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Proc. ASME. FEDSM2018, Volume 3: Fluid Machinery; Erosion, Slurry, Sedimentation; Experimental, Multiscale, and Numerical Methods for Multiphase Flows; Gas-Liquid, Gas-Solid, and Liquid-Solid Flows; Performance of Multiphase Flow Systems; Micro/Nano-Fluidics, V003T20A003, July 15–20, 2018

Paper No: FEDSM2018-83311

DOI: https://doi.org/10.1115/FEDSM2018-83311

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Topics: Condensers (steam plant), Microchannels, Phase separation, Vapors, Separation (Technology), Compression, Design, Drops, Energy conversion, Engineering prototypes

Proceedings Papers

Effect of Inclination on Heat Transfer in Large Flattened-Tube Steam Condensers

William A. Davies, Yu Kang, Pega Hrnjak, Anthony M. Jacobi

Proc. ASME. IMECE2017, Volume 6: Energy, V006T08A035, November 3–9, 2017

Paper No: IMECE2017-70332

DOI: https://doi.org/10.1115/IMECE2017-70332

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Topics: Condensers (steam plant), Heat transfer, Steam, Visualization, Aluminum, Condensation, Drainage, Fins, Porosity, Power stations

Proceedings Papers

Oil Effects on In-Tube Evaporation of CO 2 by Altering Flow Regime and Properties

Pega Hrnjak, Seongho Kim

Proc. ASME. HT2013, Volume 2: Heat Transfer Enhancement for Practical Applications; Heat and Mass Transfer in Fire and Combustion; Heat Transfer in Multiphase Systems; Heat and Mass Transfer in Biotechnology, V002T04A012, July 14–19, 2013

Paper No: HT2013-17838

DOI: https://doi.org/10.1115/HT2013-17838

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Topics: Carbon dioxide, Evaporation, Flow (Dynamics), Heat transfer, Boiling, Flux (Metallurgy), Heat transfer coefficients, Vapors, Visualization, Heat

Proceedings Papers

A Mechanistic Model of Two-Phase Pressure Drop in Microchannels

Brandon S. Field, Pega Hrnjak

Proc. ASME. IMECE2011, Volume 6: Fluids and Thermal Systems; Advances for Process Industries, Parts A and B, 411-419, November 11–17, 2011

Paper No: IMECE2011-64269

DOI: https://doi.org/10.1115/IMECE2011-64269

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Topics: Microchannels, Pressure drop, Flow (Dynamics), Microchannel flow, Fluids, Refrigerants, Bubbly flow, Slug flows, Surface tension, Two-phase flow

Journal Articles

Flow Boiling Heat Transfer, Pressure Drop, and Flow Pattern for C O 2 in a 3.5 mm Horizontal Smooth Tube

Chang Yong Park, Pega Hrnjak

J. Heat Transfer. September 2009, 131(9): 091501.

DOI: https://doi.org/10.1115/1.2909079

Published Online: June 19, 2009

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Topics: Boiling, Flow (Dynamics), Heat transfer, Heat transfer coefficients, Pressure drop, Temperature, Carbon dioxide

Proceedings Papers

Visualization of Two-Phase Refrigerant and Refrigerant-Oil Flow in a Microchannel

Brandon S. Field, Pega Hrnjak

Proc. ASME. IMECE2007, Volume 8: Heat Transfer, Fluid Flows, and Thermal Systems, Parts A and B, 1647-1656, November 11–15, 2007

Paper No: IMECE2007-43471

DOI: https://doi.org/10.1115/IMECE2007-43471

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Topics: Flow (Dynamics), Microchannels, Refrigerants, Visualization, Fluids, Slug flows, Temperature, Vapors, Bubbles, Flow visualization

Proceedings Papers

Developing Adiabatic Two Phase Flow in Headers

Pega Hrnjak

Proc. ASME. ICMM2003, 1st International Conference on Microchannels and Minichannels, 207-214, April 24–25, 2003

Paper No: ICMM2003-1022

DOI: https://doi.org/10.1115/ICMM2003-1022

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Topics: Fluids, Heat exchangers, Microchannels, Two-phase flow

Proceedings Papers

Experimental Investigation of Single-Phase Flow Pressure Drop Through Rectangular Microchannels

Xiao Tu, Pega Hrnjak

Proc. ASME. ICMM2003, 1st International Conference on Microchannels and Minichannels, 257-267, April 24–25, 2003

Paper No: ICMM2003-1028

DOI: https://doi.org/10.1115/ICMM2003-1028

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Topics: Flow (Dynamics), Microchannels, Pressure drop, Friction, Reynolds number, Surface roughness, Fluids, Testing, Turbulence, Vapors

Proceedings Papers

Adiabatic Two-Phase Pressure Drop of Refrigerants in Small Channels

Brandon S. Field, Pega Hrnjak

Proc. ASME. ICNMM2006, ASME 4th International Conference on Nanochannels, Microchannels, and Minichannels, Parts A and B, 1173-1180, June 19–21, 2006

Paper No: ICNMM2006-96200

DOI: https://doi.org/10.1115/ICNMM2006-96200

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Topics: Pressure drop, Refrigerants, Flow (Dynamics), Surface tension, Fluids, Kinetic energy, Reynolds number, Vapors

Journal citation

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Supplemental Material

Effect of Comfort Constraints on Cycle Efficiencies

Heat Transfer Coefficient, Pressure Gradient, and Flow Patterns of R1234yf Evaporating in Microchannel Tube

Phase Separation in Vertical Header of Microchannel Condensers—A Mechanistic Model

Parametric Study and Improvement of Phase Separation in Intermediate Headers of Microchannel Condensers

Parametric Study and Improvement of Phase Separation in Intermediate Headers of Microchannel Condensers

Phase Separation in Vertical Header of Microchannel Condensers: A Mechanistic Model

Effect of Inclination on Heat Transfer in Large Flattened-Tube Steam Condensers

Oil Effects on In-Tube Evaporation of CO 2 by Altering Flow Regime and Properties

A Mechanistic Model of Two-Phase Pressure Drop in Microchannels

Flow Boiling Heat Transfer, Pressure Drop, and Flow Pattern for C O 2 in a 3.5 mm Horizontal Smooth Tube

Visualization of Two-Phase Refrigerant and Refrigerant-Oil Flow in a Microchannel

Developing Adiabatic Two Phase Flow in Headers

Experimental Investigation of Single-Phase Flow Pressure Drop Through Rectangular Microchannels

Adiabatic Two-Phase Pressure Drop of Refrigerants in Small Channels

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