建立了水平管降膜蒸发和管内凝结传热实验台,通过对实验结果的归纳,获得了水平管降膜蒸发器总传热系数随喷淋密度、蒸发温度、传热温差和蒸汽入口流速的变化规律,以及管间距对传热特性的影响。结果表明,总传热系数随喷淋密度、蒸发温度的增大而增大,随传热温差的增大而减小,而蒸汽流速对传热系数影响较小;在本文研究的管间距范围内,当管间距为46.7 mm时,总传热系数最高。 Based on the experimental results, the total heat transfer coefficient of the horizontal tube falling film evaporator with spray density, evaporation temperature, heat transfer temperature difference and steam inlet flow rate was obtained The variation law and the effect of tube spacing on the heat transfer characteristics. The results showed that the total heat transfer coefficient increased with the increase of spray density and evaporation temperature, but decreased with the increase of heat transfer temperature difference. However, the effect of steam flow velocity on heat transfer coefficient was insignificant. Within the tube spacing of 46.7 mm, the highest total heat transfer coefficient.