Upper Illustration:
   Water, and water vapor, along with everything else, are made of precision interacting force fields as we have learned from previous lessons. In our last lesson, we examined a simple mechanism for boiling water at room temperature. Being made of force fields, water will evaporate into a closed vacuum chamber until the force fields in the vapor balance the force fields in the water. By artificially changing either the pressure or the temperature, evaporation and also condensation can be completely and precisely controlled.

   This mechanism operates because the fundamental mechanism of the universe, resonant force fields, are precise, orderly, and sequenced in order to force their predetermined operation. The universe is not based on random uncertainty, but pseudorandom certainty. That's why water and water vapor always get it right and never forget how to do it.

Working Explanation:
   In the upper illustration, pipe (p1), and tank (t1) form a distillation column, wherein brine water (bw) evaporates into water vapor (wv). Vapor in this very low pressure volume can be extracted and condensed as fresh water. Note, the level differences between the input and output tanks are shown relative to one another because the system is gravity fed, and these relative heights must be maintained.

   Pipe (p2) and tank (t2) also form a column, which is taller than (p1), which is also tall enough so that ordinary changes in air pressure will not flood seawater from (p1) into (p2). (p2) is also tall enough to accommodate a heat exchanger that includes cold water jacket (wj). Cold sea water in (wj) cools pipe (p2) causing fresh water to condense on the inside, which exits as fresh drinking water from tank (t2).

   But because it is a naturally balancing system, condensation in (p2) automatically causes evaporation in (p1), replenishing the supply of vapor from the surface of the boiling brine water (bw).

   New seawater is continually supplied through pipe (p3), which fills water jacket (wj) before dumping into pipe (p1.) This has a number of functions.

   First. As water evaporates at the water surface (bw), what's left is brine, very heavy, very salty water. This sinks, with a little help from the flowing seawater, from input tank (t3), which is higher than exit tank (t1). Thus, new seawater from input tank (t3) replaces the water taken away by distillation in this continuously running system.

   Second, the new seawater is cooler than the vapor volume (wv). This is because the combination of (p2) and the water jacket (wj) form a counter flow heat exchanger. That means that the fluids move in opposite directions, but because of natural heat flow, it tends to remain warm on the top, and cool on the bottom.

   Incoming cool seawater cools pipe (p2). Condensing fresh water inside (p2) gives off heat to the cool seawater. This provides warm seawater, which is transported mechanically to the boiling surface at (bw) by the downhill flow from (t3) to (t1.)

   Fresh water is thus both condensed and cooled to provide refreshing drinking water from (t2), while the latent heat of evaporation is recycled within the system making the unit quite efficient. The height difference between tanks (t3) and (t1) causes warmed water in (wj) to pour into saltwater pipe (p1.) This heat was originally put into the water vapor as it evaporated in (p1). So by replacing it, it prevents the system from freezing up due to the evaporation. This in turn, also helps evaporate more water in (p1) conserving energy and making the system more efficient. As a result, only a small amount of lost energy needs to be replaced, which is done so by the water height differences.

   In addition to the energy needed to pump seawater into tank (t3), heat can be added to the system at the top of the boiling water (bw). To do this, make (p1) out of black pipe open to the sunlight, (the others being white, and always in the shade.) This provides a solar assist, producing more fresh water.

   To prevent the initial charge of water from contaminating the output pipe (p2), valves (v1), (v3), and (v4) are shut, and the entire apparatus (including all of the tanks,) are filled with fresh water from (v2). When completely full, with no air inside, then (v2) is closed, and the others opened.

Lower Illustration:
    Often dissolved air in the input water can reduce productivity. One way to deal with that is to add a jet (ejection) pump to the system. Jet pumps are good at removing gasses from the top of the column, while at the same time removing water vapor also. In the heat-exchanging pipe (p4), vapor forced into (p4) by the jet pump increases its pressure, while the water-vapor combination also cools from the cold input water in water jacket pipe wJ, both of which contribute to rapid condensation of the water vapor. Dissolved air continues to bubble through into, and then out of tank (t2).

    The mechanical pump does require additional energy, but it’s not much. It can be run from any convenient energy source, including solar power with the aid of a bank of solar cells.

   One can charge the system by closing valves (v1) (v3) and (v4). Then opening valve (v2) and filling the whole system with FRESH water. Then close (v2) and open the other 3 valves, (in that order.) The three tanks should fill with water out of the system, as vapor forms just below (v2).

    It may also be possible to initiate operations by putting some fresh water into tank (t2), and running the mechanical pump. The jet pump will then continue to remove air from the system until it has sucked up enough sea water until it evaporates.

    Also note: the system operates up at the top as a high vacuum. If the pipes or valves leak air, the system will either stop working, or will not function properly. Sometimes you can plug such leaks by applying a soft wax to the outside of the suspected air leak. The soft wax sold for sealing toilet bowels should work well.

    The result should be increased fresh water output while removing troublesome air from the system.

    Please report back the results of your research.