There has long been a debate about air cooling versus water cooling for marine refrigeration systems. Water cooling has traditionally been generally accepted to be between 25% and 35% more efficient in warm/hot ambient conditions, but some of that efficiency gain has to be offset by the energy required to run a water pump.
The Frigoboat Keel Cooled system is water cooled and does a fantastic job without the need for a fan or a pump. That will be mentioned later, but the following compares air cooled systems to traditional water cooled systems using sea water with a pump.
Many boaters these days seem to be opting for air cooled refrigeration systems even though they’re heading south into hot climates, and despite the notion that air cooled is inherently less efficient than water cooled. Why is that?
Walking through the gaudy and gay Miami Bayside entertainment area during the Miami Strictly Sail show last week, whilst dodging obstacles such as parrot-wielding hawkers and perfume swatch pushers, I spotted a sign promoting a bar/restaurant called “Mangoes”. This, reinforced recently by the sight of them on a supermarket shelf, reminded me that if I ever go back to St. Lucia, I have been promised free mangoes there for life.
When this mailing goes out we will be exhibiting at the Miami Strictly Sail, which is part of the mega Miami International Boat Show. Now don’t go thinking that we do this just to buff up on the tan during a bleak Maryland winter, oh no. No, this is purgatory. This is some form of evil punishment hoisted on us, probably for being so slack and slovenly during the slow winter sales season. Our German suppliers refer to boat shows as “fairs”, which to me conjures up images of riding prettily painted uppy-downy horses on a glittering merry-go-round while eating cotton candy, but sadly that is mere fantasy. OK, so it is nice to get away from the office, pull on a pair of shorts and give the old pins an airing, but “doing” these shows is expensive, takes a lot of organizing and planning, and they are physically and mentally exhausting.