小型风冷吸收式制冷研究进展

A review of developments in small size air-cooled absorption refrigeration

现有风冷吸收分别对传热与传质加以强化,绝热吸收有助于实现吸收器小型化,但存在溶液再循环量过大和再循环泵能耗大的问题。该文结合喷射器与超声波二者优势,以实现太阳能吸收式制冷机小型风冷化、高效化为目标,提出一种基于喷射器-超声波的绝热吸收制冷循环,以期利用喷射器回收溶液节流损失并提高吸收器压力,减少再循环倍率,利用超声波在绝热吸收器内的真空雾化增大吸收传质过程空间和时间,增强吸收效果。

The existing air - cooled absorption strengthens the heat transfer and mass transfer respectively, the adiabatic absorption contributes to the miniaturization of the absorber. Utilizing the conventional adiabatic absorption will cause much higher solution recirculation ratio and greater recirculation pump energy consumption. Combining the advantages of both ejector and ultrasonic wave, a new type of adiabatic absorption refrigeration cycle based on ejector - ultrasonic wave was proposed to realize the small - scale air - cooled and high efficiency of solar absorption chiller. The throttling loss of the solution was recovered and the absorber pressure was increased by using the ejector and the recirculation rate reduced. The vacuum atomization in the adiabatic absorber increased the space and time of the absorption mass transfer process and enhanced the absorption effect.