Peter Davey Heater

[DOCV]

Another realisation - using distilled water and electrolyte will allow me to control the current used, so I can measure it with the meter!!! (10A max.)

So some hard-figures:

Started with approx. 350-400mL of distilled water, room temp, with a microscopic amount of of sodium bicarbonate added, and used the 'little' Davey heater.  It took 150 seconds to boil, (rather, I stopped it after that, 'cos it was boiling nicely) starting out drawing just under 3A @ 230V AC, climbing to a max. of 4.2A leading up to boiling, before finally dropping back to a little above 3A when boiling!

Efficiency anyone???

To be precise you needto weigh the water so the exact ml are measured. Also the starting water temp and end water temp. Not all water boils at 100 deg, depends where you live. Also don't assume you are receiving 230v this needs to be measured before and after test. If you have a watt meter, then voltage and amp measurements are unecessary.
Also check if amps are gradual rise with water temp and do they jump around when the bubbling starts

[Sprocket]

To be precise you needto weigh the water so the exact ml are measured. Also the starting water temp and end water temp. Not all water boils at 100 deg, depends where you live. Also don't assume you are receiving 230v this needs to be measured before and after test. If you have a watt meter, then voltage and amp measurements are unecessary.
Also check if amps are gradual rise with water temp and do they jump around when the bubbling starts

Hi.  Yes, most of what you say, I already realised, but a ball-park figure was all I was expecting.   Typical UK climate, voltage never seems to vary from 225V RMS, and as I mentioned, current grew progressively from about 2.9A to max-out at 4.2A at the onset of boiling, before falling again to 3.1A when boiling vigorously.

[simon155]

Pete - A suggestion for ya:

Build several devices and attach em to the side of a sealed tank. Don't forget to insulate it well. Use rechargable batteries for the input. Stick turbines in the top and mop up any power produced, feeding the water back into the tank when cooled. Pipe the power back into the rechargable batteries.

If you get it working and nicely tuned, stick it in a car. If they aren't interested in listening to an energy efficient kettle, see if you can solve the world's fuel crisis on day one ;o)

[simon155]

You'd have to ask for someone who deals with law on this, but if they are trying to stop you marketing your invention, look into selling the "parts" and attaching your "design" as a free "newsletter". Is this a way to escape from marketing the finished product, and still make it available?

Sure there's got to be a hefty legal mess somewhere but must be a way round it for ya.

Good luck!

[devrimogun]

Thinking about Davey device I realized that it may be a tricky way to use a very little power to maintain heat action is such device. That way would not be mechanical or electrical mainly, but rather electromagnetic. It may look very strange or like a crazy idea but the only convertion from electrical to mechanical power (which is required to generate sound I suppose - sonic response of bells) is ELECTROMAGNET!

I must disagree. You could get another device that heats water with the setup you are describing.
But that will not be Davey's device.

Lets not make things more complicated then they are.
Davey => Sax player => music => frequency => mains  => simple device using bells