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Predrag Stojan Hrnjak

19982020
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Research Output 1998 2020

A correlation for heat transfer coefficient during stratified steam condensation in large flattened tubes with variable inclination and wall temperature

Davies, W. A. & Hrnjak, P., Jan 2020, In : International Journal of Heat and Mass Transfer. 146, 118666.

Research output: Contribution to journal › Article

wall temperature
Steam
heat transfer coefficients
steam
Heat transfer coefficients

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 journal › Article

Capacitive sensors
Void fraction
Calibration
Sensors
Mass transfer

Local heat transfer coefficient during stratified flow in large, flattened-tube steam condensers with non-uniform heat flux and wall temperature

Davies, W. A. & Hrnjak, P., Jan 2020, In : International Journal of Heat and Mass Transfer. 146, 118854.

Research output: Contribution to journal › Article

Condenser tubes
stratified flow
wall temperature
condensers
heat transfer coefficients

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 journal › Article

Flow patterns
Boiling liquids
Mass transfer
Visualization
Vapors

A flow regime map for condensation in macro and micro tubes with non-equilibrium effects taken into account

Xiao, J. & Hrnjak, P. S., Mar 2019, In : International Journal of Heat and Mass Transfer. 130, p. 893-900 8 p.

Research output: Contribution to journal › Article

Macros
Condensation
condensation
tubes
Visualization