At one time I worked with ‘Maurice’ who had been a shift engineer at a large
steam power plant in the mid-west. Following his death his widow gave me a huge
box of his papers and memorabilia of those day with the power plant.
The attached proposal was one of the most intriguing of all. Perhaps you will
find it of interest."
TOTALLY INSANE PERPETURAL MOTION and/or OVERUNITY MACHINE(S)
Consider 2 parallel, vertical, ‘mile high’ tubes connected across top and bottom by 2 horizontal tubes, wherein a 2 phase working fluid operates in a closed Rankine cycle. Top tube has a condenser, and bottom tube has a steam engine with conventional heat source. Consider the 2 vertical tubes as 1 liquid and 1 vapor tube. Standing column of Hg in liquid tube passes valve at base, is heated, passed thru engine, up vapor tube to condenser, and back to liquid tube to complete circuit. Are you getting the idea???In this case we will consider a heavy liquid that achieves critical pressure on its own, effectively, stealing this energy later. Theoretically, the Hg releases more heat condensing than required vaporizing. Indeed, this requires a rather long tube, even for Hg, but the back pressure of the vapor column, flow loss, etc. will increase the calculation hours. There is no doubt that this will ever work. It may even lead to an improvement or two elsewhere.
This system operates as a PM when you compute the ratio of specific heat to latent heat at both critical pressure and the pressure at the condenser(0 ?). Hg has a low specific tolatent ratio, and therefore, a smaller amount of heat would vaporize the liquid than released when condensed. Thus, stealing the internal energy from pressure and releases it as heat. Notice the change in specific heat with extreme pressure, that’s an additional aspect. Now, if the Qin at the boiler remains less than Qout at the condenser, presto: PM! This avoids the issue of getting Qout back (down) to Qin.
The design calculations start:
- Choose a fluid.
- Find specific/latent ratio at top of liquid tube.
- Find specific/latent ratio at bottom of liquid tube.
- Play the ends against the middle.
If Qin remains less than Qout you have a simple PM; if Qin is more than Qout you still have Overunity. Thinking through the design forces consideration of a better definition of PM and Overunity. We are forced to think conceptually, in total energy terms then divide things back to reality.
As calculations continue, reality complicates the simplicity of this insane idea, as we continue.
- Vapor column has pressure gradient with back pressure on engine
- Under these pressures the vapor flow is non uniform, tremendously
complicating flow friction calculations.
- A long flow with pressure gradient(s) is very delicate.
NOTE: Natural gas line companies have a tough problem increasing the flow rate beyond a certain point without inducing a further .08 work loss from adiabatic compressions/expansions which heat or cool the gas, isothermally, through the pipe.
March 31, 1954