Post by: LB7 on 16/08/2018 08:18:46
https://www.thenakedscientists.com/forum/index.php?topic=74218.0
In my theoretical device, I took some simplifications: no mass, no friction, springs without volume. But in a real device, I will have friction: it is not a problem, friction is heating, it is an energy. I can't use springs like I defined in practice because springs will have a volume. So I will take a mass for the spheres and use it to have my direction of the orientation. The spheres in my theoretical device is replaced by a liquid, mercury for example.
Blue color is now mercury. To have a direction like I want for the attraction, I use the rotation and the acceleration. Rotation gives centrifugal force and a variable acceleration will give a variable tangential force, the combination of these two forces will give the direction I need in my theoretical device.
When I deformed the device, I need to change the orientation of the attraction.
At start:
r1.png (73.07 kB . 1000x655 - viewed 2634 times)Fa: force because I increase the rotational velocity: force of acceleration (F=ma)
Fc: force because there is a rotational velocity: centrifugal force (F=mw²r)
At final:
r2.png (45.21 kB . 1024x671 - viewed 2635 times)Note, I don't need gravity, so I can put the device in any direction, even for the calculations it is better to take the gravity vertical in the side view.
In my theoretical device the energy lost by the rotation of the 2 lateral walls is greater than the energy recovered from the difference of pressure when the volume moves out/in. Here, the device don't have no springs nor the green line.
The energy for the acceleration is recovered later. I think the energy inside the mass is transparent: I need but I recover later. I can only recover the energy from the deformation of the device and the hydraulic cylinders.
For the white bars, I take hydraulic cylinders:
Start:
1.png (41.53 kB . 790x442 - viewed 2649 times)Final:
y2.png (12.37 kB . 667x420 - viewed 2661 times)I will do the calculations.
Post by: LB7 on 17/08/2018 10:48:14
ds3.png (35.19 kB . 525x565 - viewed 2116 times) se1.png (65.53 kB . 767x630 - viewed 2040 times)Note, in practice the blue sphere is water and I use the acceleration and centrifugal force to have pressure like I want. It is more easy because the device can be very light. The white spheres are ceramic and blue spheres mercury. Density of mercury is 13.5 and the density of ceramic balls can be like 3. The size of the ceramic balls can be like 1 mm for example, it depends of the size of the device, for a big device 1 m³ the white balls could be at 1 cm³.
In my theoretical device, I took the force of the springs at 1N/m³. Here, the force depends of the acceleration but it is possible to have at least 10m/s² so the the equivalent force for the same volume with mercury is 135000 N (even there is near no mercury, the pressure will act). So, I need to multiply my result by 135000. For a rotation of pi/4, the energy wins is 0.035*135000 J by 4 devices it is 1884 J. If I can do the cycle each second, the power of the device is 1884 W.
Here, the integral to calculate the work from the white pressure:
d96.png (6.54 kB . 397x82 - viewed 2073 times)The sum is -0.207+0.17678+0.026840 = 0.0035
Even there is friction, it is an energy. Even the device is not perfect, I can have 50% of efficiency compared to the theory : the white spheres are bigger than in theory, there is friction, hydraulic cylinders are not perfect, the function acceleration/centrifugal_force is not perfect. So that device could be at least 1 kW it is not a big power to volume device but if the cycle could reach 10 times by second, the power passed to 10 kW.
Maybe it works with water, gravity and bubble. I will see the calculations.
Another possibility is to use blue sphere with a magnetic north pole all around it. The force of repulsion is controlled by the position of the sphere. Like that it is easy to have a big attraction in the direction I want. And I take bigger balls (not magnetic, in aluminium for example).