According to French media, researchers today said that water evaporation - the process of drying washed clothes and providing rainwater to the cloud - may one day generate large amounts of clean energy.
According to AFP’s report on September 26, they wrote in the British magazine “Nature and Communications†that using this natural process, 325 gigawatts of electricity can be generated through existing lakes and reservoirs in the United States. This is roughly equivalent to 2015. 70% of the U.S. electricity generation.
There is only one problem: the technology to obtain these powers does not yet exist.
One of the study's authors, Ozgur Sahin of Columbia University, said: “In order to obtain this energy, you need to place a device on the air-water interface. The water from the water body will enter this equipment first, and then To reach the atmosphere, we must develop related technologies."
In the study, Sahin and a team used a model of the potential for water evaporation. During the evaporation process, liquid water turns into water vapor. They examined the effects of humidity, wind speed, and temperature on the evaporation rate. Therefore, they suspect that they will use some devices to capture the energy produced. Then, the scientists calculated that in addition to the Great Lakes, the evaporation potential of the U.S. water body exceeds 100,000 square meters.
According to the report, energy harvesting equipment can be built on the natural action of spores. Spores are microscopic structures that bacteria develop in response to harsh environments. Spores can withstand drought or severe cold, creating new bacteria as the environment improves.
Sahin said: “When the relative humidity of the surrounding air changes, the protective outer layer of the spores can absorb or release water. When the humidity is high, they absorb water and expand. When the humidity is low, they release water and shrink. In the process, They act like muscles."
In theory, spores can be integrated into materials when the humidity level changes - such as during evaporation, these materials generate energy.
Sahin said: “We have made some proof-of-concept devices using spores. These devices generate electricity when placed on water. These devices contain plastic strips with spores on the surface. As the humidity changes, these plastic strips become longer. Or shorten it."
He said: "We will connect the generator with a generator at the active end of these plastic strips. The generator will generate electricity."
The team said that the dam or the lake itself can be used to store the sun's heat, and the sun's heat will promote evaporation, so that electricity can be generated only when needed.
The team said that water is a wonderful heat storage, perhaps it can solve the problem of "intermittent" energy - turbines or solar panels generate electricity only when there is wind or sun.
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