Experimental Study of Air-Steam–Mixture Condensation Underneath Containment Vessel Surface. (3rd August 2021)

• Record Type: Journal Article
• Authors: Tan, Bing; Tian, W. X.; Chen, R. H.; Qiu, S. Z.; Su, G. H.
• Is Part Of: Nuclear science and engineering. Volume 195:Number 8(2020)
• Page Start: 838
• Page End: 852
• Publication Date: 2021-08-03
• Subjects: Passive cooling system -- steam condensation -- flow regime -- new empirical correlation; Nuclear energy -- Periodicals; Nuclear engineering -- Periodicals; Nuclear energy; Nuclear engineering; Periodicals; 539.705
• DOI: 10.1080/00295639.2021.1878780
• Languages: English
• ISSNs: 0029-5639

Abstract

Abstract: Aiming at studying the condensate flow phenomenon and air-steam–mixture condensation heat transfer underneath a containment vessel surface, a test bench was constructed. The plate dimension was 1.5 × 0.6 m, with Carbozinc 11 coating on the surface, suspended in a pressure vessel with 2.5-m diameter and 4.5-m height. The air-steam mixture was condensed on an inclined plate through natural convection mode and jet mode. By observing flow behavior on the plate through a viewport, four basic regimes were obtained as the inclination angle gradually increased: droplet, droplet to rivulet transition, developed rivulet, and uniform film. During the experiment, we observed a steam atomization phenomenon; therefore, the model predicted better with the atomization effect considered. A simple formula from the condensation data is proposed when the air mole fraction is small. The error between the experimental results and the predicted data is within 25%.