On the basis of this admission I created that device. Its operation is as follows:
A shorn in the middle hose whose lower end is placed in a container with water, for example a basin. The hose is oriented vertically and the upper end is placed in another body of water, for example another basin. At the point of the cut of the hose is placed a hermetically sealed container with two openings. At each of the openings is fit a return valve to allow movement of water only from the bottom up. When the sun heats the water in the container, it expands and some of the water will be pushed to the upper part of the hose through the upper return valve. If the water in the container begins to cool, it will shrink and vacuum will be created. The top return valve will not allow the water to return, and the vacuum in the container will open the lower return valve and thus will suck water through the bottom of the hose. Thus, the heating and cooling of the vessel will result in a continuous cycle of suction and pumping and a continuous motion of the water from the bottom upwards.

This principle is widely used in nature. The plants suck water from their root system as a result of it. The leaves are the heat exchanger (the container), and the return valves are located in the nodes of the plants, which are most visible in vine branches. Plants begin to grow when the ambient temperature exceeds the so-called biological zero (10⁰ C). At this temperature begins the movement of juices, hence the sun plays an important role. Extremely important role plays the wind, i.e. the air currents, which freely pass through the tree crown and every puff of wind cools the leaves. That is when suction starts, but the wind does not operate constantly. When it stops, the sun heats the leaves and they begin to push water up to the next leaf.

The heat exchanger can be of any shape, such as a barrel. Solar panels could also be used for heating the water. But most comfortable seems to be the pyramid shape, which is the shape of a tree crown as well. It allows the sun shine on it from sunrise to sunset. There are corridors in the pyramids, whose function is unknown to this day. They probably provide the cooling, i.e. the flow of air masses, which periodically cool the system, so that the regime of pumping and suction is not dependent solely on the change of day with night, but is activated by each puff of wind many times within the whole day.

The cascade shape of the pyramids is also of great importance, because if the walls were smooth, the sun rays would be reflected from them and the energy would dissipate in the surrounding area. The cascade shape largely increases the efficiency. The pipelines, through which runs the heated and cooled water, are probably installed in the walls. For a valve is most likely used an inserted into the opening stone, gravel over it, then a layer of sand and clay on top. The stone and gravel prevent the sand from falling down; and the clay seals the pores, so the water above it can not flow back down. From the bottom up, however, water can move, because when creating pressure, the clay is slightly raised and the water easily passes through the sand. Upon termination of pressure the clay falls back and clogs the pores.

The built probably 10/12 thousands years ago pyramids near the village of Vladimir have for centuries pumped water, but in the course of time the wind has heaped big land mass on them, then vegetation has grown, which has also heaped leaves and other materials, and as a result of that the solar rays can not act to the needed degree and therefore the available in the spring water had a very low rate. If the hills are cleared and the stones appear, I suppose that the flow rate of pumped water will be much greater.

From now on optimization of the mechanism is ahead and I announce this idea of mine and will give it wide publicity as I cannot patent it because of financial reasons arising from the Bulgarian legislation.

Here is an illustration of an exemplary model of the device:

To heat exchanger (1) pipings (2) and (5) with valves (3) and (4) are connected. Action pursuant to the invention is as follows: heated fluid in the heat exchanger expands and creates pressure at which valve (4) opens and the fluid is directed to piping (5). At cooling inside the heat exchanger vacuum is created, which opens valve (3) and fluid from piping (2) is sucked.

Vasil Sapundjiev

Bulgaria