الفهرس 
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Abstract
The flow resistance of steam around the cooling tubes on large scaled condensers is one of the most essential factors which determine condenser performance. The condition of steam flowing in a condenser in the presence of the condensate inundation could be simulated by using air flowing over tubes with artificial water. The data are presented for the pressure DROP of flow across banks of tube, with a pitch to diameter ratio 1.5 in the Reynolds number range 103< Re < 25x103 and the inundation flow rate range 1=0.01 to 0.075 kg/m.s. An experimental test rig has been built and the experimental results are reported. Generally the pressure DROP coefficient increases with increasing the condensate flow rate. Besides its dependence on the steam direction with respect to the condensate flow downward.
The adapted value of the pressure DROP coefficient for two phase flow obtained experimentally in this investigation could be used to predict the heat transfer phenomenon in condenser. The equations governing the conservation of mass, momentum, and air mass fraction of steam condenser are solved. The modeling of the condenser geometry, including tube bundle and baffle plates, is used based on a porous medium concept using applicable flow, heat and mass transfer resistances.
By using the adapted value of the flow resistance, the designer can obtain a better understanding of condenser operation which should lead to further improvements.