Updated:
Original:

Reefer Madness

During our first summer cruising full time aboard Que Tal, our Tayana 37, my husband, Dave, and I were convinced we needed a new cold box in the galley. The fridge compressor ran all the time, the lettuce always froze, and I could never find what I wanted.

During our first summer cruising full time aboard Que Tal, our Tayana 37, my husband, Dave, and I were convinced we needed a new cold box in the galley. The fridge compressor ran all the time, the lettuce always froze, and I could never find what I wanted. We even went so far as to get a quote for having a new cold box installed. But after talking with more experienced cruisers, though, we decided to put the new box on hold and try some of their suggestions. A few simple changes made all the difference in the world.

Think inside the box

If you have a big top-loading cold box like ours, you need to do some serious organizing. Your goal should be to ensure that you don’t have to keep the box open too long when you need something, that everything is kept at its proper temperature, and that the space is fully utilized.

First determine your priorities. Do you need ice in your drinks, or will “cold drinks” suffice? If your freezer is tiny, you may have to choose between ice and freezing meat. If you want plenty of cold drinks, you may have to eat more canned fruit, vegetables and meat. If fresh produce is important to you, there will be less room for other things.

Then, think about what needs to go where. The coldest part of the box is at the bottom, right under the cold plate, a good place for meat. The bottom is also good for drinks, not only to keep them cold, but to prevent them from falling onto fragile items. The warmest area is at the top, away from the cold plate, making it perfect for things like lettuce.

If you want to fine-tune which parts of the box are coldest, it’s easy to wall off sections. Rigid foam insulation works best, but a double layer of corrugated cardboard will do. Cut the material to size to make a wall between the “cold” and “cool” sections of your box and then duct tape it in place. The side with the cold plate will be quite cold, possibly freezing, and the other side much less so. You can adjust the relative temperatures by making holes in the divider so more cold air passes to the cool side. Don’t cut too many holes all at once, as it takes about a day for the relative temperature difference to establish itself.





Organize your fridge's contents in containers so as to use the space efficiently. You can add a wall of foam to create different temperature zones.

Next you should group items together in containers to ensure that foods stay in their proper temperature areas, that fragile foods are protected, and that you’ll be able to find things quickly. Covered containers work well for things like lettuce and tomatoes that you don’t want squished. Otherwise, I like containers with open tops for easy access, solid bottoms in case anything leaks, and ventilation holes in the sides. It may take some trial and error to come up with the best container sizes and to figure out how they should be placed in your box, but in the long run containers pay huge dividends. Your food will stay fresh longer and you’ll find what you need much faster, which will save you both frustration and electrical power.

Improving Efficiency

We did three things–each costing

nothing but a bit of time–that significantly improved our refrigerator’s

operating efficiency and reduced its power consumption.



Simply plugging the drain in our cold box reduced the fridge cycling time by 20%

Stop the Drain

If your refrigerator has a drain to the bilge, make sure this drain has a stopper or a trap in it. Otherwise, since hot air rises and cold air sinks, all that lovely cold air from your fridge will go straight into the bilge instead of chilling your food. The drain in the bottom of our cold box turned out to be our single biggest problem. Five minutes of work and a wine cork trimmed to size cut the time that our refrigerator ran by about 20 percent. Just make sure you can remove the stopper when you defrost and want to drain melt water.

Defrost Often

As ice (as opposed to frost) builds up on the cold plate or evaporator box, it actually insulates it, preventing it from chilling the contents of your cold box. Defrost whenever there is a ¼-inch buildup. Aboard Que Tal we defrost our cold box about once a month.

Clean Air Vents and Condenser Coils

A refrigerator works by transferring heat from inside the box to the outside, dissipating heat through its condenser coils. A condenser works best with lots of fresh cool air around it. All too often a boat’s condenser will be hidden away in some poorly ventilated locker. Keep air vents free of dust or other obstructions and vacuum the condenser coils monthly.



We hang a reflector over our hull where the cold box is located to help keep it cool.

Add More Insulation

You can further increase your fridge’s efficiency by adding more insulation, something that can be done without rebuilding the box. Each of the following tricks will make a noticeable difference.

Auto Windshield Reflectors

These are cheap and easy to work with. If the sun hits your cold box directly, cut a windshield reflector to size and tape it around the affected area. Keep the silver side out, and your box will stay much cooler. If your box is against the hull, you can also hang a reflector from the toerail to shade the corresponding area of your boat’s topsides. We made a Sunbrella “envelope” with grommets for our “hull reflector” so that it wouldn’t tear apart in wind.

Counter Mat

If the counter over your box feels cool to the touch, a counter mat will add extra insulation to the top of the box and help seal any air gaps around the lid. Get a closed-cell foam exercise mat­—3/8-inch thick with a smooth surface works best—and cut it to size. With a smooth surface, you can still use the area for food prep, and it’s easy to wipe down.

Interior Insulation

Sheets of rigid foam are a quick and easy way to add 1/2-inch to 2 inches of insulation to the inside of your box. (Thinner sheets are good on curved surfaces.) Cut the sheets to size and use silicone caulk to tack them in place. Don’t use the foam on the bottom or the bottom few inches of the walls, where water and spills will collect. Even if you don’t have room on the sidewalls, lining the top of the box and the bottom of the lid will cut down on energy consumption.

Spray Foam

If you have uninsulated voids around your box, you can drill holes in the surrounding joinery and use cans of spray foam to fill them. Spray foam can make a huge mess as it expands, so plan carefully before pulling the trigger. Nonetheless, it’s easier than tearing apart the galley and building a new box.

All in all, it only took us only a couple of days to reorganize our cold box, improve air flow to the compressor, put a stopper in the drain, defrost the cold plate and add some insulation. The total cost was under $150, with plastic bins being the largest single expense. Our improvements gave us 80 percent or more of the benefits of a new cold box, but cost us far less money and time.

Related

211007MINI_1208-2400x1600

Mini Transat: Bouroullec and Fink Win Leg One

The Mini Transat is a roughly 4000-mile course that comprises two legs— Les Sables D’Olonne, France to Santa Cruz de La Palma in the Canaries, and Santa Cruz de La Palma to the French Caribbean island Guadeloupe. Two fleets of Mini 6.50s compete—the Production class in ...read more

01-LEAD-7-1-Rhiannon-loaded-on-the-truck-with-Clark,-Andre,-and-Louis

Book Excerpt: Taken By The Wind

In 1975, as a senior at Harvard, the question for Chicago-area sailor Mike Jacker became what to do next. The answer, as related in his new book Taken by the Wind, was to make a small-boat voyage to Tahiti with his grade-school friend Louis Gordon and Harvard classmate Clark ...read more

Maserati _Arthur Daniel

The RORC Caribbean 600 is Back

With a start planned for February 21 in Antigua, the famed 600-mile Caribbean race is back. The course circumnavigates 11 Caribbean islands starting from English Harbour, Antigua, and heading north to St Maarten and south to Guadeloupe, passing Barbuda, Nevis, St Kitts, Saba and ...read more

01-LEAD-14_00_210613_TORE03_JRE_4266_16961-3000x3000

The Ocean Race Europe

The fully crewed, round-the-world Ocean Race has experienced tremendous change over the years. From the 1993 transition to a one-design fleet to an ever-shifting route, what began as the amateur Whitbread Round the World Yacht Regatta in 1972 is a very different race today. The ...read more

01-LEAD-m'19.07.17_Sail-Stowing_3

Sail Inventories for Ocean Racing

We’re currently outfitting and refitting our Swan 59, Icebear, for the upcoming, round-the-world Ocean Globe Race (OGR, oceangloberace.com) in 2023, a reenactment of the early Whitbread races. In 1985, Nautor’s Swan placed a “factory” entry into the Whitbread, Fazer Finland, a ...read more

Screen-Shot-2021-10-01-at-10.28.25-AM

VIDEO: Sailing Drones to Gather Hurricane Data

NOAA and Saildrone Inc. have teamed up to pilot five new saildrones in the Atlantic to gather data that will improve the understanding of hurricanes. Yesterday SD1045, one of the sail-powered data collection bots, got a look at Hurricane Sam, a category 4 hurricane currently off ...read more

Sail-Fall-2

A Series of Unfortunate Events in the South Pacific

There is something almost mystical and more than a little eerie about scuba diving in the deep ocean, hundreds of miles from land and a mile from the bottom. You are surrounded by blue, all shades of blue, vanishing into deep black as you look down. No fish, no coral, just ...read more

download

New Zealand and Columbia Win 12 Metre North American Championship

The one word to sum up the 2021 12 Metre North American Championship is “variety.” Over three days, the eight-boat fleet saw everything from postponement due to a squall to an early start to capitalize on a scant 5-8 knots before being becalmed. “If you would have said last ...read more