SUPERMARKET REFRIGERATION
risk. A study designed to determine just that, published in 2013 in the International Journal of Refrigeration, measured the risk of a fire posed by the use of ice cream freezers using R290. The study found that the chance of ignition is less than 0.001%.
Another study of more than two million ice cream freezers being used in the field confirmed that equipment using R290 show no change in safety, reliability, or performance over traditional equipment.
Contributing to this low risk is the relatively small volume of propane actually needed to act as a refrigerant in these machines, which is less than half that required in HFC equipment to achieve the same levels of performance.
That lower volume also means lower pressures inside the system, and can also bring a reduction in noise, heat rejection, and energy consumption as well as the wear and tear on refrigeration components.
More than 1.5 billion HC refrigerators and freezers are already being used in homes worldwide, and they’ve been used in Europe for more than 20 years. The Environmental Protection Agency approved its use in the US in 2011, and there are UL and ANSI/ASHRAE
standards in place to regulate its use in commercial foodservice equipment. With its global warming potential (GWP = 3) is well below the global threshold of 150 GWP, which places it in an elite class of refrigerants from the standpoint of minimal environmental impact. And, its high-efficiency characteristics also qualify it as a candidate for meeting the Department of Energy’s (DOE) energy reduction rules that will soon be phased in.
While the recent refrigerant phase downs may have cleared the way for wider R290 adoption, there’s no telling if a new class of acceptable alternatives could push R290 out of the picture again.
New mildly flammable A2Ls such as HFO-1234yf offer similar performance and environmental characteristics.
These continue to be tested and it remains to be seen if the industry and the public will embrace R290 as a viable natural alternative, or if the analysis taking place throughout the industry is leaning in its favour.
No doubt, there are numerous business models and cases with specific benefit being developed; R290’s ability to satisfy these criteria will determine its level of adoption.
Genova MCT Pastorfrigor has spent three years
engineering its Genova MCT Chiller before releasing it at Euro shop this year, this uses the patented Micro channel evaporator and with a very low refrigerant charge of R290 (150grams), also ensuring that it is built safely and efficiently to use the new refrigerant.
This redesigned model features:
■ Faster pull-down times due to R290’s quick heat absorption.
■ Last longer because the lower pressure in the system versus traditional systems so less wear and tear.
■ Low energy costs-affordable running costs
■ Less heat ■ Quiet, less than 52Db.
All these features are all being made available with no price increase.
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October 2017 37
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