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NEWS


ICS Cool Energy calls for careful refrigerant selection


I


CS Cool Energy is calling for refrigerant producers and component manufacturers to work together to establish the right balance between safety and operational performance. In light of F-Gas legislation requiring a reduction


in the use of HFC refrigerants and a move towards the use of refrigerants with lower global warming potential (GWP), selecting a suitable refrigerant has become an extremely complex task. The industry’s refrigerant options have been limited signifi cantly, particularly when other factors, such as volatility and operational effi ciency, are considered. Malcolm Edwards, technical manager at ICS Cool Energy, explained: “There is no off -the-shelf solution when it comes to refrigerants, particularly for low temperature applications, and companies face a careful balancing act between GWP, toxicity and fl ammability. For example, A2Ls, which meet the F-Gas legislation criteria of low GWP, are classed as mildly fl ammable, which obviously poses safety risks when it comes to their transportation and handling.


“Therefore, systems need to be designed in


line with refrigerant development, preferably without the need for special transport and storage arrangements or imposing severe commercial pressures. With more fl ammable refrigerants coming to the fore, the importance of safer logistics, better fi re-proofi ng, and keeping systems secure to prevent leakage is paramount. Refrigerants should be contained, recovered, and disposed of ethically.”


Mr Edwards continued: “What’s more, natural


refrigerants such as carbon dioxide (CO2) and ammonia (NH3), which have low GWP, won’t suit every application either. For example, ammonia provides high effi ciency and performance with low environmental impact. However, it has high toxicity, can be fl ammable, and is highly corrosive to copper, which is an issue for many semi-hermetic compressors which often rely on having electric motors with copper windings.


“Another issue is the encouraged use of drop-in refrigerants which don’t have GWP values under


150. Drop-in refrigerants are never 100 percent like- for-like and will therefore


compromise performance or energy


consumption. Systems often need altering before a drop-in refrigerant can be used, including changes to the expansion valve, additional liquid suction heat exchangers, or changing the oil to a diff erent type.”


Mr Edwards concluded: “There is no


straightforward answer when it comes to refrigerant choice, and with the market saturated with confl icting information, end users need to be aware of the compromises associated with hastily opting for low GWP and drop-in refrigerants. Only when refrigerant producers and system manufacturers work together can end users have peace of mind that their systems will operate effi ciently, safely and in an environmentally friendly manner.”


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ents:


lands: 01214 563156 01670 566243


December 2017 7


Daikin Applied


Air &


Daikin Applied, Your Specialist C


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Air Handling Units

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