扩散吸收式制冷系统液体循环探讨

Investigation on the Liquid Cycle of Diffusion-absorption Refrigerating System

应用汽液两相流、溶液热力学和热虹吸原理对扩散吸收式制冷系统液体循环进行了理论探讨,揭示了发生器、吸收器、贮液罐之间结构参数匹配与工质物性参数、流动参数的内在联系,得出了维持热虹吸汽液两相绝热弹状流的热虹吸管径选择范围,并以NH_3-LiNO_3-H_2三工质为例进行了具体计算和讨论。

Theoretical investigation on the liquid cycle of diffusion-absorption refrigerating system is made with the principles of gas-liquid two phase flow, solution thermodynamics and thermosiphon. The internal relationship between the structure matching parameters of generator, absorber, reservoir and thermoparameters, folw parameters of working fluids are brought to light. The resonable thermosiphon tube diameters are obtained, which maintain the adiabatic steady two phase flow in the thermosiphon tube. The corresponding calculation with working fluids NH_3-LiNO_3-H_2 and discussion are made at the end of this paper.