低温翅片管换热器的传热试验研究

An experimental study of heat transfer characteristics of a cryogenic finned-tube heat exchanger

为了研究翅片管换热器在低温工况下的传热性能,进行了翅片管汽化器的气化试验。采用低温热电偶连续测量翅片管汽化器8个不同位置的温度,得到8条温度曲线。分析曲线表明气化过程可归结为非稳态与稳态两个阶段,并经历液相、汽液两相及气相三个传热区。试验结果为同类换热器的分段设计提供了依据。

A gasification test was completed to investigate the heat transfer performance of the finned -tube heat exchanger under low - temperature Conditions. Eight temperature curves were presented through successive temperature measuring with the cryogenic thermo- couple at eight different positions of a finned - tube evaporator. The analysis of the temperature curves showed that the gasifying process can be classified as two stages of unsteady and steady heat transfers, and goes through three zones of liquid phase, gas - liquid two - phase and gas uhase heat transfers. The results provided a basis for the subsection design of similar heat exchangers.