TY - JOUR

T1 - Heat transfer coefficient and pressure drop during refrigerant R-134a condensation in a plate heat exchanger

AU - Djordjevic, Emila M.

AU - Kabelac, Stephan

AU - Šerbanović, Slobodan P.

N1 - Funding Information: Acknowledgements. Experimental investigation presented in this study was conducted in the Laboratory of the Institute of Thermodynamics at Helmut Schmidt University of Federal Armed Forces in Hamburg, Germany. The setup was partially supported by GEA Ecoflex GmbH, Sarstedt, Germany. The research visit of the first author in Hamburg was financed by the German Academic Exchange Bureau DAAD. Results reported in this study are also a part of the scientific project financed by the Serbian Ministry of Science. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2008/2

Y1 - 2008/2

N2 - The condensation heat transfer coefficient and the two-phase pressure drop of refrigerant R-134a in a vertical plate heat exchanger were investigated experimentally. The area of the plate was divided into several segments along the vertical axis. For each of the segments, local values of the heat transfer coefficient and frictional pressure drop were calculated and presented as a function of the mean vapor quality in the segment. Owing to the thermocouples installed along the plate surface, it was possible to determine the temperature distribution and vapor quality profile inside the plate. The influences of the mass flux and the heat flux on the heat transfer coefficient and the pressure drop were also taken into account and a comparison with previously published experimental data and literature correlations was carried out.

AB - The condensation heat transfer coefficient and the two-phase pressure drop of refrigerant R-134a in a vertical plate heat exchanger were investigated experimentally. The area of the plate was divided into several segments along the vertical axis. For each of the segments, local values of the heat transfer coefficient and frictional pressure drop were calculated and presented as a function of the mean vapor quality in the segment. Owing to the thermocouples installed along the plate surface, it was possible to determine the temperature distribution and vapor quality profile inside the plate. The influences of the mass flux and the heat flux on the heat transfer coefficient and the pressure drop were also taken into account and a comparison with previously published experimental data and literature correlations was carried out.

KW - Condensation

KW - Heat transfer coefficient

KW - Plate heat exchanger

KW - Pressure drop

KW - R-134a

UR - http://www.scopus.com/inward/record.url?scp=36849082991&partnerID=8YFLogxK

U2 - 10.2478/s11696-007-0082-8

DO - 10.2478/s11696-007-0082-8

M3 - Article

AN - SCOPUS:36849082991

VL - 62

SP - 78

EP - 85

JO - Chemical Papers

JF - Chemical Papers

SN - 0366-6352

IS - 1

ER -