To meet the need of modifying the boiling equipment used in petrol chemical industry

flow boiling heat transfer experiments with kerosene in smooth tube and internally ribbed tube are conducted respectively under the condition of 3×10 5 Pa(absolute atmosphere pressure). The experimental results are compared with each other. It shows that the flow boiling heat transfer coefficients in the internally ribbed tube are 1 6—2 times that in the smooth tube and flow boiling heat transfer under the condition of smaller temperature difference can be achieved in the internally ribbed tube. On the basis of the experimental results

a correlation of flow boiling heat transfer coefficient of kerosene in the internally ribbed tube is proposed. Finally the characteristics of flow boiling heat transfer with kerosene and mechanism of enhanced heat transfer in internally ribbed tube are analyzed.