不凝气体存在时水平管束冷凝换热特性的试验研究

Condensation Heat Transfer Characteristics of a Horizontal Tube Bundle with Non Condensable Gas

通过对水平管束管间冷凝换热特性的试验研究 ,探讨并分析了冷却水流量以及不凝气体质量分数对管束冷凝换热的影响规律和机理 .试验结果表明 ,当有不凝气体存在时 ,冷凝放热系数最小值并不一定发生在最低排管上 ,冷凝放热系数最小值与冷却水流量和不凝气体质量分数均有关 .研究结果为凝汽器的进一步传热强化研究提供了依据 .

Condensation heat transfer characteristics is investigated for a horizontal tube bundle with non condensable gas. The lowest condensation heat transfer coefficient could be obtained in the middle of a tube boundle, which depending on the mass flux of cooling water and mass concentration of non condensable gas. The results provide information for improving condensation heat transfer.