【作者】 吴裕远； 陈流芳； 孙薇； 柯欣； 谷雅秀； 赵亮； 史珂；

【Author】 WU Yuyuan, CHEN Liufang, SUN Wei, KE Xin, GU Yaxiu, ZHAO Liang, SHI Ke (Institute of Refrigeration and Cryogenic Engineering , Xi’an Jiaotong University , Xi’an 710049, Shaanxi, China)

【机构】 西安交通大学制冷与低温工程系；

【摘要】 根据已知制冷设计参数和热虹吸提升管的实验数据,设计并搭建了制冷量为4 kW热水型无泵溴化锂吸收式制冷机试验机组,对新建系统的降膜式吸收器的吸收性能进行了系统的实验研究。为了增强吸收器的吸收效果,对新机组吸收器水平盘管的外表面缠绕了不锈钢丝网。实验结果表明,当吸收器的吸收压力增大时,吸收过程的推动力增大,吸收器的吸收效果增强,溶液进出口的浓度差增大,吸收率增大;当吸收器中的．溶液流量增大时,吸收器的传热和传质效果变差,吸收器中溶液的进出口温度差、质量分数差和吸收率减小;随着吸收器中冷却水进口温度的升高,其溶液的进出口浓度差、进出口温度差及吸收效率将大幅度减小。究其原因, 是由于溶液的过冷度减小,导致其传质效果变差。更多还原

【Abstract】 According to the experimental results related to thermo-siphon tube and the given design parameters, a LiBr absorption chiller system with refrigeration capacity of 4 kW is designed and set up. The absorption performance of the new designed falling film absorber has been studied experimentally. In order to enhance the absorption performance of the absorber, a layer of the stainless-steel web is laid outside the horizontal coiled tube. The experimental results show that as the absorption pressure increases the driving potential for absorption increases so as to enhance the absorption performance. As the flow flux of the Libr-water solution increases the performances of heat and mass transfer decrease so as to reduce the absorption performance. As the temperature of the inlet cooling water increases the absorption performance decreases. The reason is that the decreased sub-cooling of the solution leads to the mass transfer performance.更多还原