Pega Hrnjak

Experimental validation of a prototype ejector designed to reduce throttling losses encountered in transcritical R744 system operation

Stefan Elbel, Pega Hrnjak · International Journal of Refrigeration · 2007 · 429 citations

Engineering, Experimental Validation, Aerospace Engineering +5

Frost, defrost, and refrost and its impact on the air-side thermal-hydraulic performance of louvered-fin, flat-tube heat exchangers

Yong Xia, Yi Chen Zhong, Pega Hrnjak et al. · International Journal of Refrigeration · 2006 · 141 citations

Engineering, Heat Exchanger, Heat Transfer Enhancement +7

CO2 and R410A flow boiling heat transfer, pressure drop, and flow pattern at low temperatures in a horizontal smooth tube

C.Y. Park, Pega Hrnjak · International Journal of Refrigeration · 2006 · 125 citations

Heat Transfer Process, Low Temperatures, Engineering +10

CO2 flow condensation heat transfer and pressure drop in multi-port microchannels at low temperatures

Chang Yong Park, Pega Hrnjak · International Journal of Refrigeration · 2009 · 112 citations

Heat Transfer Process, Low Temperatures, Engineering +9

Characteristics of two-phase flow pattern transitions and pressure drop of five refrigerants in horizontal circular small tubes

Agus Sunjarianto Pamitran, Kwang‐Il Choi, Jong-Taek Oh et al. · International Journal of Refrigeration · 2010 · 106 citations

Engineering, Fluid Mechanics, Multiphase Flow +4