Heat transfer and hydraulic resistance during condensation of steam in a horizontal tube and in a bundle of tubes

Abstract The paper presents an approximate prediction of heat transfer during steam condensation inside a tube on the basis of the analogy between hydraulic resistance and heat transfer in accordance with Reynolds' theory. It describes experimental results obtained by the authors during the condensation of steam inside tubes with diameter of 18 mm and lengths up to 12 m at pressures up to 90 bar. Theoretical and experimental results agree satisfactorily. It also describes original experimental results on tube hydraulic resistance during condensation of steam therein. Finally, it describes experimental results on the conditions of heat transfer during condensatory flow of steam inside tube bundle.