Gaseous solubility and thermodynamic performance of absorption system using R1234yf/IL working pairs. (25th May 2020)

• Record Type: Journal Article
• Authors: Sun, Yanjun; Di, Gaolei; Wang, Jian; Hu, Yusheng; Wang, Xiaopo; He, Maogang
• Is Part Of: Applied thermal engineering. Volume 172(2020)
• Publication Date: 2020-05-25
• Subjects: Absorption-refrigeration system -- Solubility -- Ionic liquid -- R1234yf; Heat engineering -- Periodicals; Heating -- Equipment and supplies -- Periodicals; Periodicals; 621.40205
• DOI: 10.1016/j.applthermaleng.2020.115161
• Languages: English
• ISSNs: 1359-4311

Abstract

Highlights: Solubilities were measured for three new R1234yf/IL working pairs from 283.15 to 343.15 K. Several R1234yf/IL working pairs are analyzed for single-effect and compression-assisted cycles. [P66614 ][Cl] performs best among the existing R1234yf/IL working pairs. Abstract: To overcome the weaknesses of traditional working pairs (H2 O/LiBr and NH3 /H2 O) in the absorption-refrigeration systems, 2, 3, 3, 3-tetrafluoroprop-1-ene (R1234yf)/ionic liquid (IL) as a promising working pair has attracted wide attention. Using an isochoric saturation method, the solubilities were measured for three working pairs (R1234yf/[emim][Ac], R1234yf/[bmim][Ac] and R1234yf/[P66614 ][Cl]) from 283.15 to 343.15 K and the data was correlated by the NRTL model. Solubilities rise with a decrease in temperature and an increase in pressure. Highest solubility is in [P66614 ][Cl], followed by [bmim][[Ac] and [emim][Ac]. The cooling performance was studied for the single-effect and compression-assisted system using several R1234yf/IL mixtures. The effects of compression ratio, generation and evaporation temperature on the coefficient performance (COP) and circulation ratio were analyzed. Under the condensation temperature of 303 K, generation temperature of 363 K and absorption temperature of 303 K, the maximum COPs for [emim][Ac], [bmim][Ac] and [P66614 ][Cl] are respectively 013, 0.23, and 0.46 in the compression-assisted system. [P66614 ][Cl] has the highest COP and exergy coefficient of performance (ECOP) while [emim][Ac] shows lowest under the same condition.