Share

Recommended by the IIR / IIR document

Research on control method of a R290 ASHP under low-temperature heating condition.

Author(s) : DU Y., WU J., WANG C.

Type of article: IJR article

Summary

Due to the consensus on energy conservation and environmental protection in the international community, and considering the environmental protection and thermophysical properties, R290 has great advantages as an alternative working fluid compared with R22 in the field of air conditioner and heat pump. In the promotion process of the R290 air source heat pump (ASHP), the potential safety hazard caused by flammability can be controlled, but effective control methods are needed to ensure the reliability of the low-temperature heating process. In this paper, a new modified control strategy (MST) was proposed for R290 ASHP. The experimental results showed that the lubricating oil discharged from the compressor with MST was 10.55g less than the original control strategy (OST). In addition, when the temperature judgment condition for starting to adjust the opening of MST was 4°C, the performance was improved (using the MST) by about 1%. Whether from the point of view of reducing the discharge of lubricating oil from the compressor or the storage of refrigerant in the compressor and accumulator, the MST can effectively eliminate the oil blockage, thus improving the reliability of the heat pump system, while having beneficial impacts on the performance of the R290 heat pump.

Available documents

Format PDF

Pages: 60-68

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: Research on control method of a R290 ASHP under low-temperature heating condition.
  • Record ID : 30028694
  • Languages: English
  • Subject: Technology, HFCs alternatives
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 129
  • Publication date: 2021/09
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2021.04.026
  • Document available for consultation in the library of the IIR headquarters only.

Links


See other articles in this issue (32)
See the source

Indexing