Finding and Installing a Wind Turbine Aboard Your Yacht
- Author Michael Dickens
- Published September 2, 2011
- Word count 1,021
For some time I have been researching ways to create power without the help of my boat's generator. It does not take very long to use 100 hours of genset time, enough for another oil change. In the beginning it was a solar panel, and after that came an inverter, and now, the newest is a wind generator.
Wind has been used for creating energy for centuries; first in Persia (present-day Iran) as long ago as 200 B.C. Yet, the first acknowledged practical windmills were manufactured by the Dutch in 1300, by means of cloth sails pulled across wooden frames. In a number of styles these sails could be trimmed to take advantage of unpredictable wind speed surroundings. The large windmills of the Dutch model stayed in operation all across Europe until the launch of the steam engine in the 1800s. Wind is in reality a type of solar energy. Winds are triggered by the irregular warming of the atmosphere by the sun, the irregularities of the earth's surface, and spinning of the planet. Wind current patterns are created by the earth's terrain, areas of water, manmade structures and vegetation. We humans can use this wind flow for numerous reasons: sailing a boat, flying a kite, flying an airliner and even producing electrical power.
The phrase wind power describes the method by which the wind is utilized to produce mechanical power. This mechanical power may then be utilized for specific mechanical tasks such as chopping grain or pumping water. Or as used on a boat, an alternator in a wind generator can change this mechanical power into electrical energy.
So how do wind turbines create electricity? In simple terms, a wind generator works the opposite of a fan. As a substitute to using electricity to make wind, like a fan, wind generators utilize wind to make electricity. The wind turns the blades, which turn a shaft. The shaft attaches to an alternator and produces electricity. In our boat's turbine, the alternator produces 220 volt 3-phase AC current. The controller, converter, then changes the AC power to 12 volt DC power to charge the battery bank.
Wind Availability
When deciding if a wind generator is financially sensible for your vessel depends on the quality of your wind resources. Normally, regular wind speeds of a minimum of 10 mph are mandatory for a small wind generator to create adequate electrical energy to be cost-effective. Being on the Atlantic shoreline, we have afternoon sea breezes in the summer which normally generate 10-15 mph winds. If your yacht is inland, your winds will most likely be different. The most important element of gaging your wind resource is an anemometer. Anemometers are wind measuring units, usually designed with rotating cups installed on a vertical shaft. The anemometer will allow you to "read" the wind speeds. If there is another yacht owner with a wind turbine system in your neighborhood, you may be able to gain useful guidance from its owners concerning the electrical productivity of the system and wind speed data. Such information could be extremely useful as an option to mounting an anemometer.
Turbine Mounting
Deciding the place to mount your wind generator takes a bit of preparation. It has to be high enough to capture the wind, if possible away from arches, sails or masts that will block or alter wind flow. There is also the issue of rotating blades. We want to make certain that they do not strike anything while rotating, particularly a person's head while moving around the trawler.
I opted to use the factory designed pole kit that was designed for our generator. It provides a 3-point connection which also permits us to lay it down for servicing. It is powder coated anodized aluminum, with stainless steel brackets, made to withstand the tough marine setting.
My wind turbine is actually a hybrid system I created utilizing both wind power and solar power.
Being A Good Neighbor
Many people believe fervently about the desire to preserve the scenery and tranquility of their marinas. Anticipate several questions from your neighboring boats. Appreciate your neighbors' inborn worry of the new and be ready to reply to their worries. A few of the issues raised about wind generators are not true. Wind turbines are not, as many people believe, hazardous to birds. A shiny reflective window is more dangerous to birds than a small wind turbine. Wind turbines also have no potential to disrupt radio and television reception.
Wind Turbine Sound
Your neighbors' issues involving wind turbine racket are significant. No matter what the dimension of the wind turbine, the likelihood for turbine noise to trouble other individuals always exists. Even if a wind turbine does not emit enough sound to break any noise rules, the sound it creates may still be offensive to other people. Older generators were indeed noisy, but contemporary engineering has manufactured turbine blades that are nearly silent. Our turbine is about 3 feet in diameter and at 4 mph winds; the unit makes a light flutter. At 10 mph the unit produces no noise at all.
Wind Generator Advantages
-- Wind is free
-- Makes no waste or greenhouse gases
-- Does not usually get in the way of other boating activities
Wind Turbine Drawbacks
-- The wind is not always predictable - several days we have no wind at all
-- Several individuals believe that wind turbines wreck the lines of a vessel; I felt that way too in the beginning but have since altered my outlook
-- A few devices can be noisy. The small contemporary wind turbines used on vessels barely make any noise at all
How Much Power Do They Produce
Turbines can be purchased that make several energy outputs. The turbine that I chose is a Sunforce 450 watt turbine. It has a cut-in pace of 4 mph and has a survival wind speed capacity of 157 mph.
The amps (power) produced is:
-- 6 mph winds - 8.3 amps,
-- 10 mp winds - 25 amps
-- 14 mph winds - 58.3 amps
The machine has a built in brake that will go on automatically when the batteries are at full charge, or it can be manually set if preferred.
Mike Dickens, the author, is a live aboard boat owner and owner/Broker of Paradise Yachts in Florida USA.
Paradise Yachts offers used quality yachts to customers worldwide.
National and international sales. We ship Used Trawlers, Motor Yachts and Cruisers worldwide. Located in Florida, USA. 904/556-9431
Interact with us at the Trawler Blog
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