Scientists have proposed a new method of producing renewable energy
According to scientists from Stanford University, the place where the salty ocean water mixed with fresh water, can be a source of huge volume of production of renewable energy, according to a press release published on the website of the University. The authors note the development that this energy technology can make treatment facilities coastal wastewater energy independence from other power sources. In addition, this kind of energy production does not cause any pollution to the environment.
As the water produces energy?
When fresh water from coastal treatment plants is mixed with the salt water, the electrochemical reaction takes place during which energy is produced during this process. This energy can be used, for example, to recharge the batteries.
According to scientists, one cubic meter of fresh water, mixing with the same amount of salt water is able to produce approximately 0, 65 kilowatt-hours of energy. This would be enough to power the average American home for about 30 minutes. On a larger scale, at the level of all coastal treatment plants, can produce about 18 gigawatts. And this, scientists say, is already enough to feed more than 1,700 homes for a year.
To test the technology, researchers have created from durable materials available and a new type of battery. Its operation is based on the idea of using the salt ions (sodium chloride). Once in the battery, first fresh water liberates ions of sodium and chlorine electrodes in a battery contained within a solution that directs current from one electrode to another. And when in the fresh water in the battery falls salt water, the battery is charging.
Researchers have tested a prototype of a new battery on one of California coastal treatment plants in Palo Alto (USA), where they are mixed and salty waste (fresh) water. 180 cycles of recharge battery components retained 97 percent capture efficiency of salt ions which are used for energy production.
The researchers note that a prototype battery output power is still low, but the increase in capacity of the battery is quite real. In addition, the scientists say that the battery itself are made from cheap materials and design of the system is very simple - no moving elements are not used in it, so it
Why do it?
The wastewater from a local treatment facilities coastal researchers tested their system is not just. The researchers said that in the United States on the treatment of wastewater spent about 3% of the total energy produced in the country.
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The new technology has the potential to allow the refuse on external energy sources such enterprises and use energy only produced at the expense of battery life.
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