Integrated energy systems (IESs) have gained significant attention for their ability to enhance energy efficiency and reduce carbon emissions through multi-energy coupling and complementary coordination. Absorption refrigeration technology plays a key role in IESs by utilizing low-grade waste heat for cooling supply. However, conventional working fluid pairs such as NH3/H2O and LiBr/H2O face limitations related to safety, stability, and environmental impact. This study proposes a novel low-pressure-side compression-assisted double-effect absorption refrigeration system (LC-DARS) using the environmentally friendly refrigerant R-1233zd (E) paired with the phosphonium-based ionic liquid P66614TMPP. A bi-level optimization model is developed for the LC-DARS-based IES, incorporating equipment modeling and economic evaluation. The unit capacity investment cost of the LC-DARS is calculated to be 255. 61 /kW. A case study of an industrial park in Luoyang, China, demonstrates that the proposed system achieves significant improvements in economic (29. 6%), energy efficiency (47. 0%), and environmental (59. 8%) performance compared to a conventional separate supply system. Optimal dispatch strategies for typical summer, transition season, and winter days are further analyzed, highlighting the system’s ability to operate with high autonomy and efficiency. The results validate the practical potential of the LC-DARS in enhancing IES performance and promoting sustainable energy utilization.
Sun et al. (Sat,) studied this question.
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