Boiling heat transfer from a vertical row of horizontal tubes

An experimental investigation was carried out to measure the enhancement in the nucleate pool boiling heat transfer of upper heating tubes of copper having 32 mm outer diameter (OD), 18.2 mm internal diameter (ID), and 100 mm effective length, placed one over another in a vertical row as a function of heat flux, type of liquid, and tube material and surface characteristics. Based on the data of present work and similar experiment work of other investigators a model was developed to predict the heat transfer coefficient of individual tube in a multi-tube row and the bundle heat transfer coefficient. The heat flux and pressure range covered was 19–45 kW/m2 and 35.36–97.5 kPa, respectively. The developed model predicts the experimental data for benzene, toluene, distilled water, and R-113 within ±15%.