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Experimental study on physical properties of CuO - PVE nano-oil and its mixture with refrigerant.

Number: pap. 1569

Author(s) : MOTOZAWA M., MAKIDA N., FUKUTA M.

Summary

A nano-oil is a suspension of nano-order particles in refrigeration oil. Recently, the application of nano-oil as the lubrication oil for refrigerant compressors is proposed to improve refrigeration cycle efficiency. In this study, physical properties of nano-oil such as thermal conductivity, viscosity and dielectric constant were measured experimentally. In addition, those of nano-oil / refrigerant mixture were also measured under pressurized condition. Nano-oil was prepared by dispersing oxidized copper (CuO) nanoparticles into refrigeration oil (Polyvinyl ether; PVE) with the volume fraction of 0.5, 1.0 and 3.0 vol%. Measurement of physical properties of nano-oil was performed under the temperature ranging from 30 to 100°C. The result shows that thermal conductivity, viscosity and dielectric constant of the nano-oil are larger than those of the base oil. The increment of these properties becomes large with volume fraction of nano-particles. On the other hand, measurement of physical properties of PVE-CuO nano-oil / R410A mixture was performed under the 30°C of temperature and up to 1.3 MPa of pressure. As a result, thermal conductivity, viscosity and dielectric constant of nano-oil / refrigerant mixture increases compared with those without mixing nano particles for low refrigerant concentration, but the effect of adding nanoparticles with pure oil becomes weak with increasing refrigerant concentration.

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Pages: 9

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Details

  • Original title: Experimental study on physical properties of CuO - PVE nano-oil and its mixture with refrigerant.
  • Record ID : 30024375
  • Languages: English
  • Source: 2018 Purdue Conferences. 24th International Compressor Engineering Conference at Purdue.
  • Publication date: 2018/07/09

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