Predrag Stojan Hrnjak

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2020

Étalonnage basé sur la mesure de masse d'un capteur capacitif pour mesurer la fraction de vide pour le R134a dans des tubes lisses

Translated title of the contribution: Mass measurement based calibration of a capacitive sensor to measure void fraction for R134a in smooth tubesQian, H. & Hrnjak, P., Feb 2020, In : International Journal of Refrigeration. 110, p. 168-177 10 p.

Research output: Contribution to journalArticle

Nouvelle cartographie de la configuration d'écoulement pour l'ébullition de R410A en écoulement dans des tubes horizontaux à micro-ailettes tenant compte de l'effet de l'angle d'hélice

Translated title of the contribution: A new flow pattern map for flow boiling of R410A in horizontal micro-fin tubes considering the effect of the helix angleYang, C. M. & Hrnjak, P., Jan 2020, In : International Journal of Refrigeration. 109, p. 154-160 7 p.

Research output: Contribution to journalArticle

Pressure drop and heat transfer of flow boiling R134a in a dimpled flat duct

Tang, K., Gao, Y., Feng, Y. & Hrnjak, P., Apr 2020, In : International Journal of Heat and Mass Transfer. 151, 119398.

Research output: Contribution to journalArticle

2019

Caractéristiques de l’écoulement du brouillard annulaire d'huile dans la canalisation de refoulement du compresseur

Translated title of the contribution: Characteristics of oil annular-mist flow in the compressor discharge pipeXu, J. & Hrnjak, P. S., Nov 2019, In : International Journal of Refrigeration. 107, p. 145-154 10 p.

Research output: Contribution to journalArticle

Effect of inclination on heat transfer and flow regimes in large flattened-tube steam condensers

Davies, W. A., Kang, Y., Hrnjak, P. & Jacobi, A. M., Feb 5 2019, In : Applied Thermal Engineering. 148, p. 999-1006 8 p.

Research output: Contribution to journalArticle

Effects of Airflow Profile and Condensation Pressure on Performance of Air-Cooled Condensers

Davies, W. A. & Hrnjak, P., Jan 1 2019, (Accepted/In press) In : Heat Transfer Engineering.

Research output: Contribution to journalArticle

Flow patterns and plug/slug flow characteristic of R134a in a 0.643 mm microchannel tube

Li, H. & Hrnjak, P., Apr 2019, In : International Journal of Heat and Mass Transfer. 132, p. 1062-1073 12 p.

Research output: Contribution to journalArticle

Flow regimes during condensation from superheated vapor

Xiao, J. & Hrnjak, P., Apr 2019, In : International Journal of Heat and Mass Transfer. 132, p. 301-308 8 p.

Research output: Contribution to journalArticle

Flow visualization of R1234ze(E) in a 0.643 mm microchannel tube

Li, H. & Hrnjak, P., Jun 2019, In : International Journal of Heat and Mass Transfer. 136, p. 950-961 12 p.

Research output: Contribution to journalArticle

Flow visualization of R32 in parallel-port microchannel tube

Li, H. & Hrnjak, P., Jan 2019, In : International Journal of Heat and Mass Transfer. 128, p. 1-11 11 p.

Research output: Contribution to journalArticle

Heat transfer and flow regimes in large flattened-tube steam condensers

Davies, W. A., Kang, Y., Hrnjak, P. & Jacobi, A. M., Feb 5 2019, In : Applied Thermal Engineering. 148, p. 722-733 12 p.

Research output: Contribution to journalArticle

Heat Transfer in a Large, Inclined, Flattened-Tube Steam Condenser

Davies, W. A. & Hrnjak, P., Jan 1 2019, (Accepted/In press) In : Heat Transfer Engineering. 41, 17, p. 1443-1456 14 p.

Research output: Contribution to journalArticle

Mesurage de la fraction de vide et visualisation des régimes d’écoulement de R134a dans des tubes circulaires horizontaux et verticaux d'un diamètre intérieur de 7mm

Translated title of the contribution: Void fraction measurement and flow regimes visualization of R134a in horizontal and vertical ID 7 mm circular tubesQian, H. & Hrnjak, P., Jul 2019, In : International Journal of Refrigeration. 103, p. 191-203 13 p.

Research output: Contribution to journalArticle

Numerical study of steam condensation inside a long inclined flattened channel

Abadi, S. M. A. N. R., Davies, W. A., Hrnjak, P. S. & Meyer, J. P., May 2019, In : International Journal of Heat and Mass Transfer. 134, p. 450-467 18 p.

Research output: Contribution to journalArticle

Séparateur d'huile par coalescence pour compresseurs

Translated title of the contribution: Coalescing oil separator for compressorsXu, J. & Hrnjak, P., Oct 2019, In : International Journal of Refrigeration. 106, p. 41-53 13 p.

Research output: Contribution to journalArticle

Thermo-hydraulic model for steam condensation in a large, inclined, flattened-tube air-cooled condenser

Davies, W. A. & Hrnjak, P., Feb 25 2019, In : Applied Thermal Engineering. 149, p. 745-756 12 p.

Research output: Contribution to journalArticle

Visualization of two-phase flow of R410A in horizontal smooth and axial micro-finned tubes

Yang, C. M. & Hrnjak, P., Aug 2019, In : International Journal of Heat and Mass Transfer. 138, p. 49-58 10 p.

Research output: Contribution to journalArticle

2018

A pressure drop model for condensation accounting for non-equilibrium effects

Xiao, J. & Hrnjak, P., Nov 2018, In : International Journal of Heat and Mass Transfer. 126, p. 421-430 10 p.

Research output: Contribution to journalArticle

Effect of refrigerant thermophysical properties on flow reversal in microchannel evaporators

Li, H. & Hrnjak, P., Feb 2018, In : International Journal of Heat and Mass Transfer. 117, p. 1135-1146 12 p.

Research output: Contribution to journalArticle

Formation, distribution et circulation des gouttelettes d'huile dans le plénum de compresseur

Translated title of the contribution: Formation, distribution, and movement of oil droplets in the compressor plenumXu, J. & Hrnjak, P., Sep 2018, In : International Journal of Refrigeration. 93, p. 184-194 11 p.

Research output: Contribution to journalArticle

Heat flux variation between neighboring channels in compact minichannel heat exchangers

Khovalyg, D., Hrnjak, P. S. & Jacobi, A. M., May 5 2018, In : Applied Thermal Engineering. 135, p. 418-434 17 p.

Research output: Contribution to journalArticle

Modéle validé expérimentalement d'un chauffe-eau à pompe à chaleur avec un réservoir d'eau lors du chauffage transitoire

Translated title of the contribution: Experimentally validated model of heat pump water heater with a water tank in heating-up transientsLi, W. & Hrnjak, P., Apr 2018, In : International Journal of Refrigeration. 88, p. 420-431 12 p.

Research output: Contribution to journalArticle

Visualisation et quantification de la séparation de l’écoulement diphasique liquide-vapeur dans un collecteur vertical à faible qualité d'entrée

Translated title of the contribution: Visualization and quantification of separation of liquid-vapor two-phase flow in a vertical header at low inlet qualityLi, J. & Hrnjak, P., Jan 2018, In : International Journal of Refrigeration. 85, p. 144-156 13 p.

Research output: Contribution to journalArticle

2017

A heat transfer model for condensation accounting for non-equilibrium effects

Xiao, J. & Hrnjak, P., Jan 1 2017, In : International Journal of Heat and Mass Transfer. 111, p. 201-210 10 p.

Research output: Contribution to journalArticle

Amélioration de la performance d'un condenseur par séparation de phase confirmée par étude expérimentale et par modélisation

Translated title of the contribution: Improvement of condenser performance by phase separation confirmed experimentally and by modelingLi, J. & Hrnjak, P. S., Jun 1 2017, In : International Journal of Refrigeration. 78, p. 60-69 10 p.

Research output: Contribution to journalArticle

A new flow regime map and void fraction model based on the flow characterization of condensation

Xiao, J. & Hrnjak, P., Jan 1 2017, In : International Journal of Heat and Mass Transfer. 108, p. 443-452 10 p.

Research output: Contribution to journalArticle

Effect of channel geometry on flow reversal in microchannel evaporators

Li, H. & Hrnjak, P., Jan 1 2017, In : International Journal of Heat and Mass Transfer. 115, p. 1-10 10 p.

Research output: Contribution to journalArticle

Effect of end plates on heat transfer of plate heat exchanger

Jin, S. & Hrnjak, P., 2017, In : International Journal of Heat and Mass Transfer. 108, p. 740-748 9 p.

Research output: Contribution to journalArticle

Effect of inclination on pressure drop and flow regimes in large flattened-tube steam condensers

Kang, Y., Davies, W. A., Hrnjak, P. & Jacobi, A. M., Jan 1 2017, In : Applied Thermal Engineering. 123, p. 498-513 16 p.

Research output: Contribution to journalArticle

Effet de l'angle des persiennes sur la performance d'un échangeur de chaleur avec ailettes à serpentins et tubes plats en situation de givrage - importance des expériences sous condition de givrage périodique

Translated title of the contribution: Effect of louver angle on performance of heat exchanger with serpentine fins and flat tubes in frosting: Importance of experiments in periodic frostingHrnjak, P., Zhang, P. & Rennels, C., Dec 2017, In : International Journal of Refrigeration. 84, p. 321-335 15 p.

Research output: Contribution to journalArticle

Effet de l'écoulement inversé périodique sur la performance du transfert de chaleur des évaporateurs à microcanaux

Translated title of the contribution: Effect of periodic reverse flow on the heat transfer performance of microchannel evaporatorsLi, H. & Hrnjak, P., Dec 2017, In : International Journal of Refrigeration. 84, p. 309-320 12 p.

Research output: Contribution to journalArticle

La séparation dans les condenseurs pour une efficacité accrue

Translated title of the contribution: Separation in condensers as a way to improve efficiencyLi, J. & Hrnjak, P., Jul 1 2017, In : International Journal of Refrigeration. 79, p. 1-9 9 p.

Research output: Contribution to journalArticle

Modeling of bubble dynamics in single diabatic microchannel

Li, H. & Hrnjak, P., Apr 1 2017, In : International Journal of Heat and Mass Transfer. 107, p. 96-104 9 p.

Research output: Contribution to journalArticle

Quantification de l'écoulement et de la rétention d'huile dans le tuyau de refoulement d'un compresseur

Translated title of the contribution: Quantification of flow and retention of oil in compressor discharge pipeXu, J. & Hrnjak, P., Aug 2017, In : International Journal of Refrigeration. 80, p. 252-263 12 p.

Research output: Contribution to journalArticle