I am looking for a conceptual way of dealing with the following. I am not looking for a set of blueprints.
Consider a 5 meter x 10 cm vertical closed tube filled with a substance in the gas and liquid phases. The height is chosen to be out of range of capillary action with common materials.
The upper end is 10-30 C higher temperature than the lower end.
In normal circumstances the liquid is at the bottom, with the space above filled with the gas phase.
I am looking for simple way to move some liquid from the bottom to the top, without using moving parts, with all apparatus to be contained within the tube. Cooling part of the upper end of the tube to an intermediate temperature is acceptable.
To do it with moving parts is straightforward. The temperature difference drives a heat engine which pumps the liquid.
What physical principles can be leveraged to achieve this?
- A sufficiently fine grain wick can do this, but the transfer rate is low.