Flow Boiling Heat Transfer of Kerosene Inside Ribbed Tube

Results of a study on flow boiling heat transfer enhancement of kerosene with ribbed tube (rib pitch 9 mm, rib height 0.4 ∼ 0.6 mm, rib width 3.9 mm) are reported. Experiments of upward flow boiling heat transfer in smooth tube and ribbed tube at a pressure 2 bar were performed for a range of heat flux (28.5 ∼ 93.75 kW/m²), mass flux (410 ∼ 810 kg/m² s) and equilibrium mass quality (0 ∼ 0.3) respectively. Heat transfer coefficients in the ribbed tube are improved by a factor of 1.4 ∼ 1.6 as compared with the smooth tube. A correlation of flow boiling heat transfer coefficients is proposed for the enhanced ribbed tube. Phenomenon and mechanism of flow boiling heat transfer with kerosene are discussed.