David Bowling's Continuous Charging Device

[tinman]

TinMan,
Thanks for taking a look at this. You are probably one of the only skeptics who has actually taken the time to actually build this and test it, and I appreciate that. As I said on the other thread, every single component we are using is designed to do something specific to create a working system. I know you are only testing the basic setup now, so I am looking forward to seeing your results when all the pieces are put together. And I DO realize that your current test does not support my claim that "hardly any energy gets used as it moves through the inverter" but I still believe you are in for more surprises when you get the system to run as a stable system by adding the boost module to the mix, and see what happens when you rotate and rest batteries.


I have found that as I rotate the batteries through the system over the long haul, my results get better and better as the batteries expand their capacity, begin to charge faster, and hold charge longer. But if you continue to be interested in this long enough to do the long term testing I have done, I believe you will see everything I have seen. I hope so.

Well the first video has finished uploading--see link below.

I have completed the second test under much more stable conditions,and the results are the same.
I will post that video as soon as it has finished uploading.
Even with the more accurate testing,i still have a higher efficiency with the 3 battery system than i do with just the single battery running the inverter.
I am at a loss as to why ATM,but i will keep testing to see if i can find the answer.
I have a 12% efficiency gain with the 3 battery system,than that of the single battery system,and this should not be the case. The efficiency should drop when extra components and batteries are used,due to the increase of resistance to the system,and there for ,more waste heat--,but the efficiency rises for some reason when all these extra components are introduced.

So i must admit !!ATM!!,that something odd is happening here,and as yet,i do not have an answer for that---time will tell.

https://www.youtube.com/watch?v=oSIjmmCw6xg


Brad

[pomodoro]

Brad, I've only looked at the video for a short while but it looks to me that you are taking the average of two efficiencies for the first calc. (Inverter efficiency + the charging efficiency of the battery)/2. This gives you the 80%.  The separate charger efficiency is the 60% one.   The charging efficiency could be in the 90s, thus the average is higher than that of the charger alone.

You cant work these easily because the voltages across both devices change with time, as the battery charges. and you also need to measure how much of the energy into the battery actually got stored by the battery.  Its much more than a multimeter job.

[tinman]

Brad, I've only looked at the video for a short while but it looks to me that you are taking the average of two efficiencies for the first calc. (Inverter efficiency + the charging efficiency of the battery)/2. This gives you the 80%.  The separate charger efficiency is the 60% one.   The charging efficiency could be in the 90s, thus the average is higher than that of the charger alone.

You cant work these easily because the voltages across both devices change with time, as the battery charges. and you also need to measure how much of the energy into the battery actually got stored by the battery.  Its much more than a multimeter job.

Yes i know what your saying about the voltages changing quickly,but in the next video/test,i have stabilized the voltages,and have far more accurate power measurements.

As far as averaging out the efficiency's go's,well as we have a single supply,then the efficiency is subtractive,not averaged.
If we ran just the charging system without the inverter,then we may have an efficiency of say 90%. We then add in our inverter,and we loose say a further 20%-these two arnt averaged out to give you an efficiency for the system as a whole,they are added together to get the total efficiency of the system,and that would equal a total of 70%--a loss of 10% + a loss of 20%

We have a set efficiency for the inverter,and whether that inverter runs on 12 volts at say 3 amps,or 24 volts at 1.5 amps,the P/in remains the same,and the P/out remains the same,as the efficiency of the inverter is set at 69.68%. Even if there was no loss in the second part of the system,so the battery charging was 100% efficient,the efficiency of the inverter will still remain the same,and the total efficiency will still be 69.68% when the inverter is added in to the system.

Here are the calculations from the last test i did(video to come).These are from my latest tests,with stable voltages.

12 volt battery and inverter alone
P/in=12.02v @ 2.89 amps 34.73 watt's
P/out to 240v bulb= 24.2 watts
Efficiency = 69.68%
So we can see here that the inverter is dissipating close to 30.32% of the input power,minus small losses through the meter shunt and wiring.

3 battery system
P/in= 73.127 watts
P/out battery and 12v globe= 35.53 watts
P/out to 240v bulb=24.6 watts
Total P/out= 60.133 watts.
Efficiency= 82.23%
So the charge battery and 12v globe are consuming 48.58% of the input power.
The 240v bulb is consuming 33.64% of the input power.
So we have accounted for 82.23% of the power,and that is the same as the 82.23% calculated efficiency.In the 3 battery test,we can assume that battery losses are higher,as there is now 3 batteries instead of just 1,and the same amp meter is in the same position as before.
In both tests,the voltage was regulated to 12 volts across the inverter--so that remains a constant.

In the 3 battery system,we are dissipating 17.77% of the input power through the batteries,meter and inverter.
In the single battery system,we are dissipating 30.32% of the input power through just 1 battery,the meter,and inverter.

How can we check our numbers against them self?,well we just subtract the 3 battery system efficiency from the single battery efficiency,and that is-->82.23%-69.68%=12.55% difference.
Now,if we subtract the power the inverter,batteries,and meter are dissipating in the 3 battery system,from the power dissipated by the inverter,battery,and meter in the single battery system,then we should end up with the same as the efficiency difference.
30.32%-17.77%= a difference of 12.55%-->the very same as our efficiency difference.

It will become more clear in the next video,as to what all those numbers are about.


Brad

[tinman]

and you also need to measure how much of the energy into the battery actually got stored by the battery.  Its much more than a multimeter job.

To clear this up,we are not measuring stored energy,we are measuring energy delivered to the system,and energy consumed/dissipated by each component,and the efficiency that the system as a whole can do that.


Brad

[pomodoro]

In the 3 battery system Work out the power used by the inverter by measuring the potential across its input terminals  and the amps! I don't see this voltage in your 3 battery test.