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Evaluation of proper HFO refrigerant/ionic liquid mixture for absorption refrigeration system.

Number: 0206

Author(s) : LEE Y., LEE G., CHO J., CHOI B., GU HAN N., KIM D. K.

Summary

This study is to evaluate ionic liquid as absorbents for absorption refrigeration system using Hydrofluoro-olefin (HFO) refrigerant. By examining properties of absorbent/refrigerant mixture, we found the most efficient absorbent/refrigerant pair for the absorption refrigeration system. First, we analyzed characteristics of ionic liquid as absorbent in absorption refrigeration system. Imidazolium ionic liquids have relatively low viscosity of about 10 mPa.s at 70°C and high stability to water and air, so that we decided to apply imidazolium ionic liquid as absorbent. Then, we examined proper HFO refrigerant for the system. Among the refrigerants, R1336mzz(Z) and R1234ze(Z) are applicable for the absorption refrigeration system because both have low inflammability, and high critical points over 150 oC. Next, we analyzed characteristics of absorbent/refrigerant pair. When [OMIM][BF4] is used as absorbent, R1336mzz(Z) and R1234ze(Z) have the highest solubility of 0.05848 and 0.66149 at absorber, respectively. Lastly, we analyzed performance of the refrigeration system. Since difference of solubility of [OMIM][BF4]/R1234ze(Z) is large between absorber and generator, it shows the highest COP than other pairs.

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Pages: 8 p.

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Details

  • Original title: Evaluation of proper HFO refrigerant/ionic liquid mixture for absorption refrigeration system.
  • Record ID : 30031105
  • Languages: English
  • Subject: Technology
  • Source: 14th IEA Heat Pump Conference 2023, Chicago, Illinois.
  • Publication date: 2023/05/15

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