Dimensionless Local and Average Boiling Heat Transfer Correlation for Saturated Liquids

作者：Das Mihir K^*; Gupta S C; Agarwal V K

来源：Heat Transfer Research, 2010, 41(5): 531-558.

DOI：10.1615/HeatTransRes.v41.i5.40

• pool boiling
• local heat transfer coefficient
• distilled water
• methanol
• isopropanol
• sub-atmospheric pressure
• dimensionless correlation

The present study is an experimental investigation on nucleate pool boiling of saturated liquids namely, distilled water, methanol, and isopropanol over a plain copper heating tube at atmospheric and sub-atmospheric pressures. The study includes the effect of operating parameters, i.e., heat flux and pressure on the boiling heat transfer coefficient of saturated liquids on a copper heating tube. The boiling heat transfer coefficient is determined locally at the bottom, two sides and at the top position of the heating tube and a dimensionless equation of the form h*psi/h*psi = [(a + b cos psi) / (a + b cos psi)(1)](p/p1)(0.32) is established for prediction of the local boiling heat transfer coefficient at different pressures. Further, a dimensional equation, h = Cq(0.7) p(0.32), is established for determination of the average boiling heat transfer coefficient of saturated liquids on a plain copper heating tube. The dimensionless correlations of earlier investigators are tested with experimental data of the present investigation for the sake of comparison. Further, a dimensionless correlation of the Nu*(B) = C(sf)(Pe*(B))(0.7) (K(p))(0.7) (Pr)(-0.67) is proposed. The correlation is found to fit experimental data of the present investigation within a maximum error of +/- 6.

• 出版日期2010