Novel ionic-liquid-based low-GWP working fluids used for hybrid low-temperature absorption cooling

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Original languageEnglish
Pages (from-to)1620-1625
Journal / PublicationEnergy Procedia
Publication statusPublished - Feb 2019


Title10th International Conference on Applied Energy (ICAE 2018)
CityHong Kong
Period22 - 25 August 2018



Absorption cooling cycles are promising renewable/waste energy technologies for building energy efficiency. To overcome the two major shortcomings (working fluid and driving temperature) of conventional absorption cooling technologies, various ionic-liquid-based low-global-warming-potential working fluids were investigated for different hybrid low-temperature absorption cooling cycles. Results showed that the hybrid cycle not only greatly enhanced the coefficient of performance (COP) but also lowered the driving temperature from 60~70 ºC to below 45 ºC. R32 performed the best, with a maximum COP of 0.670, while R1234yf performed the worst, with a maximum COP of 0.430. The optimal compression ratio of the hybrid cycle is 1.9~3.4 for maximum COP and 1.3~2.2 for maximum exergy COP. The low-side hybrid absorption cycle is a better choice in terms of high cycle efficiency and low discharge temperature. This work can facilitate better utilization of lower-temperature renewable/waste energy.

Research Area(s)

  • Hybrid absorption cooling, Ionic liquid, Low GWP, Renewable and waste energy

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