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The industrial conversion to new alternative refrigerants is now one of the major driving forces in two-phase flow and boiling heat transfer research. A state-of- the-art review is presented here to quantify what has been done so far, assess the strengths ...
The substitution of old refrigerants in refrigeration systems, heat pumps and organic Rankine cycles for heat recovery, request a good knowledge of heat transfer properties of substitute fluids. The test measurmements in LENI test facility (concentric tube ...
Flow boiling experiments for two new non-azeotropic, three-component refrigerant mixtures (HP80 and HP62) and R-502 have been carried out inside a 12 mm bore, horizontal tube. Local boiling coefficients for HP62 are slightly larger that those for R-502 und ...
Recent advances in refrigerant-oil flow boiling research are reviewed together with identification of the important trends in published experimental data, while shortcomings in data reduction methods used in most of these previous tests are also noted. New ...
Intube flow boiling experiments for two new zeotropic refrigerant mixtures and R-502 have been carried out at three saturation temperatures over a wide range of local vapor qualities. The zeotropic mixtures tested were HP80 and HP62. Local flow boiling coe ...
Flow pattern data for horizontal intube flow boiling are presented for refrigerants R-134a and R-402 (60/2/38). The flow pattern observations were compared with various criteria for determining whether the entire circumference of a horizontal evaporator tu ...
A critical review of evaporation in plain, horizontal tubes is presented, focusing primarly on flow boiling correlations. Emphasis is placed on analyzing the integrity of currently accepted ideas and methods, identifying the weaknesses in current design me ...
