A British refrigerated display cabinets manufacturer has decided to replace R404A models with a new more efficient versions using R407F.
While the new models are initially only an option, the manufacturer plans to completely replace R404A in its range of open-chill and glass-door cabinets with R407F.
Besides energy savings that can reach 33 %, R407F was chosen because of its lower GWP (note) and its safety advantage over hydrocarbons.
For example, in glass-door cabinets, even a minor leak of hydrocarbon refrigerant cannot dissipate and a potentially explosive atmosphere could be created and persist. The resulting risk of ignition would therefore require strict safety rules to be followed, unlike the situation with an HFC.
According to the manufacturer, it would be very difficult to anticipate and satisfy safety requirements where hydrocarbons are used in glass-door cabinets.
Note : The GWP of R404A is 3,784, while R407F has a GWP of 1,705.
Source: Cooling Post