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A new structural optimization method for distributors in R290 air conditioner with small diameter copper tubes.

Number: pap. 1053

Author(s) : GAO Y., DING G., ZHENG Y., et al.

Summary

R290 (propane) is one of the most potential natural working fluids due to its zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP). However, the apply of R290 in air conditioner is inevitably limited because of its inflammability. The air conditioner with small diameter copper tubes can reduces refrigerant charge, ensuring the safety and reliability of R290 while increasing the flow paths can enlarges the risk of uneven distribution. Employing highperformance distributors ensures a uniform flow distribution for R290 room air conditioner (RAC). In this paper, a simulation-based structural optimization method has been investigated for distributor design, in which a mass flow distribution model has been verified and used for simulation. A new
prototype based on this method is developed and experimentally tested in an air conditioner using R290 and 5mm diameter tubes, comparing with the conventional one. It is shown that the new prototype improves energy efficiency ratio as much as 2.2% under small air flow rate mode and 2.7% under large air flow rate mode. The experimental results validate the optimization effect of the
structural method for distribution design in RAC.

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Pages: 8 p.

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Details

  • Original title: A new structural optimization method for distributors in R290 air conditioner with small diameter copper tubes.
  • Record ID : 30019136
  • Languages: English
  • Source: 12th IIR Gustav Lorentzen Conference on Natural Refrigerants (GL2016). Proceedings. Édimbourg, United Kingdom, August 21st-24th 2016.
  • Publication date: 2016/08/21
  • DOI: http://dx.doi.org/10.18462/iir.gl.2016.1053

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