Ammonia/salt absorption refrigeration cycle has advantages of low grade heat recovery, excellent thermal performance and simple construction, which may play an important role in refrigeration and air-conditioning fields for energy saving and emission reduction. The present paper introduces a prototype of absorption refrigeration system driven by exhaust heat operating with NH₃/LiNO₃ and NH₃/LiNO₃+H₂O, which is composed of commonly used devices with the advantages of low cost and simple manufacture. Comprehensive experiments on the prototype were carried out with varying operating conditions (exhaust-gas temperature, chilled-water temperature, cooling-water temperature) to evaluate their influences on performance parameters. The NH₃/LiNO₃ system was driven by gaseous exhaust heat in the range of 150.1°C∼325.1°C, the minimum evaporating temperature reached -25.29°C, the cooling capacities varied between 0.60kW and 3.00kW, the electrical coefficient of performance varied between 3.30 and 16.52, and the overall coefficient of performance varied between 0.263 and 0.584. The NH₃/LiNO₃+H₂O system was driven in the range of 125.8°C∼330.1°C, the minimum evaporating temperature reached -22.56°C, the cooling capacities varied between 0.92kW and 3.91kW, the electrical coefficient of performance varied between 4.65 and 20.30, and the overall coefficient of performance varied between 0.310 and 0.566. The experimental results were compared with that of NH₃/NaSCN system by authors’ previous work, it is found that three ammonia/salt working fluids have respective advantages and optimal working condition ranges. The experimental evaluation and comparison provide significant references for the optimization and practical application of the ammonia/salt absorption refrigeration systems.

氨/盐吸收式制冷循环具有热回收品位低、热性能优良、结构简单等优点，可在制冷空调领域的节能减排中发挥重要作用。本文介绍了一种利用NH ₃ /LiNO ₃和NH ₃ /LiNO ₃ +H _{2 的}废热驱动吸收式制冷系统原型。O，由常用器件组成，具有成本低、制造简单的优点。在不同的操作条件（废气温度、冷冻水温度、冷却水温度）下对原型进行了综合实验，以评估它们对性能参数的影响。NH ₃ /LiNO ₃系统由150.1℃～325.1℃范围内的气态废热驱动，最低蒸发温度达到-25.29℃，制冷量在0.60kW～3.00kW之间变化，电系数为性能在 3.30 和 16.52 之间变化，整体性能系数在 0.263 和 0.584 之间变化。NH ₃ /LiNO ₃ +H ₂O系统在125.8℃～330.1℃范围内驱动，最低蒸发温度达到-22.56℃，制冷量在0.92kW～3.91kW之间变化，电性能系数在4.65～20.30之间变化，整体性能系数在 0.310 和 0.566 之间变化。通过作者前期工作将实验结果与NH ₃ /NaSCN体系的实验结果进行对比，发现三种氨/盐工质各有优势，最佳工况范围也不同。实验评价和比较为氨/盐吸收制冷系统的优化和实际应用提供了重要参考。