由曹祥、梁星宇、邵亮亮、张春路（通讯作者）撰写的论文Performance analysis of an ejector-assisted two-stage evaporation single-stage vapor-compression cycle在Applied Thermal Engineering 2022年第205卷在线发表。作者通过喷射器可提升压缩机吸气压力的原理，构建了一种新型的双蒸发温度单级压缩循环，将喷射器循环和梯级吸气循环进行了巧妙组合，具有双重的节能潜力。但是，研究也发现该新循环节能潜力与制冷剂类型和运行工况等相关。本文研究为更好地应用该循环指明了方向。

论文链接

论文摘要：

For actual vapor-compression refrigeration or heat pump systems with variable-temperature heat reservoirs, two-stage evaporation cycle is an efficient way to improve the coefficient of performance (COP). However, its application is limited because the two-stage evaporation cycle requires two individual suction pressures carried out by two cylinders or two compressors. To solve this problem, a two-stage evaporation cycle with a common single-stage compressor is proposed. An ejector is applied to lift the lower evaporation pressure up to the higher evaporation pressure or the compressor suction pressure. A thermodynamic model is developed to analyze its performance. Numerical results indicate that the COP of the novel cycle is 12.1% higher than the ejector cycle, 6.9% higher than the two-stage evaporation cycle and 22.0% higher than the basic refrigeration cycle under rated operating conditions. The exergy analysis indicates that TSEC-E can reduce 49.6% exergy loss of expansion process and 21.5% exergy loss of heat transfer process in evaporators in comparison with the basic refrigeration cycle. Although TSEC-E is applicable with various refrigerants, particularly it is more effective for CO2 transcritical cycle. Moreover, performance improvement of the novel cycle under variable operating conditions is numerically investigated.