48V Air Conditioner for RV

Maintenance Heating & Air Conditioning
21

Regarding block and tackle, me chanical conversions, there is no extra energy generated in them. Its the basic law of phys,energy conservation. Using leverage is the easiest example of mechanical conversion.
The energy remains the same (minus energy loss due to friction,cooling, etc), it is the force that gets amplified though mech conversion. Energy, which is related to work done, remains the same.
Work done = Force * distance
Leverage uses longer distance on one end versus another, heavier end, block and tackle uses the same principle.
When water is put through narrow nozzle its kinetic energy increases, which is related to amount of work (in turn directly related energy) that can done by the water when it rotates generator head, however this kinetic energy can not come out of thin air, water has to be consuming a lot of pump energy to create enough mechanical energy to match generator output,theres no new energy that came come out of nowhere in this closed system. 5w water pump would have to run for 1000s of hours to generate enough energy to power such genny for 1 hour ( watt-joule conversion formula)

So unless I see a diagram that explains the physics behind it Im skeptical of perpetuum mobile generator stuff

22

Greetings!

The very first thing we learned in physics is that it is theory, not law, not reality, and nothing is absolute. Physics is fluid, silently updating when proven wrong. If inventors believed in physics, we’d still be living in the stone age.

Physics describes current beliefs in reality, but it does not define it nor impose restrictions upon it. Physics is like the bible, and can be interpreted many different ways by many different people.

Power and/or energy can also be interpreted in many different ways, amps, volts, watts, joules, blah, blah, blah. Anything to confuse & complicate the simple, and to make the fools appear smarter than they actually are.

We probably should not get caught up in the semantics of power or energy. Too much conflicting terminology and too many variations & definitions. Both can mean many different things.

The generator simply needs to turn at xx RPMs to generate it’s power and it doesn’t care what’s powering it because it’s being powered mechanically, not electrically.

The 12v @ 5 amp (note it’s 5 amps, not 5 watts) pump is attempting to pump 1200 gph through a high pressure nozzle, creating great force to mechanically turn the generator at xx+ RPMs successfully.

I opted for the simplest & consequently cheapest model without the bells & whistles, in hopes there will be less to go wrong with it. Mine requires me to turn it on or off manually, rather than automatically, and no remote/phone type stuff. But for $99 I’ve been very pleased with it, and the water pump looks like it could be easily replaced if needed.

Cheers!

"Beat Murphy's Law with a KISS! (Keep It Stupidly Simple)" ~ Van_Dweller



23

I very much disagree with this statement about Physics.
I have some background in the matter.

Closed loop hydro is simply energy storage method but the energy, equal to the output energy, has to come from somewhere, such as solar. No new energy can be generated in such system. Its merely a load balancing method. To run 3600watt generator, equal energy has to input into the system, and with 5w pump its going to be loooong run, forewer. Unless that 5w pump is pumping fuel, not water

24

Greetings!

I don’t think you successfully read my previous post…

It’s a 5 amp pump not 5 watts, pumping 1200 gallons per hour through a high pressure nozzle, and you’re using the ambiguous term “energy” again. “Energy” can come in many different flavors.

We’re talking about a very simple equation here. The generator simply must turn at xx RPM’s to output 3600w of power. The water pump & high pressure nozzle easily accomplish that. Does that mean the water pump & nozzle is putting out 3600+ watts of power? MAYBE… But why complicate the simple? The generator needs to turn at xx RPMs, and how that is accomplished is completely irrelevant, as long as it is accomplished.

What you’re saying is equivalent to a diesel engine can do it, but a gas engine can’t. Same difference, you say a stream can do it, but a pump can’t. Forget the term “energy” and it’s convoluted definitions, we’re talking about RPM’s, nothing more, nothing less.

The key phrase in the conservation of energy is: “– IF – energy is conserved, then the total will remain the same.” (from: Khan Academy). Which means that energy DOES NOT have to be conserved.

Can the laws of physics be disproved?

But no matter what, keep this important fact in mind: all knowledge in science, up to and including the most important laws, is provisional. It’s all based on the evidence. If the evidence changes, then we update our knowledge of physics, tearing down laws if we have to, and move on. Dec 5, 2023

Cheers!

"Old school, cheap, simple, reliable, and easily replaceable for the win!" ~ Traveler@Heart


25

Hello, little late to the conversation here. I’m looking at purchasing the 10kwh ecoflow for my sprinter and I’m curious if you would still buy the EcoFlow system or consider going with a traditional victron if you could do it over again? And not installing yourself. Thanks

Will