Details

Autor(en) / Beteiligte

• Mohanta, Lokanath
• Sohag, Faruk A.
• Cheung, Fan-Bill
• Bajorek, Stephen M.
• Kelly, Joseph M.
• Tien, Kirk
• Hoxie, Chris L.

Titel

Heat transfer correlation for film boiling in vertical upward flow

Ist Teil von

• International journal of heat and mass transfer, 2017-04, Vol.107, p.112-122

Ort / Verlag

Oxford: Elsevier Ltd

Erscheinungsjahr

2017

Link zum Volltext

Quelle

Elsevier ScienceDirect Journals Complete

Beschreibungen/Notizen

• •Developed a correlation for flow film boiling covering IAFB and ISFB regimes.•Flow Visualization in the flow film boiling in vertical rod bundle is presented.•A semi-empirical model is presented relating Nusselt number to flow variables.•The new correlation predicts test data from other tests within ±20% error. There is no heat transfer correlation available in the Inverted Slug Film Boiling (ISFB) regime. In this study, a new correlation for film boiling in a vertical channel is proposed using a semi-empirical model. This correlation is applicable in the Inverted Annular Film Boiling (IAFB) heat transfer regime as well as ISFB heat transfer regime. A semi-empirical model is developed to establish the functional dependence of the Nusselt number on various controlling parameters. Test data obtained from the transient reflood tests carried out in a full length 7×7 vertical Rod Bundle Heat Transfer (RBHT) facility are used to develop the correlation. The predicted Nusselt number agrees within 15% with the RBHT data set and other data set available in the literature. This heat transfer correlation is applicable up to a void fraction of 90%, i.e., both in the IAFB and ISFB regimes. The proposed correlation is also applicable to a tube geometry using a modified coefficient in the correlation with an error less than 10%.