TY  - EJOU
AU  - Kamil, M. Gh. Mohammed 
AU  - Kassim, M. S. 
AU  - Mahmood, R. A. 
AU  - Mahdi, L. AZ 

TI  - Modeling of Heat Transfer and Steam Condensation Inside a Horizontal Flattened Tube
T2  - Fluid Dynamics \& Materials Processing

PY  - 2022
VL  - 18
IS  - 4
SN  - 1555-2578

AB  - This work investigates the steam condensation phenomena in an air-cooled condenser. The considered horizontal flattened tube has a 30 mm hydraulic diameter, and its length is a function of the steam quality with a limit value between 0.95 and 0.05. The mass flow rate ranges from 4 to 40 kg/m<sup>2</sup>.s with a saturated temperature spanning an interval from 40°C to 80°C. A special approach has been implemented using the Engineering Equation Solver (EES) to solve a series of equations for the two-phase flow pattern and the related heat transfer coefficients. A wavy-stratified structure of the two-phase flow has been found when the mass rate was between 4 and 24 kg/m<sup>2</sup>.s. In contrast, an initially annular flow is gradually converted into a wavy stratified flow (due to the condensation process taking place inside the flattened tube) when the considered range ranges from 32 to 40 kg/m<sup>2</sup>.s.
KW  - Condensation; flow pattern structure; heat transfer rate; flow in horizontal pipe; flow behaviour; EES modelling

DO  - 10.32604/fdmp.2022.018938