Any mention of free energy immediately attracts attention and you don't get nothin' for nothin' but this looks exceptionally low cost.
The southern and western United States have the greatest capacity to produce evaporation-generated power from lakes and reservoirs, a new study in Nature Communications finds.
Credit: Columbia University
In the first evaluation of evaporation as a renewable energy source, researchers at Columbia University find that U.S. lakes and reservoirs could generate 325 gigawatts of power, nearly 70 percent of what the United States currently produces.
Though still limited to experiments in the lab, evaporation-harvested power could in principle be made on demand, day or night, overcoming the intermittency problems plaguing solar and wind energy. The researchers' calculations are outlined in the Sept. issue of Nature Communications.
"We have the technology to harness energy from wind, water and the sun, but evaporation is just as powerful," says the study's senior author Ozgur Sahin, a biophysicist at Columbia. "We can now put a number on its potential."
Science Daily: Energy harvested from evaporation could power much of US
The value of that is an astounding amount of money so this warrants a whole lot of science.
Zen Yogi: I had not heard of this previously, Silas
I hadn't either, Yogi, but I like it already.
Evaporation is nature's way of cycling water between land and air. Sahin has previously shown how this basic process can be exploited to do work. One machine developed in his lab, the so-called Evaporation Engine, controls humidity with a shutter that opens and closes, prompting bacterial spores to expand and contract. The spores' contractions are transferred to a generator that makes electricity. The current study was designed to test how much power this process could theoretically produce.
- SD
There's no need to pretend to know how that works but they're doing the research to prove it so we're hanging with them.
Here's another high-dollar value in this technique.
"Evaporation comes with a natural battery," said study lead author, Ahmet-Hamdi Cavusoglu, a graduate student at Columbia. "You can make it your main source of power and draw on solar and wind when they're available." Evaporation technology can also save water. In the study, researchers estimate that half of the water that evaporates naturally from lakes and reservoirs into the atmosphere could be saved during the energy-harvesting process. In their model, that came to 25 trillion gallons a year, or about a fifth of the water Americans consume.
- SD
Here's the background on their research model to explain their design.
States with growing populations and sunnier weather can best capitalize on evaporation's capacity to generate power and reduce water waste, in part because evaporation packs more energy in warm and dry conditions, the researchers say. Drought-prone California, Nevada and Arizona could benefit most.
The researchers simplified their model in several ways to test evaporation's potential. They limited their calculations to the United States, where weather station data are readily accessible, and excluded prime locations such as farmland, rivers, the Great Lakes, and coastlines, to limit errors associated with modeling more complex interactions. They also made the assumption that technology to harvest energy from evaporation efficiently is fully developed.
- SD
Since you know the technology is not fully developed, that last statement may seem to leave the research without value but they must assume the technology exists to do this or their calculations won't work.
The researchers are moving aggressively forward with this.
Klaus Lackner, a physicist at Arizona State University who was not involved in the study, expressed support for the team's findings. Lackner is developing artificial trees that draw carbon dioxide from the air, in part, by harnessing the power of evaporation.
"Evaporation has the potential to do a lot of work," he said. "It's nice to see that drying and wetting cycles can also be used to collect mechanical energy."
The researchers are working to improve the energy efficiency of their spore-studded materials and hope to eventually test their concept on a lake, reservoir, or even a greenhouse, where the technology could be used to simultaneously make power and limit water loss.
- SD
Mates, the Rockhouse is most interested in this one. The variable we're missing is how much it will cost to build the kit to perform the harvesting but we will be fascinated to learn. The approach is clean insofar as there are no apparent waste products. It doesn't have the liabilities of solar (i.e. poisonous chemicals in the solar cells) and it doesn't have the liabilities of wind turbines (i.e. due to their bird-killing ways).
Zen Yogi: Big Oil will hate it
Of course it will, Yogi, but the probability Big Oil can present a better value is extremely low. The only way Big Oil can stop this is through artificial interference but you will be watching, won't you.
Booboo: I will, Silas. This can save me from giving away too much of my hard-earned jingle jack so I will watch closely.
Good for you, Booboo. It appears easily possible there is great goodness in this, mate.
The southern and western United States have the greatest capacity to produce evaporation-generated power from lakes and reservoirs, a new study in Nature Communications finds.
Credit: Columbia University
In the first evaluation of evaporation as a renewable energy source, researchers at Columbia University find that U.S. lakes and reservoirs could generate 325 gigawatts of power, nearly 70 percent of what the United States currently produces.
Though still limited to experiments in the lab, evaporation-harvested power could in principle be made on demand, day or night, overcoming the intermittency problems plaguing solar and wind energy. The researchers' calculations are outlined in the Sept. issue of Nature Communications.
"We have the technology to harness energy from wind, water and the sun, but evaporation is just as powerful," says the study's senior author Ozgur Sahin, a biophysicist at Columbia. "We can now put a number on its potential."
Science Daily: Energy harvested from evaporation could power much of US
The value of that is an astounding amount of money so this warrants a whole lot of science.
Zen Yogi: I had not heard of this previously, Silas
I hadn't either, Yogi, but I like it already.
Evaporation is nature's way of cycling water between land and air. Sahin has previously shown how this basic process can be exploited to do work. One machine developed in his lab, the so-called Evaporation Engine, controls humidity with a shutter that opens and closes, prompting bacterial spores to expand and contract. The spores' contractions are transferred to a generator that makes electricity. The current study was designed to test how much power this process could theoretically produce.
- SD
There's no need to pretend to know how that works but they're doing the research to prove it so we're hanging with them.
Here's another high-dollar value in this technique.
"Evaporation comes with a natural battery," said study lead author, Ahmet-Hamdi Cavusoglu, a graduate student at Columbia. "You can make it your main source of power and draw on solar and wind when they're available." Evaporation technology can also save water. In the study, researchers estimate that half of the water that evaporates naturally from lakes and reservoirs into the atmosphere could be saved during the energy-harvesting process. In their model, that came to 25 trillion gallons a year, or about a fifth of the water Americans consume.
- SD
Here's the background on their research model to explain their design.
States with growing populations and sunnier weather can best capitalize on evaporation's capacity to generate power and reduce water waste, in part because evaporation packs more energy in warm and dry conditions, the researchers say. Drought-prone California, Nevada and Arizona could benefit most.
The researchers simplified their model in several ways to test evaporation's potential. They limited their calculations to the United States, where weather station data are readily accessible, and excluded prime locations such as farmland, rivers, the Great Lakes, and coastlines, to limit errors associated with modeling more complex interactions. They also made the assumption that technology to harvest energy from evaporation efficiently is fully developed.
- SD
Since you know the technology is not fully developed, that last statement may seem to leave the research without value but they must assume the technology exists to do this or their calculations won't work.
The researchers are moving aggressively forward with this.
Klaus Lackner, a physicist at Arizona State University who was not involved in the study, expressed support for the team's findings. Lackner is developing artificial trees that draw carbon dioxide from the air, in part, by harnessing the power of evaporation.
"Evaporation has the potential to do a lot of work," he said. "It's nice to see that drying and wetting cycles can also be used to collect mechanical energy."
The researchers are working to improve the energy efficiency of their spore-studded materials and hope to eventually test their concept on a lake, reservoir, or even a greenhouse, where the technology could be used to simultaneously make power and limit water loss.
- SD
Mates, the Rockhouse is most interested in this one. The variable we're missing is how much it will cost to build the kit to perform the harvesting but we will be fascinated to learn. The approach is clean insofar as there are no apparent waste products. It doesn't have the liabilities of solar (i.e. poisonous chemicals in the solar cells) and it doesn't have the liabilities of wind turbines (i.e. due to their bird-killing ways).
Zen Yogi: Big Oil will hate it
Of course it will, Yogi, but the probability Big Oil can present a better value is extremely low. The only way Big Oil can stop this is through artificial interference but you will be watching, won't you.
Booboo: I will, Silas. This can save me from giving away too much of my hard-earned jingle jack so I will watch closely.
Good for you, Booboo. It appears easily possible there is great goodness in this, mate.
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