套片蛇形管滴淋式发生器性能实验研究

Experimental study on theperformance of serpentine coil with fins drip-type generator

自行搭建采用套片蛇形管滴淋式发生器的吸收制冷实验装置,并进行发生器性能实验研究。实验结果表明:发生器部件传热存在一个最佳的滴淋稀溶液循环量。随着发生器入口热水温度的增加,发生器热负荷及发生温度均增加。在较小滴淋密度条件下,随着稀溶液滴淋密度的增加,溶液在发生器管外的扰动增强,对流传热系数也随之增加。在实验工况范围内,发生器管外侧对流表面传热系数在150-480 W/(m^2·℃)之间。

The absorption refrigeration experimental device with a serpentine tube with copper fins generator was built by ourselves and experimental research on the thermal performance of the generator was carried out. The experimental results show that there is an optimum amount of dilute solution circulation for the generator. As the hot water inlet temperature of the generator increases, both the generator heat load and the generation temperature increase. As the spray density of the dilute solution increases, the disturbance of the solution outside the heat transfer tubes in generator is strengthened, and the convective heat transfer coefficient increases. In the experimental conditions, the convective heat transfer coefficient of the lithium bromide solution outside the generator tubes is between 150-480 W/(m^2·℃).