University of Illinois Urbana-Champaign

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Showing 31–60 of 118 items
Thumbnail for Fractionation of R-407C in Brazed Plate Evaporators at Low Mass Flux
Fractionation of R-407C in Brazed Plate Evaporators at Low Mass Flux
Tallitsch, D.A.; Hrnjak, P.S.

Thumbnail for Elements for the design of new generation of heat exchangers for transcritical CO2 heat pumps
Elements for the design of new generation of heat exchangers for transcritical CO2 heat pumps
Yin, J.M.; Bullard, C.W.; Hrnjak, P.S.

Thumbnail for Two-Phase Pressure Drop and Flow Regime of Refrigerants and Refrigerant-Oil Mixtures in Small Channels
Two-Phase Pressure Drop and Flow Regime of Refrigerants and Refrigerant-Oil Mixtures in Small Channels
Field, B.S.; Hrnjak, P.S.

Thumbnail for Adiabatic Developing Two-Phase Refrigerant Flow in Manifolds of Heat Exchangers
Adiabatic Developing Two-Phase Refrigerant Flow in Manifolds of Heat Exchangers
Fei, P.; Hrnjak, P.S.

Thumbnail for Charge Minimization of Microchannel Heat Exchangers
Charge Minimization of Microchannel Heat Exchangers
Traeger, K.M.; Hrnjak, P.S.

Thumbnail for Transient Tests of A/C System Performed on a Caravan 1994
Transient Tests of A/C System Performed on a Caravan 1994
Hrnjak, P.S.; Miller, N.R.; Rodarte, E.

Thumbnail for Pressure Drop Measurements in Microchannel Heat Exchanger
Pressure Drop Measurements in Microchannel Heat Exchanger
Yin, J.M.; Bullard, C.W.; Hrnjak, P.S.

Thumbnail for New Coolant for Indirect Refrigeration Based on Potassium Formate
New Coolant for Indirect Refrigeration Based on Potassium Formate
Mao, Y.; Terrell, Jr., W.J.; Reef, R.C.; Hrnjak, P.S.

Thumbnail for Void Fraction and Pressure Drop in Microchannels
Void Fraction and Pressure Drop in Microchannels
Payne, W.T.

Thumbnail for An Experimental Investigation of R134a Flow Distribution in Horizontal Microchannel Manifolds
An Experimental Investigation of R134a Flow Distribution in Horizontal Microchannel Manifolds
Zhang, Q.M.; Hrnjak, P.S.; Newell, T.A.

Thumbnail for Dynamic Modeling And Control of Single and Multi-Evaporator Subcritical Vapor Compression Systems
Dynamic Modeling And Control of Single and Multi-Evaporator Subcritical Vapor Compression Systems
Shah, R.; Alleyne, Andrew G.; Bullard, C.W.; Rasmussen, Bryan P.; Hrnjak, P.S.

Thumbnail for An Experimental Investigation of Pressure Drop and Heat Transfer in an In-Tube Condensation System of Pure Ammonia
An Experimental Investigation of Pressure Drop and Heat Transfer in an In-Tube Condensation System of Pure Ammonia
Vollrath, J.E.; Hrnjak, P.S.; Newell, T.A.

Thumbnail for A Sensor for Estimating the Liquid Mass Fraction of the Refrigerant Exiting an Evaporator
A Sensor for Estimating the Liquid Mass Fraction of the Refrigerant Exiting an Evaporator
Solberg, J.R.; Miller, N.R.; Hrnjak, P.S.

Thumbnail for Entrainment in Refrigerated Air Curtains
Entrainment in Refrigerated Air Curtains
Field, B.S.; Loth, E.; Hrnjak, P.S.

Thumbnail for Design Tool for Display Case Heat Exchanger Frosting and Defrosting
Design Tool for Display Case Heat Exchanger Frosting and Defrosting
Verma, P.; Bullard, C.W.; Hrnjak, P.S.

Thumbnail for An Experimental Investigation of Pressure Drop and Heat Transfer in an In-Tube Condensation System of Ammonia with and Without Miscible Oil in Smooth and Enhanced Tubes
An Experimental Investigation of Pressure Drop and Heat Transfer in an In-Tube Condensation System of Ammonia with and Without Miscible Oil in Smooth and Enhanced Tubes
Komandiwirya, H.B.; Hrnjak, P.S.; Newell, T.A.

Thumbnail for Exploratory Research on MEMS Technology for Air-Conditioning and Heat-Pumps
Exploratory Research on MEMS Technology for Air-Conditioning and Heat-Pumps
Shannon, Mark A.; Hrnjak, P.S.; Leicht, T.M.

Thumbnail for Prediction of Noise Generated by Expansion Devices Throttling Refrigerant
Prediction of Noise Generated by Expansion Devices Throttling Refrigerant
Singh, G.M.; Rodarte, E.; Miller, N.R.; Hrnjak, P.S.

Thumbnail for Investigation of Control Strategies for Reducing Mobile Air Conditioning Power Consumption
Investigation of Control Strategies for Reducing Mobile Air Conditioning Power Consumption
Dane, M.H.; Miller, N.R.; Alleyne, Andrew G.; Bullard, C.W.; Hrnjak, P.S.

Thumbnail for Pressure Drop and Void Fraction in Microchannels Using Carbon Dioxide, Ammonia, and R245fa as Refrigerants
Pressure Drop and Void Fraction in Microchannels Using Carbon Dioxide, Ammonia, and R245fa as Refrigerants
Adams, D.C.; Hrnjak, P.S.; Newell, T.A.

Thumbnail for Characterization of Two-Phase Flow in Microchannels
Characterization of Two-Phase Flow in Microchannels
Nino, V.G.; Hrnjak, P.S.; Newell, T.A.

Thumbnail for Condensation of CO2 at Low Temperature inside Horizontal Microfinned Tubes
Condensation of CO2 at Low Temperature inside Horizontal Microfinned Tubes
Zilly, J.; Jang, J.; Hrnjak, P.S.

Thumbnail for Effect of Shorter Compressor On/Off Cycle Times on A/C System Performance
Effect of Shorter Compressor On/Off Cycle Times on A/C System Performance
Ilic, S.M.; Bullard, C.W.; Hrnjak, P.S.

Thumbnail for Flow-Regime Based Model for Pressure Drop Predictions in Microchannels
Flow-Regime Based Model for Pressure Drop Predictions in Microchannels
Nino, V.G.; Jassim, E.W.; Hrnjak, P.S.; Newell, T.A.

Thumbnail for Modification of a Standard Aeroacoustic Valve Noise Model to Account for Friction and Two-Phase Flow
Modification of a Standard Aeroacoustic Valve Noise Model to Account for Friction and Two-Phase Flow
Singh, G.M.; Rodarte, E.; Miller, N.R.; Hrnjak, P.S.

Thumbnail for Large Eddy Simulations of Particle Dispersion and Deposition in a Turbulent Square Duct Flow
Large Eddy Simulations of Particle Dispersion and Deposition in a Turbulent Square Duct Flow
Winkler, C.M.; Vanka, S.P.; Hrnjak, P.S.

Thumbnail for An Analytical and Empirical Study of Frost Accumulation Effects on Louvered-Fin, Microchannel Heat Exchangers
An Analytical and Empirical Study of Frost Accumulation Effects on Louvered-Fin, Microchannel Heat Exchangers
Xia, Y.; Hrnjak, P.S.; Jacobi, A.M.

Thumbnail for Single Phase, Two-Phase Modeling; X-Ray Visualization for a Microchannel Manifold Distribution System
Single Phase, Two-Phase Modeling; X-Ray Visualization for a Microchannel Manifold Distribution System
Thompkins, D.M.; Newell, T.A.; Hrnjak, P.S.

Thumbnail for Superheat Stability of an Evaporator and Thermostatic Expansion Valve
Superheat Stability of an Evaporator and Thermostatic Expansion Valve
Lenger, M.J.; Jacobi, A.M.; Hrnjak, P.S.

Thumbnail for Measurement of the Relationship Between Oil Circulation and Compressor Lubrication in a Mobile AlC System: Part Two
Measurement of the Relationship Between Oil Circulation and Compressor Lubrication in a Mobile AlC System: Part Two
Chappell, J.D.; Drozdek, J.C.; Cusano, C.; Hrnjak, P.S.; Miller, N.R.; Newell, T.A.