiling for different tunnel-pore surfaces

Numerical simulation of sub-cooled boiling flow with fouling deposited inside channels

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