Boiling Heat Transfer with Freon R-21 in Vertical Downflow for Assembly of Minichannels with Inclined Texture

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Boiling Heat Transfer with Freon R-21 in Vertical Downflow for Assembly of Minichannels with Inclined Texture. / Kuznetsov, V. V.; Shamirzaev, A. S.

In: Journal of Engineering Thermophysics, Vol. 32, No. 3, 09.2023, p. 455-461.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{27da8a47d26545f886a2ff7f88099f88,

title = "Boiling Heat Transfer with Freon R-21 in Vertical Downflow for Assembly of Minichannels with Inclined Texture",

abstract = "The heat transfer during boiling of freon R-21 in vertical downflow for an element of a plate-fin heat exchanger with textured and perforated fins was studied experimentally. The experiments were carried out for mass velocities of 30 to 60 kg/m2s and heat fluxes of 900 to 1900 W/m2 for a heat exchanger with 850 fins per meter. The heat exchanger fin texture at an angle of 45 degrees to the flow direction of the vapor-liquid mixture made it possible to intensify the heat transfer and suppress the deterioration of the heat transfer at a vapor quality exceeding 0.8 in comparison with perforated fins. It has been found that the heat transfer coefficient is practically independent of the heat flux density and mass velocity, which shows the decisive influence of evaporation on the liquid film surface on the heat transfer under these conditions.",

author = "Kuznetsov, {V. V.} and Shamirzaev, {A. S.}",

note = "The study was carried out at the IT SB RAS, financed by a Russian Science Foundation grant (project no. 21-19-00626). Публикация для корректировки.",

year = "2023",

month = sep,

doi = "10.1134/S1810232823030037",

language = "English",

volume = "32",

pages = "455--461",

journal = "Journal of Engineering Thermophysics",

issn = "1810-2328",

publisher = "Maik Nauka-Interperiodica Publishing",

number = "3",

}

RIS

TY - JOUR

T1 - Boiling Heat Transfer with Freon R-21 in Vertical Downflow for Assembly of Minichannels with Inclined Texture

AU - Kuznetsov, V. V.

AU - Shamirzaev, A. S.

N1 - The study was carried out at the IT SB RAS, financed by a Russian Science Foundation grant (project no. 21-19-00626). Публикация для корректировки.

PY - 2023/9

Y1 - 2023/9

N2 - The heat transfer during boiling of freon R-21 in vertical downflow for an element of a plate-fin heat exchanger with textured and perforated fins was studied experimentally. The experiments were carried out for mass velocities of 30 to 60 kg/m2s and heat fluxes of 900 to 1900 W/m2 for a heat exchanger with 850 fins per meter. The heat exchanger fin texture at an angle of 45 degrees to the flow direction of the vapor-liquid mixture made it possible to intensify the heat transfer and suppress the deterioration of the heat transfer at a vapor quality exceeding 0.8 in comparison with perforated fins. It has been found that the heat transfer coefficient is practically independent of the heat flux density and mass velocity, which shows the decisive influence of evaporation on the liquid film surface on the heat transfer under these conditions.

AB - The heat transfer during boiling of freon R-21 in vertical downflow for an element of a plate-fin heat exchanger with textured and perforated fins was studied experimentally. The experiments were carried out for mass velocities of 30 to 60 kg/m2s and heat fluxes of 900 to 1900 W/m2 for a heat exchanger with 850 fins per meter. The heat exchanger fin texture at an angle of 45 degrees to the flow direction of the vapor-liquid mixture made it possible to intensify the heat transfer and suppress the deterioration of the heat transfer at a vapor quality exceeding 0.8 in comparison with perforated fins. It has been found that the heat transfer coefficient is practically independent of the heat flux density and mass velocity, which shows the decisive influence of evaporation on the liquid film surface on the heat transfer under these conditions.

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85176004863&origin=inward&txGid=a09bd875850514b2d2c02710403cba67

UR - https://www.mendeley.com/catalogue/2a63ea80-eb4c-36bc-a8e4-23002264c9be/

U2 - 10.1134/S1810232823030037

DO - 10.1134/S1810232823030037

M3 - Article

VL - 32

SP - 455

EP - 461

JO - Journal of Engineering Thermophysics

JF - Journal of Engineering Thermophysics

SN - 1810-2328

IS - 3

ER -

ID: 59549960