Fool wrote: ↑Sun Nov 24, 2024 10:19 am
From the first photo in this thread, I can see it working...
OP is similar this basic KPP scam (Kinetic Power Plant)
- KPP PMD.png (601.28 KiB) Viewed 346 times
https://www.youtube.com/watch?v=68nRS8VckUE
Most of these buoyancy schemes prey on several facts that are more obscure than heat engine issues.
When a ship sinks, you don't want to be near it to avoid being "sucked under". However, the sinking sink is not 'sucking' anything akin Tom buzz. Instead, the escaping air merely displaces some water, whereupon this bubbling water is lighter than surrounding non-bubbling water, so anything caught in this bubbling water will have less buoyancy.
My problem with OP is similar this KPP scam. Consider KPP scheme is 2 tubes like flooid scheme with air pumped in near base of up tube. Since air bubbles expand during ascent, if we assume the AVERAGE displacement of water in up tube is 50%, then this 50-50% air-water up tube volume equals 2x the 100% water down tube volume. If we further assume down tube water is descending at a constant speed equal up tube water at bottom prior air injection, then after air injection, this ascent speed will accelerate if both tubes are the same diameter.
As Vincent recently pointed out, regardless of bubbles, the pressure at bottom of both tubes will be the same...unless the up tube has 'slugs' of air separating slugs of water (aka lift pump). IOW simply fizzing some air into water column will not effect water pressure anywhere in water column, but even fizzing water will lift 'some' water. The bottom line with this simple analysis is that the ENERGY force required to pump air into the bottom of a water column is effected more by the PRESSURE force of the water column than the "weight".
Returning to the flooid scheme/scam, the air expands during ascent and we can consider this isothermal expansion via ambient input. This is where the schmooze starts creeping in...where we're supposed to believe that some type of heat engine effect is doing most of the 'heavy lifting' due to this expansive "work". Now, if we consider an ideal air lift pump with slugs of air injected at bottom and with isothermal heating during ascent, then as the water slugs ascend, each air slug looses pressure with each air slug only having the pressure of the air-water column above it. I'm surprised that Fool hasn't worked out this energy balance yet, I just don't care to.