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<p>The increasing global emphasis on sustainable energy utilization and the efficient recovery of low-grade thermal energy has driven the advancement of next-generation cooling technologies. The scientific novelty of this study lies in the development of an advanced absorption-ejector expansion refrigeration cycle (ABS-EERC) designed to systematically minimize throttling irreversibilities without expanding mechanical complexity. By synergistically combining the absorption refrigeration process with ejector technology, the system aims to achieve higher energy and exergy efficiencies compared to conventional configurations. Through rigorous thermodynamic modelling and comparative analysis, the study provides valuable insights into the potential of this integrated approach for efficient waste heat utilization, low-grade thermal energy and environmentally conscious cooling applications. The novel ABS-EERC cycle and traditional absorption-vapor compression refrigeration cycle’s (ABS-VCRC) coefficient of performance (COP), Q̇<sub>gen</sub>, and second law efficiency values were examined in relation to variations in the generator, evaporator, and condenser temperature parameters. Under T<sub>evap</sub>=0&#xa0;°C, T<sub>cond</sub>=35&#xa0;°C, and T<sub>gen</sub>=90&#xa0;°C conditions, ABS-EERC produced a 12.01% increase in second law efficiency, a 10.80% drop in Q̇<sub>gen</sub>, and a 12.06% rise in COP when compared to ABS-VCRC. Design optimization results reveal that the proposed ABS-EERC achieves a 13.6% higher COP compared to the ABS-VCRC at an equivalent total heat transfer area, demonstrating superior thermodynamic performance at the same investment cost.</p>

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Thermodynamic analysis and design optimization of a novel absorption ejector refrigeration cycle

  • 期刊论文

  • 发表日期：

    2026年8月1日

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  • Servet Giray Hacıpaşaoğlu

摘要

The increasing global emphasis on sustainable energy utilization and the efficient recovery of low-grade thermal energy has driven the advancement of next-generation cooling technologies. The scientific novelty of this study lies in the development of an advanced absorption-ejector expansion refrigeration cycle (ABS-EERC) designed to systematically minimize throttling irreversibilities without expanding mechanical complexity. By synergistically combining the absorption refrigeration process with ejector technology, the system aims to achieve higher energy and exergy efficiencies compared to conventional configurations. Through rigorous thermodynamic modelling and comparative analysis, the study provides valuable insights into the potential of this integrated approach for efficient waste heat utilization, low-grade thermal energy and environmentally conscious cooling applications. The novel ABS-EERC cycle and traditional absorption-vapor compression refrigeration cycle’s (ABS-VCRC) coefficient of performance (COP), Q̇gen, and second law efficiency values were examined in relation to variations in the generator, evaporator, and condenser temperature parameters. Under Tevap=0 °C, Tcond=35 °C, and Tgen=90 °C conditions, ABS-EERC produced a 12.01% increase in second law efficiency, a 10.80% drop in Q̇gen, and a 12.06% rise in COP when compared to ABS-VCRC. Design optimization results reveal that the proposed ABS-EERC achieves a 13.6% higher COP compared to the ABS-VCRC at an equivalent total heat transfer area, demonstrating superior thermodynamic performance at the same investment cost.