TY - JOUR

T1 - Heat Transfer during Downflow Condensation of R21 in Plate-Fin Heat Exchanger with Inclined Texture

AU - Kuznetsov, V. V.

AU - Shamirzaev, A. S.

N1 - The study was carried out at IT SB RAS within a grant from the Russian Science Foundation (project no. 21-19-00626).

PY - 2024/6

Y1 - 2024/6

N2 - Abstract: The paper presents an experimental study of the heat transfer during condensation of modeling freon R21 in downward flow conditions in an element of a plate-fin heat exchanger with inclined-texture perforated fins. The experiments were carried out for mass velocity of 20 to 50 kg/m2s and wall subcooling of 0.8 to 1.1 K with a heat exchanger with fin density of 850 fins per meter. The texture on the surface of the perforated fins of the heat exchanger was at angle of 45 degrees to the flow direction and made it possible to significantly enhance the heat transfer in comparison with plain fins. It has been found that the heat transfer coefficient depends on the vapor quality, and at a mass velocity of 20 kg/m2s, it exceeds the corresponding value at a velocity of 50 kg/m2s because of a thinner condensate film at the top of the texture.

AB - Abstract: The paper presents an experimental study of the heat transfer during condensation of modeling freon R21 in downward flow conditions in an element of a plate-fin heat exchanger with inclined-texture perforated fins. The experiments were carried out for mass velocity of 20 to 50 kg/m2s and wall subcooling of 0.8 to 1.1 K with a heat exchanger with fin density of 850 fins per meter. The texture on the surface of the perforated fins of the heat exchanger was at angle of 45 degrees to the flow direction and made it possible to significantly enhance the heat transfer in comparison with plain fins. It has been found that the heat transfer coefficient depends on the vapor quality, and at a mass velocity of 20 kg/m2s, it exceeds the corresponding value at a velocity of 50 kg/m2s because of a thinner condensate film at the top of the texture.

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85198825283&origin=inward&txGid=fd641af9a08d765a432529006bb00fff

UR - https://www.mendeley.com/catalogue/1ea158de-0551-31f8-a59f-f0441e61d665/

U2 - 10.1134/S1810232824020048

DO - 10.1134/S1810232824020048

M3 - Article

VL - 33

SP - 283

EP - 288

JO - Journal of Engineering Thermophysics

JF - Journal of Engineering Thermophysics

SN - 1810-2328

IS - 2

ER -