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Licensed Unlicensed Requires Authentication Published by De Gruyter August 10, 2022

Experimental study on direct contact condensation of saturated steam at low mass flux in subcooled quiescent water

Muhammad Ahsan Kaleem , Ajmal Shah , Mazhar Iqbal , Abdul Quddus ORCID logo EMAIL logo , Atif Mehmood , Ali Riaz and Muhammad Khawar Ayub
From the journal Kerntechnik

Abstract

The phenomenon of saturated steam jet injection in subcooled quiescent water has many practical applications including in heat exchangers, steam jet pumps, steam dumping systems in nuclear plants, etc. The experimental setup is designed and fabricated indigenously to investigate this phenomenon at lower mass fluxes ∼120 and 150 kg/m2 s. The steam jet of conical shape has been observed for all the test conditions. The recorded axial temperature distribution showed that near the nozzle region, the temperature is governed by the saturated condition of steam while the later region is dependent on the water pool temperature. The maximum temperature is observed to be at the center of the jet. It has been found that the dimensionless penetration length of the steam jet in water is directly dependent on both the temperature of the water pool and the mass flux of steam. The dimensionless jet length has been found in the range ∼1.54–2.02 and 2.07–2.19 for mass fluxes ∼120 and 150 kg/m2 s, respectively. The average heat transfer coefficient has been found in the range ∼1.97–2.37 MW/m2 K.


Corresponding author: Abdul Quddus, Department of Mechanical Engineering, Pakistan Institute of Engineering and Applied Sciences, P. O. Nilore, Islamabad, Pakistan, E-mail:

  1. Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: None declared.

  3. Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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Received: 2021-11-29
Published Online: 2022-08-10
Published in Print: 2022-10-26

© 2022 Walter de Gruyter GmbH, Berlin/Boston

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