Share

IIR document

A study on the compressor frequency and optimal discharge pressure of the transcritical CO2 heat pump system.

Author(s) : QIN X., LIU H., MENG X., et al.

Type of article: Article, IJR article

Summary

This paper focuses on the influence of compressor frequency on the compressor efficiency, heating capacity, water outlet temperature and system COP. The results show that the compressor frequency mainly affects the mechanical efficiency of the compressor. The heating capacity and water outlet temperatures are affected by the CO2 mass flow rate and the water inlet temperature. The system COP has a peak value with increase of the discharge pressure and this peak is caused by the change of the enthalpy of the gas cooler outlet. In the experiment, the system's maximum water outlet temperature can rise to 80.5°C and the system COP can rise to approximately 5.1. To investigate the optimal discharge pressure, a dimensionless correlation equation is derived by analyzing the correlation and experimental data with the Buckingham PI theorem. The maximum relative error between the correlation equation and the experimental data under different working conditions is 3%.

Available documents

Format PDF

Pages: 101-113

Available

  • Public price

    20 €

  • Member price*

    Free

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

Details

  • Original title: A study on the compressor frequency and optimal discharge pressure of the transcritical CO2 heat pump system.
  • Record ID : 30025491
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 99
  • Publication date: 2019/03
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2018.12.028

Links


See other articles in this issue (45)
See the source

Indexing