An experimental study of flow boiling in minichannels at high reduced pressure

Belyaev, Aleksandr V.; Varava, A. N.; Дедов, А. В.; Komov, A. T.

doi:10.1016/j.ijheatmasstransfer.2017.03.045

Cited by 21 publications

(12 citation statements)

References 20 publications

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“…At channel size reduction, a wide variety of phenomena arise which are not typical for conventional tubes. That confirmed by experimental data from [2][3][4][5][6] and other papers. In despite of a large number of published methods for predicting heat transfer in microchannels, the application of these methods requires verification, and the determination of heat transfer for various heat transfer modes during flow boiling in microchannels remains actual [7].…”

Section: Introductionsupporting

confidence: 82%

An experimental investigation of flow boiling heat transfer for water and refrigerants in microchannel heat exchangers

Shamirzaev¹,

Mordovskoy²,

Kuznetsov³

2018

AIP Conference Proceedings

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Section: Introductionsupporting

confidence: 82%

An experimental investigation of flow boiling heat transfer for water and refrigerants in microchannel heat exchangers

Shamirzaev¹,

Mordovskoy²,

Kuznetsov³

2018

AIP Conference Proceedings

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“…indicates the fact that collected for scrutiny experimental research covers a full range of quality and a relatively wide range of mass velocity. Belyaev et al [49] tried to confirm the hypothesis that in case of high value of reduced pressure, the two-phase flow structures in small diameter channels are similar to those occurring in conventional size diameter. Based on their [49] study they observed that when reduced pressure is greater than 0.4 then is no differences between heat transfer during flow boiling in minichannels and conventional channels.…”

Section: Resultsmentioning

confidence: 98%

“…Belyaev et al [49] tried to confirm the hypothesis that in case of high value of reduced pressure, the two-phase flow structures in small diameter channels are similar to those occurring in conventional size diameter. Based on their [49] study they observed that when reduced pressure is greater than 0.4 then is no differences between heat transfer during flow boiling in minichannels and conventional channels. Figures 1 to 4 show the results of calculations of heat transfer coefficient for all data bank obtained using the described earlier flow boiling model described by Eq.…”

Section: Resultsmentioning

confidence: 98%

Comparison of predictive methods for flow boiling heat transfer in conventional channels and minichannels – the effect of reduced pressure

Mikielewicz

Jakubowska

2018

MATEC Web Conf.

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In the paper are presented the results of follow on studies from [1]–[3] using authors own model to predict heat transfer coefficient during flow boiling. The model has been tested against a large selection of experimental data collected from various researchers to investigate the sensitivity of the in-house developed model. The collected experimental data came from various studies from literature and were conducted for the full range of quality variation and a wide range of mass velocity and saturation temperatures. In the work are presented the results of calculations obtained using the in-house developed semi empirical model on selected experimental flow boiling data of the refrigerants: R134a, R1234yf, R600a, R290, NH3, CO2, R236fa, R245fa, R152a and HFE7000. In the present study the particular attention was focused on the influence of reduced pressure on the predictions of the theoretical model. The results of calculations were to test the sensitivity of the flow boiling model with respect to selection of the appropriate two-phase flow multiplier, which is one of the distinctive elements of the in-house model. The main purpose of this paper however is to show the effect of the reduced pressure on the predictions of heat transfer during flow boiling.

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“…Using the Kew and Cornwell [50] criterion, the available data bank was divided into conventional size channels and mini-channels and when the confinement number is greater than 0.5 then the flow corresponds to the flow in the mini-channel. Belyaev et al [51] tried to confirm the hypothesis that in the case of high value of reduced pressure, the two-phase flow structures in small diameter channels are similar to those occurring in conventional size diameter. Based on their study they observed that when reduced pressure is greater than 0.4 then is no differences between heat transfer during flow boiling in minichannels and conventional channels.…”

Section: Resultsmentioning

confidence: 99%

An improved method for flow boiling heat transfer with account of the reduced pressure effect

Jakubowska

Mikielewicz

2019

Therm sci

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Original scientific paper https://doi.org/10.2298/TSCI19S4261JIn the paper are presented the results using the authors own model to predict heat transfer coefficient during flow boiling. The model has been tested against a large selection of experimental data to investigate the sensitivity of the in-house developed model. In the work are presented the results of calculations obtained using the semi-empirical model on selected experimental flow boiling data of the refrigerants: R134a, R1234yf, R600a, R290, NH 3 , CO 2 , R236fa, R245fa, R152a, and HFE7000. In the present study, particular attention was focused on the influence of reduced pressure on the predictions of the theoretical model. The main purpose of this paper is to show the effect of the reduced pressure on the predictions of heat transfer during flow boiling.

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An experimental study of flow boiling in minichannels at high reduced pressure

Cited by 21 publications

References 20 publications

An experimental investigation of flow boiling heat transfer for water and refrigerants in microchannel heat exchangers

An experimental investigation of flow boiling heat transfer for water and refrigerants in microchannel heat exchangers

Comparison of predictive methods for flow boiling heat transfer in conventional channels and minichannels – the effect of reduced pressure

An improved method for flow boiling heat transfer with account of the reduced pressure effect

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