Power transmission through space

In summary, the conversation discusses the feasibility of transmitting power from a source in space to Earth and converting it to usable power. The idea of using light, specifically a laser, as a narrow beam is mentioned, as well as the use of intermediaries like satellites. The use of a device called a rectenna, which converts microwaves to DC power, is also mentioned. However, the cost and potential danger involved in launching materials and maintaining the beam are major concerns.
  • #1
moejoe15
8
0
If we had a source of power in space at some distance is there any feasible way it could be transmitted to the Earth and converted to usable power here? Assume an almost unlimited source that can be converted to anywhere in the EM spectrum so efficiency is desirable but not required.

The only thing that comes to my mind is light. Maybe a laser because it can be a relatively narrow beam. Intermediaries like satellites are ok too.
 
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  • #2
There is a device called a rectenna, it converts microwaves to DC power. In the late 70s it was proposed to use the space shuttle to build large satellites that would use photovoltaics to power a microwave beam to the ground based rectenna.

Supposedly the plan was efficient enough to be considered practical, but the expense of launching all the materials was and still is a deal killer.
 
  • #3
Also, extremely dangerous if I recall. The concern was that you've basically got a microwave beam pointed at the Earth.

If anything gets it in its way, or if the beam for some reason gets off-track, well, it being "hot enough to fry eggs on a sidewalk" would cease to be hyperbole.
 

1. How is power transmitted through space?

Power transmission through space is achieved through the use of electromagnetic waves. These waves can travel through the vacuum of space and can be harnessed to transfer energy from one point to another.

2. What types of devices are used for power transmission through space?

The most common devices used for power transmission through space are antennas and satellites. Antennas are used to transmit and receive electromagnetic waves, while satellites are used to amplify and redirect these waves to a desired location.

3. Is power transmission through space safe for humans?

Yes, power transmission through space is generally considered safe for humans. The electromagnetic waves used for transmission are non-ionizing, meaning they do not have enough energy to cause any harm to living organisms.

4. What are the advantages of power transmission through space?

Power transmission through space has several advantages, including the ability to transmit power over long distances without the need for physical infrastructure, such as power lines. It also allows for more efficient use of renewable energy sources, as power can be transmitted from areas with abundant natural resources to areas with high demand.

5. Are there any potential drawbacks or challenges associated with power transmission through space?

One potential drawback of power transmission through space is the loss of energy during transmission. The farther the distance between the transmitting and receiving points, the more energy is lost. Additionally, there may be concerns about the potential impact of electromagnetic waves on wildlife and the environment.

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