Heat transfer in dropwise condensation at low steam pressures in the absence and presence of non-condensable gas
Heat transfer in dropwise condensation at low steam pressures in the absence and presence of non-condensable gas
复制标题
DOI：
10.1016/0017-9310(68)90148-8
复制
发表时间：
1968-02
影响因子：
5.2
通讯作者：
D. W. Tanner;D. Pope;C. J. Potter;D. West
中科院分区：
文献类型：
--
作者：
D. W. Tanner;D. Pope;C. J. Potter;D. West
本文报道了在5000-30000 Btu/ft ~ 2·h的热流密度范围内，在0·8-3英寸汞柱的蒸汽压力下，用褐煤蜡和双十八烷基二硫化物促进水蒸汽在铜表面滴状冷凝时的蒸汽侧传热系数的测量结果。不凝性气体体积浓度在< 1和15000 ppm之间变化。在低不凝性气体浓度下，在所研究的蒸汽压力范围内，蒸汽侧传热系数在10000和28000 Btu/ft 2 h degF之间变化，这表明水的冷凝系数至少为0·1。
Measurements are reported of steam-side heat-transfer coefficients during the dropwise condensation of steam on copper surfaces promoted by montan wax and dioctadecyl disulphide, over the heat flux range 5000–30000 Btu/ft2h and at steam pressures of 0·8–3-in mercury. The noncondensable gas concentration by volume was varied between < 1 and 15000 ppm. At low non-condensable gas concentrations, the steam-side heat-transfer coefficients varied between 10000 and 28000 Btu/ft2h degF over the steam pressure ranges studied which would indicate that the condensation coefficient for water is at least 0·1.