Multiple-lift absorption cycles are an interesting option for cooling and refrigeration driven by waste or renewable heat. Compared with single effect cycles, they allow higher thermal lift or lower thrust, but they often require the use of controlled valves, which can cause stability and control issues. The self-adapting concept, firstly introduced in the two-pump series-flow double-lift cycle, replaces the valve with a phase separator, overcoming this drawback. In this work, five new cycle layouts, incorporating the self-adapting concept, are presented: the one-pump series-flow double-lift cycle and four triple-lift cycles. The cycles are compared in terms of COP and heat duties under various conditions, using NH₃H₂O and NH₃–LiNO₃ as working pairs. It is found that the double-lift cycles have a COP in the range 0.35–0.20, about 0.1 higher than the triple-lift cycles. However, triple-lift cycles accept cooling water temperature up to 8 °C higher. Cycles with multiple pumps have higher efficiency than single-pump cycles, especially at high lift conditions. The use of NH₃H₂O as working pair guarantees higher COP at low thermal lift, while NH₃–LiNO₃ has wider operating range and better performances at high thermal lift.

对于由废料或可再生热量驱动的制冷和冷藏，多次提升吸收循环是一个有趣的选择。与单作用循环相比，它们允许更高的热升力或更低的推力，但它们通常需要使用受控阀，这可能会导致稳定性和控制问题。自适应概念首先在双泵双流双提升循环中引入，克服了这一缺点，用分相器代替了阀门。在这项工作中，提出了五个具有自适应概念的新循环布局：单泵串联流双提升循环和四个三提升循环。使用NH ₃ H ₂ O和NH ₃ -LiNO ₃比较各种条件下循环的COP和热负荷。作为工作对。发现双提升循环的COP范围为0.35-0.20，比三提升循环的COP高约0.1。但是，三重提升循环可以接受高达8°C的冷却水温度。多泵循环比单泵循环效率更高，尤其是在高升程条件下。NH ₃ H ₂ O作为工作对的使用可确保在低热升力下具有较高的COP，而NH ₃ -LiNO ₃具有较宽的工作范围，并在高热升力下具有更好的性能。