翅片同心管吸附器解吸过程传热性能实验研究

摘要

In order to enhance heat transfer in finned concentric tube adsorbers during desorption processes, the heat transfer performance of finned concentric tube adsorbers with different heights of 30 cm, 40 cm and 50 cm were studied with water-bath heating. The results show that the desorption heat of the adsorbate increases with the increase of adsorbent temperature. Under same adsorbent temperature, lower condensing temperature results in higher desorption heat of the adsorbate. The sensible heats of adsorbent and adsorbate increase with the increase of adsorbent temperature in the concentric tube. Moreover, the sensible heat of the adsorbent is much larger than that of the adsorbate under same temperature. The temperature of the mass transfer channel in the finned concentric tube is close to the temperature in the middle of the adsorbent, with temperature difference of 0.1~1.5. Compared with the 30 and 50 cm finned concentric tube adsorbers, the temperature variation ℃coefficient in the mass transfer channel of the 40 cm finned concentric tube adsorber is relatively more stable.%为了研究翅片同心管吸附器在加热解吸过程中的传热性能,采用水浴式加热方法对30、40、50 cm三种高度不同的翅片同心管吸附器进行了实验研究.研究结果表明:在加热解吸的过程中,吸附质的脱附热随着吸附剂温度的升高而增大;在相同吸附剂温度下,冷凝管的冷凝温度越低,吸附质的脱附热越大;翅片同心管内吸附剂和吸附质的显热随吸附剂温度的升高而增大,且在相同温度下,吸附剂的显热远大于吸附质的显热;翅片同心管内传质通道的温度与吸附管中段的吸附剂温度最为接近,两者的温度相差0.1~1.5 ℃;与30、 50 cm翅片同心管吸附器相比,40 cm翅片同心管吸附器传质通道内温度的变异系数相对比较稳定.