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IIR document

Two-phase refrigerant distribution of vertical header with insertion structure of branch pipe for multi type air conditioner.

Number: pap. n. 1320

Author(s) : ONAKA Y., MATSUMOTO T.

Summary

In order to reduce refrigerant charge, tube size of heat exchanger is reduced, the number of heat exchanger paths of refrigerants have increased. Therefore, the design technologies of vertical headers are recently getting strongly attention. Many researchers are now devoting their energies to develop vertical header for equal refrigerant distribution to improve evaporation performance of heat exchanger. Some header has been suggested for equal distribution. However, air flow rate is non-uniform in some multi type air conditioner system of out-door unit. In this study, a vertical header distributor of the new structure with the branch pipe inserted in the main pipe is installed in heat exchanger and applied to the out-door unit of the top flow type multi air conditioner for building. The evaporation performance of heat exchanger can be improved by about 10% is confirmed by experiment.

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Pages: 5

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Details

  • Original title: Two-phase refrigerant distribution of vertical header with insertion structure of branch pipe for multi type air conditioner.
  • Record ID : 30026099
  • Languages: English
  • Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Publication date: 2019/08/24
  • DOI: http://dx.doi.org/10.18462/iir.icr.2019.1320

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