Haghbakhsh Reza, Peyrovedin Hamed, Raeissi Sona, Duarte Ana Rita C, Shariati Alireza
School of Chemical and Petroleum Engineering, Shiraz University, Mollasadra Ave., Shiraz 71348-51154, Iran.
LAQV, REQUIMTE, Departamento de Química da Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal.
Entropy (Basel). 2020 Apr 3;22(4):409. doi: 10.3390/e22040409.
Deep eutectic solvents (DESs) are emerging green solvents with very unique characteristics. Their contribution to atmospheric pollution is negligible, and they can be "designed" for desired properties. In this study, the feasibility of applying DESs (Reline, Ethaline, or Glyceline) as absorbents in absorption refrigeration cycles was investigated. The sophisticated cubic-plus-association (CPA) equation of state, considering the strong intermolecular interactions of such complex systems, was used to estimate the thermodynamic properties. At a fixed set of base case operating conditions, the coefficients of performance were calculated to be 0.705, 0.713, and 0.716 for Reline/water, Ethaline/water, and Glyceline/water systems, respectively, while the corresponding mass flow rate ratios were 33.73, 11.53, and 16.06, respectively. Furthermore, the optimum operating conditions of each system were estimated. To verify the feasibility, results were compared to literature systems, including LiBr/water and various ionic liquid/water systems. The results indicate that DES/water working fluids have the potential to be used in such cycles. Since DESs have the characteristic to be tuned (designed) to desired properties, including their solvent power and their enthalpies of absorption, much further research needs to be done to propose new DESs with higher energy efficiencies.
深共熔溶剂（DESs）是一类新兴的绿色溶剂，具有非常独特的特性。它们对大气污染的贡献可忽略不计，并且可以根据所需特性进行“设计”。在本研究中，研究了将DESs（Reline、Ethaline或Glyceline）用作吸收式制冷循环中的吸收剂的可行性。考虑到此类复杂系统的强分子间相互作用，使用了复杂的立方加缔合（CPA）状态方程来估算热力学性质。在一组固定的基础工况条件下，Reline/水、Ethaline/水和Glyceline/水系统的性能系数分别计算为0.705、0.713和0.716，而相应的质量流率比分别为33.73、11.53和16.06。此外，还估算了每个系统的最佳运行条件。为了验证可行性，将结果与文献中的系统进行了比较，包括溴化锂/水和各种离子液体/水系统。结果表明，DES/水工作流体有潜力用于此类循环。由于DESs具有可根据所需特性（包括其溶剂能力和吸收焓）进行调节（设计）的特性，因此需要进行更多的研究来提出具有更高能量效率的新型DESs。
