Share

Effect of lubricant oil on thermal performance of CO2 gas cooler.

[In Chinese. / En chinois.]

Author(s) : DAI B., LI M., MA Y., et al.

Type of article: Article

Summary

A theoretical model of CO2 gas cooler with PAG lubricant was developed. The heat transfer coefficient was predicted based on artificial neural network, and then the model was validated with experimental results. Further calculation shows that the thermal effectiveness increases with the length of the gas cooler tube, but the increase rate decreases gradually. Therefore, the length of the gas cooler tube should be properly designed considering the economical running in the practical applications.For the gas cooler with a smaller diameter (Dh = 2 mm), a small amount of lubricant significantly deteriorates the thermal effectiveness while for that with a larger diameter (Dh= 4 mm), the influence is not so apparent. Consequently, the oil concentration should be decreased as far as possible to keep high heat transfer performance of the small diameter gas cooler. The gas cooler performances better at higher CO2 side pressure.However, the increase rate of the thermal effectiveness decrease gradually as the pressure increases. At pressure approaching to the critical pressure, the degradation of the thermal effectiveness is more significant. Additionally, the deterioration is more apparent as the diameter decreases.

Available documents

Format PDF

Pages: 1-8

Available

  • Public price

    20 €

  • Member price*

    15 €

* Best rate depending on membership category (see the detailed benefits of individual and corporate memberships).

Details

  • Original title: [In Chinese. / En chinois.]
  • Record ID : 30020633
  • Languages: Chinese
  • Source: Journal of Refrigeration - vol. 35 - n. 160
  • Publication date: 2014/12

Links


See other articles in this issue (11)
See the source

Indexing