Chacracteristics of In–Line Tube Bundle Heat Transfer to Vertical Foam Flow
Jonas Gylys1,a, Stasys Sinkunas2,c, Tadas Zdankus1,b and Martynas Babilas2,d
1Energy Technology Institute, Kaunas University of Technology, Kaunas, LT-44239 Lithuania.
ajonas.gylys@ktu.lt
btadas.zdankus@ktu.lt
2Department of Thermal and Nuclear Energy, Kaunas University of Technology, Kaunas, LT-44239 Lithuania.
cstasys.sinkunas@ktu.lt
dmartynas.babilas@stud.ktu.lt
ABSTRACT
An experimental investigation of heat transfer from the in-line tube bundle to the two-phase gas-liquid foam flow was
performed. Statically stable foam flow was used as a coolant.
The experimental setup consisted of the foam generator,
experimental channel, in-line tube bundle, measurement
instrumentation and auxiliary equipment. During the
experiments the dependence of heat transfer intensity on flow
parameters, viz., flow velocity, direction of flow and
volumetric void fraction of foam was determined. Further, the
influence of tube position of the bundle on heat transfer
intensity was also investigated. The results of the investigation
showed, that characteristics of in-line tube bundle heat
transfer to vertical foam flow is different in comparison with
one-phase fluid flow. Heat transfer intensity of the in-line
tube bundle to the foam flow is much higher (from 25 to 100
times) than that to the one-phase airflow under the same flow
velocity.
Keywords: Heat transfer, Foam flow, In–line tube bundle,
Upward and Downward flow.
Full Text (PDF)
|
