TY  - JOUR
T1  - Drop Condensation of Steam in a Vertical Tube at Different Pressures
AU - Muneer, Ayser 
JO  - Journal of Engineering and Applied Sciences
VL  - 14
IS  - 13
SP  - 4356
EP  - 4361
PY  - 2019
DA  - 2001/08/19
SN  - 1816-949x
DO  - jeasci.2019.4356.4361
UR  - https://makhillpublications.co/view-article.php?doi=jeasci.2019.4356.4361
KW  - Dropwise condensation
KW  -different steam pressures
KW  -different cooling water temperatures
KW  -differentsteam generator
KW  -comparison between dropwise and filmwise condensation
KW  -pure steam
AB  - In the present research experimental data on heat transfer are obtained for the condensation of almost
pure steam on vertical tubes (polished is gold plated). The condenser pipe is a 12 mm outer diameter, 96 mm
condenser length tube. The experiments were carried out at steam pressures of 0.15, 0.2, 0.25, 0.3, 0.35, 0.4 and
0.45 bar, cooling water temperature difference varied from 17-19°C and steam generator is rang 900, 1200 and
1500 W. In this research, the high rate of heat transfer on the steam-to-wall temperature variance (difference)
for dropwies condensation of steam on the vertical tube are determined experimentally for several pressures
range. The experimental results are compared with film condensation results at different pressures, the dropwise
condensation showed much higher heat transfer rates and film coefficients rate than corresponding filmwise
condensation by 3-4 times. However, the dropwise condensation showed even higher condensation rate than
filmwise condensation with the different steam pressures. The drowpwise condensation showed that it
gradually, increases in the rate of heat transfer as the steam pressure increased and as the cooling water rate
decreased.
ER  -