摘要
螺旋槽管由于传热性能好、抗污垢能力强、制造又比较方便,日益受到人们的重视。但过去多着重于多头深槽螺旋槽管的研究,由于槽深偏深,流动阻力过大,热力性能指标不高。在技术上,以前大多采用等热流方法,因而得不到在凝结条件下凝结强化换热系数。采用等壁温方法进行水平螺旋槽管凝结换热试验研究很少。为此,我们设计了在凝结条件下进行浅槽单头水平螺旋槽管换热研究的试验台,采用等壁温方法测量壳程为蒸汽、管程为水的换热系数,求出了相应的关联式及最佳参数。本研究成果业已运用在N25—3.
The coefficients of condensation heat transfer and heat connection are studied in the heat exchanger with spirally corrugated tubes (depth h≤1mm) in the shell-tube type horizontal heat exchanger. The heat exchanger has low pressure steam (about 0. 12MPa) to be condensed outside the tubes and coolant water to flow through the tubes. Dimensionless experimental expressions for calculating drag coefficient and heat transfer coefficient are obtained and the best construction of the spiral tube is recommended.
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
1993年第5期126-130,共5页
Journal of Southeast University：Natural Science Edition
关键词
凝结传热
螺旋槽管
传热
condensation. heat transfer/spirally indented tubes, enhanced heat transfer
