Sponsored by


all these improvements together will undoubtedly yield a significant cost saving for the customer and a lower impact on the environment. An example of a heat exchanger with reduced tube sizes would be one used in the Marstair ’17 series’ R407C Cellar Cooler. These units, which use re-engineered smaller tubed heat exchangers, are a real- world example with the average refrigerant reduction across the entire range being 35% when compared with previous models. The Marstair ’17 series’ MRC+ refrigeration condensing unit is another example. Here, the most popular MRC+45-80 range saves 0.5kg of refrigerant per unit. This represents an instant cost saving and will help distributors fulfil the reduction in GWP quota required by the F-Gas regulations. Taking things further, it is generally believed that in the UK the market for cellar cooler units is approximately 5000 systems per annum. If we assumed the average refrigerant charge to be 2kg per unit, and extrapolated the expected saving over the projected amount of new installs, the saving would be 3500kg of refrigerant per annum. Assuming the most common refrigerant used in cellar coolers is R407C with a GWP of 1774 as a baseline, the expected saving would be equivalent to 6.2 million kg of CO2


. In conclusion, the challenge


presented by the F-Gas quota is huge and it cannot be just the responsibility of the refrigerant manufacturers to develop new refrigerants with lower and lower GWPs to meet the current and future quotas. Other developments will be needed within the industry, with smaller tubed heat exchangers just one example. While further innovations are certainly required, the introduction of F-Gas has given a development direction for the whole industry which has, so far, proven to be more than up for the challenge.


HEAT EXCHANGERS


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