液相添加剂对纳米溴化锂溶液表面张力和沸腾温度的影响  

Influence of Liquid Additives on the Surface Tension and the Boiling Temperature of a Nano-LiBr Aqueous Solution

作　　者：李云翔[1] 解国珍[1] 安龙[1] 田泽辉[1] 王刚[1] 

机构地区：[1]北京建筑大学,北京100044

出　　处：《制冷与空调（四川）》2014年第5期509-512,共4页Refrigeration and Air Conditioning

基　　金：国家自然科学基金项目(编号:51176007);北京供热;供燃气;通风与空调工程重点实验室资助

摘　　要：通过在纳米溴化锂溶液中添加液相添加剂降低溶液沸腾温度,从而有助于大幅度应用工业余热、废热等低品味热源。溶液沸腾温度主要反映了溶液汽泡成核所需的临界活化能(过热度)。尽管影响沸腾温度的因素较多,但是溶液的表面张力是一个重要的因素。此外纳米流体中的分散剂能造成纳米颗粒在加热面上如淤泥般的沉积,湮没了汽化核心,导致沸腾温度升高。By adding the aqueous surface active agents into a nano-lithium bromide aqueous solution, boiling temperature of the soluton decreases, which is beneficial to use industrial waste heat. Boiling temperature expresses the bubble nucleation activation energy （superheat） of the solution. Though there are many factors to influence on the boiling temperature, surface tension of the solution palys an important role. In addition, dispersant, to be added into the nano-solution, can cause the deposition of nanoparticles such as silt on the surface of the heating, obliterated the vaporization core, and boiling temperature increasing.

关 键 词：表面张力 沸腾温度 纳米溴化锂溶液 液相添加剂 

分 类 号：TB66[一般工业技术—制冷工程]