PARTNER FOCUSFANS
■ Heat rejection capacity: testing under both subcritical and transcritical conditions
■Fan power consumption ■Air fl ow rate ■ For the sound measurement, the test standard EN 13487:2019-11 and EN ISO 9614-1:2009-11 was used for the determination of sound power levels.
To ensure impartiality and fair testing, Eurovent Certifi cation had no direct contact with the tested units. An independent Legal Offi cer (French Bailiff ) inspected the units on arrival at the distributor’s warehouse and undertook a second inspection when the units arrived at the laboratory. This ensured that the units tested were the same as those put forward in the off er. The Legal Offi cer was also present at the unpacking (to make sure both units arrived undamaged), and during the installation of the units on the test rig.
The results The results of the tested operating conditions displayed material deviations from declared performance under non-standard conditions: ■ Condition 4 produced the highest heat rejection underper- formance. The average underperformance was 51.5% for both units, and the maximum underperformance was 53%.
■ Condition 3 produced an average underperformance of 40% across both units and a maximum underperformance of 41%.
■ Condition 2 produced an average underperformance across both units of 35% and a maximum underperformance of 37%.
■ In addition, both units underperformed when operating as a condenser (subcritical) with an average deviation of 27.5% across both units and a maximum deviation of 32%.
Notably, the independent laboratory tests showed that actual measured performance under the tested operating
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conditions can exceed the shortfalls predicted by the design tool simulations.
Correction factors In addition, the laboratory tests validated the correction factors used by Eurovent Certifi cation to calculate performance at diff erent market conditions. Tested results had to be within a 15% tolerance of the values available within the Heat Exchangers Technical Certifi cation Rules to comply. Correction factors therefore provide a reliable method for calculating CO2
performance across diff erent climates. Conclusion
This case study highlights the potential gap between declared and measured performance of products without third- party verifi cation. The uncertifi ed gas coolers were found to have material deviations between declared and measured performance under the non-standard tested operating conditions. In contrast, Eurovent Certifi cation’s CO2
testing
test campaign builds on a previously released study on HFC air-cooled condensers, with the results from both studies used to simulate the impact of heat exchanger underperformance in a new white paper, Beyond the brochure: Exposing the reality of refrigeration product underperformance.
Download it now from:
www.eurovent-certifi
cation.com
m.nudd@eurovent-certifi
cation.com
protocol and correction factors were within the tolerance set out in the relevant Technical Certifi cation Rules, helping support transparent performance data for design and selection purposes. This CO2
"It was
critical for the research to follow an authentic customer journey. It was therefore decided to replicate a real-world experience by creating a project specifi cation which was submitted to independent distributors for an off er."
www.acr-news.com • June 2026 11
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