Taking energy from the atmosphere

In summary, Russ believes that it is possible to capture the thermal energy in the atmosphere and use it to power our homes. He says that this would require an area closer to the size of the lot or larger, and that with high efficiency homes at a low latitude, the use of PV solar cells and infrared hot water heaters can capture more energy in a day than it uses.
  • #1
heartless
220
2
Our atmosphere is continously being heated and energized by the sun. Has anyone ever actually developed an engine able to take this energy directly from the atmosphere or if not, why nobody was able yet to make one?
 
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  • #2
We have solar cells that take sunlight and convert it to electricity.

We have windmills that take wind and convert it to electricity.
 
  • #3
yeah, but solar cells are actually taking energy from the sun light, but traveling through Earth's atmosphere sun light will leave a lot of energy in the atmosphere I suppose. If a person gets energy directly from the upper atmosphere one gains much more free energy. Such energy could be more effective than direct sun light. And windmills, they work using wind (oh, what the knowledge :rofl: ) and it cannot be accessible from every place of the world at any time. Sun for example always lights.
 
  • #4
Energy is only accessible if it is in motion from a source to a sink. So warm atmosphere sitting still does not provide a source of energy. Wind is thermal energy in motion and is the closest you can get to what you suggest.
 
  • #5
Of course it's possible to directly extract the thermal energy in the atmosphere. Just set up a stirling engine with its warm piston in the atmosphere and the cold piston in a bucket of ice.

Just go figure why most people aren't doing this as we speak...
 
  • #6
Since the ground level is warmer than high altitude I would put the hot piston on the ground and the cold one at high altitude. In fact weather does exactly this.
 
  • #7
Given the much higher density of water, using the wind-driven waves on the oceans as a source of energy seems to be a much less expensive solution than capturing the wind itself. Of course, there's just those pesky problems of building something large-scale in a very hostile environment...

Russ's point is spot on: If you could store the energy somehow (forget the atmosphere and let's say you just use the infrared spectrum of the sunlight on a black surface to heat water) then you could extract some of that energy as you discharge it back into the atmosphere.

Now, how about efficiency? With such a small temperature differential, you're not going to get much energy per unit of area. Even with nuclear reactors or a gasoline engine in a car or a river dam with a hydroelectric plant, the larger the differential the easier it is to increase efficiency.

So to power a typical home, you'd need an area closer to the size of the lot or larger. With a high efficiency home at a low lattitude, the use of PV solar cells and infrared hot water heaters (to use in showers) can capture more energy in a day than it uses. As long as you can handle paying $.25-35 per kWh of electricity, this is a reality today.
 
  • #8
gschjetne said:
Of course it's possible to directly extract the thermal energy in the atmosphere. Just set up a stirling engine with its warm piston in the atmosphere and the cold piston in a bucket of ice.

Just go figure why most people aren't doing this as we speak...
I hope that was sarcastic, but can't really tell...where does the ice come from?
 
  • #9
Your freezer! Just use a generator connected to the stirling to power the freezer. Then you get free energy! (Yes, that was sarcastic :rolleyes:)

Anyway, the point is that you always need some kind of difference to convert energy from one form to another. A heat engine needs a temperature difference, a wind generator needs a pressure difference, a hydro plant needs a gravitational potential difference, an electric heater needs a potential difference.
 
  • #10
In the novel Atlas Shrugged , John Galt invented a motor that ran on the electric charge in the atmosphere , I suppose a kind of static electricity accumulator.

Lightning occurs when this static charge concentrates in clouds and a diiference in potential exists between the cloud and the earth.

On a smaller scale can we accomplish this task artificially , and what might its output in work be ?
 
  • #11
Lightning has been considered. There's an http://peswiki.com/index.php/Directory:Lightning_Power#Harnessing_Lightning_Power"about it that says:
How hard would it be to build a power plant that harnesses the electricity generated by lightning? Then, store the electricity and use it on-demand on the electric grid? Pie-In-The-Sky?

This concept is perhaps not as impractical as it once was. The main limiting factor of implementing a lightning capturing scheme such as this was the inability to be able to store large amounts of electricity for later use. However, new Utility Scale Battery technology or other energy storage technologies such as Flywheels or Capacitors could be used to store the electricity captured from lightning in massive quanties, for later grid use.
I wonder how much hydrogen could be produced by electrolysis of water from a single lightning strike. I seem to remember that being looked at once.
 
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  • #12
I don't think that 30 degree C air really has that much energy available. Like mentioned, the solar cells are likely the most efficiant way to convert the sun energy.
 

What is meant by "taking energy from the atmosphere"?

"Taking energy from the atmosphere" refers to the process of harnessing and utilizing the energy present in the Earth's atmosphere. This can include techniques such as wind power, solar power, and geothermal energy.

What are the benefits of taking energy from the atmosphere?

Taking energy from the atmosphere can have numerous benefits, including reducing reliance on non-renewable energy sources, reducing carbon emissions and air pollution, and promoting energy independence.

How is energy taken from the atmosphere?

Energy can be taken from the atmosphere through various methods, such as wind turbines, solar panels, and heat pumps. These technologies use natural resources like wind, sunlight, and heat to generate electricity or heat energy.

What are the challenges of taking energy from the atmosphere?

One of the main challenges of taking energy from the atmosphere is the variability of natural resources like wind and sunlight. This can make it difficult to consistently generate energy. Additionally, the initial costs of implementing these technologies can be high.

What is the future of taking energy from the atmosphere?

The future of taking energy from the atmosphere looks promising, as advancements in technology and decreasing costs are making it more accessible. It has the potential to play a significant role in reducing our dependence on fossil fuels and mitigating the effects of climate change.

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