Correlations for flow boiling heat transfer in minichannels with various orientations

Piasecka, Magdalena

doi:10.1016/j.ijheatmasstransfer.2014.09.063

Cited by 51 publications

(44 citation statements)

References 16 publications

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“…The analysis of experimental studies resulting from the author's experience in a flow boiling heat transfer in minichannels [1][2][3] indicates that lower heat flux was supplied using enhanced heated surfaces compared to the smooth surface. Values of the local heat transfer coefficient have proved higher when results from the enhanced heating surfaces were noticed [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

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Heat transfer research on enhanced heating surfaces in pool boiling

2017

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Abstract. The paper focuses on the analysis of the enhanced surfaces in such applications as boiling heat transfer. The testing measurement module with enhanced heating surfaces was used for pool boiling research. Pool boiling experiments were conducted with distilled water at atmospheric pressure in the vessel using an enhanced sample as the bottom heating surface. The samples are soldered to a copper heating block of the round cross-section .They were placed: in the fluid (saturation temperature measurement), under the sample for temperature determination. A vessel made of four flat glass panes was used for visualization. The heated surfaces in contact with the fluid differed in roughness were smooth or enhanced. This paper analyzes the effects of the microstructured heated surface on the heat transfer coefficient. The results are presented as relationships between the heat transfer coefficient and the heat flux and as boiling curves. The experimental data obtained for the two types of enhanced heated surfaces was compared with the results recorded for the smooth heated surface. The highest local values of the heat transfer coefficient were reported for the enhanced surfaces.

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Section: Introductionmentioning

confidence: 99%

“…Values of the local heat transfer coefficient have proved higher when results from the enhanced heating surfaces were noticed [2][3][4]. Enhanced heating surfaces were produced using various techniques, e.g.…”

Section: Introductionmentioning

confidence: 99%

Heat transfer research on enhanced heating surfaces in pool boiling

2017

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“…Research on pool boiling heat transfer with water, ethanol, FC-72 and Novec-649 from various structured surfaces [5,6] and boiling heat transfer with FC-72 flowing in narrow channels [7][8][9] has been conducted at the Kielce University of Technology for more a decade.…”

Section: Introductionmentioning

confidence: 99%

Effect of geometrical parameters of open microchannel surfaces on pool boiling heat transfer

2017

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Abstract. This study focuses on the effect of channel depth on the heat transfer coefficient during nucleate pool boiling. Experimental studies were performed for saturated deionized water, and Novec-649 as working fluids at atmospheric pressure. Copper surfaces were modified to form microchannels with different geometrical properties. The microchannels were from 0.2 mm to 0.4 mm deep, 0.3 mm wide and spaced every 0.1 mm. The experiment was conducted for increasing heat flux up to the critical heat flux point. The surface modification provided an appreciably higher heat transfer coefficient compared to the smooth surface for all boiling liquids. The maximum heat transfer coefficient obtained exceeded 60 kW/m 2 K.

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“…The Kielce University of technology has long been conducting visualization studies of boiling with water, ethanol, FC-72 and Novec -649 from various structured surfaces for both pool boiling and flow boiling [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Pool boiling visualization on open microchannel surfaces

Kaniowski

Pastuszko

2017

EPJ Web Conf.

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Abstract. The paper presents visualization investigations into pool boiling heat transfer for open minichannel surfaces. The experiments were carried out wih saturated water at atmospheric pressure. Parallel microchannels fabricated by machining were about 0.3 mm wide and 0.2 to 0.4 mm deep. Highspeed videos were used as an aid to understanding the heat transfer mechanism. The visualization study aimed at identifying nucleation sites of the departing bubbles and determining their diameters and frequency at various superheats.

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Correlations for flow boiling heat transfer in minichannels with various orientations

Cited by 51 publications

References 16 publications

Heat transfer research on enhanced heating surfaces in pool boiling

Heat transfer research on enhanced heating surfaces in pool boiling

Effect of geometrical parameters of open microchannel surfaces on pool boiling heat transfer

Pool boiling visualization on open microchannel surfaces

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