Analysis of Tube Bank Heat Transfer In Downward Directed Foam Flow

• Main Authors: Jonas Gylys, Gintautas Miliauskas, Stasys Sinkunas, Tadas Zdankus
• Format: Article
• Language: English
• Published: International Institute of Informatics and Cybernetics 2004-06-01
• Series: Journal of Systemics, Cybernetics and Informatics
• Subjects: Foam Flow; Tube Bundle; Gas Velocity; Void Fraction; Downward Flow; Heat Transfer
• Online Access: http://www.iiisci.org/Journal/CV$/sci/pdfs/P519667.pdf

Apparatus with the foam flow are suitable to use in different technologies like heat exchangers, food industry, chemical and oil processing industry. Statically stable liquid foam until now is used in technologic systems rather seldom. Although a usage of this type of foam as heat transfer agent in foam equipment has a number of advantages in comparison with one phase liquid equipment: small quantity of liquid is required, heat transfer rate is rather high, mass of equipment is much smaller, energy consumption for foam delivery into heat transfer zone is lower. The paper analyzes the peculiarities of heat transfer from distributed in staggered order and perpendicular to foam flow in channel of rectangular cross section tube bundle to the foam flow. It was estimated the dependence of mean gas velocity and volumetric void fraction of foam flow to heat transfer in downward foam flow. Significant difference of heat transfer intensity from front and back tubes of tube row in laminar foam flow was noticed. Dependence of heat transfer on flow velocity and volumetric void fraction of foam was confirmed and estimated by criterion equations.