Kelvin water dropper generator

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Discussion Overview

The discussion centers around the Kelvin water dropper generator and its potential for electricity production on a mass scale. Participants explore the efficiency of converting gravitational potential energy into electric potential energy compared to traditional hydroelectric systems, as well as the nature of the energy produced by the Kelvin water dropper.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • Rooted questions whether the Kelvin water dropper can produce electricity on a mass scale and compares its efficiency to hydroelectric turbines, suggesting that the discrete nature of the potential difference might play a role.
  • Some participants, like mfb, express skepticism about the efficiency and flow rate of the Kelvin water dropper, indicating that the energy loss from impact is significant and that a large volume of water would be necessary for useful power generation.
  • Bobbywhy clarifies that the purpose of the Kelvin water dropper is not to generate electric power but rather to create a high voltage potential, noting that the actual power output is minimal and not suitable for practical applications.
  • Rooted acknowledges the points raised about energy loss from impact and expresses a need for further contemplation on the topic.

Areas of Agreement / Disagreement

Participants generally express skepticism about the practicality of the Kelvin water dropper for mass electricity production, with multiple competing views on its efficiency and purpose. The discussion remains unresolved regarding its potential applications.

Contextual Notes

Participants highlight the differences between hydroelectric power generation and the Kelvin water dropper, noting limitations in the latter's ability to produce significant electrical power. The discussion also touches on the energy losses involved in the operation of the Kelvin water dropper.

Rooted
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I have only recently found out about this idea (many thanks m.e.t.a.) and I am curious about it. Could it be used to produce electricity on a mass scale, and if not, why not? Is the efficiency of conversion from gravitational potential energy into electric potential energy less that the conversion to kinetic energy in a hydroelectric turbine, for example? Or is it perhaps related to the discrete rather than continuous nature of the high potential difference?

Thanks for your help,

Rooted
 
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I would expect that both the efficiency and the maximal flow rate (a small stream per device) are too small to be useful.
You need several cubic meters per second to get any useful amount of power (with 100m height difference, 1m^3/s just corresponds to 100kW input power)

Wikipedia said:
Most of the energy is wasted as heat when the water drops land in the buckets.
 
Thanks mfb. The energy loss from impact is something I hadn't taken on board.
 
Rooted said:
Thanks mfb. The energy loss from impact is something I hadn't taken on board.

I don't think there is a minimum to this loss, since the electric field between the ring and the bucket will counteract gravity, so the drops could theoretically hit the water with zero speed.
 
Please pay attention to two very different kinds of apparatus: Hydroelectric power generators and Kelvin Water-drop generators.

Here are a few excerpts from the Wikipedia page on “hydroelectric generator”:

“Hydroelectric generators are found world-wide. In China the Three Gorges Dam generates 20,300 Megawatts and in the USA the Grand Coulee Dam generates 6,809 Megawatts.

Pico hydro is a term used for hydroelectric power generation of under 5 KW. It is useful in small, remote communities that require only a small amount of electricity. For example, to power one or two fluorescent light bulbs and a TV or radio for a few homes.[13]

Even smaller turbines of 200-300W may power a single home in a developing country with a drop of only 1 m (3 ft). Pico-hydro setups typically are run-of-the-river, meaning that dams are not used, but rather pipes divert some of the flow, drop this down a gradient, and through the turbine before returning it to the stream.”
http://en.wikipedia.org/wiki/Hydroelectricity

The purpose of the water-dropper is not to generate electric power. A Kelvin Water-drop generator generates a high voltage potential between its two electrodes. They may be buckets or spheres, but there is no significant amount of electrical power stored on the electrodes. A fully charged sphere, for example, may cause a few micro-amperes to flow during a short-circuit arc for a few microseconds. This is not a significant amount of power and would not power a load.

Cheers,
Bobbywhy
 
Thanks for your help. I need to think about this a bit more!

Cheers, Rooted
 

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