Experimental studies on condensation of steam mixed with noncondensable gas inside the vertical tube in a pool filled with subcooled water

N. K. Maheshwari; D. Saha; R. K. Sinha; M. Aritomi

doi:10.1515/kern-2003-0089

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Experimental studies on condensation of steam mixed with noncondensable gas inside the vertical tube in a pool filled with subcooled water

N. K. Maheshwari , D. Saha , R. K. Sinha and M. Aritomi

Published/Copyright: March 16, 2022

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From the journal Kerntechnik Volume 68 Issue 5-6

Abstract

A passive containment cooling system with immersed condensers has been proposed as one of the alternatives for the Advanced Heavy Water Reactor (AHWR) being designed in India. The system removes residual/decay heat released into the containment through the immersed condensers kept in a pool of water following loss of coolant accident. An important aspect of the immersed condensers is the potential degradation of its performance due to the presence of noncondensable gases. Experiments are performed to obtain reliable data on condensation phenomena in presence of air. These experiments are conducted on full-scale tubes of condensers immersed in a pool of water maintaining similar conditions as in the prototype of AHWR. A method has been proposed for the determination of the local heat transfer rate using correlations given in literature. The parametric effects of air mass fraction, pressure, steam flow, etc. on condensation heat transfer in presence of noncondensable gas have been studied. The experimental results are compared with the correlations given in literature.

Abstract

Ein passives Containment Kühlsystem mit Tauchkondensatoren wurde vorgeschlagen als eine der Alternativen für den in Indien entwickelten Fortgeschrittenen Schwerwasserreaktor (AHWR). Das System beseitigt Restwärme, die in das Containment freigesetzt wird durch Tauchkondensatoren in einem Wasserpool nach einem Unfall durch Kühlmittelverlust. Ein wichtiger Aspekt bei den Tauchkondensatoren ist die potentielle Degradation ihrer Leistungsfähigkeit wegen des Vorhandenseins nichtkondensierbarer Gase. Experimente wurden durchgeführt, um zuverlässige Daten über Kondensationsphänomene bei Vorhandensein von Luft zu erhalten. Diese Experimente wurden ausgeführt an original-großen Röhren von Kondensatoren, eingetaucht in einen Wasserpool unter Beibehaltung ähnlicher Bedingungen wie beim Prototyp des AHWR. Mit Hilfe von Literaturdaten wird eine Methode für die Bestimmung der lokalen Wärmeübertragungsgeschwindigkeit vorgeschlagen. Die parametrischen Effekte von Luftmassenanteilen, Druck, Dampfdurchsatz, etc. auf die Wärmeübertragung durch Kondensation bei Vorhandensein nichtkondensierbarer Gase wurde untersucht. Die experimentellen Ergebnisse wurden verglichen mit Literaturangaben.

References

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Received: 2003-05-05

Published Online: 2022-03-16

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https://doi.org/10.1515/kern-2003-0089