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System soft-optimization tests of refrigerant R32 in a 6-ton rooftop packaged air-conditioner.

Author(s) : ABBADI M., KHAWALDEH M.

Type of monograph: Report

Summary

Tests in Saudi Arabia have indicated that, as well as having better performance, R32 might be compatible with existing R410A air conditioners in high ambients. Comparison tests were carried out under AHRI’s Low-GWP Alternative Refrigerants Evaluation Programme on a standard 21kW rooftop packaged air conditioner designed for R410A and manufactured by leading Saudi manufacturer Zamil. Tests using R32 in the same unit showed that the lower GWP refrigerant now being considered as a replacement for R410A in air conditioning systems exhibited higher capacity and performance at higher ambients. While both tests showed a capacity reduction at high ambients, R32 exhibited a capacity up to 16% higher than R410A. The energy efficiency ratio was also improved with R32 showing up to 10% improvement on R410A. However, R410A was shown to have a better integrated energy efficiency ratio (a measure of part-load performance) by 4% compared to R32. A negative characteristic of R32 is its comparatively high discharge temperature. At around 55ºC ambient, the R32 discharge temperature was found to be around 24.4°C higher than R410A but the POE oil, when tested, was not found to have suffered any negative effects from these elevated temperatures.

Details

  • Original title: System soft-optimization tests of refrigerant R32 in a 6-ton rooftop packaged air-conditioner.
  • Record ID : 30016417
  • Languages: English
  • Subject: Regulation, Environment
  • Publication: AHRI (Air-conditioning, Heating and Refrigeration Institute) - Saudi arabia/Saudi arabia
  • Publication date: 2015/09/08

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