一种扩散吸收式制冷系统的性能实验

Experimen of diffusion-absorption refrigeration

设计了一套带有气液分离精馏设备的吸收扩散制冷装置,试验研究了提升管结构、热源加热温度、氨水浓度、充气压力对制冷装置的影响。新型的精馏结构在提高发生氨气纯度的同时,也可减少冷凝器的负荷(冷凝器进口温度为55℃左右)。实验在环境温度T0为25-35℃,溶液浓度ξ为25%-35%,充注压力P0为13-18 MPa,加热功率Pg为220-320 W的范围内进行。结果表明:浓度的提高可获得较大的冷量,一般28-32%为宜;适当的增加系统压力可降低蒸发温度;系统的冷量随加热功率的增加而提高;确定了提升管结构参数的选取。

An improved experimental system of diffusion - absorption refrigeration based on ammonia （refrigerant） and water （ absorb- ent） as the working fluids together with helium as inert gas was set up. A new rectifier was adopted with the aim of purifying the ammonia vapor from the generator and cutting down the load of the condenser. （ the temperature of the inlet of the condenser was about 55 ℃ ） The experimental was undertaken to analysis some parameters affecting the refrigeration performance, in the condition of ambient temperature 25 - 35 ℃ ; concentration of rich solution 25% -35% , charge pressure 13 - 18MPa, heat power 220 -320W. The experimental data show： the larger cooling capacity can be obtained by increasing the concentration of the solution （28 - 32% was recommended） or increasing the heat input to the generator; the evaporate temperature can be decreased by increasing the system pressure property; the selection of the con.figuration of bubble pump was suggested.