Temperature differences converted to electric...

[FreeEnergy]

First of all the question is why would you want to do it, and how low is the bottom temperature we are talking about.

Hans von Lieven

why? because I'd like to keep the bird running.

we are talking about the lowest (below zero) temperature possible that we can work with.

[hansvonlieven]

Theoretically you could use liquid carbon dioxide or even liquid nitrogen but there would not be much point. You could still get it to work though but only very very slowly.

Remember the device is a HEAT engine. it relies on a liquid that evaporates at ambient and re-condenses say about 5 degrees lower.

At very low temperatures you have very little heat to work with and processes slow down accordingly until you reach absolute zero, at which point all molecular movement stops.

Heat is molecular hysteresis. The more movement, the hotter it gets.

Hans von Lieven

[FreeEnergy]

Theoretically you could use liquid carbon dioxide or even liquid nitrogen but there would not be much point. You could still get it to work though but only very very slowly.

Remember the device is a HEAT engine. it relies on a liquid that evaporates at ambient and re-condenses say about 5 degrees lower.

At very low temperatures you have very little heat to work with and processes slow down accordingly until you reach absolute zero, at which point all molecular movement stops.

Heat is molecular hysteresis. The more movement, the hotter it gets.

Hans von Lieven

very nice thanks.

so lets say i scale up a drinking bird (about 7-9 feet tall) using carbon dioxide or even liquid nitrogen (in regular room temperature), would that power up a laptop or a even a light bulb?


peace


p.s. hope your relative is doing much better.

[hansvonlieven]

You could not use liquid nitrogen or liquid carbon dioxide at room temperature, you would need an enormous amount of energy to cool it down to a liquid again.

As I said, you need a liquid that evaporates at ambient (in this case room temperature) and condenses again to a liquid say 5 to 10 degrees lower.

Hans von Lieven

and yes, she is getting better, probably able to go home next week. Thanks for asking.

[FreeEnergy]

You could not use liquid nitrogen or liquid carbon dioxide at room temperature, you would need an enormous amount of energy to cool it down to a liquid again.

As I said, you need a liquid that evaporates at ambient (in this case room temperature) and condenses again to a liquid say 5 to 10 degrees lower.

Hans von Lieven

and yes, she is getting better, probably able to go home next week. Thanks for asking.

ok what liquid would be best for ambient temperature? i am really thinking of making a huge (7-9 feet tall) bird to power my laptop (hopefully).